On Feb. 25, 2021, Eng. Abdelwahed Mohamed, Former ONE Lab Master student, has an accepted journal paper at IEEE Access journal titled “A Novel Companding Technique to Reduce High Peak to Average Power Ratio in OFDM Systems“. The paper is a collaboration between Cairo University, Zewail City of Science and Technology, and Nile University.
In this paper, a new technique for decreasing the high PAPR in OFDM with minimum effects on the system performance is proposed. The technique uses the image adjust (IMADJS) function to reduce the high PAPR of transmitted OFDM signals by compressing large signals and expanding small signals. In comparison, the IMADJS strategy has the advantage of maintaining a constant average power level before and after companding. A comparative analysis is provided between the proposed (IMADJS) technique and well-known companding techniques such as A-law, absolute exponential (AEXP), and the new error function (NERF). The comparison is based on PAPR, bit error rate (BER), power spectral density (PSD), and average power performance metrics. Simulation results confirm that the IMADJS technique significantly improved the drawbacks of the PAPR.
