Multi-User-OFDM based Orthogonal Chaotic Vectors Shift Keying Communication System

Ansam M. Abedand and Fadhil S. Hasan

This paper, presents a Multi-user OFDM based Orthogonal Chaotic Vector Shift Keying (MU-OFDMOCVSK) modulation over AWGN and multipath fading channels. In this scheme, we use Gramm-Schmidt orthonormalization process to increase the orthogonality of the chaotic sequences and produce orthogonal chaotic vectors (OCV) so as to reduce the multi-user interference (MUI). The proposed procedure is suitable else for the other comb-type non-coherent systems with similar structure. The bit error rate performance is evaluated over multipath Rayleigh fading and additive white Gaussian noise channels, in the existence of multi-user interference and the analytical bit error rate (BER) equations are derived. the accuracy of our study is affirmed by Simulation results which show the advantages of this approach.

Volume 12 | Issue 5

Pages: 320-329

DOI: 10.5373/JARDCS/V12I5/20201720