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一种单天线同频混合信号幅度的估计算法
徐彬,芮国胜,陈必然
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(海军航空工程学院电子信息工程系,山东烟台 264001;海军驻成都地区军事代表室, 成都 610036)

摘要:

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。

关键词: 非协作通信 MSK混合信号幅度估计平坦衰落信道单天线

DOI：

基金项目:泰山学者建设专项基金资助项目

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

XU Bin,RUI Guo-sheng,Chen Bi-ran

(Electronic Information Engineering Department,Naval Aeronautical and Astr onautical University, Yantai 264001, China;Navy Military Representative Office in Chengdu, Chengdu 610036, China)

Abstract:

For noncooperative communication,an amplitude estimation a lgorithm is proposed for two-way MSK mixing signals with single antenna u n der flatfading channel. Legions of maximum and minimum amplitudes of the mixtu r e are obtained by caculating partial mean of maximum or minimum values within a window and applied to estimate amplitudes of signal components. Simulation resu lts show its good performance when SNR is greater than 10dB and perfect robust p erformance for the changes of the power ratio between signal components and diff erence of timedelay. As a nonpreamble aided algorithm with low er complexity,it is significant for following blind processing.

Key words: non-cooperative communication MSK mixture amplitude es timation flat-fading channel single antenna