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. 07, 2008
Filed:
Feb. 18, 2005
Sriraman Dakshinamurthy, San Jose, CA (US);
Joel L. Dawson, Cambridge, MA (US);
Derek K. Shaeffer, Redwood City, CA (US);
Korhan Titizer, Saratoga, CA (US);
Sriraman Dakshinamurthy, San Jose, CA (US);
Joel L. Dawson, Cambridge, MA (US);
Derek K. Shaeffer, Redwood City, CA (US);
Korhan Titizer, Saratoga, CA (US);
Beceem Communications Inc., Santa Clara, CA (US);
Abstract
Apparatus, systems, and methods are described that implement techniques for estimating a relative rotation between a first complex signal and a second complex signal. In apparatus form, a rotation-estimation circuit includes a first quadrant detector and receives the first and second complex signals and produces an estimate of the relative rotation between the complex signals. A variable rotator receives the estimate of the relative rotation and rotates at least one of the first and second complex signals using the estimate of the relative rotation. In method form, a first quadrant estimate is calculated that corresponds to the relative rotation between the first and second complex signals, and at least one of the first and second complex signals is rotated using the quadrant estimate of the relative rotation.