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

A technology with minimal redundancy and side lobe interference, applied in radio wave measurement systems, instruments, etc., to achieve the effect of narrow main lobe and high target resolution

Pending Publication Date: 2021-11-19
XIDIAN UNIV
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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

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

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Embodiment Construction

[0024] Embodiments of the present invention will be described in detail below in conjunction with examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention.

[0025] refer to figure 1 , is a kind of MIMO radar side lobe interference suppression method based on minimum redundant linear array of the present invention, specifically comprises the following steps:

[0026] Step 1. According to the geometric structure of the MIMO radar array and the angle and distance of the target, considering the phase change relationship of the signal during propagation, construct the equivalent transmitting-end steering vector and receiving-end steering vector of the MIMO radar target, and derive a uniform array accordingly The signal model of MIMO radar, so as to obtain the vectorized receiving data of MIMO radar;

[0027] Such as figure 2 As...

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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...

Claims

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 朱圣棋武志霞许京伟兰岚李西敏
Owner XIDIAN UNIV
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