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| 一种基于滤波器组的自适应门限窄带干扰抑制方法 | |
| 引用本文： | 夏江华,党建亮,张家树.一种基于滤波器组的自适应门限窄带干扰抑制方法[J].电讯技术,2007,47(2):55-60. |
| 作者姓名： | 夏江华 党建亮 张家树 |
| 作者单位： | 1. 西南交通大学,信号与信息处理实验室,成都,610031;四川航天职业技术学院,成都,610100 2. 河南农业大学,理学院,郑州,450002 3. 西南交通大学,信号与信息处理实验室,成都,610031 |
| 基金项目： | 电子科技大学校科研和教改项目 |
| 摘 要： | 针对直接序列扩频(DSSS)通信中的强窄带干扰,提出了一种基于重叠变换滤波器组的自适应门限窄带干扰抑制技术.该技术根据接收信号经过滤波器组后的统计特性,确定窄带干扰与扩频信号之间的阈值.通过降低高于阈值的子带信号的强度,降低了处理后的信号中的干扰能量,使接收信号的信噪比大大提高. |
| 关 键 词： | 扩频通信 重叠变换 窄带干扰抑制 滤波器组 阈值 |
| 文章编号： | 1001-893X（2007）02-0055-06 |
| 收稿时间： | 2006/8/28 0:00:00 |
| 修稿时间： | 2006-08-282006-12-12 |
An Algorithm for Narrow-band Interference Excision Based on Filter-bank by Adaptive Threshold |
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| XIA Jiang-hu,DANG Jian-liang,ZHANG Jia-shu.An Algorithm for Narrow-band Interference Excision Based on Filter-bank by Adaptive Threshold[J].Telecommunication Engineering,2007,47(2):55-60. | |
| Authors: | XIA Jiang-hu DANG Jian-liang ZHANG Jia-shu |
| Affiliation: | 1. Lab Signal and Information Processing,Southwest Jiaotong University, Chengdu 610031, China; 2. Sichuan Aerospace College of Vocational Technology, Chengdu 610100, China ;3. College of Sciences, Henan Agricultural University, Zhengzhou 450002, China |
| Abstract: | In order to further mitigate the great narrow-band interference (NBI) in direct sequence spread spectrum (DSSS) communication systems, a new algorithm is proposed to suppress NBI based on filter-bank. With this technique,the threshold between the jamming and useful signal is set by estimating the power of the noise in received signal. The BER of the received signal is improved because the jamming energy is reduced by depressing the signal higher than threshold. |
| Keywords: | spread spectrum communication lapped transform narrow - band interference excision filter bank threshold |
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