| 一种基于循环谱的直扩信号参数估计方法 |
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| 引用本文： | 曹志明,张继文.一种基于循环谱的直扩信号参数估计方法[J].现代电子技术,2010,33(7):85-88. |
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| 作者姓名： | 曹志明 张继文 |
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| 作者单位： | 国家知识产权局专利审查协作中心,北京,100190 |
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| 摘 要： | 分析BPSK调制的直扩信号循环谱密度函数特征,提出一种直扩信号参数估计方法。从循环谱物理意义入手,计算谱密度,通过时域预处理,可以减少DFT要求的数据量,提高运算效率,使循环谱实时处理成为可能,同时可以准确分辨出循环频率方向和谱频率方向的谱峰;在非零循环频率上搜索特征谱线,可以在较低信噪比环境下完成直扩信号载波频率和PN码速率的估计,并通过仿真确定了该方法的信噪比容限。
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| 关 键 词： | 循环平稳 循环频率 参数估计 直扩信号 |
Method of Direct Sequence Spread Spectrum Signal Parameter Estimation Based on Cyclostationary Spectral Density |
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| CAO Zhi-ming,ZHANG Ji-wen.Method of Direct Sequence Spread Spectrum Signal Parameter Estimation Based on Cyclostationary Spectral Density[J].Modern Electronic Technique,2010,33(7):85-88. |
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| Authors: | CAO Zhi-ming ZHANG Ji-wen |
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| Affiliation: | CAO Zhi-ming,ZHANG Ji-wen(Patent Examination Cooperation Center of SIPO,Beijing 100190,China) |
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| Abstract: | The function characteristics of the spectral correlation density of the direct sequence spread spctrum signal modulated by BPSK are analysed,and a new method for parameter estimation of the direct sequence spread spctrum signal is proposed.The cyclic spectral density is calculated proceeding with the cyclic spectrum physical meaning,and the burden of calculation is lessened greatly by the time domain preprocessing.It reduces the quantity of data required by DFT,improves computational efficiency,and improves... |
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| Keywords: | cyclostationariness cyclic frequency parameter estimation direct sequence spread spectrum signal |
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