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:
Oct. 22, 2013
Filed:
Dec. 28, 2009
Andries Pieter Hekstra, Eindhoven, NL;
Weihua Tang, Eindhoven, NL;
Andries Pieter Hekstra, Eindhoven, NL;
Weihua Tang, Eindhoven, NL;
NXP, B.V., Eindhoven, NL;
Abstract
Various embodiments relate to a storage unit and a related method in a Viterbi decoder for decoding a binary convolutional code with power efficiency. A storage unit for storing survivor paths may use a register exchange method to append additional information received from an add-compare-select unit onto the end of the survivor path. An exemplary method produces a prediction path after a specified depth in the survivor path processing history and subtracts the prediction path from the survivor path. This may cause a majority of bits that comprise the survivor path to be converted to a low-energy bit, such as a logical '0'. During subsequent copies of a differential survivor path using the register exchange method, less energy is consumed when copying the entire survivor path, as a majority of the bits in the survivor paths are a logical '0'.