CA2146445A1 - Receiver and repeater for spread-spectrum communications - Google Patents

Receiver and repeater for spread-spectrum communications

Info

Publication number
CA2146445A1
CA2146445A1 CA2146445A CA2146445A CA2146445A1 CA 2146445 A1 CA2146445 A1 CA 2146445A1 CA 2146445 A CA2146445 A CA 2146445A CA 2146445 A CA2146445 A CA 2146445A CA 2146445 A1 CA2146445 A1 CA 2146445A1
Authority
CA
Canada
Prior art keywords
path including
delay circuit
repeater
delay
transmitted
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
CA2146445A
Other languages
French (fr)
Other versions
CA2146445C (en
Inventor
Fumiyuki Adachi
Mamoru Sawahashi
Akihiro Higashi
Tomohiro Dohi
Koji Ohno
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.)
NTT Docomo Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2146445A1 publication Critical patent/CA2146445A1/en
Application granted granted Critical
Publication of CA2146445C publication Critical patent/CA2146445C/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H04B7/0894—Space-time diversity using different delays between antennas
    • 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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • 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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas

Abstract

A repeater improving the effect of a RAKE
reception. A received signal from a base station parallelly passes a first path including a first delay circuit and a second path including no delay circuit, and is transmitted to a mobile station. A
received signal from the mobile station parallelly passes a third path including a second delay circuit and a fourth path including no delay circuit, and is transmitted to the base station. The delay time of the delay circuits are set at one chip interval or more of a spreading code. This forcedly produces multipath waves which are resolvable by a RAKE
receiver. The RAKE receiver estimates amplitudes of desired wave components for individual delayed waves, performs weighting of the respective delayed wave components from detectors by using the estimated amplitudes, and makes symbol decision in terms of the combined weighted signal.
CA002146445A 1993-08-06 1994-08-04 Receiver and repeater for spread-spectrum communications Expired - Fee Related CA2146445C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP196,023/1993 1993-08-06
JP19602393 1993-08-06
JP9035194 1994-04-27
JP90,351/1994 1994-04-27
PCT/JP1994/001283 WO1995005037A1 (en) 1993-08-06 1994-08-04 Receiver and repeater for spread spectrum communication

Publications (2)

Publication Number Publication Date
CA2146445A1 true CA2146445A1 (en) 1995-02-16
CA2146445C CA2146445C (en) 1999-06-01

Family

ID=26431841

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002146445A Expired - Fee Related CA2146445C (en) 1993-08-06 1994-08-04 Receiver and repeater for spread-spectrum communications

Country Status (6)

Country Link
US (1) US5652765A (en)
EP (1) EP0668662A4 (en)
KR (1) KR0164250B1 (en)
CN (1) CN1068477C (en)
CA (1) CA2146445C (en)
WO (1) WO1995005037A1 (en)

Families Citing this family (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5787344A (en) 1994-06-28 1998-07-28 Scheinert; Stefan Arrangements of base transceiver stations of an area-covering network
FI97583C (en) * 1995-02-02 1997-01-10 Nokia Mobile Phones Ltd Procedure for data communication, transmitters and receivers
JP2705623B2 (en) * 1995-03-22 1998-01-28 日本電気株式会社 Diversity transmission / reception method and transceiver
US6885652B1 (en) 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
ZA965340B (en) 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US7929498B2 (en) 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US6697350B2 (en) 1995-06-30 2004-02-24 Interdigital Technology Corporation Adaptive vector correlator for spread-spectrum communications
US6788662B2 (en) 1995-06-30 2004-09-07 Interdigital Technology Corporation Method for adaptive reverse power control for spread-spectrum communications
US7020111B2 (en) 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
US6816473B2 (en) 1995-06-30 2004-11-09 Interdigital Technology Corporation Method for adaptive forward power control for spread-spectrum communications
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US6831905B1 (en) 1995-06-30 2004-12-14 Interdigital Technology Corporation Spread spectrum system assigning information signals to message-code signals
US5754533A (en) * 1995-08-23 1998-05-19 Qualcomm Incorporated Method and system for non-orthogonal noise energy based gain control
US6108364A (en) * 1995-08-31 2000-08-22 Qualcomm Incorporated Time division duplex repeater for use in a CDMA system
JPH09116475A (en) * 1995-10-23 1997-05-02 Nec Corp Time diversity transmission/reception system
FI100494B (en) * 1995-11-20 1997-12-15 Nokia Telecommunications Oy Procedure for controlling recipients and recipients
US6069912A (en) * 1995-11-29 2000-05-30 Ntt Mobile Communications Network, Inc. Diversity receiver and its control method
US6223019B1 (en) 1996-03-14 2001-04-24 Sirius Satellite Radio Inc. Efficient high latitude service area satellite mobile broadcasting systems
CA2210582C (en) * 1996-07-24 2001-01-30 Ntt Mobile Communications Network Inc. Method and apparatus for receiving cdma radio communication
US5864579A (en) * 1996-07-25 1999-01-26 Cd Radio Inc. Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation
US6026115A (en) * 1996-08-23 2000-02-15 Ntt Mobile Communications Network, Inc. Rake receiver
DE19637018A1 (en) * 1996-09-12 1998-03-19 Bayer Ag Process for the production of rigid and flexible circuits
US5966411A (en) * 1996-12-18 1999-10-12 Alcatel Usa Sourcing, L.P. Multipath equalization using taps derived from a parallel correlator
US6633743B1 (en) * 1996-12-24 2003-10-14 Lucent Technologies Inc. Remote wireless communication device
US6023616A (en) * 1998-03-10 2000-02-08 Cd Radio Inc. Satellite broadcast receiver system
US6275484B1 (en) * 1997-06-23 2001-08-14 Lucent Technologies Inc. Methods and apparatus for increasing the uplink gain for a CDMA base station
US6061548A (en) * 1997-07-17 2000-05-09 Metawave Communications Corporation TDMA repeater eliminating feedback
JP3274388B2 (en) * 1997-07-25 2002-04-15 株式会社東芝 RAKE receiver and spread spectrum communication apparatus provided with the RAKE receiver
KR100242132B1 (en) * 1997-08-22 2000-02-01 윤종용 Apparatus for delaying an imformation signal for transmission correspond to sector respectively and transmitting the deayed signal in a base station of mobile communicatim system
DE19741872C1 (en) 1997-09-23 1999-02-04 Deutsche Telekom Ag Adaptive receiver for CDMA base station
US20020051434A1 (en) * 1997-10-23 2002-05-02 Ozluturk Fatih M. Method for using rapid acquisition spreading codes for spread-spectrum communications
US6507741B1 (en) * 1997-12-17 2003-01-14 Nortel Networks Limited RF Repeater with delay to improve hard handoff performance
JP2918873B1 (en) 1998-02-17 1999-07-12 株式会社エイ・ティ・アール環境適応通信研究所 Array antenna device for spread spectrum communication
US6125109A (en) * 1998-02-24 2000-09-26 Repeater Technologies Delay combiner system for CDMA repeaters and low noise amplifiers
US6366607B1 (en) * 1998-05-14 2002-04-02 Interdigital Technology Corporation Processing for improved performance and reduced pilot
JP2982795B1 (en) * 1998-06-29 1999-11-29 日本電気株式会社 Spread spectrum signal receiving method and receiver
JP3028804B2 (en) * 1998-07-03 2000-04-04 日本電気株式会社 CDMA receiving method and receiving circuit
JP2991196B1 (en) * 1998-08-24 1999-12-20 日本電気株式会社 CDMA receiving method and receiver
US6658050B1 (en) * 1998-09-11 2003-12-02 Ericsson Inc. Channel estimates in a CDMA system using power control bits
FI106897B (en) 1998-09-14 2001-04-30 Nokia Networks Oy RAKE receiver
JP3031350B2 (en) * 1998-09-14 2000-04-10 日本電気株式会社 Spread spectrum demodulator and method
US6259730B1 (en) * 1998-11-10 2001-07-10 Lucent Technologies, Inc. Transmit diversity and reception equalization for radio links
US6192249B1 (en) 1998-12-03 2001-02-20 Qualcomm Inc. Method and apparatus for reverse link loading estimation
US6442398B1 (en) 1998-12-03 2002-08-27 Qualcomm Incorporated Method and apparatus for reverse link loading estimation
US6314127B1 (en) 1999-02-23 2001-11-06 Lucent Technologies Inc. System and method for enhancing signal reception
SE514436C2 (en) * 1999-06-18 2001-02-26 Ericsson Telefon Ab L M Arrangements in a radio system
US6397070B1 (en) 1999-07-21 2002-05-28 Qualcomm Incorporated Method and apparatus for estimating reverse link loading in a wireless communication system
DE69931521T2 (en) * 1999-11-26 2006-12-21 Nokia Corp. Rake receiver
JP3732707B2 (en) * 2000-03-16 2006-01-11 富士通株式会社 Resynchronization control device and resynchronization method in subscriber side communication device
JP3397744B2 (en) * 2000-03-28 2003-04-21 松下電器産業株式会社 Communication device and CDMA communication method
WO2002011301A2 (en) * 2000-08-01 2002-02-07 Repeater Technologies, Inc. Improved delay combiner system for cdma repeaters and low noise amplifiers
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
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
EP1386406A4 (en) 2001-03-30 2009-06-03 Science Applic Int Corp Multistage reception of code division multiple access transmissions
US7170924B2 (en) * 2001-05-17 2007-01-30 Qualcomm, Inc. System and method for adjusting combiner weights using an adaptive algorithm in wireless communications system
US6990137B2 (en) * 2001-05-17 2006-01-24 Qualcomm, Incorporated System and method for received signal prediction in wireless communications systems
KR100419789B1 (en) * 2001-08-10 2004-02-21 주식회사 텔레매틱스 Apparatus for Interexchanging Multi-Path of Mobile Communication System using Delay Process
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
CA2486758A1 (en) 2002-06-21 2003-12-31 Widefi, Inc. Wireless local area network repeater
FR2845217B1 (en) * 2002-09-27 2004-12-17 St Microelectronics Sa PROCESS FOR PROCESSING AN INCIDENT SIGNAL WITHIN A MULTI-FINGER "RAKE" RECEIVER AND CORRESPONDING "RAKE" RECEIVER
US8885688B2 (en) 2002-10-01 2014-11-11 Qualcomm Incorporated Control message management in physical layer repeater
US20040146094A1 (en) * 2002-11-12 2004-07-29 Ning Kong Method and apparatus for rake combining based upon signal to interference noise ratio
CN1521967A (en) * 2003-02-11 2004-08-18 北京三星通信技术研究有限公司 Method of end-to-end direct communication synchronization in TDM mobile communication system
US20060172710A1 (en) * 2003-03-26 2006-08-03 Celletra Ltd. Phase sweeping methods for transmit diversity and diversity combining in bts sector extension and in wireless repeaters
FR2854995B1 (en) 2003-05-14 2005-07-29 Nortel Networks Ltd SPECTRUM DISPLAY MODULATOR AND DEMODULATOR
US8452316B2 (en) 2004-06-18 2013-05-28 Qualcomm Incorporated Power control for a wireless communication system utilizing orthogonal multiplexing
US7197692B2 (en) 2004-06-18 2007-03-27 Qualcomm Incorporated Robust erasure detection and erasure-rate-based closed loop power control
US7613423B2 (en) * 2004-09-10 2009-11-03 Samsung Electronics Co., Ltd. Method of creating active multipaths for mimo wireless systems
KR20070048639A (en) * 2004-09-17 2007-05-09 마쯔시다덴기산교 가부시키가이샤 Wireless transmission system and wireless transmission method and wireless station and transmitting station for use therein
US8942639B2 (en) 2005-03-15 2015-01-27 Qualcomm Incorporated Interference control in a wireless communication system
US8848574B2 (en) 2005-03-15 2014-09-30 Qualcomm Incorporated Interference control in a wireless communication system
US7257040B2 (en) * 2005-09-27 2007-08-14 Macronix International Co., Ltd. Fast pre-charge circuit and method of providing same for memory devices
JP5430938B2 (en) 2005-10-27 2014-03-05 クゥアルコム・インコーポレイテッド Method and apparatus for estimating reverse link loading in a wireless communication system
WO2007102684A1 (en) * 2006-03-06 2007-09-13 Airpoint Co., Ltd. Appararus and method for cancellating interference signal of mobile communication repeater
EP1876728B1 (en) 2006-07-07 2014-01-01 E-Blink Synchronisation method for two electronic devices over a wireless connection, in particular over a mobile telephone network, as well as a system to implement said procedure
EP1895681A1 (en) * 2006-09-04 2008-03-05 E-Blink System for wireless transmission of data from a base station to a relay station in a cellular telephone network
US8442572B2 (en) 2006-09-08 2013-05-14 Qualcomm Incorporated Method and apparatus for adjustments for delta-based power control in wireless communication systems
US8670777B2 (en) 2006-09-08 2014-03-11 Qualcomm Incorporated Method and apparatus for fast other sector interference (OSI) adjustment
US20080063046A1 (en) * 2006-09-12 2008-03-13 Johannes Hendrik Conroy Method and System for Estimating Signal Error in a Communication System
CA2663419C (en) 2006-09-21 2016-07-19 Qualcomm Incorporated Method and apparatus for mitigating oscillation between repeaters
DE102006050179A1 (en) * 2006-10-25 2008-05-29 Alcatel Lucent Apparatus and method for emulating a reusable environment in a radio network arranged or expanding in an environment free of reusable effects
WO2008057290A1 (en) * 2006-10-26 2008-05-15 Qualcomm Incorporated Repeater techniques for multiple input multiple output utilizing beam formers
ES2623847T3 (en) 2007-06-01 2017-07-12 Nextivity, Inc. Short range amplifier and methods for amplifying with multiple antennas
CN101884243B (en) * 2007-11-21 2013-04-17 朗讯科技公司 CDMA base station and signal processing method used therein
US8369268B2 (en) * 2009-11-06 2013-02-05 Clearwire Ip Holdings Llc Multiple device to one-antenna combining circuit and methods of using same
FR2956934B1 (en) 2010-02-26 2012-09-28 Blink E METHOD AND DEVICE FOR TRANSMITTING / RECEIVING ELECTROMAGNETIC SIGNALS RECEIVED / EMITTED ON ONE OR MORE FIRST FREQUENCY BANDS.
US20130183895A1 (en) * 2012-01-13 2013-07-18 Qualcomm Incorporated System, apparatus, and method for facilitating multi-antenna diversity for repeaters in wireless communication systems
FR2990315B1 (en) 2012-05-04 2014-06-13 Blink E METHOD FOR TRANSMITTING INFORMATION BETWEEN A TRANSMITTING UNIT AND A RECEIVING UNIT
US9031117B2 (en) * 2012-12-06 2015-05-12 Qualcomm Incorporated Methods and apparatus for handling fingers with large delay spread through utility optimization
CN105746564B (en) * 2015-12-28 2018-07-06 山东潍坊润丰化工股份有限公司 A kind of Pesticidal combination containing imidacloprid and dimehypo and its preparation method and application

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5850061B2 (en) * 1978-08-10 1983-11-08 三菱電機株式会社 communication facilities
US4291410A (en) * 1979-10-24 1981-09-22 Rockwell International Corporation Multipath diversity spread spectrum receiver
US4550414A (en) * 1983-04-12 1985-10-29 Charles Stark Draper Laboratory, Inc. Spread spectrum adaptive code tracker
US4761796A (en) * 1985-01-24 1988-08-02 Itt Defense Communications High frequency spread spectrum communication system terminal
GB2237706A (en) * 1989-11-03 1991-05-08 Racal Res Ltd Radio communications link with diversity
JPH05268128A (en) * 1992-03-18 1993-10-15 Kokusai Denshin Denwa Co Ltd <Kdd> Cdma communication system
US5233626A (en) * 1992-05-11 1993-08-03 Space Systems/Loral Inc. Repeater diversity spread spectrum communication system
US5224122A (en) * 1992-06-29 1993-06-29 Motorola, Inc. Method and apparatus for canceling spread-spectrum noise

Also Published As

Publication number Publication date
US5652765A (en) 1997-07-29
WO1995005037A1 (en) 1995-02-16
EP0668662A4 (en) 1997-02-12
CN1137335A (en) 1996-12-04
KR0164250B1 (en) 1999-02-01
CN1068477C (en) 2001-07-11
KR950703817A (en) 1995-09-20
EP0668662A1 (en) 1995-08-23
CA2146445C (en) 1999-06-01

Similar Documents

Publication Publication Date Title
CA2146445A1 (en) Receiver and repeater for spread-spectrum communications
US7477677B2 (en) Method and apparatus for multipath demodulation in a code division multiple access communication system
US5894500A (en) Method and apparatus for canceling signals in a spread-spectrum communication system
US5926503A (en) DS-CDMA receiver and forward link diversity method
Grob et al. Microcellular direct-sequence spread-spectrum radio system using N-path RAKE receiver
JP3425372B2 (en) Communication signal receiving method
US20040017843A1 (en) Receiver processing systems
FI965180A0 (en) Adaptive sectorization in a spread spectrum communication system
EP0870370A1 (en) Method and apparatus for providing antenna diversity in a portable radiotelephone
CA2223116A1 (en) Cdma chip synchronization circuit
CN1324524A (en) Rake receiver
US6463048B1 (en) Code generator for multiple rake finger and method of use
JPH07231278A (en) Reke receiver by direct spread spectrum communication system
US7003022B2 (en) Matched filter and receiver for mobile radio communication system
CA2223358A1 (en) Spread-spectrum transmitter and receiver
EP1151551A1 (en) Method of receiving spread spectrum signal, and receiver
EP0890223A2 (en) Method for allocating rake branches and rake receiver
US6169887B1 (en) Range extension within a communication system
US6233272B1 (en) Spread spectrum communication receiver
Lam et al. Performance of direct-sequence spread-spectrum multiple-access systems in mobile radio
Oon et al. Performance of an adaptive successive serial-parallel CDMA cancellation scheme in flat Rayleigh fading channels
Yousef et al. A new combined architecture for CDMA location searchers and RAKE receivers
JP2877243B2 (en) Spread spectrum communication receiver
Pham et al. Adaptive space-time MMSE receivers in DS/CDMA systems
Fuente et al. Direct sequence spread spectrum radio LANs

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20080804