A new approach to signal registration with the emphasis on variable time delay estimation

Signal registration is concerned with the problem of estimating a varying displacement between two random processes. We approach signal registration here as a recursive demodulation problem in which the recursion is between signal estimations and displacement estimation. Special attention is given to the problem of estimating a variable time delay. Thus, we present new algorithms for estimating D(t) from received processes: r1(t) = s(t) + n1(t) r2(t) = s(t - D(t)) + n2(t) where s(.) is signal and n1(.) and n2(.) are noise. Simulation results are presented and discussed.