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:
r_{1}(t) = s(t) + n_{1}(t)

R_{2}(t) = s(t - D(t)) +n_{2}(t)

Where s [Formula Omitted] is Signal and n_{1} (•) and n_{2} (•) Are Noise. Simulation Results Are Presented and Discussed. Copyright © 1987 by the Institute of Electrical and Electronics Engineers, Inc.

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