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Abstract

A digital cross and auto correlator or structurator receives a stream of pulses of varying time separation forming an input signal. A plurality of channels each receives this input signal which is sampled to provide a series of digital numbers in successive sample time intervals. Each channel has a delay for delaying an input signal to a delay value to provide a delayed signal, and an arithmetic section for receiving at one input a non-delayed input signal and at another input the delayed signal. An accumulator receives the output of the arithmetic section. The collective output of the channels provides the required auto or cross correlation function. The correlator has means in each channel for providing a sample time interval and a delay value that are independent of one another and of other channels. The sample time and delay value are set by the frequency of and phase difference respectively between clock pulses.

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First Claim