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    An Advanced Digital Ranging and Telecontrol Apparatus

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    Author
    Hua, Zhong-Han
    Affiliation
    Beijing University of Aeronautics and Astronautics
    Issue Date
    1994-10
    
    Metadata
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    Rights
    Copyright © International Foundation for Telemetering
    Collection Information
    Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
    Publisher
    International Foundation for Telemetering
    Journal
    International Telemetering Conference Proceedings
    Abstract
    An earth station apparatus and its technical specificities and components are described in this article. Which is used for locating and telecontrol of flying objects. The pseudo-random spread spectrum system compatible with GPS is used in measuring the distance and velocity of moving-targets. The ranging and range-rate measuring signals and telecontrol signal are included in up link. The CDMADS, GLOD code are used for ranging and range-rate measuring. The GLOD code rate varies from 1 Kbps to 2.048 Mbps in step 1 bit. The subcarrier modulation systems of telecontrol are PSK, FSK, MFSK and High alphabet modulation. The frequency of subcarrier varies from 1 KHz to 1 MHZ in step 1 Hz. The rate of instruction code varies from 50 bps to 38.4Kbps in step 1 bit. The modulation indexes varies from 0.7 to 2 in 16 steps. The polarization diversity technique of digital symmetical common mode and differential mode loops are applied in down link receiver. It is used for demodulation of back signal, ranging and range-rate measuring signal and A, E error signal used by track system. The digital technique and modularization bus technique are used throughout the apparetus. All modules in apparatus and their principle are discussed in thes article.
    Sponsors
    International Foundation for Telemetering
    ISSN
    0884-5123
    0074-9079
    Additional Links
    http://www.telemetry.org/
    Collections
    International Telemetering Conference Proceedings, Volume 30 (1994)

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