Mismatched Filter Design and Interference Mitigation for MIMO Radars
Mismatched Filter Design and Interference Mitigation for MIMO Radars
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DOI：
10.1109/tsp.2016.2620960
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发表时间：
2017-01
影响因子：
5.4
通讯作者：
Tuomas Aittomäki;V. Koivunen
中科院分区：
文献类型：
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作者：
Tuomas Aittomäki;V. Koivunen
MIMO雷达接收机需要可靠地分离来自不同发射机的波形，同时抑制干扰才能有效运行。为了实现该目标，可以在接收器处使用失配的滤波器。通过使用失配的滤波器，可以在严格控制接收波形的自相关旁瓣和峰值互相关电平的同时降低干扰的功率。在本文中，我们提出了一种不匹配的滤波器设计方法，该方法在使滤波器输出的干扰和干扰功率最小化的同时，将所有多普勒频率的峰值旁瓣和互相关电平限制在所需的值。所提出的设计方法被描述为使用非负多项式的平方和表示的优化问题，并使用半定松弛来求解。结果表明，即使在使用估计协方差矩阵的情况下，也能获得良好的干扰抑制性能。
MIMO radar receivers need to reliably separate waveforms originating from different transmitters while suppressing interference for effective operation. In order to achieve this goal, mismatched filters may be employed at the receivers. By using mismatched filters, it is possible to reduce the power of the interference while strictly controlling the autocorrelation sidelobe and peak cross-correlation levels of the received waveforms. In this paper, we propose a mismatched filter design method that minimizes interference and jamming power at the filter output while the peak sidelobe and cross-correlation levels for all Doppler frequencies are constrained to desired values. The proposed design method is formulated as an optimization problem employing sum-of-squares representation of non-negative polynomials and solved using semidefinite relaxation. It is demonstrated that good interference suppression performance is achieved even when using an estimated covariance matrix.