PAPR and BER analysis of FBMC-OQAM systems using Tangent Rooting Companding

Abstract

Filter Bank Multicarrier (FBMC) is an enhanced multicarrier waveform technique, and a suitable contender for 5G systems owing to its high spectral efficiency, low out-of-band (OOB) leakage, and robustness to time and frequency asynchronism. Being a multicarrier waveform technique, it suffers from high peak-to-average-power ratio (PAPR). In this paper, tangent rooting companding is investigated both in terms of PAPR reduction performance and bit-error-rate (BER) performance for FBMC-Offset QAM (OQAM) systems. It was observed that, it performs better than A-law, mu-law, and rooting companding techniques in terms of PAPR reduction but leads to BER degradation in comparison to A-law and mu-law techniques. It was also observed that by varying the companding parameters BER performance improves but at the cost of reduced PAPR reduction gain. It was also observed that the tangent rooting companding performs better than some existing techniques in the literature for PAPR reduction of FBMC-OQAM systems.