Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A New Multicarrier Multicode DS-CDMA Scheme for Time and Frequency Selective Fading Channels

  • Cao Yewen (School of Computing, University of Glamorgan) ;
  • Tjhung Tjeng Thiang (Institute for Infocomm Research, Singapore Science Park II) ;
  • Ko Chi Chung (Department of Electrical & Computer Engineering, National University of Singapore)
  • Published : 2005.03.01
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Abstract

In this paper, a new multi carrier, direct sequence code division multiple access (MC-DS-CDMA) system is proposed. Our new signal construction is based on convolutional encoding of the transmitted data, serial-to-parallel (S/P) conversion of the encoded data, Walsh-Hadamard-transformation (WHT), a second S/P conversion of the WHT outputs, spread spectrum (SS) modulation with a common pseudo-noise (PN) sequence, and then multicarrier transmission. The system bit error rate (BER) performance in frequency selective fading channel in the presence of additive white Gaussian noise (AWGN) and a jamming tone is analyzed and simulated. The numerical results are compared with those from an orthogonal MC-DS-CDMA system of Sourour and Nakagawa [7]. It is shown that the two systems have almost the same BER performance, but the proposed scheme has better anti-jamming ability.

Keywords

References

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