单载波频域均衡中的协作分集方法

Cooperative diversity in single carrier frequency domain equalization

摘要:

为了克服单载波频域均衡技术中多径衰落对无线通信质量的影响,提出了一种"均衡前向"的协作分集方法.在该方法中协作伙伴把接收到的信号经过频域均衡后再转发到目的节点,并且把"解码前向"与"均衡前向"相结合以提高系统性能.仿真结果表明,协作分集可以有效降低系统的错误概率,并且两种协作方法结合的方法可以比单一方法得到更大的分集增益.协作伙伴的信道状态决定了协作增益的大小,必须综合考虑多个参数来选择合适的协作伙伴.

Abstract:

To overcome the influence of multi-path fading in single carrier frequency domain equalization,this paper proposed "Equalization and Forward" method.In this method the partner equalizes the receiving signal in frequency domain and forward to destination.In addition,the "Equalization and Forward" and "Decoded and Forward" methods are combined to improve the performance,and the impact on cooperative performance of partners’ channel state information is analyzed.The simulation results show that the cooperative diversity can reduce error probability,and the combining method can provide larger diversity gain than single method.Partners’ channel state information determines the diversity gain,so various parameters should be considered to obtain best performance.