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:
Dec. 05, 2000
Filed:
Feb. 04, 1998
LSI Logic Corporatino, Milpitas, CA (US);
Abstract
A method and system for compensating for code invariancies in a digital communication receiver is performed on demodulated signal data. A pre-Viterbi invariancy compensation is performed on the demodulated signal data to reverse a selected one of a number of possible transformations to create compensated signal data. The compensated signal data is then depunctured. The depunctured data is then decoded. An encoder encodes the decoded data. The encoded data and the depunctured data are then compared to determine equivalence. The pre-Viterbi invariancy compensation is performed to reverse a different one of the number of possible transformations to create the compensated signal data when the encoded data and the depunctured data are determined not to be equivalent. A post-Viterbi invariancy compensation is then performed on the decoded data to produce a set of compensated outputs. Thus, the post-Viterbi invariancy compensation reverses each one of the number of possible transformations on the decoded data. An output is then selected from between the set of compensated outputs and the decoded data in response to detection of a sync byte.