Radar Ambiguity Function for Random Intrapulse-Modulated Radar Signals.

摘要

The radar ambiguity function for random intrapulse-modulated signals with constant frequency and amplitude for each sub-pulse was considered. The amplitude and frequency of each sub-pulse were random variables. The amplitude modulation (AM) and frequency modulation (FM) indices and the number of sub-pulses were varied,and their effects on the statistical expectation and the simulated average of the ambiguity function were studied to see if resolution capabilities could be determined. It was assumed that the averaged ambiguity function is an effective means of determining resolution capabilities. It was found that changes in the AM index had no appreciable effect on the ambiguity functions,while changes in the FM index did. Changes in the number of sub-pulses did not affect the central spike of the statistical ambiguity function. No variations from that of an unmodulated pulse were noted in the ambiguity functions along the doppler frequency axis. Further research was suggested for a more sophisticated class of signals.