Communications: directive radio wave systems and devices (e.g. – Radar ew
Patent
1995-09-11
1996-12-10
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar ew
342 40, 342189, G01S 740
Patent
active
055835058
ABSTRACT:
A radar pulse detection and classification system receives times-of-arrival of pulses from simultaneous emitters over a wide range of pulse repetition frequencies (PRF's). The pulses are deinterleaved into bands of pulse repetition intervals (PRI's) so that a fixed number of pulses are required for detection of an emitter regardless of the PRI of the emitter. The pulse periodicities of the pulses in a pulse stream are determined by autocorrelation, and candidate emitter PRI's are selected from the pulse periodicities which were determined by autocorrelation. The pulses of candidate emitters are time-integrated to obtain time-integrated signals, and emitters are detected from peaks in the time-integrated signals. The time-continuity of said pulses are measured to determine emitter existence. The system receives pulses from both jittered and non-jittered emitters. It estimates jitter width in a pulse stream by utilizing peak pulse widths found by autocorrelation and removes jittered emitters from a pulse stream by predicting their times of arrival from the known PRI phase and jitter estimated for a previous pulse stream.
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Andersen David P.
Murphy Steven A.
Bowen Glenn W.
Lockheed Martin Corporation
Sotomayor John B.
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