PAPR reduction of FBMC-OQAM using A-law and Mu-law companding

Filter bank multicarrier scheme is an efficient multicarrier scheme and candidate waveform for 5G. Similar to OFDM and other multicarrier schemes, FBMC also has high Peak-to-Average Power Ratio (PAPR) which leads us to the use of high power amplifiers with high dynamic range. Companding techniques are used to reduce PAPR at the expense of bit error rate (BER) performance degradation. In this paper, a novel usage of A-law and Mu-law companding techniques for PAPR reduction of FBMC-OQAM scheme are proposed. The paper also investigates the tradeoff between PAPR reduction and Bit error rate performance of FBMC-OQAM using A-law and Mu-law companding techniques. Simulation results have shown a significant decrease in PAPR but BER of the system has increased. Both the companding techniques have shown similar results but Mu-law companding has given a slightly better performance than A-law companding in PAPR reduction but BER of A-law companding is better than Mu-law companding.