Working frequency optimization method in radar tracking state

Abstract

The invention discloses a working frequency optimization method in a radar tracking state, and belongs to the technical field of radars. The method is suitable for searching for a strong point of thesignal-to-noise ratio at a frequency response value and can improve the detection performance on a weak target and achieve the purpose of greatly reducing the radar transmission power on the premise that the detection probability required by a system is met by increasing the echo signal-to-noise ratio through frequency optimization. The idea of the method comprises the steps that a radar is determined, a target exists in the detection range of the radar, the frequency interval of a radar transmitting signal is determined, and then a frequency vector is obtained; output data of M frequencies are obtained according to the frequency vector, wherein M>=1; estimated target measurement data is obtained according to the output data of the M frequencies; a polynomial fitting function is obtained according to the estimated target measurement data; and the polynomial fitting function is solved by means of a function optimization method, and then a final radar working frequency is obtained, wherein the final radar working frequency is a working frequency optimization result in the radar tracking state.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a working frequency optimization method in a radar tracking state, which is suitable for searching the strong point of the signal-to-noise ratio (SNR) in the frequency response value. Background technique [0002] The target signal-to-noise ratio (SNR) is a measure of the ratio of the signal received by the radar to the power of the noise. It can be known from the radar equation that the target radar cross section (RCS) directly affects the size of the target echo power, thus The target RCS directly affects the signal-to-noise ratio of the target echo signal; in the target tracking stage, the target RCS information can be used to predict and search the strong point of the RCS in the frequency response value, and tracking the target at the strong point of the frequency response can avoid the target from missing. It not only improves the detection probability, but also in...

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Problems solved by technology

[0003] However, the frequency-based SNR optimization technology is not considered at present, and the existing SNR optimization methods do not consider the change of the target RCS, but only assume that the target RCS value remains unchanged; in fact, the target RCS value is ever changing

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