哈尔滨工程大学学报2012，Vol.33Issue(10)：1310-1314,5.DOI:10.3969/j.issn.1006-7043.201101032
基于mTD-FrFT的VMFS-LFM信号参数估计方法
Parameters estimation methods of VMFS-LFM signals based on mTD-FrFT
摘要
Abstract
The parameters estimation performance of very minimum frequency shift linear frequency modulation ( VMFS-LFM) signal based on fractional fourier transform ( FrFT) is low due to the absolute value of VMFS-LFMs parameters in FrFT domain are be close to 1. To solve this question, two parameters estimation methods of VMFS-LFM signal based on m time decimation-FrFT(mTD-FrFT) were proposed, which m-time decimation was used as preprocessing methods. Theoretical analysis and simulation results showed that preprocessing of m-time decimation increased resolution ratio of frequency modulation slope of VMFS-LFM signal and multi-component LFM signals with similar parameters in FrFT domain, and the accuracy of parameters estimation methods were increased.关键词
甚小频偏线性调频信号/相近参数多分量LFM信号/参数估计/分数傅里叶变换/m倍抽取Key words
very minimum frequency shift frequency shift (VMFS-LFM) / multi-component LFM signals with similar parameters/ parameters estimation/ Fractional Fourier Transform ( FRFT) / m Time Decimation ( mTD )分类
信息技术与安全科学引用本文复制引用
孙志国,李迎,陈晶,申丽然,郭黎利..基于mTD-FrFT的VMFS-LFM信号参数估计方法[J].哈尔滨工程大学学报,2012,33(10):1310-1314,5.基金项目
国家自然科学基金资助项目(61101141) （61101141）
轨道交通控制与安全国家重点实验室开放课题基金资助项目(RCS2001K009):国防863创新基金资助项目(2010AAJ303) （RCS2001K009）
黑龙江省自然科学基金资助项目(F201040). （F201040）
