DTMB外辐射源雷达参考信号重构信道估计新方法

发布时间：2018-01-13 00:20

本文关键词：DTMB外辐射源雷达参考信号重构信道估计新方法　出处：《电子与信息学报》2017年05期 　论文类型：期刊论文

【摘要】：参考信号的稳健重构是数字波形外辐射源雷达的关键技术之一,其中信道估计的精度直接关系到重构参考信号的纯度。针对数字地面多媒体广播(DTMB)外辐射源雷达在接收系统基带采样率是信号符号速率非整数倍时所面临的参考信号重构质量问题,该文在压缩感知的匹配追踪算法基础上,提出一种改进的信道估计新算法。仿真分析表明,相比于广泛采用的时域相关法和最小二乘(LS)算法,改进后的算法有更好的频率适应性,鲁棒性高,在多种信道环境下表现优越。实测数据进一步验证了采用所提出的信道估计算法可较大提升参考信号的重构质量,从而有利于目标探测。
[Abstract]:The robust reconstruction of the reference signal is one of the key techniques of the digital waveform external radiation source radar . The accuracy of the channel estimation is directly related to the purity of the reconstructed reference signal . Based on the matching pursuit algorithm of the digital terrestrial multimedia broadcast ( DTMB ) , the improved channel estimation algorithm is proposed . The simulation results show that the improved algorithm has better frequency adaptability and high robustness compared to the widely adopted time domain correlation method and the least square ( LS ) algorithm . The measured data further verifies that the proposed channel estimation algorithm can greatly improve the reconstruction quality of the reference signal , thereby facilitating the target detection .

【作者单位】：武汉大学电子信息学院;
【基金】：国家重点研发计划(2016YFB0502403) 国家自然科学基金(61331012,61371197,U1333106,61271400) 湖北省支撑项目(2015BCE075) 博士后创新人才支持计划(BX201600117) 湖北省自然科学基金(2016CFA061)~~
【分类号】：TN957.51
【正文快照】： 近年来随着数字电视信号(数字视频广播DVB-T,中国移动多媒体广播CMMB,数字地面多媒体Foundation of China(61336102,61371197,61271400),The SupportProgram of Hubei Province(2015BCE075),The PostdoctoralInnovation Talent Support Program(BX201600117),The NaturalScien

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