分布式无线通信系统中协同传输预编码方法分析

摘要

在分布式无线移动通信多点协同传输系统中,对于小区边缘用户而言,信道质量的恶化将导致系统接收性能的下降,为此,可以使用协同编码处理以提高接收质量.提出了一种协同传输联合预编码方法,系统针对协同的远端天线单元(RAU)进行联合处理,各RAU根据信道状态信息好坏采用不同的预编规则对同一用户发送数据,而在接收端使用最大比合并的方式对各链路信号进行处理.仿真实验结果表明,该方法能有效地改善用户的误码率性能,提高传输可靠性.%In distributed wireless communication and Coordinated Multi-Point ( CoMP) system, the deterioration of channel quality seriously affect the system receptivity of edge users, and therefore the coordinated coding processing is used to improve the quality of reception. A coordinated transmission and joint pre-coding method was proposed in this paper. Coordinated Remote Antenna Units (RAU) were processed jointly. According to the state information of channel, different pre-coding rules were adopted by each RAU to transmit data to the same user. A Maximal-Ratio Combining (MRC) algorithm was used to calculate the received signals of terminals. The simulation results show that the proposed method can effectively decrease the Bit Error Rate (BER) and improve the transmission reliability.