Abstract
Orthogonal and quasi-orthogonal codes are integral part of any DS-CDMA based cellular systems. Orthogonal codes are ideal for use in perfectly synchronous scenario like downlink cellular communication. Quasi-orthogonal codes are preferred over orthogonal codes in the uplink communication where perfect synchronization cannot be achieved. In this paper, we attempt to compare orthogonal and quasi-orthogonal codes in presence of timing synchronization error. This will give insight into the synchronization demands in DS-CDMA systems employing the two classes of sequences. The synchronization error considered is smaller than chip duration. Monte-Carlo simulations have been carried out to verify the analytical and numerical results.
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References
Pursley, M.: Performance Evaluation for Phase-Coded Spread-Spectrum Multiple-Access Communication–Part I: System Analysis. IEEE Trans. Commn 25, 795–799 (1977)
Zhu, J., Nomura, T., Yamada, T.: Performance of Spread Spectrum Synchronous access Communication system by Orthogonal Sequences. IEICE Trans. Commn 68, 319–326 (1985)
Lin, X.D.: Optimal PN sequence design for quasi-synchronous CDMA communication systems. IEEE Trans. Commn 45, 221–226 (1997)
Houtum, W.J.V.: Quasi-synchronous code-division multiple access with high-order modulation. IEEE Trans. Commn. 49, 1240–1249 (2001)
Dasilva, V.M.V., Sousa, E.S.: Multicarrier Orthogonal CDMA signals for quasi-synchronous communication systems. IEEE JSAC 12, 842–852 (1994)
Khairy, M.M., Geraniotis, E.: Effect of time-jitter on CDMA networks with orthogonal and quasi-orthogonal sequences. In: Proceedings of Symposium on Computers and Communications, pp. 260–264 (1997)
Matolak, D.W., Manchiraju, D.: Evaluation of pseudorandom sequences for third generation spread spectrum systems. In: Proceedings of Southeastern Symposium on system theory 2003, pp. 288–290 (2003)
Sunay, M.O., McLane, P.J.: Sensitivity of a DS CDMA system with long PN sequences to synchronization errors. In: Proceedings of ICC 1995, pp. 1029–1035 (1995)
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© 2009 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering
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Jos, S., Kumar, P., Chakrabarti, S. (2009). Performance Comparison of Orthogonal and Quasi-orthogonal Codes in Quasi-Synchronous Cellular CDMA Communication. In: Wang, C. (eds) AccessNets. AccessNets 2008. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 6. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04648-3_6
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DOI: https://doi.org/10.1007/978-3-642-04648-3_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-04647-6
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