| Space communication reconnaissance is to gather political?economic?military and diplomatic intelligence in target countries or regions by reception of communication signals through a satellite platform.The main task for the platform is to analyze certain signal features such as working frequency,amplitude,modulation,bandwidth and characteristics of the signals,and the content,position,start and end time,number?frequency of appearance and the sources distribution of the signals.The receiver designed in this study is a critical part for the space communication reconnaissance system.With the rapid development of the advanced electronic technology,a higher capacity of interference suppression,respond speed and process capacity is required.Software engineering,digital design and high integration are three major trends in the development of contemporary space receiver.Based on the specific space project this study attached to,we carried out a wide range of study on the design of receiver circuit and the selection of electronic components.A subsequent improvement was made on the receiver design based on multi-mode communication signal recognition technology.Through circuit simulation on the design and a series of environment test on the prototype,a high performance,high reliability satellite receiver was achieved,with the capability of modulate and process various signals and a stable performance in a wide range of temperature(-35?~+70?).In this thesis,the development of satellite receiver and current application of this technology was briefly reviewed at first.Then we mainly focused on a detailed introduction on the design and circuit simulation result of the receiver based on communication signal recognition technology,and we introduced the process and results of the assembly and test.In the end,we concluded that the receiver was proved to be highly practical and reliable through the analysis and comparison of the test data of the receiver. |
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