建模与仿真GPS信号产生和数字信号重建的应用软件

中文字数:5082,中文页数:8  英文字数:2965 页数:11

作者简介

Alison Brown是公司总裁兼首席执行官，她获得过加州大学洛杉矶分校在力学，航空航天和核工程的博士学位，麻省理工学院航空和航天的理学硕士学位，剑桥大学的文学硕士学位。她于1986年成立NAVSYS.现在她是GPS - Ⅲ（服务于美国空军和全球定位系统）编辑顾问委员会的独立审评组和科学咨询委员会的一员。

Keith Taylor是NAVSYS公司的项目经理。他负责开发基于MATLAB的GPS信号模拟工具，应对用户选择的信号环境和干扰的情况。他持有来自佛罗里达大学的电机工程学硕士学位和路易斯维尔大学的电机工程学士学位。

Neil Gerein是NAVSYS公司的项目经理。他负责快速采集基于GPS接收机系统的FFT（COGNAC） ，并开发Xilinx FPGA的固件和改变CPLD（复杂可编程逻辑器件备）
他目前正在拥有电机工程学士学位萨斯喀彻温省大学，完成他的硕士电气工程专业。

摘要

GPS卫星模拟器试验设施是用来校验全球定位系统接收器和增强系统的软件和硬件的。一般情况下，它们包括卫星信号模拟器，差分放大模拟器和仿真器的接口。所有的测试运行实时需要大量的硬件和人力资产。起初，动态情况下的模拟必须设计并存储在模拟器控制计算机。这种情况下指定好所有有关的因素，包括GPS接收器的轨道，人造卫星的位置，信号功率和波形，环境因素包括传播错误和干扰的影响。一般情况下，在实际测试情况前，要完成大多设备安装和校准。此外，卫星模拟器及控制设备的费用昂贵，通常需要100万美元。

NAVSYS已经开发出一种MATLAB的产品，用软件仿真的复杂环境，来完成全球定位系统建设。这提供了一个高精度模型的GPS信号环境，也可以对收到的GPS信号加入干扰信号源，天线和接收机特性。软件仿真的结果是从一个GPS接收机，在这种环境下，代表数字采样的GPS信号的数字式文件。

Modeling and Simulation of GPS Using Software
Signal Generation and Digital signal Reconstruction
Alison Brown, Neil Gerein, and Keith Taylor, NAVSYS Corporation

BIOGRAPHY

Alison Brown is the President and CEO of NAVSYS Corp. She has a PhD in Mechanics, Aerospace, and Nuclear Engineering from UCLA, an MS in Aeronautics and Astronautics from MIT, and an MA in Engineering from Cambridge Univ. In 1986 she founded NAVSYS.Currently she is a member of the GPS-III Independent Review Team and Science Advisory Board for the USAF and serves on the GPS World editorial advisory board.

Keith Taylor is a Project Manager for NAVSYS Corporation. He is responsible for developing MATLAB based GPS signal simulation tools for user selectable signal environments and jamming scenarios. He holds an MSEE from University of Florida and a BSEE from the University of Louisville.

Neil Gerein is a Project Manager for NAVSYS Corporation. He is responsible for a rapid acquisition FFT based GPS receiver system (COGNAC) and has developed firmware for Xilinx FPGAs and Altera CPLDs.He is currently completing his M.Sc. in Electrical Engineering and holds a BSEE in Electrical Engineering from the University of Saskatchewan.

ABSTRACT

GPS satellite simulator test facilities are used to checkout the software and hardware of GPS receivers and their augmentation systems. In general, they include satellite signal simulators, differential augmentation simulators and interface emulators. All testing is run in real time and requires considerable hardware and human assets. Initially, the dynamic scenario to be simulated must be designed and stored in the simulator control computer. This scenario specifies all relevant factors including the trajectory of the GPS receiver(s), the satellite constellation, the signal power and waveforms, environmental factors including propagation errors, and jamming effects. In general, there is considerable equipment setup and calibrations that must be performed prior to actually exercising the scenario. In addition, the satellite simulator and control equipment are expensive resources typically costing on the order of one million dollars.

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