Communications: directive radio wave systems and devices (e.g. – Radar ew
Patent
1993-07-06
1994-11-08
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Radar ew
G01S 736
Patent
active
053631030
ABSTRACT:
A method and apparatus for evaluating the similarity of multi-mode radar pulses detected by a passive ESM receiver. The method consists of fitting a straight line to the differential phase of pairs of received signals, one signal of a pair being a currently received signal pulse and the other a previously received signal pulse, by a best least squares fit method. The slope of that straight line gives the frequency offset between the signals and the mean square error between the actual phase-time data and the straight line indicates the similarity of the signals. A second measure of the similarity of the signals can be obtained by applying statistical tests for serial correlation in the difference between the phase-time data and the straight line.
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Torrieri, Don J., "Arrival Time Estimation by Adaptive Thresholding", IEEE Transactions of Aerospace and Electronic Systems, pp. 178-184, vol. AES-10, No. 2, Mar. 1974.
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Y. T. Chan, et al., "Emitter Identification Using Frequency Deviations", presented at Proceedings of the 16th Biennial Symposium on Communications in Kingston, Ontario, Canada on May 27-29, 1992.
Hellner Mark
Her Majesty the Queen as represented by the Minister of National
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