| 扫频干扰的自适应时变抑制研究 |
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| 引用本文： | 夏彩杰,王爱华,安建平.扫频干扰的自适应时变抑制研究[J].计算机工程,2008,34(4):37-39. |
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| 作者姓名： | 夏彩杰 王爱华 安建平 |
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| 作者单位： | 北京理工大学信息科学技术学院,北京,100081 |
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| 摘 要： | 在DSSS系统中，提出一种基于修正离散Chirp-Fourier变换(MDCFT)的扫频干扰自适应时变抑制算法。该算法采用MDCFT估计扫频干扰的参数，构造了实时性强的自适应时变干扰剔除器，推导了MDCFT检测扫频干扰的输出信噪比的闭合表达式。与Wigner-Hough变换(WHT)估计扫频干扰时的非线性损失相比，输出信噪比提高了3 dB，并给出了误码率的闭合表达式。数值仿真表明了理论分析的正确性和该方法的有效性。
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| 关 键 词： | 离散Chirp-Fourier变换 自适应时变剔除器 扫频干扰 |
| 文章编号： | 1000-3428（2008）04-0037-03 |
| 收稿时间： | 2007-05-13 |
| 修稿时间： | 2007年5月13日 |
Research on Adaptive Time-varying Suppression of Frequency Sweeping Interference |
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| XIA Cai-jie,WANG Ai-hua,AN Jian-ping.Research on Adaptive Time-varying Suppression of Frequency Sweeping Interference[J].Computer Engineering,2008,34(4):37-39. |
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| Authors: | XIA Cai-jie WANG Ai-hua AN Jian-ping |
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| Affiliation: | (School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081) |
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| Abstract: | In DSSS communications system, this paper proposes an adaptive method for suppressing frequency sweeping interferences. The adaptive time-varying interference excision filter is constructed based on the interference parameter estimated by MDCFT. A closed form expression is found for the output of signal-to-noise ratio. Compared with the nonlinear loss of WHT, 3-dB is improved. The error probability in a closed form is expressed, and numerical simulation shows the exactness of the theoretical analysis and the validity of the method. |
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| Keywords: | discrete Chirp-Fourier transform adaptive time-varying excision sweeping interference |
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