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针对由Device-to-Device(D2D)通信系统和传统蜂窝通信系统组成的混合网络,提出了一种基于干扰对齐(Interference Alignment,IA)的D2D功率分配算法(Interference Alignment-Power Allocation,IA-PA).利用干扰对齐方法,将混合网络中的k对D2D用户的干扰信道等效为k对互不干扰的MIMO信道,并证明了干扰对齐解的存在性.其次,基于贪婪思想,提出了一种最优功率分配算法——IA-PA.与传统蜂窝通信系统相比,IA-PA使得混合网络的总自由度提高了(k-1)/2倍.仿真表明,所提出的功率分配算法有效地抑制了混合网络的互干扰,并得到更大的系统总速率.
For a hybrid network composed of a Device-to-Device (D2D) communication system and a traditional cellular communication system, an Interference Alignment-Power Allocation (IA-PA ). Using the method of interference alignment, the interference channel of k to D2D users in hybrid networks is equivalent to a MIMO channel without interference to each other, and the existence of interference alignment solution is proved.Secondly, based on the greedy idea, a IA-PA. Compared with the traditional cellular communication system, IA-PA makes the total degree of freedom of the hybrid network increased by (k-1) / 2 times. Simulation results show that the proposed power allocation algorithm Effectively suppress the mutual interference of the hybrid network and obtain a larger total system rate.