Performance Analysis of Bit Error Rate (BER) in OFDM System by Integrating with the Discrete Fractional Fourier Transform (DFrFT)

Abstract

Orthogonal system division multiplexing is one of the most commonly used LTE in today’s world. It provides high data rate, high speed and low complexity compared to conventional methods such as CDMA, TDMA and FDMA. Thus OFDM also offers some of the disadvantages such as bit error rate, PAPR, ICI, ISI etc,. In this paper, the performance of BER is evaluated by integrating the Orthogonal system division multiplexing (OFDM) with Discrete Fractional Fourier Transform (DFrFT). The performance of the signal is evaluated by considering the total number of subcarriers as 64 where 48 of them are data carriers with a predefined bandwidth of 20MHz.The generated random signal is transmitted through Additive White Gaussian Noise (AWGN) channel to the receiver section. The performance of the Bit Error Rate (BER) is evaluated by the ratio of a function of energy per bit to noise power spectral density . Simulation results shows the comparison of BER performance for booth the conventional method as well as the proposed scheme.