On the Effect of Chip Synchronization Error in MC-CDMA Systems

  • Luciano Tomba
  • Witold A. Krzymien
Part of the The Kluwer International Series in Engineering and Computer Science book series (SECS, volume 366)


In this paper we investigate the effect of chip synchronization error (or chip timing jitter) in multi-carrier code division multiple access (MC-CDMA) schemes for indoor environments. We model the chip timing jitter as a stationary random process with a known statistic and the error produced by chip timing jitter as an additive noise source. We evaluate the spectral density of this noise and we show that it can be split into two uncorrelated components. These results are important because they allow us to use an analytical or semi-analytical formula for the error probability evaluation. This is helpful, because the simulation of a MC-CDMA system is complex and time consuming. To mitigate the effect of chip synchronization error, a time diversity technique (average diversity combining) is suggested.


Additive White Gaussian Noise OFDM Symbol Additive White Gaussian Noise Channel Symbol Duration Additive Noise Source 
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  1. [1]
    N. Yee, J.P. Linnartz and G. Fettweis, “Multi-carrier CDMA in indoor wireless radio networks,” in Proc. PIMRC ’93, pp. 109–113, Yokohama, Sept. 1993.Google Scholar
  2. [2]
    L. Vandendorpe, “Multitone spread spectrum multiple access communications system in a multipath Rician fading channel,” IEEE Trans. on Vehicular Technology, vol. 44, no. 2, pp. 327–337, May 1995.CrossRefGoogle Scholar
  3. [3]
    A. Chini, M.S. El-Tanany, S.A. Mahmoud, “High rate ATM packet transmission over indoor radio channels,” in Proc. VTC ’95, pp. 195–199, Chicago, July 1995.Google Scholar
  4. [4]
    T. Pollet, M. Van Bladel and M. Moeneclaey, “BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise,” IEEE Trans. on Commun., vol. 43, no. 2/3/4, pp. 191–193, Feb./Mar./Apr. 1995.Google Scholar
  5. [5]
    E. Viterbo, K. Fazel, “How to combat long echoes in OFDM transmission schemes: sub-channel equalization or more powerful channel coding,” in Proc. GLOBECOM ’95, pp. 2069–2074, Singapore, Nov. 1995.Google Scholar
  6. [6]
    J.G. Proakis, Digital Communications. 3rd ed., New York, McGraw-Hill 1995.Google Scholar
  7. [7]
    T. Pollet and M. Moeneclaey, “Synchronizability of OFDM signals,” in Proc. GLOBECOM ’95, pp. 2054–2058, Singapore, Nov. 1995.Google Scholar
  8. [8]
    G. Wu, A. Jalali, P. Mermelstein, “On channel model parameters for microcellular CDMA systems,” IEEE Trans, on Vehic. Technol., vol. 44, no. 3, pp. 706–711, Aug. 1995.CrossRefGoogle Scholar
  9. [9]
    S. Souissi, S. B. Wicker, “A diversity combining DS/CDMA system with convolutional encoding and Viterbi decoding,” IEEE Trans, on Vehicular Technology, vol. 44, no. 2, pp. 304–312, May 1995.CrossRefGoogle Scholar
  10. [10]
    S. Kaiser, “On the performance of different detection techniques for OFDM-CDMA in fading channels,” in Proc. GLOBECOM ’95, pp. 2059–2063, Singapore, Nov. 1995.Google Scholar
  11. [11]
    H. Sari, G. Karam, and I. Jeanclaude, “Transmission techniques for digital terrestrial TV broadcasting,” IEEE Commun. Magazine, vol. 33, no. 2, pp. 100–109, Feb. 1995.CrossRefGoogle Scholar
  12. [12]
    L. Tomba and W.A. Krzymien, “Downlink detection schemes for MC-CDMA systems in indoor environments,” submitted to IEICE Transactions, Special Issue on Personal Communications.Google Scholar

Copyright information

© Kluwer Academic Publishers, Boston 1996

Authors and Affiliations

  • Luciano Tomba
    • 1
  • Witold A. Krzymien
    • 2
  1. 1.University of Padova/TRLabsItaly
  2. 2.University of Alberta/TRLabsCanada

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