MIMO radar sidelobe interference suppression method based on minimum redundancy linear array

Abstract

The invention belongs to the technical field of radar signal processing, and discloses an MIMO radar sidelobe interference suppression method based on a minimum redundancy linear array. The method comprises the following steps of: constructing an equivalent transmitting end steering vector and a receiving end steering vector of an MIMO radar target, and deducing a signal model of a uniform array MIMO radar according to the equivalent transmitting end steering vector and the receiving end steering vector, so as to obtain vectorized receiving data of the MIMO radar; utilizing the property of a Khatri-Rao product to obtain a virtual array element position of a uniform array; carrying out secondary virtual expansion on array elements to obtain an array arrangement form of a corresponding minimum redundant array; and transmitting and receiving signals by adopting the arrangement form of the minimum redundant array, and carrying out self-adaptive matched filtering processing to obtain output data of the minimum redundant array. According to the MIMO radar sidelobe interference suppression method, when the same number of sidelobe interference is suppressed, the number of array elements of the minimum redundant array smaller than that of the existing uniform array elements is adopted, so that resources are saved.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a minimum redundant linear array-based MIMO radar sidelobe interference suppression method, which can save the number of antenna array elements and improve the anti-sidelobe interference performance of the radar. Background technique [0002] The battle between radar jamming and anti-jamming is getting more intense and complex. Due to the narrow main beam width of the radar, active interference is easy to enter from the side lobe of the radar. The power of the interference signal is much greater than the power of the useful signal, so the interference signal entering from the side lobe of the antenna is much larger than the signal entering from the main lobe, and the number of interference entering from the side lobe is also much larger than that entering from the main lobe. In order to combat a certain number of sidelobe interferences, it is necessary to increas...

AI Technical Summary

Problems solved by technology

The ability of MIMO radar virtual aperture makes it have many advantages, such as better detection performance, higher Doppler resolution, etc. A large number of existing researches based on MIMO radar virtual aperture are aimed at its DOA and DOD estimation. applications, there are few studies on the limited number of redundant line arrays

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