论文部分内容阅读
基站节点间回程链路的有限容量制约着蜂窝移动通信系统中多点协作网络的性能。为了有效利用回程链路容量资源,提高节点协作增益,该文以上行多用户的两节点协作网络单元为研究对象,提出了一种基于压缩—转发及用户配对的多点协作多载波传输方式;建立了在回程链路容量有限的约束下,用户配对、载波映射、压缩噪声设计及载波间回程链路容量分配的联合优化问题;提出了一种基于轮换优化的低复杂度求解算法。仿真结果表明:与随机及均等资源分配方法相比,该算法可在有限回程链路容量条件下有效提高网络的和速率。
The limited capacity of backhaul links between base station nodes restricts the performance of multi-point cooperative networks in cellular mobile communication systems. In order to effectively utilize backhaul link capacity resources and increase node cooperation gain, a multi-point cooperative multi-carrier transmission scheme based on compression-forwarding and user pairing is proposed in this paper. A joint optimization problem of user pairing, carrier mapping, compressed noise design and capacity allocation of backhaul link between carriers is established under the constraints of backhaul link capacity. A low complexity solution algorithm based on rotation optimization is proposed. The simulation results show that compared with the random and equal resource allocation methods, the proposed algorithm can effectively improve the network rate under the limited backhaul link capacity.