CA2552443A1 - Multichannel cdma subtractive interference canceler - Google Patents
Multichannel cdma subtractive interference canceler Download PDFInfo
- Publication number
- CA2552443A1 CA2552443A1 CA002552443A CA2552443A CA2552443A1 CA 2552443 A1 CA2552443 A1 CA 2552443A1 CA 002552443 A CA002552443 A CA 002552443A CA 2552443 A CA2552443 A CA 2552443A CA 2552443 A1 CA2552443 A1 CA 2552443A1
- Authority
- CA
- Canada
- Prior art keywords
- channel
- channels
- received signal
- unit
- despreading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7107—Subtractive interference cancellation
- H04B1/71075—Parallel interference cancellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/709—Correlator structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/709—Correlator structure
- H04B1/7093—Matched filter type
Abstract
A plurality of channels are received as a received signal. Each channel is associated with a code. For each of the plurality of channels, others of the plurality of channels are subtracted from the received signal and a result of that subtracting is despread as data for that channel.
Claims (7)
1. A remote unit having a receiver for recovering data transmitted over a plurality of channels employing a wireless code division multiple access communication technique, the receiver comprising:
a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and a unit for subtracting for each of the plurality of channels, others of the plurality of channels from the received signal and despreading a result of that subtraction as data for that channel.
a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and a unit for subtracting for each of the plurality of channels, others of the plurality of channels from the received signal and despreading a result of that subtraction as data for that channel.
2. The remote unit receiver of claim 1 wherein the subtracting unit includes, for each channel:
a unit for despreading the received signal with the others channels codes;
a unit for respreading the despread others channel codes; and a unit for subtracting from the received signal the respread other channels.
a unit for despreading the received signal with the others channels codes;
a unit for respreading the despread others channel codes; and a unit for subtracting from the received signal the respread other channels.
3. The remote unit receiver of claim 2 wherein the despreading means is a mixer.
4. The remote unit receiver of claim 2 wherein the despreading means is a matched filter.
5. A remote unit receiver for recovering data transmitted over a plurality of channels employing a wireless code division multiple access communication technique, comprising:
a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and for each of the plurality of channels, a subtractor for subtracting others of the plurality of channels from the received signal and despreading a result of that subtraction as data for that channel.
a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and for each of the plurality of channels, a subtractor for subtracting others of the plurality of channels from the received signal and despreading a result of that subtraction as data for that channel.
6. The remote unit receiver of claim 5 further comprising:
for each channel, a first mixer operatively coupled to the input for despreading the received signal with that channel code;
for each channel, a second mixer for respreading that channel despread signal; and wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.
for each channel, a first mixer operatively coupled to the input for despreading the received signal with that channel code;
for each channel, a second mixer for respreading that channel despread signal; and wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.
7. The remote unit of claim 5 further comprising:
for each channel, a matched filter operatively coupled to the receiving unit for despreading the received signal with that channel code;
for each channel, a mixer for respreading that channel despread signal;
and wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.
for each channel, a matched filter operatively coupled to the receiving unit for despreading the received signal with that channel code;
for each channel, a mixer for respreading that channel despread signal;
and wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/279,477 | 1994-07-26 | ||
US08/279,477 US5553062A (en) | 1993-04-22 | 1994-07-26 | Spread spectrum CDMA interference canceler system and method |
CA002369499A CA2369499C (en) | 1994-07-26 | 1995-07-05 | Multichannel cdma subtractive interference canceler |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002369499A Division CA2369499C (en) | 1994-07-26 | 1995-07-05 | Multichannel cdma subtractive interference canceler |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2552443A1 true CA2552443A1 (en) | 1996-02-08 |
CA2552443C CA2552443C (en) | 2010-10-05 |
Family
ID=23069142
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2552443A Expired - Lifetime CA2552443C (en) | 1994-07-26 | 1995-07-05 | Multichannel cdma subtractive interference canceler |
CA002195534A Expired - Lifetime CA2195534C (en) | 1994-07-26 | 1995-07-05 | Spread spectrum interference canceler system and method |
CA002342454A Expired - Lifetime CA2342454C (en) | 1994-07-26 | 1995-07-05 | Spread spectrum interference canceler system and method |
CA002369499A Expired - Lifetime CA2369499C (en) | 1994-07-26 | 1995-07-05 | Multichannel cdma subtractive interference canceler |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002195534A Expired - Lifetime CA2195534C (en) | 1994-07-26 | 1995-07-05 | Spread spectrum interference canceler system and method |
CA002342454A Expired - Lifetime CA2342454C (en) | 1994-07-26 | 1995-07-05 | Spread spectrum interference canceler system and method |
CA002369499A Expired - Lifetime CA2369499C (en) | 1994-07-26 | 1995-07-05 | Multichannel cdma subtractive interference canceler |
Country Status (16)
Country | Link |
---|---|
US (15) | US5553062A (en) |
EP (3) | EP0772928B1 (en) |
JP (2) | JP3153894B2 (en) |
CN (8) | CN1252957C (en) |
AT (3) | ATE460785T1 (en) |
AU (1) | AU701816B2 (en) |
BR (2) | BR9510804B1 (en) |
CA (4) | CA2552443C (en) |
DE (6) | DE1033840T1 (en) |
DK (6) | DK1033840T3 (en) |
ES (3) | ES2137140T3 (en) |
FI (2) | FI115430B (en) |
HK (7) | HK1030697A1 (en) |
NZ (2) | NZ314383A (en) |
SE (5) | SE532856C2 (en) |
WO (1) | WO1996003819A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007112585A1 (en) * | 2006-04-05 | 2007-10-11 | Research In Motion Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
US7672412B2 (en) | 2006-04-05 | 2010-03-02 | Research In Motion Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
Families Citing this family (179)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5553062A (en) * | 1993-04-22 | 1996-09-03 | Interdigital Communication Corporation | Spread spectrum CDMA interference canceler system and method |
FI943889A (en) * | 1994-08-24 | 1996-02-25 | Nokia Telecommunications Oy | A method for adjusting the transmission power in a cellular radio system and a receiver |
FI105514B (en) * | 1994-09-12 | 2000-08-31 | Nokia Mobile Phones Ltd | Reception procedure and recipients |
FI97180C (en) * | 1994-11-03 | 1996-10-25 | Nokia Mobile Phones Ltd | Method for channel estimation and receiver |
US5978413A (en) * | 1995-08-28 | 1999-11-02 | Bender; Paul E. | Method and system for processing a plurality of multiple access transmissions |
FI99067C (en) * | 1995-11-02 | 1997-09-25 | Nokia Mobile Phones Ltd | Reception procedure and recipients |
US5872776A (en) * | 1995-11-22 | 1999-02-16 | Yang; Lin-Lang | Signal detection and interference cancellation based on simplified matrix inversion for CDMA applications |
US5862173A (en) * | 1995-12-11 | 1999-01-19 | Ericsson Inc. | Re-orthogonalization of wideband CDMA signals |
JP3272940B2 (en) * | 1996-03-07 | 2002-04-08 | ケイディーディーアイ株式会社 | Spread spectrum signal demodulator |
US5887034A (en) * | 1996-03-29 | 1999-03-23 | Nec Corporation | DS-CDMA multiple user serial interference canceler unit and method of transmitting interference replica signal of the same |
US5629929A (en) * | 1996-06-07 | 1997-05-13 | Motorola, Inc. | Apparatus for rapid interference cancellation and despreading of a CDMA waveform |
KR100197352B1 (en) * | 1996-07-31 | 1999-06-15 | 이계철 | Parallel acquisition system with reference filter |
JP2798128B2 (en) * | 1996-08-06 | 1998-09-17 | 日本電気株式会社 | CDMA multi-user receiver |
US6067292A (en) * | 1996-08-20 | 2000-05-23 | Lucent Technologies Inc | Pilot interference cancellation for a coherent wireless code division multiple access receiver |
JP3311943B2 (en) * | 1996-10-18 | 2002-08-05 | 松下電器産業株式会社 | Interference signal canceller |
US6192087B1 (en) | 1996-11-15 | 2001-02-20 | Conexant Systems, Inc. | Method and apparatus for spectral shaping in signal-point limited transmission systems |
US6278744B1 (en) | 1996-11-15 | 2001-08-21 | Conexant Systems, Inc. | System for controlling and shaping the spectrum and redundancy of signal-point limited transmission |
IL119752A0 (en) * | 1996-12-04 | 1997-09-30 | Israel State | Asynchronous CDMA decorrelating detector |
US5787130A (en) * | 1996-12-10 | 1998-07-28 | Motorola Inc. | Method and apparatus for canceling interference in a spread-spectrum communication system |
JP3390900B2 (en) * | 1996-12-20 | 2003-03-31 | 富士通株式会社 | Interference canceller and provisional determination method |
FI109735B (en) * | 1997-02-28 | 2002-09-30 | Nokia Corp | Reception procedure and recipients |
US6161209A (en) * | 1997-03-28 | 2000-12-12 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Industry Through The Communications Research Centre | Joint detector for multiple coded digital signals |
US6111895A (en) * | 1997-05-14 | 2000-08-29 | At&T Corp. | Wideband transmission through wire |
US5894500A (en) * | 1997-06-13 | 1999-04-13 | Motorola, Inc. | Method and apparatus for canceling signals in a spread-spectrum communication system |
KR19990010110A (en) | 1997-07-15 | 1999-02-05 | 윤종용 | Apparatus and method for eliminating multiple access interference in mobile communication systems |
US6302982B1 (en) * | 1997-10-09 | 2001-10-16 | Comfortex Corporation | Method of fabrication of fabric venetian blind |
FR2770060B1 (en) * | 1997-10-22 | 1999-11-19 | Commissariat Energie Atomique | DIFFERENTIAL DIRECT SEQUENCE SPREAD SPECTRUM RECEIVER WITH MIXED INTERFERENCE SIGNAL FORMATION MEANS |
FR2770059B1 (en) | 1997-10-22 | 1999-11-19 | Commissariat Energie Atomique | CIRCUIT FOR SPREAD SPECTRUM DIGITAL TRANSMISSION BY DIRECT SEQUENCE WITH GENERATION OF AN INTERFERENCE SIGNAL |
US5894494A (en) * | 1997-10-29 | 1999-04-13 | Golden Bridge Technology, Inc. | Parallel correlator architecture for synchronizing direct sequence spread-spectrum signals |
GB9724048D0 (en) * | 1997-11-14 | 1998-01-14 | Univ Edinburgh | Communications terminal and operating method |
JPH11168408A (en) * | 1997-12-05 | 1999-06-22 | Fujitsu Ltd | Interference canceler system |
KR100277925B1 (en) * | 1997-12-22 | 2001-02-01 | 서평원 | Multiuser defectors for DS-CDMA systems and it's method |
KR19990052334A (en) * | 1997-12-22 | 1999-07-05 | 서평원 | Multiuser Detection Apparatus and Method of Direct Diffusion Code Division Multiple Access System |
KR100255565B1 (en) | 1997-12-26 | 2000-05-01 | 정선종 | Method and apparatus of multi-mode subtractive interference cancellation for asynchronous multi-path channels in cdma system |
US6175587B1 (en) | 1997-12-30 | 2001-01-16 | Motorola, Inc. | Communication device and method for interference suppression in a DS-CDMA system |
US6175588B1 (en) | 1997-12-30 | 2001-01-16 | Motorola, Inc. | Communication device and method for interference suppression using adaptive equalization in a spread spectrum communication system |
FI105741B (en) | 1998-02-12 | 2000-09-29 | Nokia Networks Oy | Communication method and radio system |
FR2776869B1 (en) * | 1998-03-24 | 2000-05-05 | Commissariat Energie Atomique | CDMA RECEIVER WITH PARALLEL INTERFERENCE SUPPRESSION AND WEIGHTING |
JP3024750B2 (en) | 1998-04-07 | 2000-03-21 | 日本電気株式会社 | DS-CDMA multi-user interference canceller and DS-CDMA communication system |
US6445692B1 (en) * | 1998-05-20 | 2002-09-03 | The Trustees Of The Stevens Institute Of Technology | Blind adaptive algorithms for optimal minimum variance CDMA receivers |
JP2970656B1 (en) * | 1998-06-25 | 1999-11-02 | 日本電気株式会社 | DS-CDMA multi-user interference canceller |
US6647022B1 (en) * | 1998-08-07 | 2003-11-11 | Lucent Technologies Inc. | Interference canceller |
JP3031348B2 (en) | 1998-08-28 | 2000-04-10 | 日本電気株式会社 | CDMA multi-user interference canceller |
SG121695A1 (en) * | 1998-08-31 | 2006-05-26 | Oki Techno Ct Signapore Pte Lt | Receiving device and channel estimator for use in a cdma communication system |
SG84514A1 (en) | 1998-08-31 | 2001-11-20 | Oki Techno Ct Singapore Pte | Receiving device and channel estimator for use in a cdma communication system |
US6320920B1 (en) * | 1998-10-08 | 2001-11-20 | Gregory Lee Beyke | Phase coherence filter |
US6498784B1 (en) * | 1998-10-20 | 2002-12-24 | Interdigital Technology Corporation | Cancellation of pilot and traffic signals |
US6687461B1 (en) | 1998-11-04 | 2004-02-03 | Board Of Regents, The University Of Texas System | Active optical lattice filters |
US6249544B1 (en) * | 1998-11-13 | 2001-06-19 | Broadcom Corporation | System and method for high-speed decoding and ISI compensation in a multi-pair transceiver system |
KR100283379B1 (en) * | 1998-11-16 | 2001-03-02 | 정선종 | Parallel Multistage Interference Cancellation |
JP3301735B2 (en) * | 1998-12-08 | 2002-07-15 | 日本無線株式会社 | Interference wave cancellation device |
US6700923B1 (en) | 1999-01-04 | 2004-03-02 | Board Of Regents The University Of Texas System | Adaptive multiple access interference suppression |
US6215812B1 (en) | 1999-01-28 | 2001-04-10 | Bae Systems Canada Inc. | Interference canceller for the protection of direct-sequence spread-spectrum communications from high-power narrowband interference |
SE9900684L (en) * | 1999-02-26 | 2000-08-27 | Ericsson Telefon Ab L M | Interference suppression in radio stations |
US7027537B1 (en) | 1999-03-05 | 2006-04-11 | The Board Of Trustees Of The Leland Stanford Junior University | Iterative multi-user detection |
AU3614500A (en) * | 1999-03-05 | 2000-09-21 | Board Of Trustees Of The Leland Stanford Junior University | Iterative multi-user detection |
FR2791841B1 (en) * | 1999-04-02 | 2001-05-11 | Commissariat Energie Atomique | RECEIVER MODULE AND RECEIVER COMPOSED OF SEVERAL CASCADE MOUNTED MODULES |
US6236362B1 (en) | 1999-04-20 | 2001-05-22 | Harris Corporation | Mitigation of antenna test range impairments caused by presence of undesirable emitters |
US6184826B1 (en) | 1999-04-20 | 2001-02-06 | Harris Corporation | Extension of dynamic range of emitter and detector circuits of spread spectrum-based antenna test range |
US6782036B1 (en) | 1999-05-26 | 2004-08-24 | Board Of Regents, The University Of Texas System | Smart antenna multiuser detector |
KR100343773B1 (en) | 1999-06-28 | 2002-07-19 | 한국전자통신연구원 | Apparatus and method of partial parallel interference cancellation system for CDMA |
FR2795893B1 (en) | 1999-07-01 | 2001-08-17 | Commissariat Energie Atomique | CDMA RECEIVER WITH PARALLEL INTERFERENCE SUPPRESSION AND OPTIMIZED SYNCHRONIZATION |
JP3367475B2 (en) * | 1999-07-06 | 2003-01-14 | 日本電気株式会社 | Wireless communication device and power consumption control method for wireless communication device |
US6404760B1 (en) | 1999-07-19 | 2002-06-11 | Qualcomm Incorporated | CDMA multiple access interference cancellation using signal estimation |
US6975666B2 (en) | 1999-12-23 | 2005-12-13 | Institut National De La Recherche Scientifique | Interference suppression in CDMA systems |
JP3515721B2 (en) * | 1999-12-28 | 2004-04-05 | 松下電器産業株式会社 | Interference signal elimination apparatus and interference signal elimination method |
KR100323769B1 (en) * | 1999-12-31 | 2002-02-19 | 서평원 | Parallel-type interference cancellation method of asynchronous transmission system |
FI115268B (en) * | 2000-05-12 | 2005-03-31 | Nokia Corp | Power control in a radio system |
JP3793687B2 (en) * | 2000-05-12 | 2006-07-05 | 株式会社日立コミュニケーションテクノロジー | Radio base station and mobile communication system |
DE10026615B4 (en) * | 2000-05-19 | 2004-12-23 | Systemonic Ag | Method and arrangement for receiving CDMA signals |
US7072409B2 (en) * | 2000-05-23 | 2006-07-04 | Ntt Docomo, Inc. | Space multiplex radio communication method and radio communication apparatus |
US7130292B2 (en) * | 2000-06-02 | 2006-10-31 | Essex Corporation | Optical processor enhanced receiver architecture (opera) |
US8363744B2 (en) | 2001-06-10 | 2013-01-29 | Aloft Media, Llc | Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks |
US6741637B1 (en) | 2000-06-22 | 2004-05-25 | Golden Bridge Technology, Inc. | Method and apparatus of joint detection of a CDMA receiver |
DE60024890T2 (en) * | 2000-09-13 | 2006-06-14 | Nortel Networks Ltd | MULTI-USER DETECTION IN A CDMA COMMUNICATION SYSTEM |
US7035317B2 (en) * | 2000-09-21 | 2006-04-25 | North Carolina State University | Single-user decoder metrics for subtractive interference cancellation detectors in code-division multiple-access (CDMA) communication systems with time dependence variance residual multiple-access interference (RMAI) |
CA2323164A1 (en) * | 2000-10-11 | 2002-04-11 | Ramesh Mantha | Method, system and apparatus for improving reception in multiple access communication systems |
US6856945B2 (en) | 2000-12-04 | 2005-02-15 | Tensorcomm, Inc. | Method and apparatus for implementing projections in singal processing applications |
US6711219B2 (en) | 2000-12-04 | 2004-03-23 | Tensorcomm, Incorporated | Interference cancellation in a signal |
US7016332B2 (en) * | 2000-12-05 | 2006-03-21 | Science Applications International Corporation | Method and system for a remote downlink transmitter for increasing the capacity of a multiple access interference limited spread-spectrum wireless network |
US7035354B2 (en) * | 2000-12-08 | 2006-04-25 | International Business Machine Corporation | CDMA multi-user detection with a real symbol constellation |
FI20002857A0 (en) * | 2000-12-27 | 2000-12-27 | Nokia Networks Oy | Method and arrangement for implementing power control |
JP2002232397A (en) * | 2001-01-31 | 2002-08-16 | Ntt Docomo Inc | Receiving processing method and receiving equipment in mobile communication system |
US7061891B1 (en) | 2001-02-02 | 2006-06-13 | Science Applications International Corporation | Method and system for a remote downlink transmitter for increasing the capacity and downlink capability of a multiple access interference limited spread-spectrum wireless network |
US7636403B2 (en) | 2001-02-20 | 2009-12-22 | Massachusetts Institute Of Technology | Correlation shaping multi-signature receiver |
US7751469B2 (en) | 2001-02-20 | 2010-07-06 | Massachusetts Institute Of Technology | Correlation shaping matched filter receiver |
US20020143854A1 (en) * | 2001-03-29 | 2002-10-03 | International Business Machines Corporation | Fault-tolerant mobile agent for a computer network |
US7209515B2 (en) * | 2001-03-30 | 2007-04-24 | Science Applications International Corporation | Multistage reception of code division multiple access transmissions |
US7697594B2 (en) * | 2001-03-30 | 2010-04-13 | Texas Instruments Incorporated | Method and apparatus for regenerative based interference cancellation within a communication system |
US6580771B2 (en) * | 2001-03-30 | 2003-06-17 | Nokia Corporation | Successive user data multipath interference cancellation |
US7190710B2 (en) * | 2001-06-08 | 2007-03-13 | Broadcom Corporation | Successive interference canceling for CMDA |
US7133435B2 (en) * | 2001-06-20 | 2006-11-07 | Texas Instruments Incorporated | Interference cancellation system and method |
EP1421757A4 (en) * | 2001-08-21 | 2009-12-09 | Infineon Technologies Ag | Method and apparatus for enhancing data rates in spread spectrum communication systems |
US7006461B2 (en) * | 2001-09-17 | 2006-02-28 | Science Applications International Corporation | Method and system for a channel selective repeater with capacity enhancement in a spread-spectrum wireless network |
US7158559B2 (en) * | 2002-01-15 | 2007-01-02 | Tensor Comm, Inc. | Serial cancellation receiver design for a coded signal processing engine |
US8085889B1 (en) | 2005-04-11 | 2011-12-27 | Rambus Inc. | Methods for managing alignment and latency in interference cancellation |
US6904106B2 (en) * | 2001-10-09 | 2005-06-07 | Texas Instruments Incorporated | Method and apparatus for spread spectrum interference cancellation |
US7400608B2 (en) * | 2001-10-09 | 2008-07-15 | Texas Instruments Incorporated | Method and apparatus for spread spectrum interference cancellation |
US7133432B2 (en) * | 2001-10-17 | 2006-11-07 | Motorola, Inc. | Collision mitigation methods used in a communication system |
US6961395B2 (en) * | 2001-11-16 | 2005-11-01 | Nortel Networks Limited | Time variant filter implementation |
KR20050044494A (en) | 2001-11-16 | 2005-05-12 | 텐솔콤 인코포레이티드 | Construction of an interference matrix for a coded signal processing engine |
US6931052B2 (en) * | 2001-11-16 | 2005-08-16 | Nortel Networks Limited | Symbol-directed weighting in parallel interference cancellation |
US7580448B2 (en) * | 2002-10-15 | 2009-08-25 | Tensorcomm, Inc | Method and apparatus for channel amplitude estimation and interference vector construction |
US7260506B2 (en) * | 2001-11-19 | 2007-08-21 | Tensorcomm, Inc. | Orthogonalization and directional filtering |
US7039136B2 (en) * | 2001-11-19 | 2006-05-02 | Tensorcomm, Inc. | Interference cancellation in a signal |
US20050101277A1 (en) * | 2001-11-19 | 2005-05-12 | Narayan Anand P. | Gain control for interference cancellation |
US7430253B2 (en) * | 2002-10-15 | 2008-09-30 | Tensorcomm, Inc | Method and apparatus for interference suppression with efficient matrix inversion in a DS-CDMA system |
US6725017B2 (en) * | 2001-12-05 | 2004-04-20 | Viasat, Inc. | Multi-channel self-interference cancellation method and apparatus for relayed communication |
GB2384664B (en) * | 2002-01-25 | 2004-12-22 | Toshiba Res Europ Ltd | Receiver processing systems |
GB2384665B (en) * | 2002-01-25 | 2004-11-17 | Toshiba Res Europ Ltd | Reciever processing systems |
US7324584B1 (en) | 2002-01-31 | 2008-01-29 | Nortel Networks Limited | Low complexity interference cancellation |
US20040208238A1 (en) * | 2002-06-25 | 2004-10-21 | Thomas John K. | Systems and methods for location estimation in spread spectrum communication systems |
US20040047309A1 (en) * | 2002-09-09 | 2004-03-11 | Kai Barnes | Method and base station for power control in TDMA radio system |
US7808937B2 (en) | 2005-04-07 | 2010-10-05 | Rambus, Inc. | Variable interference cancellation technology for CDMA systems |
US7876810B2 (en) | 2005-04-07 | 2011-01-25 | Rambus Inc. | Soft weighted interference cancellation for CDMA systems |
US8761321B2 (en) * | 2005-04-07 | 2014-06-24 | Iii Holdings 1, Llc | Optimal feedback weighting for soft-decision cancellers |
US7577186B2 (en) * | 2002-09-20 | 2009-08-18 | Tensorcomm, Inc | Interference matrix construction |
US7463609B2 (en) * | 2005-07-29 | 2008-12-09 | Tensorcomm, Inc | Interference cancellation within wireless transceivers |
US7787572B2 (en) | 2005-04-07 | 2010-08-31 | Rambus Inc. | Advanced signal processors for interference cancellation in baseband receivers |
US20050180364A1 (en) * | 2002-09-20 | 2005-08-18 | Vijay Nagarajan | Construction of projection operators for interference cancellation |
US20050123080A1 (en) * | 2002-11-15 | 2005-06-09 | Narayan Anand P. | Systems and methods for serial cancellation |
US8179946B2 (en) | 2003-09-23 | 2012-05-15 | Rambus Inc. | Systems and methods for control of advanced receivers |
US8005128B1 (en) | 2003-09-23 | 2011-08-23 | Rambus Inc. | Methods for estimation and interference cancellation for signal processing |
US7715508B2 (en) | 2005-11-15 | 2010-05-11 | Tensorcomm, Incorporated | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
KR101011942B1 (en) | 2002-09-23 | 2011-01-31 | 램버스 인코포레이티드 | Method and apparatus for selectively applying interference cancellation in spread spectrum systems |
US7653028B2 (en) * | 2002-10-03 | 2010-01-26 | Qualcomm Incorporated | Scheduling techniques for a packet-access network |
WO2004042948A1 (en) * | 2002-10-31 | 2004-05-21 | Tensorcomm, Incorporated | Systems and methods for reducing interference in cdma systems |
WO2004073159A2 (en) * | 2002-11-15 | 2004-08-26 | Tensorcomm, Incorporated | Systems and methods for parallel signal cancellation |
US6996763B2 (en) * | 2003-01-10 | 2006-02-07 | Qualcomm Incorporated | Operation of a forward link acknowledgement channel for the reverse link data |
US8081598B2 (en) | 2003-02-18 | 2011-12-20 | Qualcomm Incorporated | Outer-loop power control for wireless communication systems |
US20040160922A1 (en) * | 2003-02-18 | 2004-08-19 | Sanjiv Nanda | Method and apparatus for controlling data rate of a reverse link in a communication system |
US7286846B2 (en) * | 2003-02-18 | 2007-10-23 | Qualcomm, Incorporated | Systems and methods for performing outer loop power control in wireless communication systems |
US7660282B2 (en) * | 2003-02-18 | 2010-02-09 | Qualcomm Incorporated | Congestion control in a wireless data network |
US8150407B2 (en) | 2003-02-18 | 2012-04-03 | Qualcomm Incorporated | System and method for scheduling transmissions in a wireless communication system |
US8391249B2 (en) | 2003-02-18 | 2013-03-05 | Qualcomm Incorporated | Code division multiplexing commands on a code division multiplexed channel |
US7155236B2 (en) | 2003-02-18 | 2006-12-26 | Qualcomm Incorporated | Scheduled and autonomous transmission and acknowledgement |
US8023950B2 (en) * | 2003-02-18 | 2011-09-20 | Qualcomm Incorporated | Systems and methods for using selectable frame durations in a wireless communication system |
US7505780B2 (en) * | 2003-02-18 | 2009-03-17 | Qualcomm Incorporated | Outer-loop power control for wireless communication systems |
US7386057B2 (en) * | 2003-02-20 | 2008-06-10 | Nec Corporation | Iterative soft interference cancellation and filtering for spectrally efficient high-speed transmission in MIMO systems |
US8705588B2 (en) | 2003-03-06 | 2014-04-22 | Qualcomm Incorporated | Systems and methods for using code space in spread-spectrum communications |
US7313168B2 (en) * | 2003-03-06 | 2007-12-25 | Nokia Corporation | Method and apparatus for receiving a CDMA signal |
US7215930B2 (en) * | 2003-03-06 | 2007-05-08 | Qualcomm, Incorporated | Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication |
JP3751600B2 (en) * | 2003-03-27 | 2006-03-01 | 株式会社東芝 | Receiving apparatus and receiving method |
US8477592B2 (en) | 2003-05-14 | 2013-07-02 | Qualcomm Incorporated | Interference and noise estimation in an OFDM system |
CN100349394C (en) * | 2003-06-18 | 2007-11-14 | 清华大学 | Method for eliminating grouping single interference utilized in asynchronism code division multiple access system |
JP4182345B2 (en) * | 2003-06-26 | 2008-11-19 | 日本電気株式会社 | Interference cancellation unit and multi-user interference canceller |
US8489949B2 (en) * | 2003-08-05 | 2013-07-16 | Qualcomm Incorporated | Combining grant, acknowledgement, and rate control commands |
US7042657B2 (en) * | 2003-08-28 | 2006-05-09 | Board Of Regents The University Of Texas System | Filter for selectively processing optical and other signals |
US7437135B2 (en) | 2003-10-30 | 2008-10-14 | Interdigital Technology Corporation | Joint channel equalizer interference canceller advanced receiver |
US7400692B2 (en) | 2004-01-14 | 2008-07-15 | Interdigital Technology Corporation | Telescoping window based equalization |
US20050169354A1 (en) * | 2004-01-23 | 2005-08-04 | Olson Eric S. | Systems and methods for searching interference canceled data |
US7477710B2 (en) * | 2004-01-23 | 2009-01-13 | Tensorcomm, Inc | Systems and methods for analog to digital conversion with a signal cancellation system of a receiver |
CN100361413C (en) * | 2004-06-03 | 2008-01-09 | 电子科技大学 | De-spread method of direct sequence spread-spectrum signal |
GB2418104B (en) * | 2004-09-09 | 2007-03-28 | Toshiba Res Europ Ltd | An uplink interference cancelling CDMA base station uses the transmission timing of a new mobile station compared with that of other mobile stations |
US20060125689A1 (en) * | 2004-12-10 | 2006-06-15 | Narayan Anand P | Interference cancellation in a receive diversity system |
CN1801682B (en) * | 2004-12-31 | 2010-04-28 | 方正通信技术有限公司 | Anti-interference method in CDMA system |
AU2006200464A1 (en) * | 2005-02-08 | 2006-08-24 | Nec Australia Pty Ltd | Interference cancellation in a spread spectrum receiver |
US20060229051A1 (en) * | 2005-04-07 | 2006-10-12 | Narayan Anand P | Interference selection and cancellation for CDMA communications |
US7711075B2 (en) | 2005-11-15 | 2010-05-04 | Tensorcomm Incorporated | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US7826516B2 (en) | 2005-11-15 | 2010-11-02 | Rambus Inc. | Iterative interference canceller for wireless multiple-access systems with multiple receive antennas |
US7991088B2 (en) | 2005-11-15 | 2011-08-02 | Tommy Guess | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US7702048B2 (en) * | 2005-11-15 | 2010-04-20 | Tensorcomm, Incorporated | Iterative interference cancellation using mixed feedback weights and stabilizing step sizes |
US7623602B2 (en) * | 2005-11-15 | 2009-11-24 | Tensorcomm, Inc. | Iterative interference canceller for wireless multiple-access systems employing closed loop transmit diversity |
US20070110135A1 (en) * | 2005-11-15 | 2007-05-17 | Tommy Guess | Iterative interference cancellation for MIMO-OFDM receivers |
US8493953B1 (en) | 2006-02-14 | 2013-07-23 | L-3 Communications | Method and device for mitigation of multi-user interference in code division multiple access |
US8094699B2 (en) * | 2006-09-14 | 2012-01-10 | American University In Cairo | Methods and systems for demodulating a multiuser signal using channel decoders for a multiple-access communication system |
US9113362B2 (en) * | 2006-12-12 | 2015-08-18 | At&T Mobility Ii Llc | Method and apparatus to separate coverage limited and co-channel limited interferences |
US20100003992A1 (en) * | 2008-07-01 | 2010-01-07 | Telefonaktiebolaget L M Ericsson (Publ) | Finding Hidden Cells in a Mobile Communication System |
US8249540B1 (en) | 2008-08-07 | 2012-08-21 | Hypres, Inc. | Two stage radio frequency interference cancellation system and method |
KR100994155B1 (en) | 2008-09-16 | 2010-11-12 | 전자부품연구원 | Apparatus and Method for Elimination of Outband Interference Signal |
JP2011103585A (en) * | 2009-11-11 | 2011-05-26 | Japan Radio Co Ltd | Isolation circuit and wireless receiver |
US8195241B2 (en) * | 2009-12-23 | 2012-06-05 | Northrop Grumman Systems Corporation | High-performance cellular telephone receiver |
EP2636155B1 (en) * | 2010-11-03 | 2017-01-11 | Empire Technology Development LLC | Collaborative data sharing for cdma interference subtraction |
US9596055B2 (en) | 2014-07-15 | 2017-03-14 | The American University In Cairo | Methods, systems, and computer readable media for simplified computation of squares and sums of squares of code cross-correlation metrics for signal processing |
CN104111465B (en) * | 2014-07-29 | 2017-06-13 | 上海北伽导航科技有限公司 | The estimator of continuous wave CO_2 laser signal, method of estimation, arrester and removing method |
KR101687683B1 (en) | 2014-09-05 | 2016-12-19 | 주식회사 엘지화학 | Copolycarbonate and composition comprising the same |
US9578469B2 (en) | 2014-10-02 | 2017-02-21 | Motorola Solutions, Inc. | Method and system for direct mode communication within a talkgroup |
KR101685665B1 (en) | 2014-12-04 | 2016-12-12 | 주식회사 엘지화학 | Copolycarbonate and composition comprising the same |
KR20160067714A (en) | 2014-12-04 | 2016-06-14 | 주식회사 엘지화학 | Copolycarbonate and article containing the same |
Family Cites Families (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US518619A (en) * | 1894-04-24 | Shoe-buttoner | ||
US470138A (en) * | 1892-03-01 | George botsford | ||
US523586A (en) * | 1894-07-24 | Starting and controlling device for electric motors | ||
US447018A (en) * | 1891-02-24 | Feed-water purifier | ||
US3838076A (en) * | 1973-03-12 | 1974-09-24 | Jefferson Chem Co Inc | Polyurethane foams from partially aminated polyether polyols |
JPS601534B2 (en) | 1977-12-15 | 1985-01-16 | 川崎重工業株式会社 | Ignition method in combustion furnace |
JPS5732107A (en) | 1980-08-05 | 1982-02-20 | Mitsubishi Electric Corp | Power amplifying circuit |
US4470138A (en) * | 1982-11-04 | 1984-09-04 | The United States Of America As Represented By The Secretary Of The Army | Non-orthogonal mobile subscriber multiple access system |
US4901307A (en) * | 1986-10-17 | 1990-02-13 | Qualcomm, Inc. | Spread spectrum multiple access communication system using satellite or terrestrial repeaters |
US4928274A (en) * | 1988-01-19 | 1990-05-22 | Qualcomm, Inc. | Multiplexed address control in a TDM communication system |
US5028887A (en) * | 1989-08-31 | 1991-07-02 | Qualcomm, Inc. | Direct digital synthesizer driven phase lock loop frequency synthesizer with hard limiter |
US5103459B1 (en) * | 1990-06-25 | 1999-07-06 | Qualcomm Inc | System and method for generating signal waveforms in a cdma cellular telephone system |
JPH05509213A (en) * | 1990-07-23 | 1993-12-16 | オムニポイント・コーポレイション | SAWC phase detection method and device |
JP3116121B2 (en) | 1990-07-25 | 2000-12-11 | 充弘 藤原 | Rotary driven scum remover in circular sedimentation basin |
US5099493A (en) * | 1990-08-27 | 1992-03-24 | Zeger-Abrams Incorporated | Multiple signal receiver for direct sequence, code division multiple access, spread spectrum signals |
US5218619A (en) * | 1990-12-17 | 1993-06-08 | Ericsson Ge Mobile Communications Holding, Inc. | CDMA subtractive demodulation |
US5151919A (en) * | 1990-12-17 | 1992-09-29 | Ericsson-Ge Mobile Communications Holding Inc. | Cdma subtractive demodulation |
US5235612A (en) * | 1990-12-21 | 1993-08-10 | Motorola, Inc. | Method and apparatus for cancelling spread-spectrum noise |
US5136612A (en) * | 1990-12-31 | 1992-08-04 | At&T Bell Laboratories | Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system |
US5469452A (en) * | 1991-09-27 | 1995-11-21 | Qualcomm Incorporated | Viterbi decoder bit efficient chainback memory method and decoder incorporating same |
US5237586A (en) * | 1992-03-25 | 1993-08-17 | Ericsson-Ge Mobile Communications Holding, Inc. | Rake receiver with selective ray combining |
EP0569007A2 (en) * | 1992-05-08 | 1993-11-10 | Canon Kabushiki Kaisha | Surface acoustic wave device, and demodulating apparatus and communication system using the surface acoustic wave device |
US5224122A (en) * | 1992-06-29 | 1993-06-29 | Motorola, Inc. | Method and apparatus for canceling spread-spectrum noise |
US5345468A (en) * | 1992-12-16 | 1994-09-06 | At&T Bell Laboratories | Despreading technique for CDMA systems |
US5343494A (en) * | 1993-01-13 | 1994-08-30 | Motorola, Inc. | Code division multiple access (CDMA) inbound messaging system utilizing over-the-air programming |
US5363403A (en) * | 1993-04-22 | 1994-11-08 | Interdigital Technology Corporation | Spread spectrum CDMA subtractive interference canceler and method |
US5553062A (en) * | 1993-04-22 | 1996-09-03 | Interdigital Communication Corporation | Spread spectrum CDMA interference canceler system and method |
GB2279851B (en) * | 1993-07-01 | 1997-10-01 | Roke Manor Research | Threshold cancellation means for use in digital mobile radio networks |
JPH0732107A (en) | 1993-07-23 | 1995-02-03 | Nippon Steel Corp | Method for taking out cast billet in small lot cast slab casting |
JP2600580B2 (en) * | 1993-09-09 | 1997-04-16 | 日本電気株式会社 | Synchronous PN code sequence generation circuit |
US5343496A (en) * | 1993-09-24 | 1994-08-30 | Bell Communications Research, Inc. | Interference suppression in CDMA systems |
US5377225A (en) * | 1993-10-19 | 1994-12-27 | Hughes Aircraft Company | Multiple-access noise rejection filter for a DS-CDMA system |
JP2927657B2 (en) * | 1993-11-05 | 1999-07-28 | ケイディディ株式会社 | Spread spectrum signal demodulator |
KR950035142A (en) * | 1994-03-10 | 1995-12-30 | 가나미야지 준 | Receiver, Base Station Receiver and Mobile Station Receiver |
-
1994
- 1994-07-26 US US08/279,477 patent/US5553062A/en not_active Expired - Lifetime
-
1995
- 1995-07-05 CN CNB021558965A patent/CN1252957C/en not_active Expired - Lifetime
- 1995-07-05 CN CN021558981A patent/CN1503493B/en not_active Expired - Lifetime
- 1995-07-05 CA CA2552443A patent/CA2552443C/en not_active Expired - Lifetime
- 1995-07-05 ES ES95927544T patent/ES2137140T3/en not_active Expired - Lifetime
- 1995-07-05 DK DK00104576T patent/DK1033840T3/en active
- 1995-07-05 CN CNB01123783XA patent/CN1165125C/en not_active Expired - Lifetime
- 1995-07-05 CN CNB021084270A patent/CN1223127C/en not_active Expired - Lifetime
- 1995-07-05 DE DE1033840T patent/DE1033840T1/en active Pending
- 1995-07-05 AT AT07017783T patent/ATE460785T1/en not_active IP Right Cessation
- 1995-07-05 CN CN021558973A patent/CN1501611B/en not_active Expired - Lifetime
- 1995-07-05 BR BRPI9510804-1A patent/BR9510804B1/en not_active IP Right Cessation
- 1995-07-05 AT AT00104576T patent/ATE373355T1/en not_active IP Right Cessation
- 1995-07-05 CA CA002195534A patent/CA2195534C/en not_active Expired - Lifetime
- 1995-07-05 BR BR9508348A patent/BR9508348A/en not_active IP Right Cessation
- 1995-07-05 SE SE0702343A patent/SE532856C2/en not_active IP Right Cessation
- 1995-07-05 CA CA002342454A patent/CA2342454C/en not_active Expired - Lifetime
- 1995-07-05 NZ NZ314383A patent/NZ314383A/en not_active IP Right Cessation
- 1995-07-05 EP EP95927544A patent/EP0772928B1/en not_active Expired - Lifetime
- 1995-07-05 DE DE0772928T patent/DE772928T1/en active Pending
- 1995-07-05 DK DK95927544T patent/DK0772928T3/en active
- 1995-07-05 DE DE69535594T patent/DE69535594T2/en not_active Expired - Lifetime
- 1995-07-05 AU AU31541/95A patent/AU701816B2/en not_active Expired
- 1995-07-05 EP EP00104576A patent/EP1033840B1/en not_active Expired - Lifetime
- 1995-07-05 EP EP07017783A patent/EP1860811B1/en not_active Expired - Lifetime
- 1995-07-05 CN CNB021084262A patent/CN1229935C/en not_active Expired - Lifetime
- 1995-07-05 DE DE69536056T patent/DE69536056D1/en not_active Expired - Lifetime
- 1995-07-05 ES ES00104576T patent/ES2151461T3/en not_active Expired - Lifetime
- 1995-07-05 NZ NZ290723A patent/NZ290723A/en not_active IP Right Cessation
- 1995-07-05 ES ES07017783T patent/ES2342903T3/en not_active Expired - Lifetime
- 1995-07-05 JP JP50599296A patent/JP3153894B2/en not_active Expired - Lifetime
- 1995-07-05 AT AT95927544T patent/ATE224618T1/en not_active IP Right Cessation
- 1995-07-05 CA CA002369499A patent/CA2369499C/en not_active Expired - Lifetime
- 1995-07-05 CN CN95194367A patent/CN1097368C/en not_active Expired - Lifetime
- 1995-07-05 DK DK07017783.7T patent/DK1860811T3/en active
- 1995-07-05 WO PCT/US1995/009652 patent/WO1996003819A1/en active IP Right Grant
- 1995-07-05 DE DE69528275T patent/DE69528275T2/en not_active Expired - Lifetime
- 1995-07-05 DE DE19581709T patent/DE19581709T1/en not_active Withdrawn
-
1996
- 1996-05-29 US US08/654,994 patent/US5719852A/en not_active Expired - Lifetime
-
1997
- 1997-01-23 SE SE9700184A patent/SE521137C2/en not_active IP Right Cessation
- 1997-01-23 FI FI970276A patent/FI115430B/en not_active IP Right Cessation
- 1997-01-24 DK DK199700089A patent/DK176193B1/en not_active IP Right Cessation
- 1997-09-29 US US08/939,146 patent/US6014373A/en not_active Expired - Lifetime
-
1999
- 1999-03-25 US US09/276,019 patent/US6259688B1/en not_active Expired - Lifetime
-
2000
- 2000-06-22 JP JP2000188314A patent/JP3377983B2/en not_active Expired - Lifetime
-
2001
- 2001-02-28 HK HK01101484A patent/HK1030697A1/en not_active IP Right Cessation
- 2001-05-09 US US09/851,740 patent/US6868076B2/en not_active Expired - Fee Related
-
2002
- 2002-03-29 CN CNB021084289A patent/CN1228937C/en not_active Expired - Lifetime
- 2002-06-06 US US10/163,790 patent/US7161919B2/en not_active Expired - Fee Related
- 2002-06-06 US US10/164,209 patent/US7167462B2/en not_active Expired - Fee Related
- 2002-06-06 US US10/163,815 patent/US7167464B2/en not_active Expired - Fee Related
- 2002-06-06 US US10/163,648 patent/US7164668B2/en not_active Expired - Fee Related
- 2002-07-24 US US10/201,797 patent/US7242675B2/en not_active Expired - Fee Related
- 2002-07-24 US US10/202,179 patent/US6868078B2/en not_active Expired - Fee Related
- 2002-07-24 US US10/202,129 patent/US6876665B2/en not_active Expired - Fee Related
- 2002-07-24 US US10/202,226 patent/US7230938B2/en not_active Expired - Fee Related
-
2003
- 2003-04-08 HK HK03102489A patent/HK1050966A1/en not_active IP Right Cessation
- 2003-04-08 HK HK03102488A patent/HK1050965A1/en not_active IP Right Cessation
- 2003-04-08 HK HK03102490A patent/HK1050967A1/en not_active IP Right Cessation
- 2003-07-21 SE SE0302105A patent/SE527579C2/en not_active IP Right Cessation
-
2004
- 2004-10-12 HK HK04107844A patent/HK1065190A1/en not_active IP Right Cessation
- 2004-11-26 HK HK04109358.3A patent/HK1066657A1/en not_active IP Right Cessation
- 2004-12-08 HK HK04109708.0A patent/HK1066945A1/en not_active IP Right Cessation
-
2005
- 2005-03-01 FI FI20050232A patent/FI117612B/en not_active IP Right Cessation
- 2005-03-14 US US11/079,364 patent/US7027423B2/en not_active Expired - Fee Related
- 2005-12-15 SE SE0502763A patent/SE528965C2/en not_active IP Right Cessation
-
2007
- 2007-02-01 SE SE0700241A patent/SE532857C2/en not_active IP Right Cessation
- 2007-03-19 DK DK200700410A patent/DK176636B1/en not_active IP Right Cessation
- 2007-03-19 DK DK200700411A patent/DK176802B1/en not_active IP Right Cessation
- 2007-07-03 US US11/824,856 patent/US20070258412A1/en not_active Abandoned
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007112585A1 (en) * | 2006-04-05 | 2007-10-11 | Research In Motion Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
US7672412B2 (en) | 2006-04-05 | 2010-03-02 | Research In Motion Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
US7970078B2 (en) * | 2006-04-05 | 2011-06-28 | Research In Motion Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
US8184744B2 (en) | 2006-04-05 | 2012-05-22 | Research In Motion Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
US8842776B2 (en) | 2006-04-05 | 2014-09-23 | Blackberry Limited | Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2552443A1 (en) | Multichannel cdma subtractive interference canceler | |
EP0876001A3 (en) | Partial decorrelation for a coherent multicode code division multiple access receiver | |
HK1019025A1 (en) | Direct sequence- code division multiple access receiver with multiuser interference canceller. | |
ZA9710253B (en) | Despreading of direct sequence spread spectrum communications signals. | |
HK1014312A1 (en) | Calling channel in cdma mobile communications system | |
EP0593289A3 (en) | Frequency hopping spread spectrum data communications system. | |
EP0813314A3 (en) | Direct-sequence code division multiple access receiver | |
CA2137515A1 (en) | Mobile Communication System Capable of Transmitting and Receiving a Radio Signal Obtained by TDMA and CDMA Without Interference | |
EP0967734A3 (en) | Multiuser interference canceler for DS-cdma system | |
AU6401596A (en) | Code division multiple access (cdma) communication system | |
CA2616764A1 (en) | Adaptive power control for a spread spectrum communications system and method | |
EP0599391A3 (en) | Spread spectrum communication system. | |
CA2097692A1 (en) | Method and apparatus for cancelling spread-spectrum noise | |
CA2127616A1 (en) | Mobile Communication Unit | |
AU7898291A (en) | Radio communication system using spread spectrum techniques | |
HUT64655A (en) | Communication system especially cdma microcellular telephone system | |
EP0798873A3 (en) | Subtractive multi-user interference cancellation in a CDMA communications system | |
IL118665A0 (en) | Mobile demodulator architecture for a spread spectrum multiple access communication system | |
AU8114094A (en) | Multi-path resistant frequency-hopped spread spectrum mobile location system | |
GB2337419B (en) | DS-CDMA multi-user interference canceller and DS-CDMA communication system | |
CA2100847A1 (en) | Precoding of Signature Sequences for CDMA Systems | |
GB2314999B (en) | Transceiver operating in time division full duplex spread spectrum communication | |
GB2333667B (en) | Circuit for eliminating external interference signals in code division multiple access mobile phone | |
CA2288633A1 (en) | An interference canceller for the protection of direct-sequence spread-spectrum communications from high-power narrowband interference | |
AUPO030296A0 (en) | Ds-cdma system for wireless digital communication channels |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150706 |