| 高动态GPS信号C/A码捕获方案及实现 |
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| 引用本文： | 罗兴宇,张其善,常青.高动态GPS信号C/A码捕获方案及实现[J].北京航空航天大学学报,2002,28(3):358-361. |
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| 作者姓名： | 罗兴宇 张其善 常青 |
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| 作者单位： | 北京航空航天大学,电子工程系 |
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| 基金项目： | 国家自然科学基金;60027001; |
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| 摘 要： | 为检测高动态GPS(Global Positioning System)信号,需要设计码环及载波环捕获与跟踪数字系统.尽量缩短盲捕时间,快速捕获到信号,是研制高动态GPS接收机技术的关键,而GPS信号C/A码的快速捕获是码跟踪和载波捕获与跟踪的基础.主要讨论了在高动态GPS信号C/A码捕获中,并行搜索法和串行搜索法的原理与实现,并结合GEC公司的十二通道相关器GP2021,给出基于DSP(数字信号处理器)技术用串行搜索法捕获高动态GPS信号C/A码的算法实现.
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| 关 键 词： | 伪随机码 捕获 虚警 |
| 文章编号： | 1001-5965(2002)03-0358-04 |
| 收稿时间： | 2001-03-19 |
| 修稿时间： | 2001年3月19日 |
Control Strategy and Implementation for Acquiring C/A Code of High Dynamic GPS Signals |
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| LUO Xing-yu,ZHANG Qi,CHANG Qing.Control Strategy and Implementation for Acquiring C/A Code of High Dynamic GPS Signals[J].Journal of Beijing University of Aeronautics and Astronautics,2002,28(3):358-361. |
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| Authors: | LUO Xing-yu ZHANG Qi CHANG Qing |
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| Institution: | Beijing University of Aeronautics and Astronautics, Dept. of Electronic Engineering |
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| Abstract: | It is necessary to design acquisition and tracking system for code loop and carrier loop in order to detect high dynamic GPS signals. Acquiring signal quickly and shortening acquisition time in the cold case are the key technologies of high dynamic GPS receiver. Moreover, fast acquisition of C/A code is the base of code tracking and carrier acquisition and tracking. This paper describes elements and implementation of parallel search precept and sequential search precept to acquire C/A code of high dynamic GPS signal. And combined with a 12 channel correlator named GP2021 produced by GEC Co., the arithmetic implementation to acquire C/A code of high dynamic GPS signal used sequential search precept based on DSP technology is also given. |
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| Keywords: | pseudorandom codes trapping false alarms |
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