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:
Jun. 29, 2010
Filed:
Jun. 01, 2006
Bartosz Mielczarek, Edmonton, CA;
Witold a Krzymien, Edmonton, CA;
Bartosz Mielczarek, Edmonton, CA;
Witold A Krzymien, Edmonton, CA;
Telecommunications Research Laboratories, Edmonton, CA;
Abstract
A method and an apparatus of constructing hybrid Automatic Repeat reQuest (ARQ) systems using specific properties of the BCJR error correcting algorithm. Since the convergence to an actual codeword is not always guaranteed with the BCJR, the method and apparatus implements a system, in which two different types of Negative AcKnowledgement messages (NAKs) are employed. The first type is the conventional one-bit NAK and the second type specifies retransmission pattern in such a way that the additional parity bits are concentrated on the parts of the code trellis that did not converge to a valid sequence.