Patent ID: 7526050
Filing Date: 2009-04-28
Classification: H04B,H04J,H04L

Abstract:
1. A method performed in a wireless communication device comprising: generating, in the wireless communication device, a feedback signal based on a first symbol decision for a first wireless signal observation; applying the feedback signal to a received wireless signal to produce a second wireless signal observation; correlating the second wireless signal observation with a plurality of candidate modulation patterns to produce a plurality of correlations, wherein each of the correlations represents a correlation of the second wireless signal observation with one of the candidate modulation patterns; estimating a plurality of phase rotations based on the correlations, wherein at most one of the phase rotations is estimated for each of the candidate modulation patterns; correcting the plurality of correlations based on the estimated a phase rotations to produce a plurality of corrected correlations; selecting one of the modulation patterns based on a maximum likelihood function and the plurality of corrected correlations; and generating a second symbol decision based on the selected modulation pattern and the estimated phase rotation corresponding to the selected modulation pattern.