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:
Apr. 24, 2007
Filed:
Jul. 08, 2002
William H. Smith, Bethelehem, PA (US);
Koji O. Tanaka, Gilbertsville, PA (US);
Shuzhan Xu, Coplay, PA (US);
William H. Smith, Bethelehem, PA (US);
Koji O. Tanaka, Gilbertsville, PA (US);
Shuzhan Xu, Coplay, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
A turbo decoder employs max* term or max term maximum a priori (MAP) decoding of received, encoded data. Initially, MAP decoding is iterative and employs max* term computation of log-likelihood values at each iteration. Max* term computation includes computation of a max term and a logarithmic correction term. A bypass algorithm switches from max* term computation to only max term computation in later iterations with little or no degradation in decoder performance. The iteration selected for switching may be based on increasing intrinsic signal-to-noise ratio (SNR) of the iterative MAP decoding. Since, in general, fewer computations are required for max term computation than for max* term computation, switching between max* and max allows for reduced power consumption of a particular decoder implementation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile