一种单天线同频混合信号幅度的估计算法

针对非协作通信中平坦衰落条件下单天线接收两路MSK混合信号分量的幅度估计问题，提出了一种基于max-min思想的幅度盲估计算法。该算法采用混合信号幅值序列中多个极大极小幅值的估计值来进行混合信号分量的幅度估计，并采用加窗局部极值平均的方法来获得多个极大极小幅值的估计值。仿真结果表明：在信噪比大于10 dB条件下，该算法对MSK混合信号幅度估计较为准确，并且该算法对混合信号分量功率比和相对时延差的变化具有较强的鲁棒性，具有不需要数据辅助、计算量较小的优点，能够满足后续盲信号处理的需要。

An Amplitude Estimation Algoritm for Co-frequency Mixture with Single Antenna

For non cooperative communication,an amplitude estimation algorithm is proposed for two-way MSK mixing signals with single antenna under flat fading channel. Legions of maximum and minimum amplitudes of the mixture are obtained by caculating partial mean of maximum or minimum values within a window and applied to estimate amplitudes of signal components. Simulation results show its good performance when SNR is greater than 10dB and perfect robust performance for the changes of the power ratio between signal components and difference of time delay. As a non preamble aided algorithm with lower complexity,it is significant for following blind processing.