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Partial correction of transmission errors in d.p.c.m. without recourse to error correction coding

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Abstract

A method for partially correcting transmission errors in a 1st-order d.p.c.m. system, without recourse to channel coding, is described. A simple detection algorithm based on the statistical properties of a sequence of differences between adjacent samples of a modified decoded sequence is used to identify the erroneous samples. Three different correcting algorithms are described. Substantial improvements in the decoded waveform are achieved, and, for a Markov input process, an error rate of 0.04% in the first and second most significant digits, an improvement in s.n.r. of 7dB is achieved.

References

    1. 1)
      • R. Steele , D.J. Goodman . Detection selective smoothing of transmission errors in linear PCM. Bell Syst. Tech. J. , 399 - 409
    2. 2)
      • Wong, W.C., Steele, R., Goodman, D.J.: `Partial detection correction of transmission errors in linear pcm', Digital Processing of Signals in Communications Conference, September 1977, Loughborough University of Technology, to be published.
    3. 3)
      • E. Kreyszig . (1979) , Advanced engineering mathematics.

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content/journals/10.1049/el_19770256
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