USB2.0 GNSS软件接收机设计与实现.pdf

上海交通大学
硕士学位论文
GNSS软件接收机设计与实现
姓名:贺喆
申请学位级别:硕士
专业:导航、制导与控制
指导教师:翟传润
20090101
摘要

摘要
随着全球卫星导航系统(GNSS, Global Navigation Satellite System)的迅速发展,新一
代的卫星导航接收机越来越受到研究者和工业界的关注。基于软件无线电思想的 GNSS
软件接收机由于其功能的易重配性及信号处理单元的易实现性等优点,成为近些年国内
外科研机构的研究热点。
本文首先介绍了 GPS 系统和 Galileo 系统的组成及信号结构,并对两种卫星导航信
号进行了分析和对比。本文的主题部分主要介绍了利用射频信号前端 GP2015,将下变
频后的数据高速稳定的通过数据传输系统由 数据总线和上位机进行数据通信。
在实现硬件系统的同时,本文研究了量化位数对卫星导航接收机性能的影响,并且针对
上位机中的跟踪环路设计,分析了在不同动态环境下及不同的多路径干扰时,延迟锁定
环(DLL)的跟踪性能。
本文最后介绍了所设计的硬件系统的机构构成以及对应软件的实现及功能。并且以
初步的实验结果进行了验证,确认了为进一步研究基于本硬件系统的试验平台的可行
性。
关键词:全球卫星导航系统, ,软件接收机,GPS,Galileo

第 I 页
ABSTRACT
USB GNSS SOFTWARE RECEIVER: DESIGN AND
IMPLEMENTATION

ABSTRACT
With the rapid development of the Global Navigation Satellite System, there is a growing
tendency among the researchers who focus on realization of GNSS software receiver. Because
of its unique advantages such as its easy reconfiguration characteristics of function module
and easy to change property of signal processing module, the Software defined radio based
receiver has been regard as a hot research subject.
At first, GPS and Galileo system are introduced, followed with their corresponding signal
structure parison between their properties. The main body discusses the realization of
the whole hardware and software architecture of the system, from the front-end GP2015 to the
data bus which connected with a puter. In the mean time, the
quantization effects on the performances of the receiver are analyzed. Especially, the paper
compared the different tracking performances of the Delay-Lock Loops, under different
dynamic and multipath situations.
In the end, the main contribution of the paper is the hardware and software platform of
the system. Preliminary experimental results are analyzed to verify the validity the future use
of the platform.

Keywords: GNSS, , software receiver, GPS, Galileo
第 II 页
目录

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