| 矩形二进相移键控窄带干扰抑制技术 |
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| 引用本文： | 龚向阳,胡光锐.矩形二进相移键控窄带干扰抑制技术[J].上海交通大学学报,2004,38(2):189-192. |
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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(60172018) |
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| 摘 要： | 对矩形二进相移键控(BPSK)窄带干扰以较高的扩频信号码片率进行采样，保留干扰的谱冗余，进一步建立了干扰的循环平稳模型，采用频移(FRESH)滤波器同时利用时域相关性和频域相关性来抑制窄带干扰．仿真实验表明，采用FRESH滤波器，相对于传统横向滤波器而言能够显著提高直接序列扩频通信系统抗窄带干扰性能。
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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(2004)02-0189-04 |
| 修稿时间： | 2003年1月23日 |
Interference Rejection Based on Spectral Correlation in DSSS Communication Systems |
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| GONG Xiang-yang,HU Guang-rui.Interference Rejection Based on Spectral Correlation in DSSS Communication Systems[J].Journal of Shanghai Jiaotong University,2004,38(2):189-192. |
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| Authors: | GONG Xiang-yang HU Guang-rui |
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| Abstract: | The periodical characteristic of chips makes rectangular BPSK narrowband interference not stationary but cyclostationary and cyclostationary signal. Moreover, as the chip rate of SS signal is much high than the baud rate of the interference, the baud rate correlated spectral correlation of the interference can be preserved. The narrowband interference was modeled as cyclostationary. Compared with the stationary model, this can preserve more information. Based on the cyclostationary model, FRESH filter was introduced and it can make use of both the correlation in time and frequency domain. The computer simulation shows that FRESH filter can improve the system performance considerably compared with conventional transversal filters. |
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| Keywords: | spread spectrum communication cyclostationarity interference rejection |
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