| 一种中频抗窄带干扰自适应滤波方法 |
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| 引用本文： | 陈锡春,郭晓峰.一种中频抗窄带干扰自适应滤波方法[J].无线电工程,2008,38(6):26-28. |
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| 作者姓名： | 陈锡春 郭晓峰 |
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| 作者单位： | 1. 西安电子科技大学,陕西,西安,710071;中国电子科技集团公司第五十四研究所,河北,石家庄,050081
2. 河北省卫星导航技术与装备工程技术研究中心,河北,石家庄,050081 |
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| 摘 要： | 根据实际的技术需求,针对信号传输带内可能存在领近频率的干扰,采用自适应滤波技术,抑制带内的窄带干扰。该方法是一种数字滤波方法,对中频时域信号进行A/D采样,通过FFT(快速傅里叶变换),变换为相应的离散频域信号,应用抗窄带干扰的自适应滤波算法,消除其频带内的窄带干扰,而同时基本保留有效信号,通过IFFT(反变换)将滤波后的频域信号转换为时域信号,并D/A输出。
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| 关 键 词： | 窄带干扰 自适应滤波 FFT IFFT 频域信号 |
| 文章编号： | 1003-3106(2008)06-0026-03 |
| 修稿时间： | 2008年2月20日 |
An Adaptive Filtering Algorithm for Narrowband Interference Suppression at Intermediate Frequency |
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| CHEN Xi-chun,GUO Xiao-feng.An Adaptive Filtering Algorithm for Narrowband Interference Suppression at Intermediate Frequency[J].Radio Engineering of China,2008,38(6):26-28. |
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| Authors: | CHEN Xi-chun GUO Xiao-feng |
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| Abstract: | According to practical technical requirements,aiming at possibly existing nearby-frequency interference from nearby satellites in signal transmission,the paper provides a method of adaptive filtering to minimize the narrowband interference.The method is a digital filtering algorithm,first it uses the A/D to sample the incoming intermediate frequency continuous signal in time domain,then uses FFT(Fast Fourier Transform)to transform the signal to the corresponding discrete signal in frequency domain,then applies the adaptive filtering algorithm to eliminate the unwanted narrowband interference within the band,while keeping the wanted signal almost untouched.And finally,through IFFT,transforms the processed signal back to the time-domain signal for D/A output. |
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| Keywords: | narrowband interference adaptive filtering FFT IFFT signal in frequency domain |
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