Toward Dual-functional Radar-Communication Systems: Optimal Waveform Design
Toward Dual-functional Radar-Communication Systems: Optimal Waveform Design
复制标题
迈向双功能雷达通信系统：最佳波形设计
DOI：
10.1109/tsp.2018.2847648
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发表时间：
2018-08-15
影响因子：
5.4
通讯作者：
Petropulu, Athina
中科院分区：
文献类型：
--
作者：
Liu, Fan;Zhou, Longfei;Petropulu, Athina
研究了一种双功能多输入多输出(MIMO)雷达通信(RADCOM)系统，其中单个发射机具有多个天线，与下行蜂窝用户通信，同时检测雷达目标。为了最小化下行链路多用户干扰，考虑了几个设计准则。首先，我们考虑了全向波束方向图设计问题和定向波束方向图设计问题，得到了闭合形式的全局最优解。基于得到的波形，我们进一步考虑了针对雷达和通信性能之间的灵活折衷的加权优化，并引入了低复杂度的算法。此外，为了解决更实际的恒模波形设计问题，我们提出了一种获得全局最优解的分支定界算法，并推导出其最坏情况下的复杂度与最大迭代次数的函数关系。最后，通过数值结果对所提出的波形设计方法的有效性进行了评估。
We focus on a dual-functional multi-input-multi-output (MIMO) radar-communication (RadCom) system, where a single transmitter with multiple antennas communicates with downlink cellular users and detects radar targets simultaneously. Several design criteria are considered for minimizing the downlink multiuser interference. First, we consider both omnidirectional and directional beampattern design problems, where the closed-form globally optimal solutions are obtained. Based on the derived waveforms, we further consider weighted optimizations targeting a flexible tradeoff between radar and communications performance and introduce low-complexity algorithms. Moreover, to address the more practical constant modulus waveform design problem, we propose a branch-and-bound algorithm that obtains a globally optimal solution, and derive its worst-case complexity as function of the maximum iteration number. Finally, we assess the effectiveness of the proposed waveform design approaches via numerical results.