| 扩频系统频域窄带干扰抑制算法加窗损耗研究 |
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| 引用本文： | 曾祥华,李峥嵘,王飞雪.扩频系统频域窄带干扰抑制算法加窗损耗研究[J].电子与信息学报,2004,26(8):1276-1281. |
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| 作者姓名： | 曾祥华 李峥嵘 王飞雪 |
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| 作者单位： | 国防科技大学卫星导航定位研发中心,长沙,410073;国防科技大学卫星导航定位研发中心,长沙,410073;国防科技大学卫星导航定位研发中心,长沙,410073 |
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| 摘 要： | 扩频系统频域抗干扰算法通常采用数据加窗降低截断引起的频谱泄漏，采用数据重叠降低加窗带来的信噪比损耗。该文分析了数据加窗带来的信噪比损耗，研究了采用数据重叠后的信号合成输出问题，在Capozza(2000)的重叠选择输出方法的基础上提出了一种重叠相加输出方法。理论分析和仿真结果表明，与重叠选择输出方法相比，重叠相加输出方法减小了数据加窗引入的信噪比损耗，代价是增加了少量的加法运算。
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| 关 键 词： | 频域抗干扰 加窗损耗 重叠 数据合成 |
| 文章编号： | 1009-5896(2004)08-1276-06 |
| 收稿时间： | 2003-4-19 |
| 修稿时间： | 2003年4月19日 |
Study on Windowing Degradation of Frequency Domain Narrowband Interference Suppression Algorithms in Spread Spectrum System |
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| Zeng Xiang-hua,Li Zheng-rong,Wang Fei-xue.Study on Windowing Degradation of Frequency Domain Narrowband Interference Suppression Algorithms in Spread Spectrum System[J].Journal of Electronics & Information Technology,2004,26(8):1276-1281. |
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| Authors: | Zeng Xiang-hua Li Zheng-rong Wang Fei-xue |
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| Affiliation: | Satellite Navigation and Positioning R&D Center National Univ. of Defense Tech.,Changsha 410073 China |
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| Abstract: | In spread spectrum system, frequency-domain interference suppression algorithms always use data windows to reduce the spectral leakage associated with truncation, and employ overlap to lessen the SNR degradation due to windowing. In this paper, the windowing degradation and the data composing are studied. An improved method has been put forward to compose the data after overlap based on Capozza's(2000) method. The analyzed and simulated results show that the new method leads to a less SNR degradation than Capozza's method at the cost of a few more addition. |
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| Keywords: | Frequency-domain interference suppression Windowing degradation Overlap Data composing |
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