Codes for digital line transmission

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Codes for digital line transmission

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© The Institution of Electrical Engineers
Published

Some ternary line codes using alternative codeword sets are described; it is shown that, compared with the currently accepted 4B3T codes, some reduction in redundancy can be achieved without increasing the digital-sum variation.

Inspec keywords: codes; digital communication systems

Other keywords: digital line transmission; ternary line codes; redundancy; digital sum variation

Subjects: Codes

References

    1. 1)
      • R.M. Dorward . (1975) Terminal digital signal processing for high capacity coaxial line transmission, Telecommunication transmission.
    2. 2)
      • R. Catchpole . (1975) Digital line codes and their effect on repeater spacing, Telecommunication transmission.
    3. 3)
      • K.W. Cattermole . (1969) , Principles of pulse code modulation.
    4. 4)
      • Reference 2, pp. 378–380.
    5. 5)
      • M.C. Betts , P. Norman , D.B. Waters . (1975) Factory and field trial experience of the 120 Mb/s digital line system, Telecommunication transmission.
    6. 6)
      • P.A. Franaszek . Sequence state coding for digital transmission. Bell Syst. Tech. J. , 143 - 157
    7. 7)
      • Reference 2, p. 257.
    8. 8)
      • Jessop, A., Waters, D.B.: `4B3T, an efficient code for PCM coaxial line systems', Proceedings 12th International scientific congress on electronics, 1970, .
    9. 9)
      • : `Telecommunication transmission', IEE Conf. Publ., 1975, several papers on digital line transmission.
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