| 可用于DSSS系统时变干扰抑制的IIR滤波器设计 |
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| 引用本文： | 张春海,朱江,王世练,张尔扬.可用于DSSS系统时变干扰抑制的IIR滤波器设计[J].信号处理,2007,23(4):495-499. |
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| 作者姓名： | 张春海 朱江 王世练 张尔扬 |
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| 作者单位： | 国防科技大学电子科学与工程学院,长沙,410073 |
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| 摘 要： | 在理想的干扰瞬时频率估计条件下,推导Kwan-Martin结构IIR干扰抑制滤波器相关输出信干噪比改善因子的闭合表达式。与五系数时变FIR滤波器干扰抑制性能比较表明,IIR滤波器对DSSS信号的失真远小于FIR滤波器,信干噪比改善因子与干扰瞬时频率及系统扩展比无关,干扰抑制性能优于时变FIR滤波结构。
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| 关 键 词： | 直接序列扩频 抗干扰 IIR滤波器 瞬时频率估计 |
| 修稿时间： | 2005年9月19日 |
The Design of IIR Filters for Time-Varying Interference Suppression in DSSS Communications Systems |
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| ZHANG Chun-hai,ZHU Jiang,WANG Shi-lian,ZHANG Er-yang.The Design of IIR Filters for Time-Varying Interference Suppression in DSSS Communications Systems[J].Signal Processing,2007,23(4):495-499. |
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| Authors: | ZHANG Chun-hai ZHU Jiang WANG Shi-lian ZHANG Er-yang |
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| Abstract: | On condition that the accurate estimation of instantaneous frequency of the interference,closed-form expression of the improvement of Signal to Interference and Noise Ratios (SINR) of Kwan-Martin IIR filter is derived.It is proved comparing with the five-coefflcient FIR that the IIR filter introduced less distortion to DSSS signal,and that the improvement of SINR of IIR filter is inde-pendent with the instantaneous frequency of interference and spreading gain.A better interference suppression performance can be achieved with IIR filter. |
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| Keywords: | Direct Sequence Spread Spectrum Interference Suppression IIR Filter Instantaneous Frequency Estimation |
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