[01] Isiaka A. Alimi, Department of Electrical and Electronics Engineering, School of Engineering and Engineering Technology, Federal University of Technology, Akure, Nigeria.

Orthogonal Frequency Division Multiplexing (OFDM) has been employed for broadband wireless transmission due to the related advantages such as robustness against multipath fading, high data rate and high spectral efficiency. However, the issue of the associated high peak-to-average power ratio (PAPR) needs further consideration to prevent intermodulation noise and out-of-band radiation between the OFDM subcarriers that bring about bit error rate (BER) degradation. High PAPR put a stringent need for linear power amplifier on the system and as a result, it causes an increase in the system cost. This paper focuses on experimental demonstration of effectiveness of OFDM in mobile communication systems. To investigate this, the performance of OFDM over both Rayleigh and additive white Gaussian noise (AWGN) channels is compared with the equalization schemes such as ZF and MMSE. Furthermore, the OFDM technical issue based on the associated PAPR and its reduction are investigated. The simulation results show that the OFDM scheme significantly reduced the effect of multipath fading in wireless communication systems with improved BER value. Also, it is observed that the selected mapping (SLM) scheme considerably reduce PAPR of OFDM signal.

CCDF, OFDM, PAPR, PTS, SLM

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