On a method to improve correlation properties of orthogonal polyphase spreading sequences

• Autorzy: Wysocki B. J. , Wysocki T. A.
• Języki publikacji: EN

Abstrakty

EN

In this paper, we propose a simple but efficient method for improving correlation properties of polyphase spreading sequences for asynchronous direct sequence code division multiple access (DS CDMA) applications. The proposed method can be used to reduce the mean square value of aperiodic crosscorrelation or the mean square value of aperiodic autocorrelation, the maximum value of aperiodic crosscorrelation functions, merit factor or other properties of the sequence set. The important feature of the method is that while it modifies correlation properties of the sequence set, it preserves sequence orthogonality for perfect synchronization, if this is the property of the original sequence set.

Słowa kluczowe

EN

spread spectrum communications; orthogonal sequences; wireless communication; wireless LAN; correlation

• Wydawca: Instytut Łączności - Państwowy Instytut Badawczy
• Czasopismo: Journal of Telecommunications and Information Technology
• Rocznik: 2003
• Tom: nr 2
• Strony: 99--105
• Opis fizyczny: Bibliogr. 16 poz., tab., rys.

Twórcy

autor

Wysocki B. J.

• University of Wollongong, Wollongong, NSW 2522, Australia

autor

Wysocki T. A.

• School of Electrical, Computer and Telecommunications Engineering University of Wollongong Wollongong, NSW 2522, Australia

Bibliografia

• [1] R. Steele, “Introduction to digital cellular radio”, in Mobile Radio Communications, R. Steele and L. Hanzo, Eds., 2nd ed. New York: IEEE Press, 1999.
• [2] H. F. Harmuth, Transmission of Information by Orthogonal Functions. Berlin: Springer-Verlag, 1970.
• [3] B. J. Wysocki and T. A. Wysocki, “Orthogonal binary sequences with wide range of correlation properties”, in Proc. 6th Int. Symp. Commun. Theory Appl., ISCTA’01, Ambleside, Lake District, U.K., 2001, pp. 483–485.
• [4] M. B. Pursley, “Performance evaluation for phase-coded spreadspectrum multiple-access communication – Part I: System analysis”, IEEE Trans. Commun., vol. COM-25, pp. 795–799, 1977.
• [5] A. Duel-Hallen, J. Holtzman, and Z. Zvonar, “Multiuser detection for CDMA systems”, IEEE Person. Commun., pp. 46–58, Apr. 1995.
• [6] I. Oppermann, “Orthogonal complex-valued spreading sequences with a wide range of correlation properties”, IEEE Trans. Commun., vol. COM-45, pp. 1379–1380, 1997.
• [7] I. Oppermann and B. S. Vucetic, “Complex spreading sequences with a wide range of correlation properties”, IEEE Trans. Commun., vol. COM-45, pp. 365–375, 1997.
• [8] MATLAB, “Reference guide”, The Math Works, 1996.
• [9] A. W. Lam and S. Tantaratana, “Theory and applications of spread-spectrum systems”, IEEE/EAB Self-Study Course, IEEE Inc., Pis-cataway, 1994.
• [10] B. J. Wysocki, “Signal formats for code division multiple Access wireless networks”. Ph.D. thesis, Curtin University of Technology, Perth, Western Australia, 1999.
• [11] J. E. Hershey, G. J. Saulnier, and N. Al-Dhahir, “New Hadamard basis”, Electron. Lett., vol. 32, no. 5, pp. 429–430, 1996.
• [12] P. Fan and M. Darnell, Sequence Design for Communications Applications. New York: Wiley, 1996.
• [13] D. R. Anderson and P. A. Wintz, “Analysis of a spread-spectrum multiple-access system with a hard limiter”, IEEE Trans. Commun. Techn., vol. COM-17, pp. 285–290, 1969.
• [14] J. L. Massey and J. J. Uhran, “Sub-baud coding”, in Proc. Thirteenth Ann. Allert. Conf. Circ. Syst. Theory, Oct. 1975, pp. 539–547.
• [15] M. J. E. Golay, “The merit factor of long low autocorrelation binary sequences”, IEEE Trans. Inform. Theory, vol. IT-28, pp. 543–549, 1982.
• [16] K. H. Kärkkäinen, “Mean-square cross-correlation as a performance measure for spreading code families”, in Proc. IEEE 2nd Int. Symp. Spread Spectr. Techn. Appl. ISSSTA’92, pp. 147–150.