PROCEDURE DETECTING PULSE RADIO SIGNAL AGAINST BACKGROUND OF INTERFERING RADIO PULSE AND WHITE NOISE

摘要

FIELD: radiolocation, systems transmitting discrete information. SUBSTANCE: invention is related to technology of reception and detection of pulse radio signals in presence of interfering reflection ( interference fading ) and white noise. Technical objective of invention consists in increase of noise immunity of detection of pulse radio signal against background of interfering radio pulse and white noise under invariable energy and frequency-time communication channel. Traditional procedure of detection of signal includes matched filtration with subsequent threshold decision making in presence or absence of signal according to specified criterion. It also forms additional detection channel which evaluates time delay between information and interfering signals on which base time moment τ₀ of taking reference counting is found in which value U_n(τ₀) of noise across output of matched filter is measured and correlation coefficient r(τ₀) is computed and used to calculate threshold value for decision making by formula with known power P_n of output noise and by preset probability of false alarm P_F: that is set in controlled threshold device, where ф^-1(^.) is function inverse to probability integral. In this case final decision on presence or absence of signal is made by rule: signal is detected if it is recorded in one of particular channels. EFFECT: increased noise immunity of detection of pulse radio signal against background of interfering radio pulse. 1 cl, 2 dwg