Title :
Analysis of discrete implementation of generalized cross correlator
Author :
Boucher, Ronald E. ; Hassab, Joseph C.
Author_Institution :
Bedford Research Associates, Bedford, MA
fDate :
6/1/1981 12:00:00 AM
Abstract :
A common discrete implementation of the cross correlator uses a parabolic fit to the peak when the delay is not an integral multiple of the sampling period. This correspondence analyzes and assesses the pitfalls of this approach. It is shown that this yields a biased estimate of the time delay, with both the bias and variance of the estimate dependent on the location of the delay between samples, SNR, signal and noise bandwidths, and the prefilter or window used in the generalized correlator.
Keywords :
Attenuation; Bandwidth; Correlators; Delay effects; Delay estimation; Gaussian processes; Sampling methods; Signal processing; Signal to noise ratio; Yield estimation;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
DOI :
10.1109/TASSP.1981.1163623