基于时延估计算法的透明转发器的实现方法(英文)  

Realization of transparent transponder based on time delay estimation

作　　者：敦鹏[1,2] 竺小松[1] 郑世才 

机构地区：[1]合肥电子工程学院 [2]65301部队64分队

出　　处：《太赫兹科学与电子信息学报》2013年第3期411-415,共5页Journal of Terahertz Science and Electronic Information Technology

摘　　要：讨论了转发器实现收发不间断的方法,提出了在自适应噪声相消的系统上,将简化的分数阶傅里叶变换理论应用于时延估计,进而将干扰信号重构抵消。推导了该算法,并提出基于该算法实现收发同时进行的转发器系统,即透明转发器。给出本系统模型框图,该透明转发器采用最小均方(LMS)算法建立自适应系统控制结构,能够通过自适应滤波器将自发干扰信号减除,并将不相关的背景噪声抵消。最后利用MATLAB软件仿真了基于该算法的透明转发器在具体信号上的运用,实验结果表明该方法实现了不间断转发功能,并且系统结构简单、易实现。This article discusses the method to realize transparent transponder that can receive as well as transmit signals uninterruptedly. A new algorithm is derived based on delay estimation from Reduced Fractional Fourier Transform（RFRFT） which is used for the reduction of interfering signal reconstruction. This algorithm applies RFRFT computing to the separation of spontaneous signals and received mixed-signals, and delay estimation is applied in spontaneous signal reconstruction by feedback signal. This transparent transponder bears an adaptive system model for interfering signal elimination including spontaneous signal by using of spontaneous signal reconstruction offset and other irrelevant background noises. Least-Mean-Square（LMS） algorithm is used to build the structure of this adaptive system, and the block diagram of this system model is given. Finally, MATLAB software is employed to simulate this algorithm. The results show that the noise elimination based on the proposed method is feasible, and the transparent transponder based on this adaptive system model can receive and transmit signals continually and uninterruptedly. As an additional advantage, this system bears a simple structure which is easy to be implemented.

关 键 词：简化的分数阶傅里叶变换(RFRFT) 时延估计 透明转发器 自适应控制系统 归一化LMS算法(NLMS) 

分 类 号：TN911.7[电子电信—通信与信息系统]