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:
May. 27, 1997
Filed:
Nov. 16, 1995
Gerhard P Fettweis, Dresden, DE;
Mihran Touriguian, Hercules, CA (US);
Atmel Corporation, San Jose, CA (US);
Abstract
An improved DSP has two internal data buses with two MAC units each receiving data from its respective data bus. A shifter is interposed between the multiply unit and the ALU and accumulate unit. The improved DSP also has a multiplexer interposed between one of the MAC units and the two data buses. The improved DSP is optimized to decode a received digital signal encoded in accordance with the Viterbi algorithm, wherein the DSP calculates a first pair of binary signals C.sub.2n and C.sub.2n+1 a Viterbi butterfly based upon a second pair of binary C.sub.n and C.sub.n+m/2, and a transitional signal a, in accordance with: C.sub.2n =minimum (C.sub.n +a, C.sub.n+m/2 -a); C.sub.2n+1 =minimum (C.sub.n -a, C.sub.n+m/2 +a).