Patent ID: 8433968
Filing Date: 2013-04-30
Classification: H04L

Abstract:
1. A method for HARQ combining of a received codeword in a receiver with a FEC decoder, the method comprising: computing Log Likelihood Ratios (LLRs) of demodulated soft symbols of said received codeword and outputting said LLRs as a-priori soft bits; performing iterative decoding of said a-priori soft bits in a Forward Error Correction (FEC) decoder; outputting a-posteriori soft bits of said a-priori soft bits of said received codeword from said FEC decoder; selecting either said a-priori soft bits or said a-posteriori soft bits of said codeword for HARQ combining based on a comparison between a variance associated with said a-priori soft bits and a variance associated with said a-posteriori soft bits; and HARQ combining said selected soft bits with a retransmission of said received codeword.