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. 31, 1999
Filed:
Mar. 24, 1997
Terrance Ralph Beale, Greentown, IN (US);
Russell Wilbur Pogue, Jr, Greentown, IN (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
A memory efficient channel decoder circuit is provided for channel decoding differentially modulated data samples comprising multiple adjacent carriers each including two data samples associated therewith. The decoder circuit includes a pair of working read/write memory circuits partitioned into even and odd memory blocks, a separate read/write memory circuit connected thereto, and a complexmultiplier circuit having a first input connected to the working memory circuits, and a second input coupled to the separate read/write memory and a read only memory containing predefined calculation values. An in-place decimation-in-time FFT algorithm is used to differentially demodulate and frequency descramble (de-interleave) the data samples of each data symbol, as well as providing for automatic frequency control correction of the data samples.