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:
Jan. 22, 2013
Filed:
Aug. 30, 2011
Larry Y. L. MO, San Ramon, CA (US);
Akira Yamanaka, Union City, CA (US);
Larry Y. L. Mo, San Ramon, CA (US);
Akira Yamanaka, Union City, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A system for correcting a mismatch between an in-phase path and a quadrature path in a receiver, the system including one or more processors operable to correlate a received signal with a complex training sequence having periodic, uncorrelated real and imaginary components, thereby generating a complex correlation. The one or more processors estimate a gain mismatch and a phase mismatch based on the complex correlation over a unit period. The one or more processors control a first receive filter in the in-phase path via a first digital-to-analog controller, and control a second receive filter in the quadrature path via a second digital-to-analog controller. The cutoff frequency and bandwidth of the first receive filter is controlled independently of the second receive filter to enable the output of the first receive filter and the output of the second receive filter to be tightly matched.