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Network Synchronization of an Orthogonal CDMA Satellite Communication System

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This paper provides the network synchronization of an orthogonal CDMA geostationary satellite system for fixed service communications. It includes the synchronization procedures, the system architecture and the performance evaluation. The main objective is to provide network wide synchronization of all uplink orthogonal CDMA transmissions. This is achieved in steps; first by providing coarse synchronization using the uplink random access channel and then fine sync using innovative tracking control mechanisms. The uplink access channel receiver utilize a parallel/serial search method for rapid code acquisition, while the code tracking of the uplink orthogonal CDMA traffic channel is based on a delay feedback early-late gate in which the sych control resides in the receiver. The proposed system is designed to minimize the onboard complexity and satisfy the performance requirements. As shown in the performance section, the requirement that all uplink transmissions are synchronized to a reference time within 10% of the chip length can be achieved. In addition, the system analysis determines the design parameters values which optimize performance.

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  1. 1.

    D. Gerakoulis, E. Geraniotis, R. Miller, and S. Ghassemzadeh, “A Satellite Switched CDMA (SS/CDMA) System Architecture for Fixed Service Communications”, Submitted to IEEE Commun. Magazine, July 1999, pp. 86–92.

  2. 2.

    Gerakoulis D., Geraniotis E. (2001) “Code Division Access and Switching for Multi-beam Satellite Communications”. Space Communications, an international journal, IOS press, Special Issue: on-board processing, 17(1–3):69–86

  3. 3.

    De Gaudenzi R., Giannetti F., Luise M. (January 1996) “Advances in Satellite CDMA Transmission for Mobile and Personal Communications”. Proc. IEEE, 84(1):18–39

  4. 4.

    Magill D.T., Natali F.D., Edwards G.P. (April 1994) “Spread-Spectrum Technology for Commercial Applications”. Proc. IEEE, 82(4):572–584

  5. 5.

    J.K. Omura and P.T. Yang, “Spread-Spectrum S-CDMA for Personal Communication Services”, MILCOM’92, pp. 11.3.1–5

  6. 6.

    Zhuang W. (November 1996) “Noncoherent Hybrid Parallel PN Code Acquisition for CDMA Mobile Communications”. IEEE Trans. Vehicular Tech., 45(4):643–656

  7. 7.

    Rick R.R., Milstein L.B. (August 1997) “Parallel Acquisition of Spread-Spectrum Signals with Antenna Diversity”. IEEE Trans. Commun., 45(8):903–905

  8. 8.

    Braun W.R. (December 1997) “PN Acquisition and Tracking Performance in DS/CDMA Systems with Symbol-Length Spreading Sequences”. IEEE Trans. Commun., 45(12):1595–1601

  9. 9.

    Su S.-L., Yen N.-Y. (May 1997) “Performance of Digital Code Tracking Loops for Direct-Sequence Spread-Spectrum Signals in Mobile Radio Channels”. IEEE Trans. Commun. 45(5):596–604

  10. 10.

    Viterbi A.J. (1995) CDMA: Principles of Spread Spectrum Communications. Addison-Wesley, Massachusetts

  11. 11.

    H.-J. Su, P. Li, E. Geraniotis, and D. Gerakoulis, “Code Tracking Loop Performance for an Orthogonal CDMA Uplink SATCOM System”, Conference proceedings, IEEE ISCC’98, Athens, Greece.

  12. 12.

    Frankin G.F., Powell J.D., Workman M.L. (1990) Digital Control of Dynamic Systems, 2nd ed. Addison-Wesley, Massachusetts

  13. 13.

    Jovanovic V.M. (May 1992) “On the Distribution Function of the Sread-Spectrum Code Acquisition Time”. IEEE J. Select. Areas Commun., 10(4):760–769

  14. 14.

    M. P. Pursley, “Spread Spectrum Multiple Access Communications”. In: G. Longo (ed.), Multi-User Communications Systems. Springer-Verlag 1981, pp. 139–199.

  15. 15.

    Peterson R.L., Ziemer R.E., Borth D.E. (1995) Introduction to Spread Spectrum Communications. Prentice Hall, New Jersey

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Correspondence to Diakoumis Gerakoulis.

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Gerakoulis, D., Su, H. & Geraniotis, E. Network Synchronization of an Orthogonal CDMA Satellite Communication System. Wireless Pers Commun 42, 63–84 (2007). https://doi.org/10.1007/s11277-006-9167-x

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  • Network synchronization
  • Orthogonal CDMA
  • Satellite communications