Finite Blocklength Non-Orthogonal Cooperative Communication Relying on SWIPT-Enabled Energy Harvesting Relays

Abstract

A finite blocklength (FBL) twin-user non-orthogonal cooperative downlink system is considered, wherein a base station simultaneously communicates with the users whilst relying on simultaneous wireless information and power transfer (SWIPT) enabled energy harvesting relay. Closed-form analytical expressions are obtained for the end-to-end average block error rate (BLER) assuming potentially dissimilar Nakagami-m fading links. Furthermore, asymptotic expressions are derived for the individual user's end-to-end average BLER performance and diversity order at high signal to noise ratios (SNRs). Additionally, since, the stronger user's signal is detected, while assuming the weaker user's signal to be interference, an analytical bound has been obtained for characterizing the effect of this interference on the BLER performance of both users. Furthermore, a framework is developed for joint relay splitting factor and user power allocation towards end-to-end blocklength minimization under strict reliability constraints by converting the original non-convex optimization problem to a convex geometric program (GP) that can be solved efficiently. Simulation results are presented to validate the analytical expressions derived and illustrate the efficacy of the proposed scheme. Index Terms-Non-orthogonal multiple access (NOMA), finite blocklength (FBL) communication, dissimilar Nakagami-m fading links, energy harvesting, simultaneous wireless information and power transfer (SWIPT), product of Gamma random variables, geometric program (GP).

Energy and Rate Allocation for Massive Multiple Access With Interference Cancelation

“…Therein, a rough approximation for users' decoding success probabilities along SIC receiver stages is adopted. The same simplified model is adopted in [29]. Another relevant unbalance is between users' energies and rates at the receiver input.…”

Performance Analysis in the Decode-and-Forward Full-Duplex Relaying Network with SWIPT

“…Fortunately, wireless power transfer (WPT) can be considered as a promising solution. Particularly, since the RF signals can contain both energy and information, simultaneous transmit information and energy transfer (SWIPT) has recently attracted significant attention from researchers [ 20 , 21 ]. Qian et al [ 20 ] studied a buffer-aided differential chaos-shift-keying-based simultaneous wireless information and power transfer (DCSK-SWIPT) relay system over multipath Rayleigh fading channels.…”

“…By using Meijer G-function and Gauss–Hermite approach, they obtained bit error rate (BER) and average-delay closed-form expressions. Akash et al [ 21 ] considered a NOMA SWIPT-enabled cooperative communication system with a finite blocklength (FBL) twin-user. Based on the proposed model, novel closed-form analytical expressions for the end-to-end average block error rate (BLER) are obtained.…”

Outage and throughput analysis of power-beacon assisted nonlinear energy harvesting NOMA multi-user relay system over Nakagami-m fading channels

“…In [18], the SWIPT-enable relay exploited the RF energy supplied by the two NOMA user groups to recharge itself. Meanwhile, in [19], the source was powered by an external source, whereas the relay employs power splitting SWIPT-based EH to harvest the energy from the source before transmitting signals to two users. As mentioned earlier, the EH techniques considered in [18] and [19] were SWIPT.…”