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:
Mar. 20, 2001
Filed:
Dec. 16, 1997
Applicant:
Inventor:
Kraig L. Anderson, San Diego, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 7/216 ; H04B 1/500 ;
U.S. Cl.
CPC ...
H04B 7/216 ; H04B 1/500 ;
Abstract
Reverse channel circuitry for CDMA based mobile stations which allows carrier phase offsets to be implemented at baseband, thereby eliminating the need for multiple quadrature modulators and excessive D/A converters. In addition, just four baseband filters, two using scaled coefficients and the other two unscaled coefficients, are time multiplexed to produce in-phase and quadrature terms. The invention can lead to a significant savings in hardware and be a valuable tool in implementing multiple code channels with different carrier phase offsets.