中文摘要：

本文提出一种适用于快衰落信道结构的模型变化检测算法．针对信号包络幅值寻找信道模型发生突变的采样时间点，运用动态规划（DP）方法推导了快衰落信道的模型变化检测的理论表达式，构造了信道的变结构模型切换准则．理论分析和仿真实验表明结合幅值变化检测，可有效地找出模型变化采样时问点，并在这些时间点对信道进行模型切换，使估计器达到了较好的估计精度．

英文摘要：

A new model changes detecting method in fast fading channel structure was proposed. The new method aimed at the amplitude of the signal to detect the sample time points that channel suddenly changed. It educed the theoretic expression of model changes detecting method in fast fading channel by dynamic programming （DP） algorithm , and constructed the principle of vary structure channel model switching. The result of theoretic analysis and simulation experiment show that the method can detect the sample time points of model changes effectua]]y by detecting the amplitude of the signal, and switch the channel model in these time points to approach a good estimator precision.