| 基于假设检验的FRFT域LFM干扰抑制 |
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| 引用本文： | 冯冀宁,刁哲军,杨晓波,吴嗣亮.基于假设检验的FRFT域LFM干扰抑制[J].兵工学报,2012,33(1):7-12. |
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| 作者姓名： | 冯冀宁 刁哲军 杨晓波 吴嗣亮 |
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| 作者单位： | 河北师范大学电子工程系,河北石家庄050031;北京理工大学电子工程系,北京100081;河北师范大学电子工程系,河北石家庄,050031;石家庄职业技术学院电子工程系,河北石家庄,050081;北京理工大学电子工程系,北京,100081 |
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| 基金项目： | 国家自然科学基金，河北省自然科学基金，河北省科技支撑项目 |
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| 摘 要： | 针对FRFT域LFM干扰抑制门限较难准确设置的问题，分析了固定门限法与自适应门限法利用FRFT域统计量确定门限存在的缺陷。在直接序列扩频信号与信道噪声的和近似服从高斯分布的条件下，利用LFM干扰和高斯白噪声在FRFT域谱的性质，提出直接序列扩频接收机基于假设检验的LFM干扰抑制新算法。计算机仿真结果验证了算法的有效性。
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| 关 键 词： | 通信技术 直接序列扩频 FRFT域 线性调频 干扰抑制 |
LFM Interference Suppression in FRFT Domain Based on Hypothesis Testing |
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| FENG Ji-ning
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DIAO Zhe-jun
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YANG Xiao-bo
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WU Si-liang.LFM Interference Suppression in FRFT Domain Based on Hypothesis Testing[J].Acta Armamentarii,2012,33(1):7-12. |
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| Authors: | FENG Ji-ning DIAO Zhe-jun YANG Xiao-bo WU Si-liang |
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| Affiliation: | (1.The Electronic Engineering Department, Hebei Normal University, Shijiazhuang 050031, Hebei, China;2.Shijiazhuang Professional Technology Institute, Shijiazhuang 050081, Hebei, China;3.Department of Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China) |
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| Abstract: | Refering to the problem that it is difficult to set the exact threshold of LFM interference suppression in FRFT domain,the defect of fixed threshold algorithm and adaptive threshold algorithm is analyzed.Under the condition that only the direct sequence spread spectrum signal and additive Gaussian noise are present at the receiver,the amplitude of received signal after FRFT is assumed to be Rayleigh distributed.Based on the distribution characteristics,a novel LFM interference suppression algorithm based on hypothesis testing is proposed.The simulation results show the validity of the algorithm. |
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| Keywords: | communication technology direct sequence spread spectrum FRFT domain linear frequency modulate interference suppression |
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