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工程科学与技术:2013,45(4):156-162
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基于迭代的交叉信息融合频率估计方法
(1.后勤工程学院 信息工程系;2.重庆通信学院 信息工程系 信息栅格实验室)
A Cross Information Fusion Method Based on Iteration for Frequency Estimation
(1.Dept. of Info. Eng.,Logistical Eng. Univ.;2.Chongqing Key Lab. of Emergency Communication,Dept. of Info. Eng.)
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投稿时间:2013-03-09    修订日期:2013-05-31
中文摘要: 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。
Abstract: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.
文章编号:201300154     中图分类号:    文献标志码:
基金项目: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)
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苏丹,涂亚庆,罗健源,李明.基于迭代的交叉信息融合频率估计方法[J].工程科学与技术,2013,45(4):156-162.
Su Dan,Tu Yaqing,Luo Jianyuan,Li Ming.A Cross Information Fusion Method Based on Iteration for Frequency Estimation[J].Advanced Engineering Sciences,2013,45(4):156-162.