The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2007
Filed:
Jul. 15, 2002
Debarag N. Banerjee, Sunnyvale, CA (US);
Debarag N. Banerjee, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A channel estimator for determining channel weighting coefficients for a finger of the RAKE receiver. The channel estimator comprises: 1) a first correlator for receiving a first pilot channel signal and correlating the first pilot channel signal with a first pilot channel chip pattern associated with the first pilot channel signal to produce an output comprising a first pilot channel symbol sequence; and 2) a first channel estimation filter capable of receiving the first pilot channel symbol sequence and generating first channel weighting coefficients. The first channel estimation filter minimizes the mean squared error of the channel estimate in the first channel weighting coefficients caused by additive noise and Doppler effects, wherein the mean squared error is minimized across a range of Doppler frequencies from 0 Hz up to a predetermined maximum Doppler frequency.