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:
Aug. 28, 2012
Filed:
May. 07, 2008
Daniel Fred Filipovic, Solana Beach, CA (US);
Helena Deirdre O'shea, San Diego, CA (US);
Christos Komninakis, La Jolla, CA (US);
Jifeng Geng, San Diego, CA (US);
Daniel Fred Filipovic, Solana Beach, CA (US);
Helena Deirdre O'Shea, San Diego, CA (US);
Christos Komninakis, La Jolla, CA (US);
Jifeng Geng, San Diego, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
Techniques for identifying and suppressing frequency spurs in a signal are disclosed. In an embodiment, an incoming signal is rotated by a frequency related to a spur frequency, and an estimate of the content of the rotated signal is derived. The estimate may be subtracted from the rotated incoming signal, and the result de-rotated by the spur frequency. In an embodiment, the incoming signal may be rotated such that the spur is centered at DC. In an alternative embodiment, the estimate may be de-rotated before being subtracted from the original incoming signal. Techniques for addressing multiple spurs using serial and parallel architectures are disclosed. Further disclosed are techniques for searching for the presence of spurs in an incoming signal, and tracking spur frequencies over time.