Patent ID: 7187726

Claim:
A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment, the method comprising: estimating the multipath propagation impairment of the received digitally modulated signal; estimating at least one symbol of the received digitally modulated signal; adjusting the at least one estimated symbol based upon the estimated multipath propagation impairment to generate an estimate of the at least one symbol as impaired by the multipath propagation; generating at least one error signal by comparing the estimate of the at least one symbol as impaired by the multipath propagation to the received digitally modulated signal; using the at least one error signal for estimating remaining symbols to be demodulated and for refining the estimated multipath propagation impairment, the estimating comprising estimating at least one next symbol, and adjusting the estimate of the at least one next symbol based upon the refined estimated multipath propagation impairment for generating an estimate of the at least one next symbol as impaired by the multipath propagation; and refining the at least one error signal by comparing the estimate of the at least one next symbol as impaired by the multipath propagation to the received digitally modulated signal, and to the at least one error signal resulting from at least one previous comparison.