| 基于自适应小波包变换的直接序列扩频通信窄带干扰抑制技术 |
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| 引用本文： | 杨慰民,毕光国. 基于自适应小波包变换的直接序列扩频通信窄带干扰抑制技术[J]. 通信学报, 1999, 20(7): 2-75 |
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| 作者姓名： | 杨慰民 毕光国 |
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| 作者单位： | 1. 福建省移动通信局,福州,350001
2. 东南大学无线电工程系,南京,210096 |
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| 摘 要： | 本文提出一种基于小波包变换的直接序列扩频通信窄带（单、多音）干扰抑制技术。该技术通过小波包分解将信号和干扰分离，然后再对滤波处理后的分解结果进行小波包合成，以此达到窄带干扰去除的目的。文中对这种方案的性能进行了分析并给出了仿真结果。结果表明，与传统的方法相比，它具有较好的误比特率性能，较快的干扰定位速度和简单的计算复杂度。是宽带系统中行之有效的窄带干扰抑制方法，尤其适合于窄带干扰以近似于比特率的速度快速变化的场合。
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| 关 键 词： | 自适应小波包变换 窄带干扰抑制 功率谱密度 能量聚集度 |
Rejection of Narrowband Interference in DSSS Systems Based on Adaptive Wavelet Packet Transform |
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| Yang Weimin,Bi Guangguo. Rejection of Narrowband Interference in DSSS Systems Based on Adaptive Wavelet Packet Transform[J]. Journal on Communications, 1999, 20(7): 2-75 |
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| Authors: | Yang Weimin Bi Guangguo |
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| Abstract: | A new adaptive narrowband interference(single/multiple tone)rejection method based on wavelet packet transform(WPT)in DSSS systems is presented in this paper.The interference is firstly well located through wavelet packet decomposition,then excised in proper frequency domain in synthesis procedure Performance analysis and simulation are also shown at the final Compared with the conventional NBI rejector,it is superior in performance,NBI localization speed and computational complexity It is a viable mean for suppressing narrowband interference in a wideband signal In particular,it can excise the time variant interference which varies as fast as bit rate |
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| Keywords: | adaptive WPT narrowband interference rejection power spectrum density energy compaction measure |
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