| 基于多伪码周期的直扩快速捕获新方法 |
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| 引用本文： | 王鹏宇,吕善伟,董胜波.基于多伪码周期的直扩快速捕获新方法[J].宇航计测技术,2008,28(1):4-8. |
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| 作者姓名： | 王鹏宇 吕善伟 董胜波 |
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| 作者单位： | 1. 北京航空航天大学电子信息工程学院,北京,100083
2. 北京遥感设备研究所,北京,100039 |
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| 摘 要： | 一般高动态扩频接收系统中用于快速捕获的FFT运算主要是在频域或者码域中的一个域进行，在另一个域中步进搜索，而步进造成捕获时间成倍增加。通过在一个数据周期内嵌入一定数量的伪码周期，提出一种能同时在频域和码域中应用FFT进行并行捕获的新方法。仿真表明该方法捕获时间短、精度高。
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| 关 键 词： | 扩频通信 FFT +捕获方法 |
| 文章编号： | 1000-7202(2008)01-0004-05 |
| 修稿时间： | 2007年5月24日 |
A New Fast PN Code-acquisition Using Multi-pseudo-code Cycles |
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| WANG Peng-yu,LV Shan-wei,DONG Sheng-bo.A New Fast PN Code-acquisition Using Multi-pseudo-code Cycles[J].Journal of Astronautic Metrology and Measurement,2008,28(1):4-8. |
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| Authors: | WANG Peng-yu LV Shan-wei DONG Sheng-bo |
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| Institution: | WANG Peng-yu, LV Shan-wei, DONG Sheng-bo ( 1. BeiHang University staff room 205, Beijing 100083 ; 2. Beijing Institute of Remote Sensing Equipment Abstract, Beijing 100039) |
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| Abstract: | In order to capture PN quickly, FFT is finished either in the frequency field or code field, and searching the single unit in the code field or the frequency field per time is finished in the other field. This is normally used in the high dynamic wide frequency receiving system. Serial searching requires a long capture time. Comparatively, having inserted a certain number of pseudo-code cycles in a data cycle,can carry on the parallel capture both in frequency field and code field by FFT simultaneously. This is quite a we new method and well illustrated in the paper. The simulation proves the capture finished by the new method is not only fugal in time cost but also high in precision. |
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