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Digital waveform codings for ocean acoustic telemetry

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2 Author(s)
Kwon, H.M. ; Dept. of Electr. Eng. & Comput. Sci., Wisconsin Univ., Milwaukee, WI, USA ; Birdsall, T.G.

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

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:16 ,  Issue: 1 )