Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1984-10-02
1986-11-11
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
342 93, 342196, 342 16, G01S 740
Patent
active
046225560
ABSTRACT:
A technique and apparatus are disclosed for determining the performance of a pulse doppler radar system every integration period. The test is accomplished by injecting into the front end of the radar a highly calibrated signal during initialization or during a periodic test and measuring the signal at the Fast Fourier Transform (FFT) output. This measured signal is used by the radar signal processor as a reference signal which is adjusted for internally induced changes by the radar's signal processing system then summed with the in-phase amplitude of the selected range gate filter cell. The sumed signal and the cell quadrature amplitude are then envelope detected, and a detection counter is incremented when the envelope detection compares favorably with the cell's constant false alarm rate. Each integration period, the process is repeated for all range gate filter cells to obtain a detection count. Then the probability of detection is estimated using the equation: ##EQU1## where N.sub.1 =number of detections in integration period 1;
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Bryant Stephen M.
Speir Donald J.
Auton William G.
Barron Jr. Gilberto
Singer Donald J.
The United States of America as represented by the Secretary of
Tubbesing T. H.
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