Composed Short Walsh’s Sequences

  • Dr. Ahmad Hamza Al Cheikha AHLIA University
Keywords: Walsh sequences, Additive group, Rademacher sequences, Autocorrelation function

Abstract

Walsh sequences (which formed an additive group and generated by Rademacher sequences) are used widely in the forward links of communication channels to mix the information on connecting to and at the backward links of these channels to sift through this information is transmitted to reach the receivers this information in correct form, especially in the pilot channels, the Sync channels, and the Traffics channel.

References

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Byrnes, J.S.; SWICK. “Instant Walsh Functions” , SIAM Rever.,VOL. 12 1970, pp.131.

Lee, D.S.; Miller, L.E. “CDMA Engineering Hand Book. Artech House, Boston, London, 1998. Pp.48 - 70

Mac Williams, F.J.; Sloane N.G.A.”The Theory of Error-Correcting Codes”, North-Holland, Amsterdam, 1978

Yang, S.C. “CDMA RF System Engineering”, Artech House, Boston and London, 1998. pp. 80 - 110

Al Cheikha, A. “Generation of Sets of Sequences Isomorphic to Walsh Sequences”, Qatar Uni. Sci. J. VOL 25, 2005.Pp. 16-30

Yang K, S. C.; Kim, Y.; Kumar, P.V. “Quasi-orthogonal Sequences for Codes- Division Multiple Access Systems”, IEEE Trans. On Information Theory, VOL 46, 2000.

pp. 982-993

Al Cheikha A. H., Ruchin J.,“ Generation of Orthogonal Sequences by Walsh Sequences” International Journal of Soft Computing and Engineering Vol.–4, Issue-1, March 2014, pp 182-184.
Published
2014-07-31
Section
Original Article