Abstract
A search and track system for detecting the peak position of a correlation function can be simply implemented and a high resolution result can be obtained. Unfortunately it is difficult to assure industrial users that such a system will only lock on to the most significant peak of the function. In this paper a peak tracking system is described which is forced to search around the most significant peak position by using a second correlator to set the length of the shift register used by the tracking loop. The second correlator must be a digital correlator (eg, the overloading counter correlator) giving a reliable, coarse indication of the position of the most significant peak.
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