论文标题
关节雷达和多播 - 无菌通信：NOMA辅助框架
Joint Radar and Multicast-Unicast Communication: A NOMA Aided Framework
论文作者
论文摘要
研究了非正交多访问（NOMA）辅助关节雷达和多播 - unicast通信（RAD-MU-COM）的新型概念。采用相同的频谱资源，多输入 - 多功能输出（MIMO）双功能雷达通信（DFRC）基站检测以雷达为中心的用户（R-user），而将混合的多播式播种消息则传输到R-USER和Communication-use-user（c-user）。特别是，多播信息均针对R-和C用户，而单播信息仅针对C-User。更明确地，使用NOMA来促进这种双光谱共享，其中将多播和单播信号叠加在功率域中，并且叠加的通信信号也被利用为雷达探测波形。为具有单个R式用户和单个C用户的系统提出了基于波束形式的NOMA接头RAD-MU-COM框架。基于此框架，通过优化所使用的光束形式来提出单播率最大化问题，同时满足了多播的速率要求和雷达梁模式的预定义精度。由基于惩罚的迭代算法解决了最终的非凸优化问题，以找到高质量的近乎最佳解决方案。最后，我们的数值结果表明，在基准方案上提出的方案可以实现显着的性能提高。
The novel concept of non-orthogonal multiple access (NOMA) aided joint radar and multicast-unicast communication (Rad-MU-Com) is investigated. Employing the same spectrum resource, a multi-input-multi-output (MIMO) dual-functional radar-communication (DFRC) base station detects the radar-centric user (R-user), while transmitting mixed multicast-unicast messages both to the R-user and to the communication-centric user (C-user). In particular, the multicast information is intended for both the R- and C-users, whereas the unicast information is only intended for the C-user. More explicitly, NOMA is employed to facilitate this double spectrum sharing, where the multicast and unicast signals are superimposed in the power domain and the superimposed communication signals are also exploited as radar probing waveforms. A beamformer-based NOMA-aided joint Rad-MU-Com framework is proposed for the system having a single R-user and a single C-user. Based on this framework, the unicast rate maximization problem is formulated by optimizing the beamformers employed, while satisfying the rate requirement of multicast and the predefined accuracy of the radar beam pattern. The resultant non-convex optimization problem is solved by a penalty-based iterative algorithm to find a high-quality near-optimal solution. Finally, our numerical results reveal that significant performance gains can be achieved by the proposed scheme over the benchmark schemes.
