多用户对双向中继空频信道配对方案
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摘要
在基于OFDM的多用户对双向中继网络中,提出了一种空频信道配对的中继策略,以最大化和速率为目标,给出了一种较低复杂度的空频信道配对方案,通过进一步挖掘系统的频率分集和空间分集来提高系统性能。仿真结果表明,所提出的空频信道配对方案可以明显提高系统的和速率和误码率性能。
A two-way relay network is considered where multi-pair users conduct bidirectional communications via a central relay based on orthogonal frequency-division multiplexing( OFDM) transmission and a spatial-frequency channel pairing( SFCP) scheme is put forward.Focused on maximizing sum-rate,a new SFCP scheme with lower complexity is proposed to further exploit spatial and frequency diversity and boost system performance.Simulation results illustrate that the proposed SFCP scheme can improve the sum-rate and decrease the bit-error-rate of the system.
A two-way relay network is considered where multi-pair users conduct bidirectional communications via a central relay based on orthogonal frequency-division multiplexing( OFDM) transmission and a spatial-frequency channel pairing( SFCP) scheme is put forward.Focused on maximizing sum-rate,a new SFCP scheme with lower complexity is proposed to further exploit spatial and frequency diversity and boost system performance.Simulation results illustrate that the proposed SFCP scheme can improve the sum-rate and decrease the bit-error-rate of the system.
引文
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[11] Zhou Z K,Zhu Q. Joint Optimization Scheme for Power Allocation and Subcarrier Pairing in OFDM-based MultiRelay Networks[C]∥IEEE Communication Letter.2014,18(6):1039-1042.
[12] Liu Y,Tao M.Optimal Channel and Relay Assignment in OFDM-based Multi-relay Multi-pair Two-way Communication Networks[J]. Communications,IEEE Transactions on,2012,60(2):317-321.
[13]周洋.OFDM信号旁瓣抑制的星座修整法[J].指挥信息系统与技术,2016,7(2):28-32.
[2] Amah A U T,Klein A,Silva Y C B,et al.Multigroup Multicast Beamforming for Multiuser Two-way Relaying[C]∥International ITG Workshop on Smart Antennas WSA,Berlin,2009:34-29.
[3] Yilmaz E,Zakhour R,Gesbert D,et al.Multi-pair Two-way Relay Channel with Multiple Antenna Relay Station[C]∥IEEE International Conference on Communication(ICC),Cape Town,2010:1-5.
[4] Sun C,Li Y,Vucetic B,Yang C. Transceiver Design for Multi-user Multi-antenna Two-way Relay Channels[C]∥IEEE Global Telecommunications Conference(IEEE Globecom10),Miami,2010:6-10.
[5] Xing C,Li S,Fei Z,et al.How to Understand Linear Minimum Mean-square-error Transceiver Design for Multipleinput-multiple-output Systems from Quadratic Matrix Programming[J]. IET Communications,2013,7(12):1231-1242.
[6] Shu F,Lu Y Z,Chen Y,et al.High-sum-rate Beamformers for Multi-pair Two-way Relay Networks with Amplify-andforward Relaying Strategy[J]. Science China Information Sciences,2014,57(2):1-11.
[7] Shu F,Chen Y,You X H,et al. Low-complexity Optimal Spatial Channel Pairing for AF-based Multi-pair Two-way Relay Networks[J]. Science China Information Science,2014,57(10):1-10.
[8] Hammerstrom I,Wittneben A. On the Optimal Power Allocation for Nonregenerative OFDM Relay Links[C]∥Communications,2006.ICC'06.IEEE International Conference on IEEE,2006(10):4463-4468.
[9] Dang W,Tao M,Mu H,et al. Subcarrier-pair Based Resource Allocation for Cooperative Multi-relay OFDM Systems[J].Wireless Communications,IEEE Transactions on,2010,9(5):1640-1649.
[10] Li X,Zhang Q,Zhang G,et al.Joint Power Allocation and Subcarrier Pairing for Cooperative OFDM AF Multi-relay Networks[J]. Communications Letters,IEEE,2013,17(5):872-875.
[11] Zhou Z K,Zhu Q. Joint Optimization Scheme for Power Allocation and Subcarrier Pairing in OFDM-based MultiRelay Networks[C]∥IEEE Communication Letter.2014,18(6):1039-1042.
[12] Liu Y,Tao M.Optimal Channel and Relay Assignment in OFDM-based Multi-relay Multi-pair Two-way Communication Networks[J]. Communications,IEEE Transactions on,2012,60(2):317-321.
[13]周洋.OFDM信号旁瓣抑制的星座修整法[J].指挥信息系统与技术,2016,7(2):28-32.