WO2003024046A3 - Spread spectrum receiver with frequency tracking which uses pilots signals - Google Patents

Spread spectrum receiver with frequency tracking which uses pilots signals Download PDF

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Publication number
WO2003024046A3
WO2003024046A3 PCT/US2002/027960 US0227960W WO03024046A3 WO 2003024046 A3 WO2003024046 A3 WO 2003024046A3 US 0227960 W US0227960 W US 0227960W WO 03024046 A3 WO03024046 A3 WO 03024046A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
loop
frequency error
estimates
spread spectrum
Prior art date
Application number
PCT/US2002/027960
Other languages
French (fr)
Other versions
WO2003024046A2 (en
Inventor
Parvathanathan Subrahmanya
Andrew Sendonaris
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
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to KR1020047003570A priority Critical patent/KR100939141B1/en
Priority to EP02768780A priority patent/EP1425892A2/en
Priority to AU2002331792A priority patent/AU2002331792A1/en
Priority to JP2003527968A priority patent/JP4405800B2/en
Publication of WO2003024046A2 publication Critical patent/WO2003024046A2/en
Publication of WO2003024046A3 publication Critical patent/WO2003024046A3/en

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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0055—Closed loops single phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0065—Frequency error detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0071—Control of loops
    • H04L2027/0079—Switching between loops
    • H04L2027/0081—Switching between loops between loops of different bandwidths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0087—Out-of-band signals, (e.g. pilots)

Abstract

Techniques to acquire and track a received signal based on one or more transmitted pilots. In an aspect, a frequency tracking loop is provided and supports a number of loop modes (e.g., acquisition and tracking modes). Each loop mode may be associated with a respective frequency detector and a set of values for a set of elements in the loop. In another aspect, several frequency detectors are provided for deriving estimates of the frequency error in the downconversion (e.g., from radio frequency to baseband). In one design, maximum likelihood estimates of the frequency error are derived based on the recovered pilot symbols. In another design, the frequency error estimates for the multipath are derived based on the frequency error estimated for each transmitted signal.
PCT/US2002/027960 2001-09-10 2002-08-29 Spread spectrum receiver with frequency tracking which uses pilots signals WO2003024046A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020047003570A KR100939141B1 (en) 2001-09-10 2002-08-29 Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a cdma communication system
EP02768780A EP1425892A2 (en) 2001-09-10 2002-08-29 Spread spectrum receiver with frequency tracking which uses pilots signals
AU2002331792A AU2002331792A1 (en) 2001-09-10 2002-08-29 Spread spectrum receiver with frequency tracking which uses pilots signals
JP2003527968A JP4405800B2 (en) 2001-09-10 2002-08-29 Method and apparatus for performing frequency tracking based on diversity transmitted pilots in CDMA communications

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/950,744 2001-09-10
US09/950,744 US7430191B2 (en) 2001-09-10 2001-09-10 Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a CDMA communication system

Publications (2)

Publication Number Publication Date
WO2003024046A2 WO2003024046A2 (en) 2003-03-20
WO2003024046A3 true WO2003024046A3 (en) 2003-06-19

Family

ID=25490816

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/027960 WO2003024046A2 (en) 2001-09-10 2002-08-29 Spread spectrum receiver with frequency tracking which uses pilots signals

Country Status (8)

Country Link
US (1) US7430191B2 (en)
EP (1) EP1425892A2 (en)
JP (1) JP4405800B2 (en)
KR (1) KR100939141B1 (en)
CN (2) CN101931432B (en)
AU (1) AU2002331792A1 (en)
TW (1) TWI241794B (en)
WO (1) WO2003024046A2 (en)

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US8072942B2 (en) * 2003-11-26 2011-12-06 Qualcomm Incorporated Code channel management in a wireless communications system
US8107512B2 (en) * 2004-03-08 2012-01-31 Thomson Licensing Method and apparatus for robust automatic frequency control in CDMA systems with constant pilot signals
US7720042B2 (en) * 2004-04-02 2010-05-18 Lg Electronics Inc. Method for transmitting and receiving data signal in MIMO system
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US8139685B2 (en) 2005-05-10 2012-03-20 Qualcomm Incorporated Systems, methods, and apparatus for frequency control
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US7929499B2 (en) * 2005-07-13 2011-04-19 Alcatel-Lucent Usa Inc. Methods of multipath acquisition for dedicated traffic channels
US7764656B2 (en) * 2005-07-13 2010-07-27 Alcatel-Lucent Usa Inc. Methods of multipath acquisition for dedicated traffic channels
US7856071B2 (en) * 2005-07-26 2010-12-21 Alcatel-Lucent Usa Inc. Multi-path acquisition in the presence of very high data rate users
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US8027373B2 (en) * 2005-09-15 2011-09-27 Qualcomm Incorporated Quick detection of signaling in a wireless communication system
US20070070934A1 (en) * 2005-09-28 2007-03-29 Pieter Van Rooyen Method and system for a reconfigurable OFDM radio supporting diversity
US20070230643A1 (en) * 2006-03-20 2007-10-04 Harris Corporation Track State - And Received Noise Power-Based Mechanism For Selecting Demodulator Processing Path In Spatial Diversity, Multi-Demodulator Receiver System
CN101064581B (en) * 2006-04-27 2012-07-04 上海宣普实业有限公司 Descrambling and despreading method and apparatus
US7720185B2 (en) * 2006-11-06 2010-05-18 Qualcomm Incorporated Narrow-band interference canceller
US8300749B2 (en) * 2008-12-19 2012-10-30 Alcatel Lucent Method, apparatus and system for frequency synchronization between devices communicating over a packet network
US8275087B2 (en) * 2008-12-19 2012-09-25 Alcatel Lucent Frequency synchronization using first and second frequency error estimators
US8213371B1 (en) * 2009-03-19 2012-07-03 Sprint Communications Company L.P. Using a synchronized access channel to track a mobile device
US9071493B2 (en) * 2009-06-29 2015-06-30 Qualcomm Incorporated Dual frequency tracking loop for OFDMA systems
US20130156127A1 (en) * 2010-07-07 2013-06-20 Donald L. Schilling OFDM Synchronization and Signal Channel Estimation
US11889313B2 (en) * 2019-11-14 2024-01-30 Qualcomm Incorporated Wireless channel power profile false base station detection
CN111735996A (en) * 2020-06-19 2020-10-02 西安电子科技大学 Multipath interference suppression method and device for mathematical wave-absorbing darkroom construction
US11015818B1 (en) * 2020-09-18 2021-05-25 The Gritchie Kitchen Company Limited Table having a heating appliance
CN117014261B (en) * 2023-10-07 2024-02-23 之江实验室 Dual-polarized channel estimation implementation method and device

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WO2001054287A2 (en) * 2000-01-18 2001-07-26 Infineon Technologies Ag Method and device for determining the carrier frequency of base stations in the mobile receiver of a cellular mobile telephony system working with w-cdma

Also Published As

Publication number Publication date
WO2003024046A2 (en) 2003-03-20
JP2005527998A (en) 2005-09-15
KR20040033042A (en) 2004-04-17
CN1586062A (en) 2005-02-23
TWI241794B (en) 2005-10-11
CN101931432B (en) 2013-12-11
AU2002331792A1 (en) 2003-03-24
CN101931432A (en) 2010-12-29
US7430191B2 (en) 2008-09-30
US20030128678A1 (en) 2003-07-10
CN100583858C (en) 2010-01-20
KR100939141B1 (en) 2010-01-28
JP4405800B2 (en) 2010-01-27
EP1425892A2 (en) 2004-06-09

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