arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.09074eess.SPcs.ITmath.IT
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雷达-通信频谱共享中的能量效率优化

Energy Efficiency Optimization in Radar-Communication Spectrum Sharing

Emanuele Grossi, Marco Lops, Luca Venturino

摘要:

能源效率,可能再加上基于认知和频谱共享的架构,是5G及更高标准中绿色通信的关键技术。在这种情况下,本文认为,多输入多输出通信系统协同共存的监视雷达:目标函数是通信系统的能量效率,而雷达操作是通过约束最小接收信号干扰比为一组的距离-方位角单元的受控场景,并没有时间同步之间的假设。自由度是两个系统的发射功率、空时通信码本和雷达接收机处的线性滤波器。由于目标函数和信号相关干扰(杂波)的存在,所产生的优化问题是非凸的:我们开发了一个块坐标上升近似解,并提供了一个全面的性能评估,以便得出所提出的方法的优点,以及可实现的能量效率,环境中散射体的密度,以及受保护的雷达单元组的大小。

英文摘要:

Energy efficiency, possibly coupled with cognition-based and spectrum-sharing architectures, is a key enabling technology for green communications in 5G-and-beyond standards. In this context, the present paper considers a multiple-input multiple-output communication system cooperatively coexisting with a surveillance radar: the objective function is the communication system energy efficiency, while radar operation is safeguarded by constraining the minimum received signal-to-disturbance ratio for a set of range-azimuth cells of the controlled scene, and no time synchronization between them is assumed. The degrees of freedom are the transmit powers of both systems, the space-time communication codebook and the linear filters at the radar receiver. The resulting optimization problem is non-convex, due to both the objective function and the presence of signal-dependent interference (clutter): we develop a block-coordinate-ascent approximate solution, and offer a thorough performance assessment, so as to elicit the merits of the proposed approach, along with the interplay among the achievable energy efficiency, the density of scatterers in the environment, and the size of the set of protected radar cells.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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