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Frequency-Splitting SWIPT with Joint Signal Detection and Non Linear Distortion Compensation

Rajaram, A. ; Dinis, R. ; Guerreiro, J. ; Jayakody, D. ; Beko, M.B.

Frequency-Splitting SWIPT with Joint Signal Detection and Non Linear Distortion Compensation, Proc IEEE International Conference on Electrical, Computer, Communications and Mechatronics Engineering ICECCME'2021, Mauritius, Mauritius, Vol. , pp. - , October, 2021.

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Abstract
Frequency splitting based simultaneous wireless in- formation and power transmission (FS-SWIPT) is one of the novel SWIPT schemes that can be used with orthogonal fre- quency division multiplexing (OFDM) or with other frequency division multiplexing techniques. In this work, we implement FS-SWIPT with OFDM signals and adopt separate subcarriers for data and energy carrying symbols. The main advantage of FS-SWIPT is that the data symbols do not suffer energy loss. However, the amplification of high power symbols can lead to nonlinear distortion and considerable performance degrada- tion. To tackle the nonlinear distortion effects, we propose a joint signal detection and distortion compensation scheme. This compensation technique takes advantage of the known energy symbols and improves the performance comparatively with the case where energy symbols are not transmitted. We validate the analytical results of the nonlinear distortion effects and analyse the improvements in bit error rate (BER) performance of FS- SWIPT by using Monte Carlo simulations.