Multi-beam combined angle measuring angle and point trajectory fusion method of MIMO radar targets under orthogonal waveforms

Abstract

The invention relates to a multi-beam combined angle measuring angle and point trajectory fusion method of MIMO radar targets under orthogonal waveforms. The method includes the following steps that: the geometric model of radars in a Cartesian coordinate system is established, the number N of radar receiving array elements, the number L of radar received beams, and a radar power radiation space-domain range Omega are determined; a detection region corresponding to Omega is uniformly divided into K detection sub-regions, the received composite signals r<k>i(t) of a k-th detection sub-region which adopts the center pointing direction of an i-th radar received beam as a benchmark; conventional detection processing is carried out on the received composite signals r<k>i(t), so that the target detection result set Di of the i-th radar received beam is obtained; the angle measurement values of Mm target point trajectories in a target detection result set Dm of an m-th radar received beam, a target point trajectory set D<~>m containing the angle measurement values of the m-th radar received beam and the target point trajectory set sequence D containing the angle measurement values of L radar received beams are calculated sequentially; and point trajectory fusion is carried out, so that a target point trajectory set final sequence D<^> containing the angle measurement values of the L radar received beams in one coherent processing time is obtained.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to a multi-beam joint angle measurement and spot fusion method for a MIMO radar target under an orthogonal waveform, that is, a multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) radar under an orthogonal waveform The multi-beam joint angle measurement and point trace fusion method of the target is suitable for the multi-beam joint angle measurement and point trace fusion of the centralized MIMO radar target under the orthogonal waveform. Background technique [0002] The role of radar in today's and future electronic warfare is irreplaceable. However, due to the rapid development of science and technology, modern radars are faced with threats such as electronic interference, ultra-low altitude penetration, and radiation missiles. Therefore, it is necessary to improve old radars or develop new ones. The radar system can better complete the tasks of target detection...

AI Technical Summary

Problems solved by technology

[0005] However, due to the different transmit waveforms of the array elements contained in the centralized MIMO radar under the orthogonal waveform, pulse synthesis is required, so that the pulse pressure coefficients of the echoes in each direction of the centralized MIMO radar are different; and in actual processing, due to The target orientation is unknown, so that there is a pulse synthesis loss in the receiving and processing of the orthogonal waveform, which makes it difficult to apply the single-pulse angle measurement technology on the traditional phased array radar

In addition, in the pan-detection processing mode, different beams may receive reflected energy from the same target, especially when the receiving sidelobe is high and the receiving gain fluctuates. Possibility of police increased

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