Abstract
Among non-coherent chaos-based communication schemes, improved-differential chaos-shift keying (I-DCSK) with the use of time-reversed chaotic sequences shows good achievement in bit-error-rate (BER) performance and spectral efficiency. To date, BER performance of the I-DCSK system has been investigated over various transmission channels in the presence of Gaussian noise and Rayleigh fading. In this paper, we studied for the first time the performance of the I-DCSK system over a land mobile satellite channel. Discrete-time models of the transmitter and receiver over a two-state Lutz channel typically describing satellite environments are studied. We point out that there are differences in cross-correlation characteristics between the time-reversed and conventional chaotic sequences. From this aspect, BER performance of the studied system is analyzed in scenario of taking into account the cross-correlation effect of time-reversed chaotic sequences. BER expressions are verified by Monte Carlo simulations. Performance comparison between I-DCSK and DCSK-based schemes over the studied channel is carried out. Obtained results prove that the I-DCSK system is able to be used as a physical-layer modulation method using chaos for land mobile satellite applications.
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