An Optimal Method for Transmitting Antenna Polarization

Abstract

The invention belongs to the field of radar technologies, and discloses a transmitting antenna polarization optimization method. The transmitting antenna polarization optimization method comprises the steps of acquiring alternative polarization modes, and carrying out initialization; setting polarization modes of transmitting antennas to be an ith set of polarization modes, controlling the transmitting antennas to transmit signals, and controlling a receiving antenna to receive the signals; acquiring matched filtering output signals; constructing observation statistics by using the matched filtering output signals, and calculating an error discrimination probability P<FD_i> at the ith set of polarization modes by using the observation statistics; judging whether the error discrimination probability P<FD_i> is greater than eta, if so, turning to the next step; if not, calculating a correct discrimination probability P<RD_i> at the ith set of polarization modes, judging whether the correct discrimination probability P<RD_i> is greater than P<RD_MAX> or not, and if not, turning to the next step; if so, enabling P<RD_MAX>=P<RD_i>, j=I, and turning to the next step; judging whether i is less then N or not, if so, enabling the cycle index i to plus 1, and continuing a new cycle; if not, turning to the next step; and outputting the P<RD_MAX>, and determining a jth set of polarization modes to be the optimal polarization mode. The method disclosed by the invention can realize optimization for the polarization modes of the transmitting antennas, and the correct discrimination probability of radar is improved.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to the field of radar polarization anti-jamming, in particular to a method for optimizing the polarization of a transmitting antenna. Background technique [0002] With the development of digital radio frequency memory technology, jammers can already intercept radar signals and generate jamming signals that are highly similar to target echoes in terms of energy, waveform, and phase modulation, so as to disguise false targets and confuse the radar system. It is difficult to identify real targets in time domain and frequency domain. [0003] Aiming at this problem, someone proposed a polarization discrimination algorithm, which mainly uses the difference in polarization characteristics between active false targets and real targets to realize target discrimination. Specifically, the polarization discrimination algorithm estimates the polarization scattering matrix of the real target an...

AI Technical Summary

Problems solved by technology

This algorithm is mainly aimed at low-resolution time-division polarization measurement radar, which can solve the identification problem of active decoys. However, since this algorithm is only for time-division polarization measurement radar, it is necessary to transmit multiple pulses to achieve the identification purpose. long processing time

2) Shi Longfei et al. designed the identification algorithm of true and false targets according to the characteristics that the polarization ratio of the interference remains unchanged under different transmission polarizations, but the polarization ratio of the target changes with the transmission polarization. target identification, but this method is sensitive to signal-to-noise

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