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提出一种多天线多播系统中最大化多播系统容量的资源分配算法.考虑一个包含多个多播组的多天线无线多播场景,针对资源分配与下行链路预编码展开研究,给出资源受限且各多播组遵循最少子载波数限制时多天线多播系统资源分配的目标函数.为降低运算复杂度,提出一个3阶段的次优解法,将多播预编码、子载波分配和功率分配分别实现.仿真结果表明,无论是在单播系统还是组播系统中,所提算法都能够在保证组间公平的同时显著提高系统的吞吐量.
This paper proposes a resource allocation algorithm for maximizing the capacity of a multicast system in a multi-antenna multicast system.Considering a multi-antenna wireless multicast scenario with multiple multicast groups, this paper studies resource allocation and downlink precoding, The objective function of resource allocation of multi-antenna multicast system with limited resources and each multicast group follows the limit of the number of subcarriers.In order to reduce the computational complexity, a 3-stage suboptimal solution is proposed to allocate multicast precoding, subcarrier allocation And power allocation respectively.The simulation results show that the proposed algorithm can improve the throughput of the system remarkably while guaranteeing the fairness among the groups both in the unicast system and the multicast system.