| 基于时域滤波互谱密度的扩频信号测向 |
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| 引用本文： | 李钢,贾峰. 基于时域滤波互谱密度的扩频信号测向[J]. 无线电工程, 2010, 40(8): 52-55 |
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| 作者姓名： | 李钢 贾峰 |
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| 作者单位： | 1. 中国电子科技集团公司第五十四研究所,河北,石家庄,050081
2. 空军驻石家庄地区军事代表室,河北,石家庄,050081 |
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| 摘 要： | 给出时域滤波互谱密度法的实现框图,根据其数学模型分析对其噪声的抑制作用。针对扩频信号,根据互相关函数的峰值特性,设定适当的门限,检测扩频信号。根据互相关函数加窗后的傅里叶变换得到时域滤波互谱密度,利用其在信号带宽内的相位斜率的线性特征估计信号到达方向。计算机仿真表明,基于时域滤波互谱密度法检测扩频信号并实现测向的方法有效可行。
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| 关 键 词： | 扩频信号 互相关函数 时域滤波互谱密度 测向 |
Direction Finding of Spread Spectrum Signal Based on Time Domain Filtered Cross-spectral Density |
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| LI Gang,JIA Feng. Direction Finding of Spread Spectrum Signal Based on Time Domain Filtered Cross-spectral Density[J]. Radio Engineering of China, 2010, 40(8): 52-55 |
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| Authors: | LI Gang JIA Feng |
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| Affiliation: | 1.The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China;2.Air Force Military Representative Office,Shijiazhuang Hebei 050081,China) |
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| Abstract: | Realization structure diagram of time domain filtered cross-spectral density is provided.Restraining to noise is analyzed according to math model.Taking spread spectrum signal for example,it is detected by peak character of cross-correlation and proper gate.Time domain cross-spectral density is calculated by the FFT transforming of windowing correlation function of two signals.The direction of signal is estimated by linear phase slope of time domain cross-spectral density in the signal bandwidth.Computer simulation results show that the detection and direction finding method is effective. |
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| Keywords: | spread spectrum signal Cross-correlation function time domain Cross-spectral Density direction finding |
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