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基于分数阶傅里叶变换的混响抑制方法研究 被引量：23

A Study on Anti-reverberation Method Based on Fractional Fourier Transform
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摘要 线性调频(LFM)信号是声呐中一种常用信号。利用LFM信号在分数阶傅里叶变换(FRFT)域的良好聚焦性,提出了一种基于FRFT的混响抑制算法,在此算法中,通过分数阶Fourier域的窄带滤波来去除混响。对实测混响数据和LFM信号的分离效果进行了仿真,分离前后信混比得到了较大提高。 Linear frequeny modulation （LFM） signals are often used in sonars. Based on the fact that LFM signal has a good focusing property in the fractional Fourier transform （FRFT） domain, a novel anti-reverberation algorithm was presented. It is based on fractional Fourier transform, in which LFM signal is separated from the reverberation through a narrow-band filter in fractional Fourier domain. Thus the effect of the reverberation is readily subtracted from the received signal. With the actual reverberation data and the LFM pulse for separation, satisfactory results were obtained.
作者 邓兵 陶然 齐林 刘锋
机构地区 北京理工大学电子工程系
出处 《兵工学报》 EI CAS CSCD 北大核心 2005年第6期761-765,共5页 Acta Armamentarii
基金 国家自然科学基金资助项目(69972003)
关键词 信息处理技术 分数阶傅里叶变换 WIGNER-VILLE分布 混响 information processing technique FRFT WVD reverberation
分类号 TN911.2 [电子电信—通信与信息系统]
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参考文献17

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共引文献38

同被引文献173

引证文献23

二级引证文献57

兵工学报
2005年 第6期

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