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首页> 外文期刊>EURASIP journal on advances in signal processing >Low-complexity design of frequency-hopping codes for MIMO radar for arbitrary doppler
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Low-complexity design of frequency-hopping codes for MIMO radar for arbitrary doppler

机译：任意多普勒MIMO雷达跳频码的低复杂度设计

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摘要

There has been a recent interest in the application of Multiple-Input Multiple-Output (MIMO) communication concepts to radars. Recent literature discusses optimization of orthogonal frequency-hopping waveforms for MIMO radars, based on a newly formulated MIMO ambiguity function. Existing literature however makes the assumption of small target Doppler. We first extend the scope of this ambiguity function to large values of target Doppler. We introduce the concept of hit-matrix in the MIMO context, which is based on the hit-array, which has been used extensively in the context of frequency-hopping waveforms for phased-array radars. We then propose new methods to obtain near optimal waveforms in both the large and small Doppler scenarios. Under the large Doppler scenario, we propose the use of a cost function based on the hit-matrix which offers a significantly lower computational complexity as compared to an ambiguity based cost function, with no loss in code performance. In the small Doppler scenario, we present an algorithm for directly designing the waveform from certain properties of the ambiguity function in conjunction with the hit-matrix. Finally, we introduce weighted optimization wherein we mask the cost function used in the heuristic search algorithm to reflect the properties of the required ambiguity function.
机译：近来，人们对将多输入多输出（MIMO）通信概念应用于雷达有兴趣。最近的文献讨论了基于新制定的MIMO模糊度函数的MIMO雷达正交跳频波形的优化。但是，现有文献假设目标多普勒较小。我们首先将此模糊度函数的范围扩展到目标多普勒的较大值。我们在MIMO上下文中引入了命中矩阵的概念，该概念基于命中阵列，在相控阵雷达的跳频波形上下文中已被广泛使用。然后，我们提出了新的方法来在大型和小型多普勒场景中获得接近最佳的波形。在大型多普勒场景下，我们建议使用基于命中矩阵的成本函数，与基于歧义的成本函数相比，该函数提供了显着更低的计算复杂度，并且不会降低代码性能。在小型多普勒场景中，我们提出了一种算法，可以根据模糊函数的某些属性与命中矩阵直接设计波形。最后，我们引入加权优化，其中我们屏蔽了启发式搜索算法中使用的成本函数，以反映所需歧义函数的性质。

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