In helicopter satellite communications, the periodic blockage of the received signal and the carrier frequency fluctuation are the most important problems. In this paper, we propose a novel pre-detection time diversity combining scheme with accurate automatic frequency controller (AFC) for helicopter satellite communications. In the proposed scheme, a novel AFC tracks and removes the carrier frequency fluctuation due to Doppler shift exactly, and the in-phase combining of the time diversity signal is performed before the coherent detection. Results of computer simulation show that the proposed scheme improves the BER performance of the previous post-detection combining scheme.


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    Title :

    Pre-detection time diversity combining with accurate AFC for helicopter satellite communications


    Contributors:
    Kojima, T. (author) / Batzorig, C. (author) / Fujino, T. (author)


    Publication date :

    2008


    Size :

    4 Seiten, 7 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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