Title :
A new multicarrier multicode DS-CDMA scheme for time and frequency selective fading channels
Author :
Cao, Yewen ; Tjhung, Tjeng Thiang ; Ko, Chi Chung
Author_Institution :
School of Computing, University of Glamorgan, UK
fDate :
3/1/2005 12:00:00 AM
Abstract :
In this paper, a new multicarrier, 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 :
Bit error rate; Convolution; Convolutional codes; Decoding; Fading; Jamming; Multiaccess communication; DS-CDMA; multicarrier CDMA system; multicode transmission;
Journal_Title :
Communications and Networks, Journal of
DOI :
10.1109/JCN.2005.6387752