M-sequence waveform coding with a single long codeword has been considered as the basis for long-range underwater acoustic telemetry for one user. (An m-sequence is a periodic, binary, linear-law maximal-length sequence. If the span of the law is n, the maximal length L-2n=1). For a given law, a single m-sequence transmits a maximum of log2 (L) bits of source information per channel word. To increase the number of bits per word, families of m-sequences and Gold codes are considered and compared to a single m-sequence. A hypothetical idealized multipath channel with added white Gaussian noise is assumed. Coding using families of m-sequences is recommended because it requires a smaller bit-energy-to-noise ratio than other waveform codes to achieve an equivalent codeword error probability.


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    Title :

    Digital waveform codings for ocean acoustic telemetry


    Additional title:

    Digitale Wellenformcodierung für akustische Ozeantelemetrie


    Contributors:
    Kwon, H.M. (author) / Birdsall, T.G. (author)

    Published in:

    Publication date :

    1991


    Size :

    10 Seiten, 10 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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