| 摘要: |
| 直扩（DS）信号功率谱密度（PSD）低，通常伴有干扰，因此在截获其中的信息时，需要把干扰也考虑在内，为此，提出了一种方法，充分利用直扩信号的特点和梳状滤波器的特殊频率响应特性，在小信噪比和小信干比的情况下有效截获直扩信号中的扩谱码，从而截获信息。 |
| 关键词: 直接序列扩谱 信号截获 相关 滤波 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:July 25, 2005Revised:September 28, 2005 |
| 基金项目: |
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| Interception of DS Signal with Interference and Noise |
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| Abstract: |
| The PSD(power spectrum density) of DS signal,always jammed,is quite thin.So it is necessary to consider both noise and interference when trying to intercept DS information.Utilizing the characteristics of DS signal and comb filter,this paper presents a method that can extract the code for spread spectrum in small SNR and SIR environment,so as to detect the hidden information in DS signal. |
| Key words: DS signal interception correlation filtering |
