| DSSS时变窄带干扰抑制算法研究 |
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| 引用本文： | 刘尚峰,王永民,郭建新,许华.DSSS时变窄带干扰抑制算法研究[J].现代防御技术,2012,40(3):99-103. |
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| 作者姓名： | 刘尚峰 王永民 郭建新 许华 |
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| 作者单位： | 1. 空军工程大学电讯工程学院,陕西西安710077;空军雷达学院,湖北武汉430019
2. 空军工程大学电讯工程学院,陕西西安,710077 |
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| 基金项目： | 国防科技重点实验室基金 |
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| 摘 要： | 在传统非线性最小二乘(NLS)算法的基础上,提出一种基于线谱估计的直接序列扩频(DSSS)系统抑制窄带干扰(NBI)的方法。该算法首先通过对基于正弦波叠加模型的NBI进行频率估计,再利用最小二乘准则进行自适应滤波,恢复出干扰信号包络,从而利用干扰对消器将其从观测数据中消除。仿真验证表明,本算法相对于传统的最小均方误差(LMS)算法、自适应频域陷波法,能较好地抑制时变音频NBI模型的干扰,且信息量损失较小。
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| 关 键 词： | 直接序列扩频 窄带干扰抑制 MUSIC算法 最小二次均方准则 |
Research on Time Variant NBI Suppression Algorithm for DSSS Communications |
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| LIU Shang-Feng
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WANG Yong-min
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GUO Jian-xin
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XU Hua.Research on Time Variant NBI Suppression Algorithm for DSSS Communications[J].Modern Defence Technology,2012,40(3):99-103. |
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| Authors: | LIU Shang-Feng WANG Yong-min GUO Jian-xin XU Hua |
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| Institution: | 1(1.AFEU,Telecommunication Engineering Institute,Shaanxi Xi′an 710077 China; 2.Air Force Rader Academy,Hubei Wuhan 430019,China) |
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| Abstract: | A narrowband interference suppression algorithm based on parametric line spectral estimation in direct sequence spread spectrum(DSSS) communication systems is proposed by exploiting nonlinear least-square used in traditional method.With this algorithm,the spectrum is estimated based on narrow band interference(NBI) of stacking sine wave model,and then nonlinear least square(NLS) adaptive filter with minimum least square criteria is used to resume envelop of interference signal and eliminate it from observation signals with Interference canceller.The simulation results show that the proposed algorithm has better performance on the suppression of NBI than conventional algorithms. |
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| Keywords: | direct sequence spread spectrum narrowband interference suppression multiple signal classification(MUSIC) algorithm minimum mean-square criteria |
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