RU97105516A - METHOD OF GUARANTEEING THE PURPOSE OF A MONOPULSE RADAR STATION - Google Patents

Claims (1)

1. A method of tracking a target with a monopulse radar station, including emitting pulsed coherent signals in a given direction, receiving high-frequency signals in a given range of distances, sum-difference converting the received signals, superheterodyne converting them to an intermediate frequency, amplifying the sum and difference signals at an intermediate frequency, different the fact that after amplification of the total and difference signals at an intermediate frequency, the spectrum of signals is converted into a region video frequencies through phase detection using reference oscillations with the formation of the quadrature components of each signal, carry out a coordinated filtering of video pulses of the quadrature components of the signals, for each range element in a given interval carry out multi-channel Doppler filtering of the complex envelope of the pulse sequence of the total signal in the Doppler frequency range

with ΔF band and number of channels

where F _p is the pulse repetition rate of the probe pulses, ΔF is the spectrum width of inter-period fluctuations of the signals from the true targets, the powers of the spectral components are compared with the detection threshold level, the spectrum width with the most powerful spectral component is determined from the set level from the number of components that exceeded the detection threshold, and the obtained the value of the width of the spectrum with a given threshold value, when it is exceeded, they decide on the presence of a signal from a false target and go to the next element of range, and if there is no excess of the specified threshold value by the obtained spectrum width, a decision is made on the presence of a signal from the true target in the corresponding range element, the Doppler frequency value corresponding to the spectrum maximum is determined, the frequency of the reference oscillations is changed by the value of the measured Doppler frequency value, the frequency error signal is determined, close the frequency tracking loop and adjust the frequency of the reference oscillations with this signal, perform narrow-band filtering with a band ΔF of the complex envelope of the pulse sequences of signals in the total and difference channels at zero Doppler frequency, the amplitude envelope of the signals in the total channel is extracted, the signal is selected in range in the total channel, the range tracking loop is closed and the position of the range gate is adjusted with this signal, the angular signal is extracted discrepancies by pairwise multiplication of the filtering results of the same quadrature components of the signals in the total and difference channels and sum Bani these products, short circuit tracking the angle range strobe signal and adjusts the angular position of the antenna mismatch.