低截获MIMO雷达改进MUSIC算法

doi:10.12305/j.issn.1001-506X.2022.02.17

摘要/Abstract

摘要：

在军事领域中, 机载多输入多输出(multiple input multiple output, MIMO)雷达既要探测机动目标, 又要防止被截获接收机侦收。针对这一问题, 提出了低截获的单基地非均匀阵列MIMO雷达改进多信号分类(multiple signal classification, MUSIC)算法。通过对MIMO雷达匹配滤波后的接收信号进行降维处理、白化处理、时频分析、时频点筛选、正交联合对角化等信号处理, 实现了低信噪比(signal to noise ratio, SNR)、低信号持续时间下的方向角估计。研究结果表明, 在相同环境下，与MIMO雷达时频MUSIC算法相比, 低截获MIMO雷达改进MUSIC算法空间谱指向精度有所提高, 可分辨角度差仅为1°的相邻目标, 适用SNR降低2 dB且保证了低截获性能。

关键词: 多输入多输出雷达, 改进多信号分类算法, 射频隐身, 低截获

Abstract:

In the military field, airborne multiple input multiple output (MIMO) radars must detect maneuvering targets and prevent them from being intercepted by intercepted receivers. Aiming at this problem, an improved multiple signal classification (MUSIC) algorithm for non-uniform array monostatic MIMO radar with low intercept is proposed. By performing dimensionality reduction processing, whitening processing, time-frequency analysis, time-frequency point filtering, orthogonal joint diagonalization and other signal processing on the received signal after MIMO radar matching filtering, the direction angle estimation under low signal-noise ratio (SNR) and low signal duration is realized. The research results show that compared with the time-frequency MUSIC algorithm of MIMO radar in the same environment, the low intercept improved MUSIC algorithm has achieved a higher accuracy of spatial spectrum pointing, which can distinguish adjacent targets with an angle difference of only 1°.The applicable SNR is reduced by 2 dB, which ensures low interception performance.

Key words: multiple input multiple output (MIMO) radar, improved multiple signal classification (MUSIC) algorithm, radio frequency stealth, low intercept

中图分类号:

TN958

赵筱彤, 周建江. 低截获MIMO雷达改进MUSIC算法[J]. 系统工程与电子技术, 2022, 44(2): 490-497.

Xiaotong ZHAO, Jianjiang ZHOU. Improved MUSIC algorithm for MIMO radar with low intercept[J]. Systems Engineering and Electronics, 2022, 44(2): 490-497.

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