Phased-MIMO Radar: A Tradeoff Between Phased-Array and MIMO Radars
Phased-MIMO Radar: A Tradeoff Between Phased-Array and MIMO Radars
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DOI：
10.1109/tsp.2010.2043976
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发表时间：
2010-06-01
影响因子：
5.4
通讯作者：
Vorobyov, Sergiy A.
中科院分区：
文献类型：
--
作者：
Hassanien, Aboulnasr;Vorobyov, Sergiy A.
本文提出了一种新的多输入多输出（MIMO）共置天线雷达技术，我们称之为相控MIMO雷达。该技术在不牺牲相控阵雷达发射端相干处理增益这一主要优点的前提下，充分发挥了MIMO雷达的优点。所提出的技术的本质是将发射阵列划分为允许重叠的多个子阵列。然后，每个子阵列用于相干地发送与由其它子阵列发送的波形正交的波形。相干处理增益可以通过为每个子阵列设计权向量来实现，以形成朝向空间中某个方向的波束。此外，子阵列联合组合以形成MIMO雷达，从而产生更高的角分辨率能力。与相控阵和MIMO雷达技术相比，所提出的相控MIMO雷达技术提供了实质性的改进，并通过分析相应的波束图和可实现的输出信号与噪声加干扰比的仿真来证明。分析和仿真结果验证了所提出的相控MIMO雷达的有效性。
We propose a new technique for multiple-input multiple-output (MIMO) radar with colocated antennas which we call phased-MIMO radar. The new technique enjoys the advantages of the MIMO radar without sacrificing the main advantage of the phased-array radar which is the coherent processing gain at the transmitting side. The essence of the proposed technique is to partition the transmit array into a number of subarrays that are allowed to overlap. Then, each subarray is used to coherently transmit a waveform which is orthogonal to the waveforms transmitted by other subarrays. Coherent processing gain can be achieved by designing a weight vector for each subarray to form a beam towards a certain direction in space. Moreover, the subarrays are combined jointly to form a MIMO radar resulting in higher angular resolution capabilities. Substantial improvements offered by the proposed phased-MIMO radar technique as compared to the phased-array and MIMO radar techniques are demonstrated analytically and by simulations through analyzing the corresponding beampat-terns and the achievable output signal-to-noise-plus-interference ratios. Both analytical and simulation results validate the effectiveness of the proposed phased-MIMO radar.