ZA9507858B - Multipath search processor for a spread spectrum multiple access communication system - Google Patents

Multipath search processor for a spread spectrum multiple access communication system

Info

Publication number
ZA9507858B
ZA9507858B ZA9507858A ZA9507858A ZA9507858B ZA 9507858 B ZA9507858 B ZA 9507858B ZA 9507858 A ZA9507858 A ZA 9507858A ZA 9507858 A ZA9507858 A ZA 9507858A ZA 9507858 B ZA9507858 B ZA 9507858B
Authority
ZA
South Africa
Prior art keywords
communication system
multiple access
spread spectrum
access communication
search processor
Prior art date
Application number
ZA9507858A
Inventor
Kenneth D Easton
Jeffrey A Levin
Original Assignee
Qualcomm Inc
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
Priority to US31617794A priority Critical
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of ZA9507858B publication Critical patent/ZA9507858B/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/0007Code type
    • H04J13/004Orthogonal
    • H04J13/0048Walsh
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition
    • H04B1/70751Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70752Partial correlation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition
    • H04B1/70756Jumping within the code, i.e. masking or slewing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/711Interference-related aspects the interference being multi-path interference
    • H04B1/7115Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70703Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates
ZA9507858A 1994-09-30 1995-09-18 Multipath search processor for a spread spectrum multiple access communication system ZA9507858B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US31617794A true 1994-09-30 1994-09-30

Publications (1)

Publication Number Publication Date
ZA9507858B true ZA9507858B (en) 1996-04-22

Family

ID=23227854

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9507858A ZA9507858B (en) 1994-09-30 1995-09-18 Multipath search processor for a spread spectrum multiple access communication system

Country Status (23)

Country Link
US (1) US20010046205A1 (en)
EP (1) EP0732013B1 (en)
JP (1) JPH09506234A (en)
KR (1) KR100385004B1 (en)
CN (1) CN1096157C (en)
AT (1) AT243395T (en)
AU (2) AU688625B2 (en)
BR (1) BR9506390A (en)
CA (1) CA2174243A1 (en)
DE (2) DE69531096D1 (en)
DK (1) DK0732013T3 (en)
ES (1) ES2201123T3 (en)
FI (1) FI114123B (en)
HK (1) HK1015198A1 (en)
IL (1) IL115461D0 (en)
MX (1) MX9602026A (en)
MY (1) MY120873A (en)
PT (1) PT732013E (en)
RU (1) RU2149509C1 (en)
SI (1) SI0732013T1 (en)
TW (1) TW294866B (en)
WO (1) WO1996010873A1 (en)
ZA (1) ZA9507858B (en)

Families Citing this family (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304987B1 (en) * 1995-06-07 2001-10-16 Texas Instruments Incorporated Integrated test circuit
US5710768A (en) * 1994-09-30 1998-01-20 Qualcomm Incorporated Method of searching for a bursty signal
US6144649A (en) * 1997-02-27 2000-11-07 Motorola, Inc. Method and apparatus for acquiring a pilot signal in a CDMA receiver
US6724738B1 (en) 1997-02-27 2004-04-20 Motorola Inc. Method and apparatus for acquiring a pilot signal in a CDMA receiver
US6788708B1 (en) 1997-03-30 2004-09-07 Intel Corporation Code synchronization unit and method
IL120555A (en) * 1997-03-30 2000-06-01 D S P C Israel Ltd Code synchronization unit and method
US5872774A (en) 1997-09-19 1999-02-16 Qualcomm Incorporated Mobile station assisted timing synchronization in a CDMA communication system
US6639906B1 (en) * 1997-12-09 2003-10-28 Jeffrey A. Levin Multichannel demodulator
US6731622B1 (en) 1998-05-01 2004-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Multipath propagation delay determining means using periodically inserted pilot symbols
US6370397B1 (en) 1998-05-01 2002-04-09 Telefonaktiebolaget Lm Ericsson (Publ) Search window delay tracking in code division multiple access communication systems
DE19824218C1 (en) * 1998-05-29 2000-03-23 Ericsson Telefon Ab L M Multipath propagation delay determining apparatus using periodically inserted pilot symbols
US6456646B1 (en) 1998-11-30 2002-09-24 Ericsson Inc. Methods and systems for detecting codewords with intersymbol interference and imperfect timing
FI982856A (en) 1998-12-31 2000-07-01 Nokia Networks Oy A reception method and a receiver
US6320849B1 (en) * 1999-07-01 2001-11-20 Qualcomm Incorporated Dynamic control of search duration in a wireless communication device
KR100450791B1 (en) * 1999-07-13 2004-10-01 삼성전자주식회사 CDMA demodulating method and demodulator
US6922434B2 (en) 1999-10-19 2005-07-26 Ericsson Inc. Apparatus and methods for finger delay selection in RAKE receivers
US7769078B2 (en) * 2000-12-22 2010-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Apparatus, methods and computer program products for delay selection in a spread-spectrum receiver
US6683924B1 (en) 1999-10-19 2004-01-27 Ericsson Inc. Apparatus and methods for selective correlation timing in rake receivers
US6577616B1 (en) * 1999-12-29 2003-06-10 Nortel Networks Limited Systems and methods for implementing large CDMA cell sizes
US6947931B1 (en) * 2000-04-06 2005-09-20 International Business Machines Corporation Longest prefix match (LPM) algorithm implementation for a network processor
DK1154585T3 (en) * 2000-05-12 2008-06-23 Ipcom Gmbh & Co Kg Receiver for a multi-channel radio channel communication device
GB0016663D0 (en) * 2000-07-06 2000-08-23 Nokia Networks Oy Receiver and method of receiving
US7187708B1 (en) 2000-10-03 2007-03-06 Qualcomm Inc. Data buffer structure for physical and transport channels in a CDMA system
RU2192709C2 (en) * 2000-11-30 2002-11-10 Гармонов Александр Васильевич Method and device for receiving multiple-beam signals in code-division multiple access communication system
US6907245B2 (en) 2000-12-04 2005-06-14 Telefonaktiebolaget Lm Ericsson (Publ) Dynamic offset threshold for diversity handover in telecommunications system
US6954644B2 (en) 2000-12-04 2005-10-11 Telefonaktiebolaget Lm Ericsson (Publ) Using geographical coordinates to determine mobile station time position for synchronization during diversity handover
US6980803B2 (en) 2000-12-04 2005-12-27 Telefonaktiebolaget Lm Ericsson (Publ) Using statistically ascertained position for starting synchronization searcher during diversity handover
JP3992459B2 (en) * 2001-07-23 2007-10-17 富士通株式会社 Receiving device, receiving method, and semiconductor device
US7116126B2 (en) * 2001-10-16 2006-10-03 Sun Microsystems, Inc. Intelligent delay insertion based on transition
US7075885B2 (en) * 2001-12-03 2006-07-11 Motorola, Inc. Method for assigning variable-length walsh codes for code division multiple access communications systems
US20030108109A1 (en) * 2001-12-10 2003-06-12 Khieu Cong Q. Routing miller factor cancelling technique
US7095710B2 (en) * 2001-12-21 2006-08-22 Qualcomm Decoding using walsh space information
US7215935B2 (en) * 2002-01-17 2007-05-08 Qualcomm Incorporated Segmented CDMA searching
US7463671B2 (en) * 2002-02-19 2008-12-09 Marvell World Trade Ltd. Rake receiver interface
US8194770B2 (en) 2002-08-27 2012-06-05 Qualcomm Incorporated Coded MIMO systems with selective channel inversion applied per eigenmode
US20040081131A1 (en) 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US7002900B2 (en) 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US7324429B2 (en) 2002-10-25 2008-01-29 Qualcomm, Incorporated Multi-mode terminal in a wireless MIMO system
US8570988B2 (en) 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8169944B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Random access for wireless multiple-access communication systems
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US8170513B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US7308286B2 (en) * 2003-11-20 2007-12-11 Telefonaktiebolaget Lm Ericsson (Publ) Multi-dimensional joint searcher and channel estimators
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
JP4297780B2 (en) 2003-12-22 2009-07-15 株式会社ルネサステクノロジ Receiver
CN100574165C (en) 2004-03-09 2009-12-23 华为技术有限公司 A multi-path signal demodulation method for WCDMA system
US7890116B2 (en) 2004-05-05 2011-02-15 Nokia Corporation Adaptive beacon period in a distributed network
US7496081B2 (en) 2004-05-05 2009-02-24 Nokia Corporation Adaptive beacon period in a distributed network
WO2006009821A1 (en) * 2004-06-17 2006-01-26 W5 Networks, Inc. Pseudo noise coded communication systems
US8027372B2 (en) 2004-06-18 2011-09-27 Qualcomm Incorporated Signal acquisition in a wireless communication system
US20060163349A1 (en) * 2004-09-30 2006-07-27 W5 Networks, Inc. Wireless systems suitable for retail automation and promotion
US7558591B2 (en) * 2004-10-12 2009-07-07 Magnolia Broadband Inc. Determining a power control group boundary of a power control group
KR101096404B1 (en) 2005-02-22 2011-12-21 엘지전자 주식회사 Multi Path Searcher in asynchronous modem
US7466749B2 (en) 2005-05-12 2008-12-16 Qualcomm Incorporated Rate selection with margin sharing
US8358714B2 (en) 2005-06-16 2013-01-22 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
US20070046560A1 (en) * 2005-08-30 2007-03-01 W5 Networks, Inc. Interleaved text display
US7602838B2 (en) 2005-12-22 2009-10-13 Telefonaktiebolaget Lm Ericsson (Publ) Linear turbo equalization using despread values
TWI324469B (en) * 2006-01-13 2010-05-01 Via Tech Inc Method and apparatus for delaying sampled signal
US8738056B2 (en) 2006-05-22 2014-05-27 Qualcomm Incorporation Signal acquisition in a wireless communication system
US8676209B2 (en) 2006-06-13 2014-03-18 Qualcomm Incorporated Handoff selection for wireless communication systems
US8265178B2 (en) 2006-11-07 2012-09-11 Qualcomm Incorporated Methods and apparatus for signal and timing detection in wireless communication systems
US8929353B2 (en) 2007-05-09 2015-01-06 Qualcomm Incorporated Preamble structure and acquisition for a wireless communication system
WO2009034614A1 (en) * 2007-09-11 2009-03-19 Fujitsu Limited Wireless base station and method for controlling the same
US8532201B2 (en) 2007-12-12 2013-09-10 Qualcomm Incorporated Methods and apparatus for identifying a preamble sequence and for estimating an integer carrier frequency offset
US8537931B2 (en) 2008-01-04 2013-09-17 Qualcomm Incorporated Methods and apparatus for synchronization and detection in wireless communication systems
US20090284369A1 (en) 2008-05-13 2009-11-19 Qualcomm Incorporated Transmit power control for a wireless charging system
US8878393B2 (en) 2008-05-13 2014-11-04 Qualcomm Incorporated Wireless power transfer for vehicles
US8228971B2 (en) * 2008-07-29 2012-07-24 Agere Systems Inc. Technique for searching for a preamble signal in a spread spectrum signal using a fast Hadamard transform
US8254365B2 (en) * 2008-12-02 2012-08-28 Motorola Mobility Llc Method for maintaining timing across discontinuous activity gaps for a non-real time data interface
US20100201312A1 (en) 2009-02-10 2010-08-12 Qualcomm Incorporated Wireless power transfer for portable enclosures
US8854224B2 (en) 2009-02-10 2014-10-07 Qualcomm Incorporated Conveying device information relating to wireless charging
US9312924B2 (en) 2009-02-10 2016-04-12 Qualcomm Incorporated Systems and methods relating to multi-dimensional wireless charging
EP2326022A1 (en) * 2009-11-23 2011-05-25 Nxp B.V. Device for acquiring a spread spectrum signal
US9071286B2 (en) 2011-05-26 2015-06-30 Cohere Technologies, Inc. Modulation and equalization in an orthonormal time-frequency shifting communications system
US9444514B2 (en) 2010-05-28 2016-09-13 Cohere Technologies, Inc. OTFS methods of data channel characterization and uses thereof
KR20140144717A (en) * 2012-03-26 2014-12-19 코히어 테크널러지스, 아이엔씨. Signal modulation method resistant to echo reflections and frequency offsets
US9071285B2 (en) 2011-05-26 2015-06-30 Cohere Technologies, Inc. Modulation and equalization in an orthonormal time-frequency shifting communications system
US9031141B2 (en) 2011-05-26 2015-05-12 Cohere Technologies, Inc. Modulation and equalization in an orthonormal time-frequency shifting communications system
US8976851B2 (en) 2011-05-26 2015-03-10 Cohere Technologies, Inc. Modulation and equalization in an orthonormal time-frequency shifting communications system
US9130638B2 (en) 2011-05-26 2015-09-08 Cohere Technologies, Inc. Modulation and equalization in an orthonormal time-frequency shifting communications system
RU2485694C2 (en) * 2011-04-15 2013-06-20 Закрытое акционерное общество Научно-производственный Центр "Микропроцессорные технологии" Method and device of ds-code generation
US9967758B2 (en) 2012-06-25 2018-05-08 Cohere Technologies, Inc. Multiple access in an orthogonal time frequency space communication system
US9912507B2 (en) 2012-06-25 2018-03-06 Cohere Technologies, Inc. Orthogonal time frequency space communication system compatible with OFDM
US10411843B2 (en) 2012-06-25 2019-09-10 Cohere Technologies, Inc. Orthogonal time frequency space communication system compatible with OFDM
US9929783B2 (en) 2012-06-25 2018-03-27 Cohere Technologies, Inc. Orthogonal time frequency space modulation system
US10090972B2 (en) 2012-06-25 2018-10-02 Cohere Technologies, Inc. System and method for two-dimensional equalization in an orthogonal time frequency space communication system
US10003487B2 (en) 2013-03-15 2018-06-19 Cohere Technologies, Inc. Symplectic orthogonal time frequency space modulation system
CN103051357B (en) * 2011-10-13 2017-03-29 中兴通讯股份有限公司 Accumulating method and apparatus for multi-path alignment
US10090973B2 (en) 2015-05-11 2018-10-02 Cohere Technologies, Inc. Multiple access in an orthogonal time frequency space communication system
US10333824B1 (en) * 2013-01-02 2019-06-25 8X8, Inc. Analysis of transmission characteristics in a voice-over-IP network
CN107925434A (en) 2015-05-11 2018-04-17 凝聚技术公司 System and method for the pungent orthogonal displacement modulation and transmission of data
US9866363B2 (en) 2015-06-18 2018-01-09 Cohere Technologies, Inc. System and method for coordinated management of network access points
WO2017173461A1 (en) 2016-04-01 2017-10-05 Cohere Technologies, Inc. Tomlinson-harashima precoding in an otfs communication system
WO2017173389A1 (en) 2016-04-01 2017-10-05 Cohere Technologies Iterative two dimensional equalization of orthogonal time frequency space modulated signals
CN107295695A (en) * 2016-04-01 2017-10-24 索尼公司 Electronic installation, message processing device and information processing method
US10356632B2 (en) 2017-01-27 2019-07-16 Cohere Technologies, Inc. Variable beamwidth multiband antenna

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164628A (en) * 1977-06-06 1979-08-14 International Telephone And Telegraph Corporation Processor for multiple, continuous, spread spectrum signals
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
JP3295454B2 (en) * 1992-08-05 2002-06-24 パイオニア株式会社 Signal processing method of Gps receiver
US5654979A (en) * 1995-01-13 1997-08-05 Qualcomm Incorporated Cell site demodulation architecture for a spread spectrum multiple access communication systems
US5764687A (en) * 1995-06-20 1998-06-09 Qualcomm Incorporated Mobile demodulator architecture for a spread spectrum multiple access communication system

Also Published As

Publication number Publication date
FI962258A (en) 1996-07-22
IL115461D0 (en) 1995-12-31
EP0732013A1 (en) 1996-09-18
HK1015198A1 (en) 2004-01-30
BR9506390A (en) 1997-09-16
DK732013T3 (en)
FI114123B (en) 2004-08-13
CN1135815A (en) 1996-11-13
SI0732013T1 (en) 2004-06-30
US20010046205A1 (en) 2001-11-29
AU707834B2 (en) 1999-07-22
FI962258D0 (en)
MY120873A (en) 2005-12-30
RU2149509C1 (en) 2000-05-20
AU3945195A (en) 1996-04-26
AU6997798A (en) 1998-07-30
WO1996010873A1 (en) 1996-04-11
JPH09506234A (en) 1997-06-17
FI962258A0 (en) 1996-05-29
EP0732013B1 (en) 2003-06-18
MX9602026A (en) 1997-03-29
PT732013E (en) 2003-11-28
CA2174243A1 (en) 1996-04-11
FI114123B1 (en)
AU688625B2 (en) 1998-03-12
DE69531096T2 (en) 2004-04-08
DE69531096D1 (en) 2003-07-24
DK0732013T3 (en) 2003-09-15
TW294866B (en) 1997-01-01
CN1096157C (en) 2002-12-11
KR960706725A (en) 1996-12-09
AT243395T (en) 2003-07-15
ES2201123T3 (en) 2004-03-16
KR100385004B1 (en) 2003-10-22

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