现有雷达系统在目标跟踪时所形成的波束仅与目标方向有关，无法实现信号发射能量在特定距离和方向上的聚焦。针对上述问题，该文将频率分集阵(Frequency Diverse Array, FDA)与MIMO雷达相结合，提出一种基于非单调递增频率偏移的混合相控阵MIMO雷达目标跟踪方法。该方法利用阵元间非单调递增频率偏移，形成基于距离和方向的2维发射方向图，不仅消除了一般FDA阵列方向图在距离上的周期性，而且实现了方向图在距离和方向上的解耦合，使雷达能够形成基于距离和方向的2维点状跟踪波束。通过利用混合相控阵MIMO雷达的发射增益和波形分集特性，进一步提高目标跟踪性能。利用MUSIC算法对所提方法进行实验仿真和对比分析，分别验证了所提方法目标跟踪及抗干扰的有效性。
The traditional radar system can form an angle-dependent beam for target tracking, which is independent on the range of target and as a result can not make the transmit energy focus on the target’s position. For this problem, a novel hybrid phased-MIMO radar with non-monotone increasing frequency offset for target tracking is proposed based on the combination of the Frequency Diverse Array (FDA) with MIMO radar. With the non-monotone increasing frequency offset, this new method can form a transmit beampattern in two dimensions of range and angle, and cancel the periodicity of basic FDA beampattern in range domain as well as decouple the beampattern in range and angle dimensions. With the help of the decoupled beampattern, a two dimensional point beam can be formed to track target. With the advantages of the hybrid phased-MIMO radar’s transmit gain and waveform diversity, the tracking performance can be enforced. Finally, the target tracking accuracy of the proposed method is analysed and the performance of anti-jamming is proved by simulations results.
王玉玺，黄国策，李伟，王叶群. 基于非单调递增频率偏移的混合相控阵MIMO雷达目标跟踪方法[J]. 电子与信息学报, 2017, 39(1): 110-116.
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