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基于时频加窗短时傅里叶变换的LFM干扰抑制

张玉恒 吴启晖 王金龙

张玉恒, 吴启晖, 王金龙. 基于时频加窗短时傅里叶变换的LFM干扰抑制[J]. 电子与信息学报, 2007, 29(6): 1361-1364. doi: 10.3724/SP.J.1146.2005.01315
引用本文: 张玉恒, 吴启晖, 王金龙. 基于时频加窗短时傅里叶变换的LFM干扰抑制[J]. 电子与信息学报, 2007, 29(6): 1361-1364. doi: 10.3724/SP.J.1146.2005.01315
Zhang Yu-heng, Wu Qi-hui, Wang Jin-long. LFM Interference Suppression Using Time-Frequency Windowed Short-Time Fourier Transform[J]. Journal of Electronics & Information Technology, 2007, 29(6): 1361-1364. doi: 10.3724/SP.J.1146.2005.01315
Citation: Zhang Yu-heng, Wu Qi-hui, Wang Jin-long. LFM Interference Suppression Using Time-Frequency Windowed Short-Time Fourier Transform[J]. Journal of Electronics & Information Technology, 2007, 29(6): 1361-1364. doi: 10.3724/SP.J.1146.2005.01315

基于时频加窗短时傅里叶变换的LFM干扰抑制

doi: 10.3724/SP.J.1146.2005.01315

LFM Interference Suppression Using Time-Frequency Windowed Short-Time Fourier Transform

  • 摘要: 通过对线性调频(LFM)信号分数阶傅里叶变换的分析,该文提出了一种基于时频加窗短时傅里叶变换(TFW-STFT)的LFM干扰抑制算法。由于提出的时频窗对LFM干扰具有较好的频域能量聚集性能,因此TFW-STFT对信号的影响要小于无聚集性能的短时傅里叶变换。仿真结果证明该算法在信噪比损失和系统误比特率上明显优于基于短时傅里叶变换的算法。
  • Buzzi S, Lops M, and Poor H V. Code-aided interference suppression for DS/CDMA overlay systems[J].Proc. IEEE.2002, 90(3):394-435[2]Barbarossa S and Scaglione A. Adaptive time varying cancellation of wide band interference in spread spectrum communications based on time frequency distributions[J].IEEE Trans. on Signal Proc.1999, 47(4):957-964[3]朱春华, 穆晓敏. DSSS 系统中线性调频干扰抑制技术研究. 电波科学学报, 2003, 18(3): 341-345. Zhu Chun-hua, Mu Xiao-min. Linear frequency-modulated interference rejection techniques in spread spectrum communication systems. Chinese Journal of Radio Science, 2003, 18(3): 341-345.[4]Amin M. Interference mitigation in spread spectrum communications system using time frequency distributions[J].IEEE Trans. on Signal Proc.1997, 45(1):90-101[5]齐林, 陶然, 周思永等. DSSS系统中基于分数阶傅立叶变换的扫频干扰抑制算法. 电子学报, 2004, 32(5): 799-802. Qi Lin, Tao Ran, and Zhou Si-yong, et al.. Frequency sweeping interference suppressing in dsss system using fractional Fourier transform. Acta Electronica Sinica, 2004, 32(5): 799-802.[6]Ouyang X and Amin M. Short-time Fourier transform receiver for nonstationary interference excision in direct sequence spread spectrum communication[J].IEEE Trans. on Signal Proc.2001, 49(4):851-863[7]孙晓兵, 保铮. 分数阶Fourier变换及其应用. 电子学报, 1996, 24(12): 60-65.[8]Almeida L B. The fractional Fourier transform and time-frequency representations[J].IEEE Trans. on Signal Proc.1994, 42 (11):3084-3090[9]Ozaktas H M, Kutay M A, and Bozdagi G. Digital computation of the fractional Fourier transform[J].IEEE Trans. on Signal Proc.1996, 44:2141-2150
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出版历程
  • 收稿日期:  2005-10-19
  • 修回日期:  2006-03-27
  • 刊出日期:  2007-06-19

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