CA2316263A1 - Channel spreading device and method in cdma communication system - Google Patents

Channel spreading device and method in cdma communication system Download PDF

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Publication number
CA2316263A1
CA2316263A1 CA002316263A CA2316263A CA2316263A1 CA 2316263 A1 CA2316263 A1 CA 2316263A1 CA 002316263 A CA002316263 A CA 002316263A CA 2316263 A CA2316263 A CA 2316263A CA 2316263 A1 CA2316263 A1 CA 2316263A1
Authority
CA
Canada
Prior art keywords
spreading
orthogonally
code
channels
base station
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
Application number
CA002316263A
Other languages
French (fr)
Other versions
CA2316263C (en
Inventor
Jae-Yoel Kim
Hee-Won Kang
Seung-Joo Maeng
Young-Ky Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Jae-Yoel Kim
Hee-Won Kang
Seung-Joo Maeng
Young-Ky Kim
Samsung Electronics Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jae-Yoel Kim, Hee-Won Kang, Seung-Joo Maeng, Young-Ky Kim, Samsung Electronics Co., Ltd. filed Critical Jae-Yoel Kim
Publication of CA2316263A1 publication Critical patent/CA2316263A1/en
Application granted granted Critical
Publication of CA2316263C publication Critical patent/CA2316263C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation

Abstract

A demodulation method in a mobile station having a plurality of channels, for receiving a signal from a base station. In one aspect, the base station has a plurality of channels, a BPSK spreader for orthogonally spreading symbol data of each channel with an assigned orthogonal code, and a QPSK spreader for PN-spreading the orthogonally spread signal with a PN code. In another aspect, the base station has a plurality of channels, a QPSK spreader for spreading symbol data of each channel by the real and imaginary parts of its assigned orthogonal code, and a QPSK spreader for PN-spreading the orthogonally spread signal with a PN code. During the orthogonal despreading, the complex conjugate of the estimated pilot channel value is multiplied by the orthogonally despread signal, for compensation.
CA002316263A 1998-12-08 1999-12-08 Channel spreading device and method in cdma communication system Expired - Fee Related CA2316263C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1019980054296A KR100312214B1 (en) 1998-12-08 1998-12-08 Apparatus and method for spreading channel in cdma communication system
KR54296/1998 1998-12-08
PCT/KR1999/000749 WO2000035207A1 (en) 1998-12-08 1999-12-08 Channel spreading device and method in cdma communication system

Publications (2)

Publication Number Publication Date
CA2316263A1 true CA2316263A1 (en) 2000-06-15
CA2316263C CA2316263C (en) 2004-11-23

Family

ID=19562296

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002316263A Expired - Fee Related CA2316263C (en) 1998-12-08 1999-12-08 Channel spreading device and method in cdma communication system

Country Status (7)

Country Link
US (1) US6707788B1 (en)
EP (1) EP1053648A1 (en)
KR (1) KR100312214B1 (en)
CN (1) CN1115898C (en)
AU (1) AU751845B2 (en)
CA (1) CA2316263C (en)
WO (1) WO2000035207A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6728225B1 (en) 2000-02-10 2004-04-27 Interdigital Technology Corporation Asymmetrical forward/reverse transmission bandwidth
US6950401B2 (en) * 2000-12-20 2005-09-27 Nokia Corporation Apparatus, and associated method, for facilitating resource allocation in a communication system
FR2818836A1 (en) * 2000-12-26 2002-06-28 Koninkl Philips Electronics Nv APPARATUS COMPRISING A RECEPTION DEVICE WORKING IN DIVERSITY OF SPACE AND PROCESSING METHOD FOR SIGNALS RECEIVED ACCORDING TO MULTIPLE CHANNELS
US7245599B2 (en) * 2001-02-05 2007-07-17 The Directtv Group, Inc. Application of complex codes to maximize user link utilization
DE10158738A1 (en) * 2001-11-30 2003-07-03 Systemonic Ag Method for decoding spread-spectrum coded signals e.g. for communications technology, requires addition of first product from real-input signal and second product from imaginary-part input signal to real-part output signal
GB2384664B (en) * 2002-01-25 2004-12-22 Toshiba Res Europ Ltd Receiver processing systems
US7313168B2 (en) * 2003-03-06 2007-12-25 Nokia Corporation Method and apparatus for receiving a CDMA signal
US7668078B2 (en) * 2004-03-05 2010-02-23 Telefonaktiebolaget Lm Ericsson (Publ) Allocation of walsh codes to support calls in wireless communication networks
KR100594943B1 (en) * 2004-11-30 2006-06-30 리전츠 오브 더 유니버스티 오브 미네소타 Metheod for data modulation and demodulation in SoC
KR20120047449A (en) * 2010-11-04 2012-05-14 삼성전자주식회사 Method and apparatus for pic channel estimater considering weighting
CN105515713B (en) * 2014-09-25 2018-11-30 中兴通讯股份有限公司 A kind of multi-user's CDMA communication method and corresponding transmitter, receiver
CN106161299B (en) * 2015-03-24 2019-02-15 中兴通讯股份有限公司 A kind of data transmission method and device
KR102232391B1 (en) * 2019-08-20 2021-03-25 한국해양대학교 산학협력단 Method and Apparatus for Transmission and Reception for Index Modulated Orthogonal Frequency Division Multiplexing with Quasi-Orthogonal Sequence

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US5414728A (en) * 1993-11-01 1995-05-09 Qualcomm Incorporated Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels
JP2689890B2 (en) * 1993-12-30 1997-12-10 日本電気株式会社 Spread spectrum receiver
US5757767A (en) * 1995-04-18 1998-05-26 Qualcomm Incorporated Method and apparatus for joint transmission of multiple data signals in spread spectrum communication systems
ZA965340B (en) * 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US6005883A (en) * 1996-01-26 1999-12-21 Aironet Wireless Communications, Inc. Direct sequence network and method using PN sequence selection to represent data
JP2820918B2 (en) * 1996-03-08 1998-11-05 株式会社ワイ・アール・ピー移動通信基盤技術研究所 Spread spectrum communication equipment
JPH1141141A (en) * 1997-05-21 1999-02-12 Mitsubishi Electric Corp Spread spectrum signal receiving method and device therefor
US5926503A (en) * 1997-08-27 1999-07-20 Motorola, Inc. DS-CDMA receiver and forward link diversity method
US6233271B1 (en) * 1997-12-31 2001-05-15 Sony Corporation Method and apparatus for decoding trellis coded direct sequence spread spectrum communication signals

Also Published As

Publication number Publication date
KR100312214B1 (en) 2001-12-12
KR20000039080A (en) 2000-07-05
AU751845B2 (en) 2002-08-29
CN1115898C (en) 2003-07-23
CN1287754A (en) 2001-03-14
US6707788B1 (en) 2004-03-16
WO2000035207A1 (en) 2000-06-15
CA2316263C (en) 2004-11-23
EP1053648A1 (en) 2000-11-22
AU1692300A (en) 2000-06-26

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