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. 27, 2001
Filed:
May. 29, 1998
Tod D. Wolf, Richardson, TX (US);
Jonathan H. Shiell, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A programmable logic device, such as a digital signal processor (DSP) (,), having a Chien search unit (,) is disclosed. The Chien search unit (,) is arranged to perform finite field arithmetic functions useful in identifying roots of a polynomial, as is useful in Reed-Solomon decoding, particularly, after the execution of a Euclidean array function. Galois field multipliers (,) perform finite field multiplication of coefficient values (&Lgr;) and powers of symbol values (&agr;); the products of such multiplications are written into the coefficient register (,) for use in connection with the next symbol value. Finite field adders (,) produce a final sum that is interrogated by zero detection circuitry (,) to determine whether a root is presented by the current symbol value. The provision of a Chien search execution unit (,) provides important efficiency so as to enable programmable logic devices, such as digital signal processors (,) and microprocessors to effect Reed-Solomon decoding.