| 基于Radon-STFT的DSSS系统线性调频干扰抑制 |
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| 引用本文： | 陶然,耿鹏飞.基于Radon-STFT的DSSS系统线性调频干扰抑制[J].北京理工大学学报,2005,25(10):900-904. |
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| 作者姓名： | 陶然 耿鹏飞 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 基金项目： | 高等学校优秀青年教师教学科研奖励计划
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国家部委预研基金 |
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| 摘 要： | 提出了一种基于Radon-短时傅里叶变换(Radon-STFT)的直接序列扩频(DSSS)系统线性调频干扰的抑制方法.该方法只需估计得到线性调频干扰信号的初始频率和调频率即可进行有效的干扰抑制,使干扰抑制过程的复杂程度大为降低.性能分析和仿真实验表明,该方法可以在较大的动态范围内有效地抑制线性调频干扰.与基于STFT的抑制算法相比,其参数估计精度提高;与基于WHT的抑制算法相比,该方法在多分量条件下效果更为突出.
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| 关 键 词： | 直接序列扩频 LFM干扰 Radon-短时傅里叶变换 干扰抑制 |
| 文章编号： | 1001-0645(2005)10-0900-05 |
| 收稿时间： | 10 25 2004 12:00AM |
| 修稿时间： | 2004年10月25日 |
Linear Frequency Modulation Interference Detection and Suppression Based on Radon-STFT in Direct Sequence Spread Spectrum System |
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| TAO Ran and GENG Peng-fei.Linear Frequency Modulation Interference Detection and Suppression Based on Radon-STFT in Direct Sequence Spread Spectrum System[J].Journal of Beijing Institute of Technology(Natural Science Edition),2005,25(10):900-904. |
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| Authors: | TAO Ran and GENG Peng-fei |
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| Institution: | Department of Electronic Engineering, School of Information Science and Technology,Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A linear frequency modulation(LFM) interference suppression method in direct sequence spread spectrum(DSSS) receiver based on Radon-STFT is proposed.The method can restrain LFM interference by the initial frequency and chirp rate,making the process of interference suppression more easy.Performance analyses and simulation results showed that the proposed method works effectively in a large dynamic range.Compared with the STFT-based algorithm,it is more accurate.Compared with the WHT-based algorithm,it is more efficient especially in conditions of multicomponent LFM interferences. |
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| Keywords: | direct sequence spread spectrum(DSSS) LFM interference Radon-STFT interference suppression |
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