基于二次约束及用户组选择的双向中继网络
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摘要
针对多天线双向中继网络的吞吐量优化和干扰控制问题,提出一种二次约束的最小均方误差的中继方案和一种用户组选择方案.为了降低中继过程存在的干扰信号和接收端存在的自干扰,对中继端的预编码器和接收端的检测器同时进行优化,将最小化接收信号的平分误差转化为约束问题,再将约束问题反复优化直到局部最优.为了最大化系统总速率,采用贪婪算法对用户组进行选择,直到调度子集的用户组与中继端的天线数量相等.实验仿真结果表明,该算法在减小接收信号的总均方误差,提升系统总体吞吐量上具有较好的增益效果.
To solve the problem of the multi-antenna two-way relay network with throughput optimization and interference control,a minimum mean square error relay scheme of the quadratic constrained quadratic programming and a user group options scheme has been proposed.In order to reduce the interference from the relay process and the presence of interfering signals present in the receiver,the algorithm optimized relay end pre-coder and receiver detector at the same time,and the split error minimization of the received signal has been made into constraint problems,then the constraints optimization been repeatedly made until the local optimum.In order to maximize the system total rate,user groups to be selected by the greedy algorithm,until the scheduling the number of user groups and relay the antenna subset was equal.The experimental simulation results show that the algorithm has good gain effect on reducing divide the total error of received signal and improving the overall throughput.
To solve the problem of the multi-antenna two-way relay network with throughput optimization and interference control,a minimum mean square error relay scheme of the quadratic constrained quadratic programming and a user group options scheme has been proposed.In order to reduce the interference from the relay process and the presence of interfering signals present in the receiver,the algorithm optimized relay end pre-coder and receiver detector at the same time,and the split error minimization of the received signal has been made into constraint problems,then the constraints optimization been repeatedly made until the local optimum.In order to maximize the system total rate,user groups to be selected by the greedy algorithm,until the scheduling the number of user groups and relay the antenna subset was equal.The experimental simulation results show that the algorithm has good gain effect on reducing divide the total error of received signal and improving the overall throughput.
引文
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[12]ZHANG Sheng-Li,ZHOU Qing-Fa,KAI C H,et al.Full Diversity Physical-Layer Network Coding in Two-Way Relay Channels With Multiple Antennas[J].IEEE Transactions on Wireless Communications,2014,13(8):4273-4282.
[2]邓卫华,王闻今,金石,等.一种利用软信息网络编码在双向中继网络进行估计转发的方法[J].电子学报,2012,40(2):308-312.
[3]FAN Li-Sheng,LEI Xian-Fu,CHEN Hong-Bin,et al.Impact of Channel Estimation Error on Fixed-gain Two-way Relay Network with User/Antenna Selection[J].Transactions on Emerging Telecommunications Technologies,2014,25(5):490-495.
[4]CUI Hong-Yu,MA Meng,SONG Ling-Yang,et al.Relay Selection for Two-Way Full Duplex Relay Networks with Amplify-and-Forward Protocol[J].IEEE Transactions on Wireless Communications,2014,13(7):3768-3777.
[5]CHEN Zhi-Yong,LIU Hui.Spectrum-Efficient Coded Modulation Design for Two-Way Relay Channels[J].IEEE Journal on Selected Areas in Communications,2014,32(32):251-263.
[6]ZHAO Zhong-Yuan,PENG Mu-Gen,DING Zhi-Guo,et al.Denoise-and-Forward Network Coding for Two-Way Relay MIMO Systems[J].IEEE Transactions on Vehicular Technology,2014,63(2):775-788.
[7]国强,秦月.改进的基于网络编码中继转发方案[J].计算机应用,2016,36(1):61-65.
[8]吴湛击,高翔.简单高效的新型多向中继网络编码方法[J].北京航空航天大学学报,2015,41(9):1589-1594.
[9]WANG Jiang,XU Yong-Yu,XU Kui,et al.A User Grouping Based Opportunistic Network Coding Scheme for MultiUser Multi-Relay Uplink Transmissions[J].Wireless Personal Communications,2015,86(3):1629-1652.
[10]ALSHAROA A,GHAZZAI H,ALOUINI M S.Efficient Multiple Antenna-relay Selection Algorithms for MIMO Unidirectional-Bidirectional Cognitive Relay Networks[J].Transactions on Emerging Telecommunications Technologies,2016,27:170-183.
[11]AMERIMEHR M H,ASHTIANI F.Delay and Throughput Analysis of a Two-Way Opportunistic Network CodingBased Relay Network[J].IEEE Transactions on Wireless Communications,2014,13(5):2863-2873.
[12]ZHANG Sheng-Li,ZHOU Qing-Fa,KAI C H,et al.Full Diversity Physical-Layer Network Coding in Two-Way Relay Channels With Multiple Antennas[J].IEEE Transactions on Wireless Communications,2014,13(8):4273-4282.