Phased-MIMO Radar With Frequency Diversity for Range-Dependent Beamforming

Phased-MIMO Radar With Frequency Diversity for Range-Dependent Beamforming
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具有频率分集的相控 MIMO 雷达,可实现距离相关波束成形

DOI:
10.1109/jsen.2012.2232909
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发表时间:
2013-04
影响因子:
4.3
通讯作者:
Wen-Qin Wang
Wen-Qin Wang
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Wen-Qin Wang

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相控多输入多输出(MIMO)雷达是一种灵活的技术,它在不牺牲相控阵雷达主要优点的前提下,充分发挥了MIMO雷达的优点。然而,相控阵MIMO雷达仅限于距离无关的方向性,这限制了雷达在抑制非期望的距离相关干扰方面的性能。本文提出了一种用于距离相关波束形成的具有频率分集的新型相控阵MIMO雷达。该技术的实质是将频率分集阵列发射阵列划分为多个子阵,每个子阵以较小的频率增量在阵元之间相干地传输不同的波形。每个子阵形成定向波束,所有波束通过调节频率增量独立可控。这些子阵列共同提供灵活的工作模式和距离相关的波束形成。通过分析发射-接收波束方向图和输出信干噪比,比较了相控MIMO雷达的波束形成性能。数值仿真结果验证了该方法的有效性。
Phased-multiple-input and multiple-output (MIMO) radar is a flexible technique which enjoys the advantages of MIMO radar without sacrificing the main advantage of phased-array radar. However, the phased-MIMO radar is limited to range-independent directivity; this limits the radar performance to mitigate non-desirable range-dependent interferences. In this paper, we propose a new phased-MIMO radar with frequency diversity for range-dependent beamforming. The essence of the proposed technique is to divide the frequency diverse array transmit array into multiple subarrays, each subarray coherently transmits a distinct waveform with a small frequency increment across the array elements. Each subarray forms a directional beam and all beams are independently steerable by tuning the frequency increment. The subarrays jointly offer flexible operating modes and range-dependent beamforming. The beamforming performance as compared to phased-MIMO radar is examined by analyzing the transmit-receive beampatterns and the output signal-to-interference-plus-noise ratio. The effectiveness of the proposed technique is verified by numerical simulation results.
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