【作者】 朱明侠；

【导师】 顾红； 杨新林；

【作者基本信息】 南京理工大学 ， 电子与通信工程， 2009， 硕士

【摘要】 跟踪接收机是微波遥感卫星数据接收系统的一个重要组成部分。在遥感技术日新月异的今天,随着图像分辨率的不断提高,低轨卫星遥感数据速率也在不断提高,从以往十几兆的速率到现在的三百多兆。这就要求微波遥感卫星数据接收系统有较高的G／T值、波束窄、系统信道宽、跟踪精度高,满足接收高速率遥感图象数据的需要。因此对跟踪接收机的要求也越来越高。本文讨论了一种高性能的双频差模单路单脉冲跟踪接收机的设计和实现方法。本接收机采用宽带变频技术完成遥感卫星图象数据的接收处理,采用双频差模单路单脉冲跟踪技术完成对卫星的精确跟踪。本文首先介绍了单脉冲跟踪接收的原理和典型形式,接着论述了单路单脉冲差模跟踪接收机的工程实现方法,给出了接收机各硬件模块的设计和软件功能的设计,完成了接收机的工程设计计算,然后讨论了接收机的一些关键技术问题,最后对接收机的工程应用状况进行了总结。工程实践表明本接收机完全满足接收高速微波遥感卫星数据的需求。更多还原

【Abstract】 Tracking Receiver is an important component of the microwave remote sensing satellite receiving system。With the rapid development of remote sensing technique and the continuous improvement of image resolution, remote sensing data rate of LEO satellites is rising too。It is changing from ten trillion to more than 300 trillion。It requires higher G/T value narrower Beams、wider receiving channel and higher tracking precision of the receiving system to process high-rate remote-sensing image signal。In this paper, we discuss the design and implementation of a high-performance dual-frequency differential-mode single-Monopulse tracking receiver。We use broadband frequency conversion technology to process the image signal of the remote sensing satellites and dual-frequency differential-mode single-monopulse tracking technology to track the satellites accurately。In this paper we firstly introduce the principle of monopulse tracking receiver and its typical forms, then discuss its implementation, thirdly give the design of each hardware module and software, complete the engineering calculation of the receiver, discuss some key technical problems, finally summarize the status of engineering applications。It shows that this receiver fully meets the needs of processing the high-rate signal of the microwave remote sensing satellites.更多还原