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. 03, 2002
Filed:
Dec. 30, 1998
Ali R. Shah, Dallas, TX (US);
Ericsson Inc., Research Triangle Park, NC (US);
Abstract
A telecommunications system and method is disclosed for employing an improved self-adaptive maximum likelihood sequence detection technique using a T-algorithm and its variants in order to reduce signal distortion in cellular networks. If the noise variance is known, the T-algorithm computes the metric for all the branches in the stack and computes an expected value of the desired metric. Each branch not within a small, predefined deviation from the desired metric is discarded. However, if the noise variance cannot be reliably estimated, the T-algorithm used is similar to the previously described T-algorithm, except that the comparison is with the overall best path with the minimum metric. In other words, the path with the minimum value of the metric is computed and all paths within the small, predetermined deviation of this metric are retained and the remaining are deleted from the stack.