| 十二通道GPS信号发生器方案研制 |
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| 引用本文： | 陆娟,常青,张其善,张军.十二通道GPS信号发生器方案研制[J].北京航空航天大学学报,2003,29(4):331-334. |
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| 作者姓名： | 陆娟 常青 张其善 张军 |
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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： | 国家自然科学基金资助项目 ( 60 0 2 70 0 1) |
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| 摘 要： | 为了测试GPS(全球定位系统)接收机的性能,需要应用GPS信号模拟器来模拟各种条件下真实的GPS信号.分析了单通道与多通道GPS信号的时域及频域特性,建立了十二通道GPS信号模拟器的数学模型.该模型应用了软件无线电的设计思想和内插理论,可以直接产生35.42MHz的中频信号,以降低硬件设计的复杂度.文中用SystemView软件的仿真结果验证了系统设计的可行性,并提出了该系统的硬件实现.
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| 关 键 词： | 信号发生器 内插 数字调制 全球定位系统 软件无线电 |
| 文章编号： | 1001-5965(2003)04-0331-04 |
| 收稿时间： | 2002-01-14 |
| 修稿时间： | 2002年1月14日 |
Design of a Twelve-Channel Digtal GPS Simulation System |
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| Lu Juan,Chang Qing,Zhang Qishan,Zhang Jun.Design of a Twelve-Channel Digtal GPS Simulation System[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(4):331-334. |
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| Authors: | Lu Juan Chang Qing Zhang Qishan Zhang Jun |
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| Institution: | Dept. of Electronic Engineering, Beijing University of Aeronautics and Astronautics |
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| Abstract: | For the purpose of testing the performance of GPS receivers, a GPS signal simulator is needed that can emulate the real GPS signals under all kinds of conditions. Single channel and multi-channel GPS signals' characters in time domain and frequency domain are analyed. A mathematic model of the twelve-channel GPS simulator is proposed. In order to reduce the difficulties of the hardware design, this model is designed to provide a 35.42MHz IF signal directly by applying the idea of "software radio" and the theory of interpolation. Simulation results with SystemView software have demonstrated the feasibility of the system scheme. In addition, a practical hardware design of this system is described. |
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| Keywords: | signal generators interpolation digital modulation global position system software radio |
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