An Autocorrelation Criterion for the Time-Diversity Reception of Speech Over Burst-Error Channels

An Autocorrelation Criterion for the TimeDiversity Reception of Speech Over Burst-Error Channels By N. S. JAYANT (Manuscript received March 25, 1975) This paper proposes a new approach to signal selection in time-diversity systems. Specifically, we consider the problem of digital speech transmission over a burst-error channel using two-channel time-diversity reception. Let every speech segment (of length W) be transmitted twice so that at least one of the transmissions escapes an error burst, with a certain useful probability. Let the received speech segments be Yi and Y2. We propose an autocorrelation-maximizing signal selection procedure of the following form. Select Yi (or Y2) as the "cleaner" speech segment according as C(Y 1, W) ^ (or W), where C(YU, W) = f (sgn YUT· s g n YU{R-1))/(W 1); u = 1, 2.