| 基于DFT的扩频信号抗窄带干扰算法的分析与仿真 |
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| 引用本文： | 刘鑫,刘涛.基于DFT的扩频信号抗窄带干扰算法的分析与仿真[J].电子质量,2013(7):19-23. |
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| 作者姓名： | 刘鑫 刘涛 |
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| 作者单位： | 1. 96548部队,河南三门峡,472000
2. 96657部队,北京,100011 |
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| 摘 要： | 直扩(DSSS)扩频方式本身具有极强抗干扰能力,基于DFT的窄带干扰抑制算法能够进一步提高扩频信号的抗干扰能力。比较了门限清零、门限钳位和干扰衰减三种干扰抑制算法的优劣,提出了窄带干扰抑制方案,分析了信号加窗与门限选择的作用,并仿真比较了三种算法的抗干扰效果:干扰衰减算法对有用信号的失真最小,是有效的窄带干扰抑制方法。
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| 关 键 词： | 直接序列扩频信号 窄带干扰 FFT |
Analysis and Simulation on a DFT-based Anti-narrowband-jamming Algorithm for DSSS Signal |
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| Liu Xin
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Liu Tao.Analysis and Simulation on a DFT-based Anti-narrowband-jamming Algorithm for DSSS Signal[J].Electronics Quality,2013(7):19-23. |
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| Authors: | Liu Xin Liu Tao |
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| Affiliation: | I.iu Xin＇,Uu Tao(1.Troops 96548 of PLA,Henan Sanmenxia 472000;2.Troops 96657 of PLA,Beijing 100011 ) |
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| Abstract: | The Direct-Sequence-Spread-Spectrum scheme embraces a strong anti-jamming capability and a DFT-based jamming suppressing algorithm can add to the security of DSSS signal.On the ground of a DFT-based anti-jamming algorithm a comparison among TZ,TC and interference lowering is given,and the effects of window function and threshold choosing are discussed.In conclusion,the interference lowering is the most effective narrowband jamming suppression algorithm since it does the least damage to the use- ful signal. |
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| Keywords: | DSSS signal narrow-band jamming FFT |
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