信道状态信息未知的MIMO中继系统无线信道容量分析  

Wireless Channel Capacity Analysis of MIMO RelaySystem with Unknown Channel StateInformation

作　　者：赵磊 ZHAO Lei(Guangzhou Metro Design&Research Institute Co.,Ltd,Guangzhou 510631)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510631

出　　处：《长江信息通信》2022年第7期38-41,共4页Changjiang Information & Communications

摘　　要：采用多节点协同中继系统模型的MIMO(multipleinput multipleoutput)系统,中继节点使用基于译码转发(DF)的方式进行传输的情况下,分析MIMO多节点中继系统模型采用随机特征值的概率密度函数表达式的遍历容量及采用随机矩阵函数时的上、下限边界。在发送节点的发送功率受限于P1,各中继节点发射功率分别受限于P2,信道状态信息未知的场景下,针对多点协同中继系统在带直传(DT)和不带直传(DT)的两种情况进行信道容量上、下限的推导和研究。在发射功率与中继节点功率受限的条件下,对信道容量与多节点中继系统的节点数量关系进行了分析,从而得出信道容量与中继节点数量成正相关关系的结论及其适用条件。同时,给出各节点总功率受限的场景下功率分配的最优解。In the MIMO(multiple input multiple output) multi-node relay system based on the relay protocol of decoding and retransmission, the expression of the probability density function of the disordered eigenvalues of the MIMO relay system and the closed solution obtained under the new random matrix theory are analyzed.In the scenario where the transmit power of the sending node and each relay node limited by P1/P2, the derivation and research of the upper and lower limits of the channel capacity are carried out in the cases of the multi-point cooperative relay system with or without direct transmission, while the channel status information is unknown. The relationship between the capacity and the number of relay nodes is analyzed, and the conditions required for the capacity to increase with the increase of the number of relay nodes are given, while the power limit is fixed. In the case where the sum of power limits is limited, the best allocation of two power limits is obtained.

关 键 词：MIMO 中继信道 信道状态信息 信道容量 

分 类 号：TN911[电子电信—通信与信息系统]