Patent ID: 7366260
Filing Date: 2008-04-29
Classification: H03M,H04L

Abstract:
1. A method of path metric computation for estimating a maximum likelihood sequence in a wireless communication network, wherein a survival path per sample is determined according to channel impulse response of N samples in the path metric computation wherein N is an integer, the method comprising the following steps: calculating autocorrelation values S(n) of the channel impulse response corresponding to the N samples (n ranges from 0 to N-1); normalizing the autocorrelation values by a first autocorrelation value S(0) to generate a plurality of normalized values: comparing each of the plurality of normalized values to a threshold; judging each of the autocorrelation values S(n) as a significant autocorrelation value if corresponding normalized value is greater than the threshold, else judging the autocorrelation value as insignificant; discarding the insignificant autocorrelation value; and determining the survival path with maximum path metric by considering only the significant autocorrelation values in the path metric computation.