In this paper, we investigate the problem of low probability of intercept (LPI)-based adaptive radar waveform optimization in signal-dependent clutter for joint radar and cellular communication systems, where the radar system optimizes the transmitted waveform such that the interference caused to the cellular communication systems is strictly controlled. Assuming that the precise knowledge of the target spectra, the power spectral densities (PSDs) of signal-dependent clutters, the propagation losses of corresponding channels and the communication signals is known by the radar, three different LPI based criteria for radar waveform optimization are proposed to minimize the total transmitted power of the radar system by optimizing the multicarrier radar waveform with a predefined signal-to-interference-plus-noise ratio (SINR) constraint and a minimum required capacity for the cellular communication systems. These criteria differ in the way the communication signals scattered off the target are considered in the radar waveform design: (1) as useful energy, (2) as interference or (3) ignored altogether. The resulting problems are solved analytically and their solutions represent the optimum power allocation for each subcarrier in the multicarrier radar waveform. We show with numerical results that the LPI performance of the radar system can be significantly improved by exploiting the scattered echoes off the target due to cellular communication signals received at the radar receiver.

中文翻译：

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在联合雷达和蜂窝通信系统的信号相关杂波中，基于截距的自适应雷达波形优化的可能性较低。

在本文中，我们研究了联合雷达和蜂窝通信系统在信号相关杂波中基于拦截（LPI）的自适应雷达波形优化的低概率问题，其中雷达系统优化了发射波形，从而对天线造成的干扰蜂窝通信系统受到严格控制。假设雷达知道目标频谱的精确知识，信号相关杂波的功率谱密度（PSD），相应信道的传播损耗和通信信号，提出了三种不同的基于LPI的雷达波形优化标准，以通过使用预定义的信噪比（SINR）约束和最小所需容量来优化多载波雷达波形，来最小化雷达系统的总发射功率。蜂窝通信系统。这些标准在雷达波形设计中考虑从目标散射的通信信号的方式有所不同：（1）作为有用能量，（2）作为干扰，或（3）完全忽略。通过分析解决了由此产生的问题，其解决方案代表了多载波雷达波形中每个子载波的最佳功率分配。