Enhancing Future Wireless Systems through Advanced Physical Layer Mechanisms

In recent years, the rapid growth of new-generation wireless networks has spurred a research thrust in cooperative communication and it is a powerful physical layer technique to combat fading in wireless relaying scenario. Recently, chaos based communication with its excellent features has been proved to be an appropriate choice for the emerging wireless networks. Different chaos based modulation schemes has been analysed with immense literature, of which the Code Shifted-Quadrature Chaos shift Keying (CS-QCSK) modulation technique with its code domain approach provides better BER performance and spectral efficiency. In the coding scenario, Reduced Golden Ratio-Golden codes (RGR-GC) has been proved to exhibit better Bit Error Rate (BER) performance with less complexity than any other space time block codes in [29]. The forementioned coding scheme (RGR-GC) and the modulation scheme (CS-QCSK) are concatenated to obtain a suitable combination approach (RGR-GC_CS-QCSK) which enhances the performance significantly has been discussed in [30]. This paper aims to test the suitability of proposed technique in a cooperative relaying scenario. The single relay cooperative scenario consisting of source, relay and destination are considered with the Decode and forward (DF) protocol. The simulation results have validated the effectiveness of the proposed scheme by offering better BER performance, minimum outage probability and increased spectral efficiency compared to the non cooperative transmission method. Key-Words: Code Shifted-Quadrature Chaos shift Keying (CS-QCSK), Reduced Golden Ratio-Golden codes (RGR-GC), modified golden codes, Decode and forward (DF) protocol, single physical layer entity, cooperative communication.