access icon free Tabular construction of balanced codes

© The Institution of Engineering and Technology
Received 16/05/2013, Published

Symmetries in the encoding of balanced sequences are exploited to simplify a tabular approach for constructing balanced codes, and it is shown that with appropriate assignment of source word probabilities, these symmetries ensure the absence of discrete components in the spectrum of the encoded signal. He is further shown that assigning appropriate priorities to codewords during table construction results in superior low-frequency performance, and the use of these techniques is demonstrated in the construction of a balanced QPSK code.

Inspec keywords: codes; probability; quadrature phase shift keying; sequences

Other keywords: balanced codes; superior low-frequency performance; tabular construction; tabular approach; QPSK code; discrete components; source word probabilities; balanced sequences

Subjects: Codes; Modulation and coding methods; Other topics in statistics

References

    1. 1)
      • 4. Franaszek, P.A.: ‘Sequence-state encoding for digital transmission’, Bell Syst. Tech. J., 1968, 47, pp. 143–157.
    2. 2)
      • 6. Xin, Y., Fair, I.J.: ‘A performance metric for codes with a high-order spectral null at zero frequency’, IEEE Trans. Inf. Theory, 2004, 50, (2), pp. 385–394 (doi: 10.1109/TIT.2003.822610).
    3. 3)
      • 7. Jamieson, C., Fair, I.J.: ‘DC-free codes with complex-valued signalling constellations’, IET Commun., 2013, 7, (2), pp. 91–97 (doi: 10.1049/iet-com.2011.0590).
    4. 4)
      • 1. Immink, K.A.S.: ‘Codes for mass data storage systems’ (Shannon Foundation Publishers, Eindhoven, The Netherlands, 2004, 2nd edn).
    5. 5)
      • 3. Jamieson, C., Nikolaidis, I., Fair, I.J.: ‘Improved algorithm for constructing constrained codes with state-independent decoding’, IEEE Commun. Lett., 2011, 15, (3), pp. 272–274 (doi: 10.1109/LCOMM.2011.011811.102279).
    6. 6)
      • 2. Jamieson, C., Fair, I.J.: ‘Construction of constrained codes for state-independent decoding’, IEEE J. Sel. Areas Commun., 2010, 28, (2), pp. 193–199 (doi: 10.1109/JSAC.2010.100208).
    7. 7)
      • 5. Immink, K.A.S., Patrovics, L.: ‘Performance assessment of DC-free multimode codes’, IEEE Trans. Commun., 1997, 45, (3), pp. 293–299 (doi: 10.1109/26.558690).
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