| 基于IIR滤波器的窄带干扰抑制技术仿真与实现 |
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| 引用本文： | 张平华,朱运航.基于IIR滤波器的窄带干扰抑制技术仿真与实现[J].中国集成电路,2012(4):51-56. |
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| 作者姓名： | 张平华 朱运航 |
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| 作者单位： | 湖南信息职业技术学院,湖南长沙,410200 |
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| 基金项目： | 湖南省教育厅资助科研项目：通信系统电磁干扰及其控制方法研究（09C1259） |
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| 摘 要： | 研究了直扩通信中二阶自适应格型IIR陷波滤波器在抗窄带干扰中的应用,推导了系统信噪比改善因子和误比特率的闭合表达式,分析了算法的性能,并进行了MATLAB仿真。基础上,设计了FPGA可实现的自适应解扩重扩滤波器,该滤波器实现简单,硬件测试表明,滤波器达到了预期的性能指标,有效可抗窄带干扰在大约21dB。
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| 关 键 词： | 直扩通信 窄带干扰 FPGA |
Simulation and Realization of Narrow-band Interference Suppression Technology Using IIR Filter |
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| ZHANG Ping-hua,ZHU Yun-hang.Simulation and Realization of Narrow-band Interference Suppression Technology Using IIR Filter[J].China Integrated Circuit,2012(4):51-56. |
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| Authors: | ZHANG Ping-hua ZHU Yun-hang |
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| Affiliation: | (Dept.of Information Engineering,Hunan College of Information,Changsha,410200,China) |
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| Abstract: | An application of a second-order adaptive lattice IIR notch filter for rejection of NBI in direct sequence spread spectrum system（DSSS） is studied.Closed-form analytical expressions for signal-to-noise ratio（SNR） improvement factor and bit error ratio（BER） of the system are derived.The performances of the algorithm have been researched and simulated in MATLAB.The adaptive filter is designed and implemented on FPGA,which is simple to realize.It is shown by the test on hardware circuit that the filter had a capacity of about 21dB for NBI rejection which satisfies the requirement. |
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| Keywords: | direct sequence spread spectrum system（DSSS） narrow-band interference FPGA |
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