Design and Analysis of Three-Way Relay Network Coding Schemes Based Differential Chaos Shift Keying Communication System

Abstract

In this paper, a three-way relay network coding schemes based differential chaos shift keying (DCSK) communication system are investigated. Two schemes of physical layer network coding (PLNC) schemes are proposed to communicate between three users. In the first scheme, three users send their information’s using DCSK modulation in different time slots to the relay, then two encoded bits are extracted from the received bits. After that, the relay broadcast the two encoded bits to three users using DCSK modulation in different time slots. To improve the throughput, energy and spectral efficiency of scheme-1, a new model of PNC scheme is developed based on multiple access DCSK (MA-DCSK) and quadrature chaos shift keying (QCSK) systems. In the first phase, the users send their information’s via MA-DCSK, while in the second phase, the relay broadcast the two encoded bits using QCSK system. In both schemes, the BER analytics are derived and compared with the simulated results under AWGN and multipath Rayleigh fading channel. Furthermore, throughput, link bandwidth and energy efficiency are also derived and compared for two schemes.