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:
Dec. 31, 2013
Filed:
Oct. 10, 2006
James Edward Beckman, La Jolla, CA (US);
Joseph Chan, San Diego, CA (US);
Farrokh Abrishamkar, San Diego, CA (US);
Matthias Brehler, Boulder, CO (US);
Michael Leviant, Haifa, IL;
James Edward Beckman, La Jolla, CA (US);
Joseph Chan, San Diego, CA (US);
Farrokh Abrishamkar, San Diego, CA (US);
Matthias Brehler, Boulder, CO (US);
Michael Leviant, Haifa, IL;
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Techniques for deriving a channel estimate using a scattered pilot and a continual pilot are described. The scattered pilot is sent on different sets of carriers in different symbol periods. The continual pilot is sent in each symbol period on irregularly spaced carriers. The scattered pilot is used to identify the indices of channel taps of interest, e.g., L strongest channel taps. The continual pilot is used to determine the complex gains of these L channel taps. A receiver derives a channel impulse response estimate based on received pilot symbols for the scattered pilot, identifies the L strongest channel taps, and determines the indices of these L strongest channel taps. The receiver forms a Fourier sub-matrix based on the L tap indices and determines the gains of the L channel taps based on received pilot symbols for the continual pilot and the Fourier sub-matrix.