In this study, we consider a spectrum sharing architecture, wherein a multiple-input multiple-output communication system cooperatively coexists with a surveillance radar. The degrees of freedom for system design are the transmit powers of both systems, the receive linear filters used for pulse compression and interference mitigation at the radar, and the space-time communication codebook. The design criterion is the maximization of the mutual information between the input and output symbols of the communication system, subject to constraints aimed at safeguarding the radar performance. Unlike previous studies, we do not require any time-synchronization between the two systems, and we guarantee the radar performance on all of the range-azimuth cells of the patrolled region under signal-dependent (endogenous) and signal-independent (exogenous) interference. This leads to a non-convex problem, and an approximate solution is thus introduced using a block coordinate ascent method. A thorough analysis is provided to show the merits of the proposed approach and emphasize the inherent tradeoff among the achievable mutual information, the density of scatterers in the environment, and the number of protected radar cells.

中文翻译：

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杂乱环境下监视雷达与MIMO通信的联合设计

在这项研究中，我们考虑了一种频谱共享架构，其中多输入多输出通信系统与监视雷达协同共存。系统设计的自由度是两个系统的发射功率、用于雷达脉冲压缩和干扰抑制的接收线性滤波器，以及时空通信码本。设计标准是最大化通信系统输入和输出符号之间的互信息，受到旨在保护雷达性能的约束。与之前的研究不同，我们不需要两个系统之间的任何时间同步，并且我们保证在信号依赖（内源）和信号无关（外源）干扰下巡逻区域的所有距离-方位角单元的雷达性能。这导致了非凸问题，因此使用块坐标上升方法引入了近似解。提供了全面的分析以显示所提出方法的优点，并强调可实现的互信息、环境中散射体的密度和受保护雷达单元的数量之间的固有权衡。