CA2099322A1 - Data Demodulator of a Receiving Apparatus for Spread Spectrum Communication - Google Patents

Data Demodulator of a Receiving Apparatus for Spread Spectrum Communication

Info

Publication number
CA2099322A1
CA2099322A1 CA2099322A CA2099322A CA2099322A1 CA 2099322 A1 CA2099322 A1 CA 2099322A1 CA 2099322 A CA2099322 A CA 2099322A CA 2099322 A CA2099322 A CA 2099322A CA 2099322 A1 CA2099322 A1 CA 2099322A1
Authority
CA
Canada
Prior art keywords
pko
phase difference
receiving apparatus
spread spectrum
spectrum communication
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
CA2099322A
Other languages
French (fr)
Other versions
CA2099322C (en
Inventor
Hideshi Murai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CA2099322A1 publication Critical patent/CA2099322A1/en
Application granted granted Critical
Publication of CA2099322C publication Critical patent/CA2099322C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

A data demodulator of a receiving apparatus for spread spectrum communication for removing the phase difference remaining after detection for improving reception quality.
In-phase and quadrature axis received signals are multiplied by pseudonoise codes, PNI(t) and PNQ(t) and the results are averaged aged by averaging sections for calculating the correlation.
By performing correlation processing, pkO cos ~ , -pO sin ~, pkO sin ~, and pkO cos ~ are output when the amplitude of receive path signal is assumed to be p, the phase difference to be ~, and a proportional constant to be kO. These signals are multiplied by in-phase and quadrature axis received signals and the results are added by adders, thereby removing the effect of the phase difference ~. The signal is used for data demodulation and data recovery circuit.
CA002099322A 1992-06-29 1993-06-28 Data demodulator of a receiving apparatus for spread spectrum communication Expired - Fee Related CA2099322C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP17094692 1992-06-29
JPHEI4-170946 1992-06-29
JP14936993A JP2771757B2 (en) 1992-06-29 1993-06-21 Data demodulation circuit of receiver for spread spectrum communication
JPHEI5-149369 1993-06-21

Publications (2)

Publication Number Publication Date
CA2099322A1 true CA2099322A1 (en) 1993-12-30
CA2099322C CA2099322C (en) 1998-08-11

Family

ID=26479278

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002099322A Expired - Fee Related CA2099322C (en) 1992-06-29 1993-06-28 Data demodulator of a receiving apparatus for spread spectrum communication

Country Status (6)

Country Link
US (1) US5383220A (en)
EP (1) EP0577044B9 (en)
JP (1) JP2771757B2 (en)
CA (1) CA2099322C (en)
DE (1) DE69327988T2 (en)
FI (1) FI110730B (en)

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JP2605615B2 (en) * 1993-12-30 1997-04-30 日本電気株式会社 Spread spectrum receiver
US5559789A (en) * 1994-01-31 1996-09-24 Matsushita Electric Industrial Co., Ltd. CDMA/TDD Radio Communication System
JP2938337B2 (en) * 1994-03-09 1999-08-23 三菱電機株式会社 Data demodulation circuit for spread spectrum communication
GB2290010B (en) * 1994-05-28 1998-09-09 Roke Manor Research Ambiguity resolution in direct sequence spread spectrum modulation systems
EP1622296A3 (en) * 1994-06-23 2006-12-13 NTT DoCoMo, Inc. CDMA demodulation circuit and demodulation method
JP3444444B2 (en) * 1994-09-30 2003-09-08 ソニー株式会社 Communication terminal device
KR970011690B1 (en) * 1994-11-22 1997-07-14 삼성전자 주식회사 Data receiver & transmitter of spread spectrum using pilot channel
JP2605648B2 (en) * 1994-12-22 1997-04-30 日本電気株式会社 Despreading code phase detector for SS receiver
US5691974A (en) * 1995-01-04 1997-11-25 Qualcomm Incorporated Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy
US5793821A (en) * 1995-06-07 1998-08-11 3Com Corporation Timing Recovery using group delay compensation
JP3200547B2 (en) * 1995-09-11 2001-08-20 株式会社日立製作所 CDMA mobile communication system
US5784366A (en) * 1996-08-27 1998-07-21 Transsky Corp. Wideband code-division-multiple access system and method
JP3796870B2 (en) * 1997-01-21 2006-07-12 ソニー株式会社 Receiving device, receiving method, and terminal device of mobile phone system
US6094450A (en) * 1997-06-20 2000-07-25 Cincinnati Electronics Corporation Spread spectrum chip shift keying modulation/demodulation system and method
US6628699B2 (en) * 1997-06-23 2003-09-30 Schlumberger Resource Management Systems, Inc. Receiving a spread spectrum signal
US6047016A (en) * 1997-06-23 2000-04-04 Cellnet Data Systems, Inc. Processing a spread spectrum signal in a frequency adjustable system
US6741638B2 (en) 1997-06-23 2004-05-25 Schlumbergersema Inc. Bandpass processing of a spread spectrum signal
US6263009B1 (en) * 1997-06-23 2001-07-17 Cellnet Data Systems, Inc. Acquiring a spread spectrum signal
US6178197B1 (en) 1997-06-23 2001-01-23 Cellnet Data Systems, Inc. Frequency discrimination in a spread spectrum signal processing system
US6456644B1 (en) * 1997-06-23 2002-09-24 Cellnet Data Systems, Inc. Bandpass correlation of a spread spectrum signal
EP0899893A1 (en) * 1997-09-01 1999-03-03 Kabushiki Kaisha Toshiba Spread spectrum communications receiver
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
US6618431B1 (en) 1998-12-31 2003-09-09 Texas Instruments Incorporated Processor-based method for the acquisition and despreading of spread-spectrum/CDMA signals
JP2001016135A (en) 1999-06-29 2001-01-19 Nec Corp Method and system for automatically controlling frequency and cdma receiver
US6765974B1 (en) * 2000-07-19 2004-07-20 Radwin Ltd. Rach starting time vicinity estimation
JP3695316B2 (en) * 2000-11-24 2005-09-14 株式会社日本自動車部品総合研究所 Spread spectrum receiver correlation detector
JP4429533B2 (en) * 2001-01-29 2010-03-10 三星電子株式会社 Frequency converter
DE10108413A1 (en) * 2001-02-21 2002-09-19 Philips Corp Intellectual Pty Reception procedure for a mobile phone with multiple code reception and mobile phone
US7088965B1 (en) * 2002-01-08 2006-08-08 Sprint Spectrum L.P. Fractal antenna system and method for improved wireless telecommunications
US7292624B2 (en) * 2002-08-27 2007-11-06 Itt Manufacturing, Inc. Method and apparatus for robust acquisition of spread spectrum signals
KR20050015119A (en) * 2003-08-04 2005-02-21 삼성전자주식회사 Apparatus for modulation ranging signals in broadband wireless access communication system and method thereof
CN102521080B (en) * 2011-12-07 2013-11-20 国家电网公司 Computer data recovery method for electricity-consumption information collecting system for power consumers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3601576A1 (en) * 1986-01-21 1987-07-23 Standard Elektrik Lorenz Ag RECEIVER FOR BAND-SPREADED SIGNALS
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
JPH0748674B2 (en) * 1988-09-02 1995-05-24 クラリオン株式会社 Spread spectrum receiver
GB2240240A (en) * 1990-01-19 1991-07-24 Philips Electronic Associated Radio receiver for direct sequence spread spectrum signals
DE4020191C2 (en) * 1990-06-25 1998-09-10 Siemens Ag Method for compensating for phase and frequency errors of a quadrature phase-modulated carrier signal and arrangement for carrying out the method
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US5099494A (en) * 1990-07-26 1992-03-24 Unisys Corporation Six channel digital demodulator
US5267260A (en) * 1992-11-19 1993-11-30 Samsung Electronics Co., Ltd. Spread spectrum receiver using the code division multiple access mode

Also Published As

Publication number Publication date
EP0577044B9 (en) 2003-08-20
JP2771757B2 (en) 1998-07-02
DE69327988D1 (en) 2000-04-13
US5383220A (en) 1995-01-17
CA2099322C (en) 1998-08-11
DE69327988T2 (en) 2000-10-19
FI932995A0 (en) 1993-06-29
EP0577044A1 (en) 1994-01-05
FI932995A (en) 1993-12-30
JPH0690219A (en) 1994-03-29
EP0577044B1 (en) 2000-03-08
FI110730B (en) 2003-03-14

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Effective date: 20110628