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:
Jul. 17, 2001
Filed:
Nov. 25, 1998
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A programmable logic device (,) as may be used in a communication system device such as a digital subscriber line modem (,) to perform Reed-Solomon decoding upon a received frame of digital values is disclosed. The programmable logic device (,) may be implemented as a DSP (,) or a general purpose microprocessor, for example. According to one disclosed embodiment of the invention, a group of look-up tables (,) are arranged, each look-up table (,) associated with one of the possible power values of a finite field, number up to twice the number of correctable errors. The contents of each entry (SYN) of the look-up tables (,) correspond to the finite field (e.g., Galois field) multiplication of a primitive element raised to an index power with a character of the finite field alphabet. Galois field multiplications (,) in syndrome accumulation may now be performed with a single table look-up operation. According to other disclosed embodiments of the invention, look-up tables (,) are similarly arranged to contain the contents of finite field (e.g., Galois field) multiplication products for use in a Chien search procedure. In a single-thread version of the disclosed Chien search procedure, a subset of the same look-up tables (,) as used in syndrome accumulation may be utilized.