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A Simplified GCS-DCSK Modulation and Its Performance Optimization

Research paper by Weikai Xu, Lin Wang, Chong-Yung Chi

Indexed on: 10 Jan '17Published on: 29 Dec '16Published in: International journal of bifurcation and chaos in applied sciences and engineering



Abstract

International Journal of Bifurcation and Chaos, Volume 26, Issue 13, 15 December 2016. In this paper, a simplified Generalized Code-Shifted Differential Chaos Shift Keying (GCS-DCSK) whose transmitter never needs any delay circuits, is proposed. However, its performance is deteriorated because the orthogonality between substreams cannot be guaranteed. In order to optimize its performance, the system model of the proposed GCS-DCSK with power allocations on substreams is presented. An approximate bit error rate (BER) expression of the proposed model, which is a function of substreams’ power, is derived using Gaussian Approximation. Based on the BER expression, an optimal power allocation strategy between information substreams and reference substream is obtained. Simulation results show that the BER performance of the proposed GCS-DCSK with the optimal power allocation can be significantly improved when the number of substreams [math] is large.