Performance analysis of differential chaos shift keying modulation with transmit antenna selection

Abstract

Differential chaos shift keying (DCSK) modulation-based transmit antenna selection (TAS) schemes are proposed to reduce the effect of signal fading with less hardware complexity at the receiver. The transmitter adopts DCSK modulation and employs multiple antennas, whereas the receiver can have single/multiple antennas. On the basis of receiver structure/specifications some TAS schemes are presented. In particular, for multiple transmit antennas and single receive antenna system DCSK-TAS scheme is proposed and for multiple transmit and multiple receive antenna system, two schemes, i.e. DCSK-joint antenna selection and DCSK-TAS/equal gain combining (DCSK-TAS/EGC), are proposed. The probability of error of the proposed schemes is numerically evaluated in the presence of perfect feedback and feedback error in Nakagami-m fading channels. The proposed schemes completely outperform the conventional DCSK scheme with one transmit and one receive antenna. The results show that the DCSK-TAS/EGC has the best error performance among the proposed schemes. Throughput of the proposed schemes is also presented and compared. The error performance of the proposed schemes are numerically evaluated and plotted for the parameters of interest. The simulation results verify the theoretical results. � 2016, The Institution of Engineering and Technology.