WO1998002967A3 - A delay estimation method and a receiver - Google Patents

A delay estimation method and a receiver Download PDF

Info

Publication number
WO1998002967A3
WO1998002967A3 PCT/FI1997/000446 FI9700446W WO9802967A3 WO 1998002967 A3 WO1998002967 A3 WO 1998002967A3 FI 9700446 W FI9700446 W FI 9700446W WO 9802967 A3 WO9802967 A3 WO 9802967A3
Authority
WO
WIPO (PCT)
Prior art keywords
delay
paths
delays
path
results
Prior art date
Application number
PCT/FI1997/000446
Other languages
French (fr)
Other versions
WO1998002967A2 (en
Inventor
Jorma Lilleberg
Esko Nieminen
Original Assignee
Nokia Mobile Phones Ltd
Jorma Lilleberg
Esko Nieminen
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 Nokia Mobile Phones Ltd, Jorma Lilleberg, Esko Nieminen filed Critical Nokia Mobile Phones Ltd
Priority to AU34454/97A priority Critical patent/AU3445497A/en
Priority to JP10505646A priority patent/JP2000514968A/en
Priority to US09/214,801 priority patent/US6411186B1/en
Priority to DE69733277T priority patent/DE69733277T2/en
Priority to EP97930537A priority patent/EP0988710B1/en
Publication of WO1998002967A2 publication Critical patent/WO1998002967A2/en
Publication of WO1998002967A3 publication Critical patent/WO1998002967A3/en

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

Abstract

The invention relates to a delay estimation method and a receiver in a radio system. The signals originate from one or several transmitters and they have propagated along several paths. In the method, one of the determined paths (73 - 77) is selected at a time for estimation. The least squares minimization problem between the received signal and the code bank model is solved path by path (73 - 77) and delay by delay. In such a case, when the minimization results are formed, the delay of only one selected path is changed at a time while the delays of the other paths (73 - 77) remain unchanged. The minimization results are used to search for a delay for which the minimized result is at most equal to the results for the other delays. This delay is stored and used as the constant value of the path (73 - 77) when the delays of the other paths are searched for. The method can be repeated if necessary. The method has the advantage that it provides the delays of all the paths (73 - 77) of all the users simultaneously without information on the user symbols or the attenuation coefficients of the channel.
PCT/FI1997/000446 1996-07-12 1997-07-11 A delay estimation method and a receiver WO1998002967A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU34454/97A AU3445497A (en) 1996-07-12 1997-07-11 A delay estimation method and a receiver
JP10505646A JP2000514968A (en) 1996-07-12 1997-07-11 Delay estimation method and receiver
US09/214,801 US6411186B1 (en) 1996-07-12 1997-07-11 Delay estimation method and a receiver
DE69733277T DE69733277T2 (en) 1996-07-12 1997-07-11 DELAY ESTIMATION METHOD AND RECEIVER
EP97930537A EP0988710B1 (en) 1996-07-12 1997-07-11 A delay estimation method and a receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI962845 1996-07-12
FI962845A FI101659B (en) 1996-07-12 1996-07-12 Procedure for estimating the delay and receiver

Publications (2)

Publication Number Publication Date
WO1998002967A2 WO1998002967A2 (en) 1998-01-22
WO1998002967A3 true WO1998002967A3 (en) 1998-02-26

Family

ID=8546383

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1997/000446 WO1998002967A2 (en) 1996-07-12 1997-07-11 A delay estimation method and a receiver

Country Status (8)

Country Link
US (1) US6411186B1 (en)
EP (1) EP0988710B1 (en)
JP (1) JP2000514968A (en)
CN (1) CN1153368C (en)
AU (1) AU3445497A (en)
DE (1) DE69733277T2 (en)
FI (1) FI101659B (en)
WO (1) WO1998002967A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2349549B (en) * 1999-04-29 2003-07-30 Nec Technologies Delay estimation in digital radio systems
FR2794312B1 (en) * 1999-05-28 2001-08-17 Nortel Matra Cellular METHODS OF ESTIMATING PROPAGATION PATHWAY CHARACTERISTICS BETWEEN A TRANSMITTER AND A RADIO RECEIVER
US6549565B1 (en) * 1999-12-07 2003-04-15 Lucent Technologies Inc. Code division multiple access system and method of operation with improved signal acquisition and processing
US6947748B2 (en) * 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
WO2002049306A2 (en) * 2000-12-15 2002-06-20 Broadstorm Telecommunications, Inc. Multi-carrier communications with group-based subcarrier allocation
FI20012587A (en) * 2001-12-28 2003-06-29 Nokia Corp Method for estimating a downlink channel and a subscriber terminal
CN1312869C (en) * 2003-12-19 2007-04-25 中兴通讯股份有限公司 Method for measuring radio communication system propagation delay
US7573851B2 (en) 2004-12-07 2009-08-11 Adaptix, Inc. Method and system for switching antenna and channel assignments in broadband wireless networks

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EP0749215A2 (en) * 1995-06-14 1996-12-18 Sharp Kabushiki Kaisha Multipath diversity reception in a spread spectrum communication system

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CA2037824C (en) 1990-03-20 1999-11-09 Hiroshi Kubo Diversity circuit and frame phase (or sampling timing) estimation circuit using the diversity circuit
US5218621A (en) * 1991-04-04 1993-06-08 Motorola, Inc. Adaptive digital equalization filter
FI87616C (en) 1991-04-05 1993-01-25 Nokia Mobile Phones Ltd Method for controlling the function of a packet switched CDMA data network for controlling the operation of the transmitters and receivers
FI87615C (en) 1991-04-05 1993-01-25 Nokia Mobile Phones Ltd Control system for a packet-linked CDMA data network
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FI110731B (en) * 1994-09-12 2003-03-14 Nokia Corp Procedure for estimating a channel and receiver
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5231648A (en) * 1991-03-21 1993-07-27 Northern Telecom Limited Adaptive equalizer for digital cellular radio
US5448600A (en) * 1993-08-13 1995-09-05 Matra Communication Method for selecting propagation paths retained for receiving messages transmitted by CDMA radiocommunication
WO1995024086A2 (en) * 1994-02-25 1995-09-08 Philips Electronics N.V. A multiple access digital transmission system and a radio base station and a receiver for use in such a system
EP0749215A2 (en) * 1995-06-14 1996-12-18 Sharp Kabushiki Kaisha Multipath diversity reception in a spread spectrum communication system

Also Published As

Publication number Publication date
FI101659B1 (en) 1998-07-31
WO1998002967A2 (en) 1998-01-22
EP0988710A2 (en) 2000-03-29
FI101659B (en) 1998-07-31
US6411186B1 (en) 2002-06-25
AU3445497A (en) 1998-02-09
DE69733277D1 (en) 2005-06-16
FI962845A0 (en) 1996-07-12
CN1225209A (en) 1999-08-04
DE69733277T2 (en) 2006-06-22
CN1153368C (en) 2004-06-09
FI962845A (en) 1998-01-13
EP0988710B1 (en) 2005-05-11
JP2000514968A (en) 2000-11-07

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