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. 17, 2013
Filed:
Jun. 30, 2005
Alessandro Vanelli Coralli, Bologna, IT;
Henry David Pfister, San Diego, CA (US);
Jilei Hou, Carlsbad, CA (US);
John Edward Smee, San Diego, CA (US);
Roberto Padovani, San Diego, CA (US);
Brian K Butler, La Jolla, CA (US);
Jeffrey a Levin, San Diego, CA (US);
Thomas B Wilborn, San Diego, CA (US);
Paul E Bender, San Diego, CA (US);
Alessandro Vanelli Coralli, Bologna, IT;
Henry David Pfister, San Diego, CA (US);
Jilei Hou, Carlsbad, CA (US);
John Edward Smee, San Diego, CA (US);
Roberto Padovani, San Diego, CA (US);
Brian K Butler, La Jolla, CA (US);
Jeffrey A Levin, San Diego, CA (US);
Thomas B Wilborn, San Diego, CA (US);
Paul E Bender, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.