Toward multi relay selection aided two-way multi-users cooperative GSPIM-DCSK communication system

Abstract

To improve the error quality of a single-relay two-way half-duplex cooperative communication system based on a Joint Grouping Subcarrier and Permutation Index Modulations DCSK (GSPIM-DCSK), a novel multi-relay two-way multi-user half-duplex cooperative communication system is offered in this work. The GSPIM-DCSK scheme serves as the foundation for this system's architecture.  In this system, many relays are established, but during the relaying phase, only one relay is used to transmit network-coded data to the consumers. Every relay node in this network is assumed to be using the protocol method called Decode and Forward (DF). To determine which relay should be chosen, the max-sum ( ), max-min ( ), and max-product ( ) relay-selection methodologies are employed. Particularly, these requirements are used at the relay's reception to produce two judgment numbers, which are subsequently subjected to further processing via procedures such as sum, product, or min. The parameters of all relays are then compared to see which one is more reliable for relaying after this process. The performance of the novel system is evaluated by acquiring and applying the simulation findings at multipath Rayleigh fading channels. Furthermore, a comparative analysis is conducted between the cooperative system-based DCSK and GSPIM-DCSK that utilizes a single relay and a novel cooperative-based GSPIM-DCSK system that utilizes multiple relays. The average bit error rate (BER) performance is included in this. Moreover, an examination shows how the suggested cooperative system raises the effectiveness of traditional cooperative systems.