WO2003028233A1 - Communication system receiver and method for concurrent receiving of multiple channels - Google Patents
Communication system receiver and method for concurrent receiving of multiple channels Download PDFInfo
- Publication number
- WO2003028233A1 WO2003028233A1 PCT/US2002/030386 US0230386W WO03028233A1 WO 2003028233 A1 WO2003028233 A1 WO 2003028233A1 US 0230386 W US0230386 W US 0230386W WO 03028233 A1 WO03028233 A1 WO 03028233A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- received samples
- receiver
- processing
- recited
- Prior art date
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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- 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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
- H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3805—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving with built-in auxiliary receivers
Definitions
- the present invention relates generally to the field of communications, and more particularly, to communications in a cellular communication system.
- a communication system may provide communication services that include wireless radio transmission of digitized speech, still or moving images, text messages, position location determination and other types of data. Such communication services may be provided to a type of devices that are mobile, such as a cellular phone, a portable computer, etc.
- a communication system through a collection of commonly known cell sites provide the communication services without interruption over a broad range of areas to a mobile station. Each cell site may include a base transceiver station and control units. One cell site may have more than one base transceiver stations. Each base transceiver station provides the radio frequency link over a limited geographical area. When a mobile station moves from a location to another, the mobile station may go through a handed off process that allows providing the communication services without interruption.
- the handoff may be accomplished through a soft hand off or a hard handoff or both.
- soft handoff the mobile station receives essentially identical traffic channel data from at least two base transceiver stations over a common carrier frequency.
- the base transceiver stations involved in the soft handoff process may be located in two different cell sites or the same cell site.
- hard handoff the resources in a current base station transceiver are released while new communication resources in a new base station are allocated to the user.
- the carrier frequency of the current base station may be different than the carrier frequency of the new base station. As such, generally, hard handoff occurs between cell sites that are operating over two different frequencies. Inter-frequency hard handoff can also take place between two frequency assignments in the same cell or same sector.
- the process for the hard handoff may be preceded by a search for possible hard handoff candidates including pilot signals belonging to the candidate frequencies.
- the search may be performed by the mobile station at any time including the time when the mobile station is moving from one cell site to another.
- the mobile station may need to search for possible hard handoff candidates while maintaining a traffic call with a base station.
- the receiver portion of the mobile station may need to be tuned to different frequencies for finding a new hard handoff candidate.
- the mobile station may have only one receiver portion. Therefore, during the search time, the traffic of data on the traffic channel between the current base station and the mobile station may be disrupted or the mobile station may mute the incoming voice information. As such, there may be a substantial delay in delivery of data or suspension of voice traffic data during the search period.
- a single receiver is not capable to maintain two-way communications and global positioning system (GPS) reception for position location determination.
- GPS global positioning system
- a method and apparatus in a communication system provide for concurrent processings of signals at the different frequencies.
- a received signal is down converted in a RF/IF system to produce on-channel and out-of- channel received samples.
- the on-channel received samples are processed in a back-end portion to decode on-channel information.
- the out-of-channel received samples are processed to determine at least one of a link quality and global positioning system originated information in the back-end portion.
- the processings of the on-channel received samples and the out-of-channel received samples are performed essentially at the same time by the receiver back-end.
- FIG. 1 illustrates a communication system capable of incorporating various embodiments of the invention
- FIG. 2 illustrates a communication system receiver for receiving and decoding received data in accordance with various aspects of the invention
- FIG. 3 illustrates a communication system receiver RF/IF system for down converting a received signal to base band frequencies in accordance with various embodiments of the invention
- FIG. 4 illustrates a graph of the down converted received signal frequencies presented to a back-end base band processing unit in accordance with various aspects of the invention.
- Various embodiments of the invention may be incorporated in a wireless communication system operating in accordance with the code division multiple access (CDMA) technique which has been disclosed and described in various standards published by the Telecommunication Industry Association (TIA) and other standards organizations.
- CDMA code division multiple access
- TIA/EIA-95 standard TIA/EIA-IS-2000 standard
- IMT-2000 standard IMT-2000 standard
- UMTS UMTS
- WCDMA Wideband Code Division Multiple Access
- a system for communication of data is also detailed in the "TIA/EIA/IS-856 cdma2000 High Rate Packet Data Air Interface Specification," incorporated by reference herein.
- a copy of the standards may be obtained by accessing the world wide web at the address: http://www.3qpp2.org. or by writing to TIA, Standards and Technology Department, 2500 Wilson Boulevard, Arlington, VA 22201, United States of America.
- the standard generally identified as UMTS standard, incorporated by reference herein, may be obtained by contacting 3GPP
- a novel and improved receiver and a method provide for efficient processing of received signals in a CDMA communication system.
- the efficient processing allows providing the communication services to a mobile user without interruption when the mobile station is searching for the hard handoff frequency candidates.
- Hard handoff between two cell sites or two sectors may be necessary for mobility management.
- the hard handoff within one sector or one omni-sector cell may be for resource management.
- One carrier frequency may be over-utilized by a number of mobile users while the other frequency is under-utilized.
- the base station in communication with the mobile station may request a periodic search of the other frequencies.
- the mobile station may perform the search without suspending the communication of traffic of data in an ongoing communication call in accordance with various embodiments of the invention.
- One or more exemplary embodiments described herein are set forth in the context of a digital wireless data communication system. While use within this context is advantageous, different embodiments of the invention may be incorporated in different environments or configurations.
- the various systems described herein may be formed using software-controlled processors, integrated circuits, or discrete logic.
- the data, instructions, commands, information, signals, symbols, and chips that may be referenced throughout the application are advantageously represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or a combination thereof.
- the blocks shown in each block diagram may represent hardware or method steps.
- FIG. 1 illustrates a block diagram of a communication system 100 incorporating various embodiments of the invention while operating in compliance with any of the code division multiple access (CDMA) communication system standards.
- Communication system 100 may be for communications of voice, data or both.
- communication system 100 includes a base station 101 that provides communication links between a number of mobile stations, such as mobile stations 102-104, and between the mobile stations 102-104 and a public switch telephone and data network 105.
- the mobile stations in FIG. 1 may be referred to as data access terminals and the base station as data access network without departing from the main scope and various advantages of the invention.
- Base station 101 may include a number of components, such as a base station controller and a base transceiver system. For simplicity, such components are not shown.
- a mobile switching center may control various operating aspects of the communication system 100 and in relation to a back-haul 199 between network 105 and base station 101.
- a base station 160 may also be connected to the back-haul 199 for providing communication services in another coverage area.
- Base station 101 communicates with each mobile station that is in its coverage area via a forward link signal transmitted from base station 101.
- the forward link signals targeted for mobile stations 102-104 may be summed to form a forward link signal 106.
- Each of the mobile stations 102-104 receiving forward link signal 106 decodes the forward link signal 106 to extract the information that is targeted for its user.
- Base station 160 may also communicate with the mobile stations that are in its coverage area via a forward link signal transmitted from base station 160.
- Mobile stations 102-104 communicate with base stations 101 and 160 via corresponding reverse links.
- Each reverse link is maintained by a reverse link signal, such as reverse link signals 107-109 for respectively mobile stations 102-104.
- Base station 101 and base station 160 may be operating over two different frequencies.
- a candidate base station operating on a different carrier frequency needs to be identified. The selection may be based on several factors including a link quality with the new base station.
- the mobile station 102 tunes its receiver to the frequency of the possible base station candidates and measures the link quality. The selection of candidate may be based on the level of the link quality.
- a receiver may tune to one frequency, such as the on-channel frequency, and produce on-channel and out-of-channel signals to find possible pilot candidates for the hard handoff process.
- the link quality measurements may include the received signal strength, received signal-to-noise ratio or other parameters.
- the link quality measurement is reported to the base station 101. If the base station 160 is selected as the hard handoff candidate, the base station
- FIG. 2 illustrates a block diagram of a receiver 400 used for processing and demodulating the received CDMA signal in accordance with various embodiments of the invention.
- Received (Rx) samples may be stored in RAM
- Received samples are generated by a radio frequency/intermediate frequency (RF/IF) system 490 and an antenna system 492.
- RF/IF radio frequency/intermediate frequency
- the received RF signals are filtered, down-converted and digitized to form RX samples at base band frequencies.
- the samples are provided to a back-end processing block 499.
- the samples are supplied to a demultiplexer (demux) 402.
- the RF/IF system 490 may produce at least two sets of received samples in accordance with various embodiments of the invention.
- One set for the on-channel communications and another set for out-of-channel communications.
- the on-channel communications include the traffic channel between the base station and the mobile station.
- the out-of-channel samples are digitally filtered and are used to search for the hard handoff candidate frequencies.
- the out-of-channel received samples may also include information about the GPS received signals for determining the mobile station position.
- the on-channel and out- of-channel samples are produced essentially at the same time in accordance with various embodiments of the invention. 1018]
- the on-channel and out-of-channel samples may be stored in RAM
- demux 402. The output of demux 402 is supplied to a searcher unit 406 and finger elements 408.
- a control unit 410 is coupled thereto.
- a combiner 412 couples a decoder 414 to finger elements 408.
- Control unit 410 may be a microprocessor controlled by software, and may be located on the same integrated circuit or on a separate integrated circuit.
- the decoding function in decoder 414 may be in accordance with a Viterbi algorithm or a turbo decoder. 1019] In an embodiment, both the On-channel and out-of-channel signals are processed in parallel and in real time. During operation, the received on- channel and out-of channel samples are supplied to demux 402.
- Demux 402 supplies the on-channel and out-of-channel samples to searcher unit 406 and finger elements 408.
- Control unit 410 configures finger elements 408 to perform demodulation of the received on-channel samples at different time offsets based on search results from searcher unit 406.
- the results of the demodulation are combined and passed to decoder 414.
- Decoder 414 decodes the data and outputs the on-channel decoded data.
- Despreading of the channels is performed by multiplying the received samples with the complex conjugate of the PN sequence and assigned Walsh function at a single timing hypothesis and digitally filtering the resulting samples, often with an integrate and dump accumulator circuit (not shown). Such a technique is commonly known in the art.
- Base station 101 may be the base station having a traffic channel communication with the mobile station, and the base station 160 may be a hard handoff candidate base station. Base station 101 may provide coverage in one cell site over one carrier frequency and base station 160 in another cell over another carrier frequency.
- cell site is a general term used to describe a collection of hardware and related software embedded therein for providing communication services over a limited geographical area.
- a cell site may be divided into two or more sectors, where each sector may have a collection of hardware and related software embedded therein for providing communication services over a limited geographical area. Two or more sectors may make up a cell site. Therefore, the terms cell site and sector used herein may be interchangeable without departing from the advantages of the invention.
- the base stations 101 and 160 while operating over two different frequencies, may be providing coverage for a common sector, or a common cell site, or two sectors of a common cell site, or one sector of a cell site and one sector of another cell site, or one sector of a cell site and an omni sector cell site.
- the RF/IF system 490 produces the on-channel and out-of-channel received samples in accordance with various embodiments of the invention.
- RF/IF system 490 may include a low noise amplifier 301 for amplifying the received signal from antenna 492 in accordance with various embodiments of the invention.
- the received signal is passed to a down converter 302.
- a frequency source 303 such as a voltage-controlled oscillator, may provide a signal at the on-channel carrier frequency for down converting the on-channel signal to the base band frequency.
- the resulting signal is passed through a low pass filter 304 for filtering the out-of- channel signals and producing an on-channel received samples 305.
- the down converted signal is also passed through a processor 307.
- Processor 307 isolates, for searching pilots of the candidate frequencies, the out-of channel received samples 306.
- Processor 307 performs the operation in accordance with a commonly known Digital Signal Processing (DSP) or any other commonly known methods.
- DSP Digital Signal Processing
- a DSP processor allows isolating a specific portion of a frequency band by digitally filtering other portions.
- Receiver 400 in accordance with an embodiment includes a number of fingers 408.
- the on-channel and out-of- channel samples 305 and 306 are supplied to the searcher unit 406 and finger elements 408. While the finger elements 408 are processing the on-channel samples for demodulation and the decoding operation in decoder 414, the searcher unit 406 and possibly in combination with at least one of the fingers 408 may determine the quality of the out-of channel samples.
- the quality measure may be limited to measuring the signal strength and signal-to-noise ratio or other parameters of the out-of-channel received samples.
- the base station that originated the signal may be a possible candidate for hard handoff operation with the mobile station.
- the control system 410 may control passing the on-channel and out- of channel samples 305, 306 to respective fingers 408 and searcher 406 by controlling demux 402.
- the processing of the out-of channel samples may be limited to the processing of the pilot channel information transmitted from the candidate base stations. Therefore, the on-channel and out-of-channel received samples may be processed at the same time in accordance with various embodiments of the invention. 1022] Referring to FIG. 4, a graphical representation of the on-channel and out of channel frequency spectrum 450 at the output of down converter 302 is shown.
- the input signal of down converter 302 may contain pilot signals at different frequencies from different base stations and GPS originated signal as well as the traffic channel signals.
- the received signal may be mathematically represented as:
- the low pass filter 304 filters the high frequency components 452 shown in graph 450.
- the low-pass filtered version 451 of the signal may have the representation as following:
- the filtered version 451 of the received signal may be represented as the on-channel received samples.
- the processor 307 may be using digital band pass filtering and is able to separate the out-of channel desired candidate frequencies and GPS originated signals from the high frequency components 452.
- the high frequency components contain the out-of channel signals for searching pilots on the candidate frequencies as well as the GPS signal components in accordance with an embodiment.
- the receiver 400 while incorporating various aspects of the RF/IF system 490 as shown in and described in relation to FIG. 3 is able to process and maintain a traffic channel communication while the receiver is examining different candidate frequencies and receive GPS originated signals.
- Various embodiments of the invention thus, provide an efficient receiver and an accompanying method for providing uninterrupted communication services in a communication system while the receiver is searching for hard handoff candidate frequencies and/or receiving GPS originated signal.
- a receiver may be used to search GPS frequency band while in two-way communication with cellular or PCS systems.
- the results of the search may be used to determine the location of the wireless device without interrupting the ongoing communication channel.
- Those of skill in the art would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both.
- the various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- the general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
- a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
- the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination.
- a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD- ROM, or any other form of storage medium known in the art.
- An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
- the storage medium may be integral to the processor.
- the processor and the storage medium may reside in an ASIC.
- the ASIC may reside in a user terminal.
- the processor and the storage medium may reside as discrete components in a user terminal. 1029]
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003531628A JP4242282B2 (en) | 2001-09-27 | 2002-09-24 | Communication system receiver and method for simultaneous reception of multiple channels |
EP02773568A EP1430610B1 (en) | 2001-09-27 | 2002-09-24 | Communication system receiver and method for concurrent receiving of multiple channels |
DE60227391T DE60227391D1 (en) | 2001-09-27 | 2002-09-24 | COMMUNICATION SYSTEM RECEIVER AND METHOD FOR SIMULTANEOUS RECEIVING OF MULTIPLE CHANNELS |
KR1020047004464A KR100882034B1 (en) | 2001-09-27 | 2002-09-24 | Communication system receiver and method for concurrent receiving of multiple channels |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/965,341 | 2001-09-27 | ||
US09/965,341 US7729698B2 (en) | 2001-09-27 | 2001-09-27 | Communication system receiver and method for concurrent receiving of multiple channels |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003028233A1 true WO2003028233A1 (en) | 2003-04-03 |
Family
ID=25509830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/030386 WO2003028233A1 (en) | 2001-09-27 | 2002-09-24 | Communication system receiver and method for concurrent receiving of multiple channels |
Country Status (9)
Country | Link |
---|---|
US (3) | US7729698B2 (en) |
EP (1) | EP1430610B1 (en) |
JP (1) | JP4242282B2 (en) |
KR (1) | KR100882034B1 (en) |
CN (2) | CN100438357C (en) |
AT (1) | ATE400090T1 (en) |
DE (1) | DE60227391D1 (en) |
TW (1) | TW583885B (en) |
WO (1) | WO2003028233A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050141895A1 (en) * | 2003-12-31 | 2005-06-30 | Ruiz Everardo D. | Isolating radio frequency components of a wireless device |
US9602144B2 (en) * | 2004-08-26 | 2017-03-21 | Interdigital Technology Corporation | Method and apparatus for processing multiple wireless communication services |
US20060045126A1 (en) * | 2004-08-30 | 2006-03-02 | Interdigital Technology Corporation | Method and apparatus for adaptively selecting sampling frequency for analog-to-digital conversion |
US7512110B2 (en) * | 2004-09-21 | 2009-03-31 | Motorola, Inc. | Method and apparatus to facilitate inter-AN HRPD hard handoff |
US7489929B2 (en) * | 2005-03-31 | 2009-02-10 | Alcatel-Lucent Usa Inc. | Hard handoff procedure for dedicated and high speed shared channels |
KR101353058B1 (en) * | 2007-02-12 | 2014-01-17 | 삼성전자주식회사 | Method and Apparatus for Handoff Control by Using Multi-In Multi-Out in WLAN |
US8478218B2 (en) * | 2008-06-11 | 2013-07-02 | Quintic Holdings | Frequency modulation (FM) clear channel scanning system and method of using same |
JP5111661B2 (en) * | 2009-05-21 | 2013-01-09 | 三菱電機株式会社 | Communication control method and radio base station |
CN101938687B (en) * | 2009-07-01 | 2015-06-17 | 北京神州天鸿科技有限公司 | Beidou communication terminal equipment with wireless communication function and method thereof |
US10128879B2 (en) * | 2014-03-31 | 2018-11-13 | Intel IP Corporation | Enhanced receive sensitivity for concurrent communications |
US10129853B2 (en) * | 2016-06-08 | 2018-11-13 | Cognitive Systems Corp. | Operating a motion detection channel in a wireless communication network |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5357544A (en) * | 1992-07-21 | 1994-10-18 | Texas Instruments, Incorporated | Devices, systems, and methods for composite signal decoding |
WO1998019491A2 (en) * | 1996-10-28 | 1998-05-07 | Ericsson Inc. | Mobile assisted handoff in radiocommunication systems |
US5854785A (en) * | 1996-12-19 | 1998-12-29 | Motorola, Inc. | System method and wireless communication device for soft handoff |
US6011785A (en) * | 1994-06-01 | 2000-01-04 | Airnet Communications Corporation | Wideband wireless base-station making use of time division multiple-access bus to effect switchable connections to modulator/demodulator resources |
WO2000051376A1 (en) * | 1999-02-26 | 2000-08-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement in a radio receiver system with several standards |
WO2001059938A2 (en) * | 2000-02-12 | 2001-08-16 | Qualcomm Incorporated | Multiple band wireless telephone with multiple antennas |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4282401A (en) * | 1970-12-24 | 1981-08-04 | Sansui Electric Company | System for transmission and reception of discrete four channel stereo |
US3718767A (en) * | 1971-05-20 | 1973-02-27 | Itt | Multiplex out-of-band signaling system |
US5485517A (en) * | 1993-12-07 | 1996-01-16 | Gray; Robert R. | Portable wireless telephone having swivel chassis |
JP3700200B2 (en) * | 1995-06-05 | 2005-09-28 | ソニー株式会社 | Portable telephone equipment |
US5799005A (en) * | 1996-04-30 | 1998-08-25 | Qualcomm Incorporated | System and method for determining received pilot power and path loss in a CDMA communication system |
US6073033A (en) * | 1996-11-01 | 2000-06-06 | Telxon Corporation | Portable telephone with integrated heads-up display and data terminal functions |
JP3019013B2 (en) * | 1996-11-21 | 2000-03-13 | 日本電気株式会社 | Portable communication device |
JPH10165013A (en) | 1996-12-09 | 1998-06-23 | Nippon Chiko Co Ltd | Transplanting device and method for constructing the same |
JPH10178672A (en) | 1996-12-18 | 1998-06-30 | Fujitsu Ltd | Receiver adaptive to cdma system |
US6009129A (en) * | 1997-02-28 | 1999-12-28 | Nokia Mobile Phones | Device and method for detection and reduction of intermodulation distortion |
US6240302B1 (en) * | 1998-05-29 | 2001-05-29 | 3Com Corporation | Wireless phone with removable personal information manager |
US6188900B1 (en) | 1998-08-31 | 2001-02-13 | Texas Instruments Incorporated | Mobile device assisted handoff system for code division multiple access and wideband code division multiple access networks |
US6321090B1 (en) * | 1998-11-06 | 2001-11-20 | Samir S. Soliman | Mobile communication system with position detection to facilitate hard handoff |
CA2316440A1 (en) | 1999-08-31 | 2001-02-28 | Lucent Technologies Inc. | System for performing handoffs using location information for a wireless unit |
JP2001103568A (en) * | 1999-09-30 | 2001-04-13 | Toshiba Corp | Communication system, mobile communication unit used by this communication system, mobile information processing unit and data communication method |
US6549789B1 (en) * | 2000-04-28 | 2003-04-15 | Motorola Inc. | Portable electronic device with an adaptable user interface |
US6865376B2 (en) * | 2001-07-03 | 2005-03-08 | Kyocera Wireless Corp. | System and method for a GPS enabled antenna |
-
2001
- 2001-09-27 US US09/965,341 patent/US7729698B2/en not_active Expired - Fee Related
-
2002
- 2002-09-24 CN CNB028225589A patent/CN100438357C/en not_active Expired - Fee Related
- 2002-09-24 CN CNA2008101665100A patent/CN101373987A/en active Pending
- 2002-09-24 WO PCT/US2002/030386 patent/WO2003028233A1/en active Application Filing
- 2002-09-24 DE DE60227391T patent/DE60227391D1/en not_active Expired - Lifetime
- 2002-09-24 EP EP02773568A patent/EP1430610B1/en not_active Expired - Lifetime
- 2002-09-24 JP JP2003531628A patent/JP4242282B2/en not_active Expired - Fee Related
- 2002-09-24 KR KR1020047004464A patent/KR100882034B1/en not_active IP Right Cessation
- 2002-09-24 AT AT02773568T patent/ATE400090T1/en not_active IP Right Cessation
- 2002-09-27 TW TW091122337A patent/TW583885B/en not_active IP Right Cessation
-
2004
- 2004-04-22 US US10/830,906 patent/US7706795B2/en not_active Expired - Fee Related
-
2010
- 2010-05-28 US US12/789,854 patent/US20100248724A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5357544A (en) * | 1992-07-21 | 1994-10-18 | Texas Instruments, Incorporated | Devices, systems, and methods for composite signal decoding |
US6011785A (en) * | 1994-06-01 | 2000-01-04 | Airnet Communications Corporation | Wideband wireless base-station making use of time division multiple-access bus to effect switchable connections to modulator/demodulator resources |
WO1998019491A2 (en) * | 1996-10-28 | 1998-05-07 | Ericsson Inc. | Mobile assisted handoff in radiocommunication systems |
US5854785A (en) * | 1996-12-19 | 1998-12-29 | Motorola, Inc. | System method and wireless communication device for soft handoff |
WO2000051376A1 (en) * | 1999-02-26 | 2000-08-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement in a radio receiver system with several standards |
WO2001059938A2 (en) * | 2000-02-12 | 2001-08-16 | Qualcomm Incorporated | Multiple band wireless telephone with multiple antennas |
Non-Patent Citations (1)
Title |
---|
SALKINTZIS A K ET AL: "ADC AND DSP CHALLENGES IN THE DEVELOPMENT OF SOFTWARE RADIO BASE STATIONS", IEEE PERSONAL COMMUNICATIONS, IEEE COMMUNICATIONS SOCIETY, US, vol. 6, no. 4, August 1999 (1999-08-01), pages 47 - 55, XP000849383, ISSN: 1070-9916 * |
Also Published As
Publication number | Publication date |
---|---|
CN1586045A (en) | 2005-02-23 |
US20100248724A1 (en) | 2010-09-30 |
EP1430610B1 (en) | 2008-07-02 |
US20040198440A1 (en) | 2004-10-07 |
ATE400090T1 (en) | 2008-07-15 |
DE60227391D1 (en) | 2008-08-14 |
KR100882034B1 (en) | 2009-02-09 |
EP1430610A1 (en) | 2004-06-23 |
US7729698B2 (en) | 2010-06-01 |
JP4242282B2 (en) | 2009-03-25 |
KR20040045001A (en) | 2004-05-31 |
US20030060230A1 (en) | 2003-03-27 |
CN100438357C (en) | 2008-11-26 |
TW583885B (en) | 2004-04-11 |
JP2005505164A (en) | 2005-02-17 |
US7706795B2 (en) | 2010-04-27 |
CN101373987A (en) | 2009-02-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20100248724A1 (en) | Communication System Receiver and Method for Concurrent Receiving of Multiple Channels | |
US7245600B2 (en) | Method and apparatus for determining reverse link load level for reverse link data scheduling in a CDMA communication system | |
KR100793298B1 (en) | Method for selecting reception mode of dual receiver-based mobile terminal | |
CA2472587C (en) | Method and apparatus for controlling communications of data from multiple base stations to a mobile station in a communication system | |
US20030058822A1 (en) | Method and apparatus for communications of data rate control information in a CDMA communication system | |
JP2002521937A (en) | Resource allocation method and allocation system | |
EP1010345B1 (en) | Mobile assisted handoff (MAHO) in radiocommunications systems | |
KR100782314B1 (en) | Efficient system and method for facilitating quick paging channel demodulation via an efficient offline searcher in a wireless communications system | |
US6831906B2 (en) | Method and apparatus for efficient use of communication resources in a CDMA communication system | |
US6665284B1 (en) | Apparatus, and associated method, for receiving data at a radio device | |
US20030060200A1 (en) | Handoff method and apparatus with dual pilots in a communication system | |
EP1303068A1 (en) | Radio communication terminal and demodulation method | |
CN1605162A (en) | Data transmission method and receiver |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ OM PH PL PT RU SD SE SG SI SK SL TJ TM TN TR TZ UA UG UZ VC VN YU ZA ZM |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2002773568 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 644/CHENP/2004 Country of ref document: IN Ref document number: 1020047004464 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003531628 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20028225589 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2002773568 Country of ref document: EP |