| 基于重叠保留法及FFT的伪码快速捕获技术研究 |
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| 引用本文： | 陆承颖.基于重叠保留法及FFT的伪码快速捕获技术研究[J].现代防御技术,2007,35(4):95-99. |
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| 作者姓名： | 陆承颖 |
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| 作者单位： | 中国航天科工集团公司,二院25所,北京,100854 |
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| 摘 要： | PN码的快速捕获是设计直接序列扩频接收机的关键技术之一。对于无限长的输入序列,采用了基于分段相关的快速捕获算法。分段相关采用重叠保留法,用FFT实现每块的相关运算。在Matlab环境下验证了本算法可以在低信噪比及高动态环境下实现PN码的快速捕获。
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| 关 键 词： | 伪码捕获 分段相关 重叠保留法 快速傅里叶变换 |
| 文章编号： | 1009-086X(2007)-04-0095-05 |
| 修稿时间： | 2006年11月30 |
Study on Technique of Fast Acquisition Pseudo Noise Code Based on Overlap-Save Method and FFT |
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| LU Cheng-ying.Study on Technique of Fast Acquisition Pseudo Noise Code Based on Overlap-Save Method and FFT[J].Modern Defence Technology,2007,35(4):95-99. |
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| Authors: | LU Cheng-ying |
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| Abstract: | A key technology in the design of direct-sequence spread-spectrum(DSSS) receivers is the fast acquisition pseudo-noise(PN) code.For the input signal is indefinite duration,a fast acquisition algorithm based on the block correlation is proposed in this paper.The block correlation procedure used in this paper is overlap-save method.The correlation of each block was implemented using the FFT.The Simulation result shows the algorithm is able to capture PN code fast in the presence of high dynamic under the conditions of low SNR. |
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| Keywords: | PN code acquisition block correlation overlap-save methods FFT |
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