Research On Module Of Satelliate Identification

With the development of satelliate technology and market, in nowadays, trends of satelliate appear as follow:1. In order to get new frequency source, high-speed transport velocity and small portable aperture antenna, ku-band has become far-reaching application. As we know, under the equal aperture, antenna gain is in direct ratio to signal wavelengh. A small antenna (0.5-1.2m) can perform communication of several line real-time audio and video in KU band. A series of ka-band propagation experiments supported by ETS-II (Japan) ,Olympus (Europe), ITALSAT (Italy). ACTS (US) . Techniques such as rain fade mitigation, spot beam and shape beam have been developed . the commercial apply of ka-band satelliate will be soon.2. Transponder rent depressed in evidence. The rent of a ku-band transponder is $ 1.5million-$2million per year.3. Techniques such as spot beam, shape beam and transact in satelliate have been used comprehensively.Thus, the application range of satelliate has extend to commercial, household and mobile communicate.As a module of mobile satelliate communication equipment, it can provide a voltage inverse ratio to crab-angle of antenna bearing, and identify the signal source locked by antenna servo.Six chapters were divided in this paper. The present condition of the immobile satelliate application and the peculiarity of mobile satelliate communicate were reviewed in chapter 1. The paper explain the significance of the theme. The identification feasibility of several characteristics such as magnetic azimuth, beacom, frequency spectrum and data stream were evaluated in chapter2. we also choose a satelliate as identification sample, analyse it's spectrum characteristics that can be easy identified. We bring forward the frame of module and bottom-layer program in chapters. By the means of Artificial Neural Networks (Backpropagation), we constitute the identify algorithm in chapter4. Chapters provides the software of algorithm and the result of operation.At last chapter, we introduce the commercial use and possible improvement of the module.The module and preliminary-identify program has been used in the equipment of Beijing Boolean Technologies Co. Because limited by the speed of singlechip and cost, advanced identify software is simulate in PC* With the precision demand of two-way equipment, advance identify model should be used extensively.