Signaling Strategies for the Hybrid MIMO Phased-Array Radar
Signaling Strategies for the Hybrid MIMO Phased-Array Radar
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DOI：
10.1109/jstsp.2009.2038968
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发表时间：
2010-01
影响因子：
7.5
通讯作者：
Daniel R. Fuhrmann;J. P. Browning;M. Rangaswamy
中科院分区：
文献类型：
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作者：
Daniel R. Fuhrmann;J. P. Browning;M. Rangaswamy
混合MIMO相控阵雷达(HMPAR)是一种多传感器雷达体系结构的概念，它结合了传统相控阵雷达的原理和新兴的多输入多输出(MIMO)雷达技术。HMPAR包括大量的T/R元件，MP个，被组织成每个P个元件的M个子阵列。在每个子阵中，使用无源单元级相移来以某种所需的方式引导发射和接收波束。M个子阵列中的每个子阵列依次由独立放大的相位编码信号驱动，该信号可以是准正交的、相位相干的或部分相关的。这种雷达系统可用于机载平台，同时执行搜索、探测和跟踪任务。本文考虑了在概念HMPAR体系结构中可以采用的各种信令策略，以实现由发射波束方向图和空时模糊函数量化的各种目标。首先，我们提出了一种为均匀线性和矩形阵列生成多个相关信号的方法，这些阵列在一维和二维上实现了任意矩形发射波束方向图，同时保持了期望的时间特性。对于MP=900个阵元的阵列，用不同的M和P值排列，给出了利用该技术可能的发射波束方向图范围的例子。然后，推导出适用于HMPAR雷达系统的空时或MIMO模糊函数。给出了使用一维HMPAR结构的信号模糊函数的例子，表明对于任意发射波束方向图，可以在接收时获得类似于相控阵的分辨率。
The hybrid MIMO phased array radar (HMPAR) is a notional concept for a multisensor radar architecture that combines elements of traditional phased-array radar with the emerging technology of multiple-input multiple output (MIMO) radar. A HMPAR comprises a large number, MP, of T/R elements, organized into M subarrays of P elements each. Within each subarray, passive element-level phase shifting is used to steer transmit and receive beams in some desired fashion. Each of the M subarrays are in turn driven by independently amplified phase-coded signals which could be quasi-orthogonal, phase-coherent, or partially correlated. Such a radar system could be used in an airborne platform for concurrent search, detect, and track missions. This paper considers various signaling strategies which could be employed in the notional HMPAR architecture to achieve various objectives quantified by transmit beampatterns and space-time ambiguity functions. First, we propose a method to generate multiple correlated signals for uniform linear and rectangular arrays that achieve arbitrary rectangular transmit beampatterns in one and two dimensions, while maintaining desirable temporal properties. Examples of the range of transmit beampatterns possible with this technique are illustrated for an array of MP=900 elements, arranged using different values of M and P. Then the space-time, or MIMO, ambiguity function that is appropriate for the HMPAR radar system is derived. Examples of ambiguity functions for our signals using a one-dimensional HMPAR architecture are given, demonstrating that one can achieve phased-array-like resolution on receive, for arbitrary transmit beampatterns.