In this paper, we investigate the spectral coexistence between a multiple-input multiple-output (MIMO) communication system and a MIMO radar which inspects multiple range gates with non-homogeneous interference. We consider two formulations for joint resource allocation, aiming at minimizing the inverse of the harmonic mean of the signal-to-interference-plus noise ratio (SINR) across the range gates inspected by the radar under a constraint on the communication mutual information or at minimizing a properly-weighted difference between the inverse of the harmonic mean of the SINR's and the mutual information, respectively. The degrees of freedom for system design are the radar probing signal, the radar receive filters at each range gate, and the communication codebook, under the usual constraints on the transmit power and on the similarity of the radar waveform to a reference signal. We derive a sub-optimal procedure that allows to decompose the non-convex optimizations at the hand into a sequence of simpler sub-problems. Numerical examples are provided to assess the merits of the proposed solutions.

中文翻译：

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距离相关干扰中的雷达和通信频谱共存


在本文中，我们研究了多输入多输出 (MIMO) 通信系统和检查具有非均匀干扰的多个距离门的 MIMO 雷达之间的频谱共存。我们考虑联合资源分配的两种公式，旨在在通信互信息的约束下或在雷达检查的距离门上最小化信号与干扰加噪声比（SINR）的调和平均值的倒数。分别最小化 SINR 调和平均值的倒数与互信息之间的适当加权差异。系统设计的自由度是雷达探测信号、每个距离门处的雷达接收滤波器以及通信码本，通常受到发射功率以及雷达波形与参考信号相似性的限制。我们推导出一个次优过程，允许将手头的非凸优化分解为一系列更简单的子问题。提供了数值示例来评估所提出的解决方案的优点。