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Effect of merging on two reduced-state detection processes for distorted digital signals

Effect of merging on two reduced-state detection processes for distorted digital signals

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© The Institution of Electrical Engineers
Published

Recently, two reduced-state detection processes for distorted digital signals have been proposed. These can achieve near-maximum-likehood performance without the computational difficulties associated with the Viterbi algorithm. The paper studies the effect of the merging of stored vectors on these processes and explains how and why this can result in a deterioration in performance. Two modifications to avoid merging are given.

Inspec keywords: signal detection; digital communication systems; data communication systems; digital signals

Other keywords: data communication systems; reduced state detection processes; distorted digital signals; digital signal detection; stored vectors merging effects

Subjects: Other data transmission; Signal processing and detection

References

    1. 1)
      • A.P. Clark . (1977) , Advanced datatransmission systems.
    2. 2)
      • G.D. Forney . Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference. IEEE Trans. , 363 - 378
    3. 3)
      • Clark, A.P., Harvey, J.D., Driscoll, J.P.: `Improved detection processes for distorted digital signals', IERE Conference Proceedings 37, 1977, p. 125–136.
    4. 4)
      • Vermeulen, F.L.: `Low complexity decoders for channels with intersymbol interference', 1975, Ph.D. thesis, Stanford University.
    5. 5)
      • Irwin, G.W., Driscoll, J.P.: `The effect of merging on a Viterbi based detection process', 1978/11, Internal report, February 1978.
    6. 6)
      • G.D. Forney . The Viterbi algorithm. Proc. IEEE , 268 - 278
    7. 7)
      • Driscoll, J.P.: `Detection processes based on the Viterbi algorithm', 1979, Ph.D. thesis, Loughborough University of Technology.
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