基于相位补偿的时域平均方法  

Time domain averaging based on phase compensations

作　　者：陈新华[1] 孙长瑜[1] 鲍习中[1] 

机构地区：[1]中国科学院声学研究所,北京100190

出　　处：《应用声学》2011年第4期268-274,共7页Journal of Applied Acoustics

摘　　要：本文提出了一种基于相位补偿的时域平均方法,通过对每段截取信号进行相位补偿消除非整数倍周期截取对时域平均方法性能的影响。该方法无需频率的先验知识和很高的采样频率,通过在一定的频率范围上进行搜索实现无相位误差的时域平均,且频率搜索范围只与信号截取长度有关。通过仿真证明了该方法的信号增益与理想情况下整周期截取的信号增益一致。This paper introduces a method of compensating. This method eliminates the effect to time domain averaging, based on phase the performance as a result of non integral times of signal periods truncating. Without the apriori information of the signal frequency and higher sampling frequency, it can realize the time domain averaging having no phase error through searching the frequencies, which is concerned with the length of the truncated signal only. The simulation results show that the signal gain is consistent with that of integral times of the period truncating.

关 键 词：时域平均 相位补偿 处理增益 

分 类 号：TN911.72[电子电信—通信与信息系统]