Positioning a multipath search window

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C370S342000, C375S213000, C375S213000, C375S354000

Reexamination Certificate

active

07826515

ABSTRACT:
Multipath components of a signal transmitted through a time-varying digital radio channel are received with individual delays (τ) within a range (τ1. . . τM) of possible delay values. The individual delays are estimated and a delay profile (g(τi)) calculated repetitively. The method comprises searching repetitively for new multipath components in a search window constituting a subset of the possible delays, and positioning the search window based on a previous delay profile (g(τi)). For each of a number of search window positions (k) a sum of power is determined for the multipath components located in the search window with that position, and the position of the search window is selected based on the determined sums of power. In this way the multipath detection is less influenced by the noise floor, and it is also effective for channels having a wide delay spread and/or significantly time-varying delay profiles.

REFERENCES:
patent: 5644591 (1997-07-01), Sutton
patent: 5805648 (1998-09-01), Sutton
patent: 2001/0014116 (2001-08-01), Saito et al.
patent: 2001/0046221 (2001-11-01), Ostman et al.
patent: 0 951 148 (1999-10-01), None
patent: 1 225 707 (2002-07-01), None
patent: WO 99/57819 (1999-11-01), None
patent: WO 01/76087 (2001-10-01), None
European Patent Office; International Search Report for PCt/WP2004/05345 dated Aug. 12, 2004.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Positioning a multipath search window does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Positioning a multipath search window, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positioning a multipath search window will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4217393

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.