NOMA增强型D2D通信的资源分配算法

传统蜂窝网络中，多址接入技术起着尤为关键的作用，与正交多址（Orthogonal Multiple Access，OMA）技术相比，非正交多址（Non-Orthogonal Multiple Access，NOMA）能够支持的用户数量远远超过可用正交资源的数量，可以达到更高的频谱效率和用户公平性。因此，为提高异构蜂窝网络的整体容量，本文研究了NOMA增强型设备到设备（Device to Device,D2D）的资源分配问题，并将其分解为两个独立的子问题:信道分配和功率控制。一方面，基于Coalition博弈为D2D组分配合适的信道；另一方面，对D2D发送功率和功率分配因子依据可行解域进行联合优化，以最大化整个网络中D2D可实现速率。仿真结果表明所提算法在保证系统性能的同时，还可以有效降低计算复杂度。 

NOMA enhanced D2D communication resource allocation algorithm

In traditional cellular networks, multiple access technology plays a particularly critical role. Compared with Orthogonal Multiple Access (OMA) technology, The number of supported users using Non-Orthogonal Multiple Access (NOMA) far exceeds the number of available orthogonal resources, which can achieve higher spectrum efficiency and user fairness. Therefore, in order to improve the overall capacity of heterogeneous cellular networks, this paper studied the resource allocation problem of NOMA enhanced device to device (D2D) and decomposes it into two independent sub-problems: channel allocation and power control. On the one hand, the D2D group was allocated appropriate channels based on the Coalition game; on the other hand, the D2D transmission power and power allocation factor were jointly optimized according to the feasible solution domain to maximize the D2D achievable rate in the entire network. The simulation results show that the proposed algorithm can effectively reduce the computational complexity while ensuring the performance of the system.