InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,603,133
Bultan , et al. October 13, 2009
Efficient frame tracking in mobile receivers

Abstract
A method for determining the validity of a most significant path in a wireless communication system wherein data is transmitted in frame units in a multipath environment begins by accumulating a correlated data sequence N times, each time at a frame offset apart from the previous time. A preliminary noise estimate (PNE) is calculated as an average of the accumulated data values. A preliminary noise threshold (PNT) is calculated according to the equation C.sub.1.times.PNE. A final noise estimate (FNE) is calculated as the average of accumulated data values below the PNT. A final noise threshold (FNT) is calculated according to the equation C.sub.2.times.FNE. The validity of the most significant path is determined if the most significant path value is greater than the FNT.

Inventors: Bultan; Aykut (Bayside, NY), Haim; John W. (Baldwin, NY), Grieco; Donald (Manhassett, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/110,164
Filed: April 20, 2005
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
10733952 Dec., 2003 7006840
60507848 Sep., 2003
Current U.S. Class: 455/502 ; 370/342; 375/149; 375/150; 455/334
Current International Class: H04B 15/00 (20060101)
Field of Search: 455/502,504,506,516,334,335,148,101 375/147,148,149,150,145,354,355 370/342,202,209,335