Research On SWIET In Wireless Cooperative Double Relay Network

After decades of development,wireless communication technology has made rapid progress.The update of each wireless device can significantly improve the reliability of communication,data transmission rate,equipment energy saving and network connection.With the rapid development of information and communication industry,a large number of communication equipment emerged all need the power supply,especially in some harsh,remote,or wireless communication equipment for special applications,such as medical micro-chip implanted in the body or the building structure in the embedded wireless sensor nodes,how to go to the wireless communication device to provide a continuous and stable power supply equipment and to prolong the lifetime of the whole network,has become an urgent problem.Therefore,the energy harvesting technology is proposed,and the research of energy harvesting technology of relay based on network has become the focus of current research.This paper proposes a new energy harvesting technology that collects energy from radio signals(radio-frequency,RF)in the surrounding environment,combination of relay and cooperative communication technology,wireless network of energy harvesting relay,on the outage performance of the network system of the specific work is as follows:In view of the decode-and-forward(DF)protocol,the system performance of SWIET system is studied in the system of one way transmission and double relay cooperation.In order to collect energy RF signal from the source to the passive relay issued,and used to assist the user transmission system,propose a method based on time switching-based double relay cooperative transmission(TSDRCT),analysis of interrupt closed form expressions of the outage performance and the probability of the protocol system in Rayleigh channel the system,at the end of the transmission system is studied by numerical simulation experiments.The simulation results demonstrate the accuracy of the theoretical analysis,and also show that the proposed TSDRCT with energy harvesting relay is much better than traditional non-cooperative scheme in term of outage probability,and it does not increase system energy consumption.In addition,compared with the simulation results of the similar transmission model,the proposed model has better performance.The relay adopts amplify-and-forward(AF)protocol,performance of double relay system to study the deployment of simultaneous wireless information and energy transfer technology,is the quantitative description of the system outage performance is given.To enable the simultaneous information processing and energy harvesting at the relay,a time-switching(TS)based two relays transmission(TSDR)protocol is proposed,and the outage performance under this protocol is theoretically analyzed,then an explicit expression for the outage probability is derived.Finally,the effect of time division factor,source transmission power and relay location on the outage probability is simulated.The results verify the theoretical analysis and show that direct transmission outperforms the proposed TSDR scheme in term of outage probability.