基于迭代的交叉信息融合频率估计方法  

A Cross Information Fusion Method Based on Iteration for Frequency Estimation

作　　者：苏丹[1] 涂亚庆[1] 罗健源[2] 李明[1] 

机构地区：[1]后勤工程学院信息工程系,重庆401311 [2]重庆通信学院信息工程系信息栅格实验室,重庆400035

出　　处：《四川大学学报（工程科学版）》2013年第4期156-162,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(61271449);重庆市自然科学基金资助项目(CSTC2011BA2015;CSTC2012JJA0877)

摘　　要：对工程中短时、低信噪比信号进行频率估计时,传统信息融合法存在抗噪性差、信息损失大、信息利用率低等不足,为此提出一种基于迭代的交叉信息融合频率估计方法。由相位关系确定粗测频率范围,在此范围内对交叉组合后的多段信号进行信息融合,得到交叉信息融合频谱,进而利用该频谱与单段信号频谱的关系进行迭代,得到新的交叉信息融合频谱,计算新交叉信息融合频谱的算术平均值实现频率估计。仿真结果表明,与现有方法相比,提出的算法在提高频率估计精度的同时,具有更好的抗噪性和鲁棒性,验证了其可行性和有效性。In order to overcome the disadvantage of traditional method such as poor noise immunity,excessive loss of information and low information utilization,a cross information fusion method based on iteration was proposed to improve frequency estimation accuracy.In this method,a frequency range was determined roughly by phase relationship,and cross information fusion spectra were obtained via fusing the multistage signals in this range.According to the relationship of the aforementioned spectra and single-stage signal spectra,new cross information fusion spectra were gained by iteration.Furthermore,frequency estimator was achieved by means of the arithmetic mean value of the new cross information fusion spectra.Simulation result showed that compared to the existing methods,the proposed method was superior in precision,noise immunity and robustness.

关 键 词：频率估计 交叉信息融合 融合频谱 迭代 平均频谱 

分 类 号：TN957[电子电信—信号与信息处理]