Patent ID: 7643548
Filing Date: 2010-01-05
Classification: H04L

Abstract:
1. A method of joint parameter estimation based on a received signal comprising a desired signal and an interfering signal and containing known symbols associated with the desired signal comprising: performing a forward recursion through a trellis equalizer representing interferer symbols to generate a forward parameter estimate for each of a desired signal channel and an interfering signal channel, and to generate a corresponding forward error metric based on the received signal and initial forward parameter estimates; performing a backward recursion through the trellis equalizer, independent from the forward recursion, to generate a backward parameter estimate for each of the desired signal channel and the interfering signal channel, and to generate a corresponding backward error metric based on the received signal and initial backward parameter estimates; and selecting a final parameter estimate for each of the desired and interfering signal channels based on a comparison between the forward and backward error metrics.