METHODS AND RECEIVERS THAT ESTIMATE MULTI-PATH DELAYS BY REMOVING SIGNAL RAYS FROM A POWER-DELAY PROFILE

WIPO Patent Application WO2004098087

A3

A method for estimating a plurality of delay values in a multi-path communication signal. Correlation values are generated that correspond to a plurality of delay values associated with the multi-path communication signal. A first power-delay profile (PDP) sequence is produced from the correlation values and is used to estimate a first delay value. A first reference PDP sequence is generated based on a predefined PDP sequence and the first PDP sequence. The first reference PDP sequence is removed from the first PDP sequence so as to remove at least a portion of the contributions to the first PDP sequence from the first delay value, and to provide a second PDP sequence. A second value is estimated based on the second PDP sequence.

BOTTOMLEY GREGORY EDWARD (US)
KHAYRALLAH ALI S (US)
OLSON HENRIK (SE)
NILSSON JOHAN (SE)

PCT/US2004/012733

March 03, 2005

April 23, 2004

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ERICSSON TELEFON AB L M (SE)
BOTTOMLEY GREGORY EDWARD (US)
KHAYRALLAH ALI S (US)
OLSON HENRIK (SE)
NILSSON JOHAN (SE)

H04B1/707; H04L25/02; (IPC1-7): H04B1/707; H04L25/02

WO1999035763A1

1999-07-15

EP1126626A2	2001-08-22
EP0701343A1	1996-03-13
EP0654677A1	1995-05-24
US6229842B1	2001-05-08

SOUROUR E ET AL: "Delay tracking for direct sequence spread spectrum systems in multipath fading channels", VEHICULAR TECHNOLOGY CONFERENCE, 1999 IEEE 49TH HOUSTON, TX, USA 16-20 MAY 1999, PISCATAWAY, NJ, USA,IEEE, US, 16 May 1999 (1999-05-16), pages 422 - 426, XP010341907, ISBN: 0-7803-5565-2

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