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:
Nov. 18, 2008
Filed:
Nov. 29, 2004
Yun-hee Kim, Daejeon, KR;
Kwang-soon Kim, Daejeon, KR;
Sang-hyun Lee, Daejeon, KR;
Jae-young Ahn, Daejeon, KR;
Yun-Hee Kim, Daejeon, KR;
Kwang-Soon Kim, Daejeon, KR;
Sang-Hyun Lee, Daejeon, KR;
Jae-Young Ahn, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Disclosed is an apparatus and method for erasure detection and soft-decision decoding in a cellular system receiver. In the present invention, a complex channel gain and a noise variance of a received symbol from a cellular system transmitter are estimated, and an erasure symbol (a symbol with high power interference) is detected by comparing a threshold value according to the estimated complex channel gain or noise variance with power of the received symbol. Log-likelihood ratios corresponding to constituent bits of the detected erasure symbols are allowed to be 0, and the log-likelihood ratios of the constituent bits of the other received symbols are calculated. A soft-decision decoding operation of received bits is performed with the calculated log-likelihood ratios.