基于扩展加权分数阶傅里叶变换的移动通信系统研究

Research on mobile communication system based on extended weighted-type fractional Fourier transform

基于扩展加权分数阶傅里叶变换(Extended Weighted-type Fractional Fourier Transform,EWFRFT)的两分量信号是一种新的信号形式,具备抗信道衰落的能力,但缺乏更多角度讨论和理论分析.首先对线性处理的两分量信号性能进行深入分析,提出用最大似然检测和连续干扰消除算法解调两分量信号,分别以不同研究角度对这两种算法的作用进行了理论解释.通过两分量信号通信系统中接收处理算法的讨论,丰富了两分量信号的接收处理方法 .仿真结果表明:所提方法提高了两分量信号通信的可靠性.

The double-component signal based on the Extended Weighted-type Fractional Fourier Transform(EWFRFT) is a novel transmition scheme with anti-fading ability. However, thorough discussions and deeper theoretical analyses are barely reported. This paper further conducts in-depth analysis on the linear processing method in double-component scheme. In addition, the maximum likelihood detection and successive interference cancellation algorithm are proposed in the demodulation of double-component signal, and their theoretical mechanism are demonstrated from different perspectives. By analysis of multiple receiving and processing algorithms for double-component signal transmission, this paper enriches the receiving techniques of double-component scheme, and simulation results show that the proposed method improves the reliability of double-component signal transmission.