Patent ID: 9602242
Date: 2017-03-21
CPC Classifications: H04L

Claim:
1. A wireless node comprising: a Radio Frequency, RF, front-end adapted to output samples of a received signal; a channel estimator adapted to estimate a channel between a transmitter of the received signal and the wireless node based on the samples of the received signal; and a soft-value processor adapted to process the samples of the received signal according to a soft-value generation scheme that accounts for variation of effective channel estimation error with transmitted symbols to thereby provide corresponding soft values, wherein the soft-value generation scheme is based on a modified maximum likelihood metric that accounts for the variation of the effective channel estimation error with transmitted symbols and wherein the modified maximum likelihood metric is defined as: where μ(s) is the modified maximum likelihood metric for a symbol s, r is the received signal, ĥ is a channel estimate provided by the channel estimator, M is a number of receive antennas of the wireless node, N 0 is noise power spectral density, and β(s) is defined as: where G is a processing gain resulting from channel estimation.