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GPS-based high stability frequency synthesizer Research

Author: HuangJianLi
Tutor: CaiJingYe
School: University of Electronic Science and Technology
Course: Signal and Information Processing
Keywords: Frequency Stability Frequency standard Global Positioning System Phase-locked loop
CLC: TN967.1
Type: Master's thesis
Year: 2002
Downloads: 207
Quote: 2
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Abstract


Due to the increasing development of communication and makes extensive use of a variety of communications transmitters continue to face the problem of the electromagnetic spectrum is increasingly crowded , strict rules in order to avoid mutual interference between the transmitter frequency stability of the emission source , while the frequency highly stable source of growing demand . Now, with the development of science and technology , high stability frequency source uses an increasingly wide range of high-precision frequency source used as a standard signal ( such as a time basis, communications carrier ) frequency source stability requirements are also increasing . Frequency stability has become a key technology of the modern electronic systems and equipment , or their key technical indicators . Frequency source with the rapid development of frequency standards necessarily promote the development of the frequency and time measurement and frequency stability theory and measurement techniques . In the traditional high stability frequency standard method only outside , people continue to explore new ways to realize . Recently, the Global Positioning System was first used in the military field are increasingly improved global positioning system used in civilian areas and the rapid expansion has created a huge socio-economic value . After ten years of applied research and practice , the Global Positioning System in the sea , land and air many ways to obtain a wide range of applications, a very good effect , and these include high stability frequency source application . Based on track to achieve high stability frequency in the traditional method , this paper investigates the use of GPS controlled crystal frequency standard system construction method . The objective is to identify a able to get a good long-term and short-term frequency stability and can achieve better cost-effective system . And for the GPS receiver , the phase-locked loop circuit , sampling circuit , interface circuit hardware circuit design, object-oriented language VC6.0 prepared control software interface and system software development tools . Build the actual work platform , the feasibility of the system and the key technical indicators . The practice shows that the use of the Global Positioning System on the ordinary crystal frequency correction can improve the accuracy of the crystal indicators on the basis of lower cost . Access to a wide range of applications in civilian areas .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio navigation > Navigation systems of the various institutional > Satellite navigation system
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