Performance Analysis of RIS-Aided NOMA Networks in α−μ\alpha-\mu & κ−μ\kappa-\mu Generalized Fading Channel

For forthcoming 5G networks, Non-Orthogonal Multiple Access (NOMA) is a very promising techniques. and in today's world, Line of Sight communication is becoming increasingly harder to achieve. Hence, technologies like Reconfigurable Intelligent Surfaces (RIS) emerge. RIS-aided NOMA networks is a widely researched implementation of RIS. The environment where these networks are employed are non-homogeneous & non-linear in nature. The effectiveness of these systems must thus be evaluated using generalized fading channels. In this paper, the performance of a RIS-aided NOMA is compared with conventional NOMA in alpha-mu and kappa-mu channels. This paper also shows that the well-known fading distribution are special cases of these generalized fading channels, both analytically and through simulation.Comment: Reconfigurable Intelligent Surfaces, Non-Orthogonal Multiple Access, Generalized Fading Channels, 5G & Beyond 5G Network

Overlapped Scaling Tone Reservation Method for PAPR Reduction in OFDM/OQAM Systems

AbstractPeak-to-Average Power Ratio (PAPR) reduction using Tone Reservation (TR) method is studied for the application in Offset Quadrature Amplitude Modulation based Orthogonal Frequency Division Multiplexing (OFDM/OQAM) transmission using bank of filtered subcarriers. The novel TR method for the filtered subcarriers is presented, which takes into consideration the overlapping nature of the OQAM signals. To eliminate the peaks of the OFDM/OQAM signals effectively, the proposed Overlapped Scaling Tone Reservation (OS-TR) method generate the peak cancelling signal by considering the least square approximation algorithm with possible adjacent symbol overlap. Simulation results show that the proposed method used in OFDM/OQAM system can provide better performance than Controlled Clipping Tone Reservation (CC-TR) method directly used in the OFDM/OQAM system and even outperform Multi Block-Tone Reservation (MB-TR) method