Performance Analysis for IRS-NOMA Aided Multi-User Cooperative Relay System
With the large-scale application of fifth-generation(5G)communication technology,the number of devices connected to the network has grown rapidly,leading to enormous data traffic and connectivity demands.Although 5G technology has significantly increased transmission rates and network capacity,the widespread adoption of Internet of Things(IoT)devices and the rise of high-speed data services have made the current frequency bands insufficient to sat-isfy future demands.Predictions indicate that the peak transmission rate of sixth-generation(6G)communication tech-nology will increase to 1 terabit per second,approximately 100 times that of 5G.This substantial increase in speed will further exacerbate the demand for bandwidth,making it inevitable that existing frequency bands will be unable to satisfy the requirements of new high-speed services and large-scale IoT terminals.Therefore,the future development of commu-nication technology must expand to higher frequency bands.Against this backdrop,in this study,a novel multi-user re-lay system,which integrates intelligent reflecting surface(IRS)technology into non-orthogonal multiple access(NOMA)relay networks,is proposed.IRS is an emerging technology that can significantly improve the performance of wireless communication systems by intelligently controlling the phase,amplitude,and polarization of reflected signals.By applying IRS technology to NOMA relay networks,we can completely leverage its intelligent control capabilities to enhance the spectral and energy efficiency of the system.Specifically,we integrate IRS controllers with relays to create a new relay node that not only amplifies and forwards signals but also optimizes the signal path through IRS,reducing interference and improving signal quality and system capacity.Theoretical analysis and simulation results on the down-link side demonstrate that the system performance improves by an average of 30%after incorporating IRS.This signifi-cant performance enhancement proves the potential of IRS technology in NOMA relay networks,providing new ideas and methods for future applications.With the advent of the 6G era,IRS technology is expected to play a more signifi-cant role in higher frequency communication systems.This,in turn,will further promote the development and progress of wireless communication technology.
non-orthogonal multiple access(NOMA)decode and forward relayintelligent reflecting surface(IRS)next-generation communication system
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