基于多径信道传播特征，分析了移动接收机相对于远端数字电视（DTV）发射台以非匀速运动时所引起的微多普勒效应。为了准确分离与提取DTV接收信号中多个信号分量的微多普勒值，提出了支持向量聚类算法，对接收信号的分数阶傅里叶变换结果进行聚类分析，实现多个微多普勒分量的同步检测与准确估计。仿真结果表明，该方法能从噪声中分离、提取与估计源于DTV单频网各个发射台、不同路径的多个信号分量的微多普勒值，具有较好的实用性。

Micro doppler effect induced by non uniform motion of mobile receiver via faraway DTV transmit station was analyzed based on multipath channel propagation characteristics. To accurately separate and extract micro Doppler values of multiple signal components in DTV received signals, the support vector clustering (SVC) algorithm was applied. By using FRFT transform results of the received signal, clustering analysis was conducted, and synchronous detection and accurate estimation of multiple micro doppler components was realized. The simulation results showed that the method proposed can separate, extract and estimate micro doppler values of multiple signal components from different paths and different DTV transmit stations under single frequency network.