| 直接序列扩频通信中基于时频域相关性的抗单音干扰算法 |
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| 引用本文： | 龚向阳,胡光锐.直接序列扩频通信中基于时频域相关性的抗单音干扰算法[J].上海交通大学学报,2003,37(6):820-823. |
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| 作者姓名： | 龚向阳 胡光锐 |
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| 作者单位： | 上海交通大学,电子工程系,上海,200030 |
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| 基金项目： | 国家自然科学基金资助项目 (60 172 0 18) |
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| 摘 要： | 直接序列扩频通信系统解扩以前采用干扰抑制算法可以显著增强抗窄带干扰性能。常用的干扰抑制方法为扩频信号建立平稳模型。本文通过分析扩频信号的产生机理，建立了扩频信号的循环平稳模型，采用频移滤波器(FRESH)同时利用时域相关性和谱相关来抑制单音干扰。仿真实验表明，FRESH滤波器相对于传统横向滤波器能够提高系统抗单音干扰性能。
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| 关 键 词： | 扩频通信 循环平稳信号 干扰抑制 |
| 文章编号： | 1006-2467(2003)06-0820-04 |
| 修稿时间： | 2002年5月11日 |
Interference Rejection Based on Correlation of Time and Frequency Domain in Direct Sequence Spread Spectrum Communication Systems |
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| GONG Xiang yang,HU Guang rui.Interference Rejection Based on Correlation of Time and Frequency Domain in Direct Sequence Spread Spectrum Communication Systems[J].Journal of Shanghai Jiaotong University,2003,37(6):820-823. |
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| Authors: | GONG Xiang yang HU Guang rui |
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| Abstract: | The narrowband interference rejection capability of a direct sequence spread spectrum (SS) system can be enhanced considerably by an interference rejection algorithm prior to correlating it with the pseudo noise (PN) sequence. Transversal filter models SS signal as stationary, i.e. to analyze signals in average sense. The SS signal was modeled as cyclostationary and FRESH filter was introduced to reject interference. The computer simulation shows that FRESH filter can improve the system performance considerably compared with conventional transversal filter. |
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| Keywords: | spread spectrum communication cyclostationarity signal interference rejection |
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