Accession Number : ADD012617

Title :   Technique for Rapid Determination of Probability of Detection in Pulse Doppler Radars.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Bryant,Stephen M ; Speir,Donald J

Report Date : 11 Nov 1986

Pagination or Media Count : 8

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 of during a periodic test and measuring the signal at the Fast Fourier Transform (FFT) output. This measured signal is used by the radar 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. (Patent).

Descriptors :   *PATENTS, *CALIBRATION, *DETECTION, *SIGNAL PROCESSING, *DOPPLER RADAR, *RADAR PULSES, ENVELOPE(SPACE), RADAR, RADAR SIGNALS, CELLS, FILTERS, GATES(CIRCUITS), AMPLITUDE, COUNTING METHODS, FAST FOURIER TRANSFORMS, DETERMINATION, SIGNALS

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE