Abstract
Given the ability of orthogonal frequency division multiplexing (OFDM) to manage strict channels, it is a largely accepted multicarrier modulation method in current wireless communications, especially those with high data rate. In this study, an image was transmitted with considering the power consumption, which was received by the noisy channel of the OFDM systems. Many factors had been tested to support the work and to make the ideas specifically, the size of the fast Fourier transforms/inverse fast Fourier transform (FFT/IFFT) was tested to minimize complexity, which is the behavior of a system's process of transmitting and receiving data with less suffering. The bandwidth (BW) size was also considered, and who much it effects of the transmission process. The type of modulation, to choose the type of modulation, we use phase shift keying (PSK) and quadrature amplitude modulation (QAM) on the simulation and obtain a perfect modulation type of OFDM systems. Furthermore, signal-to-noise ratio (SNR), which is one of the main performance metrics of OFDM systems, was considered to determine its effect on the signal. Simulation results show, the effect of SNR on the bit error rate (BER) and the effect of the FFT number (nFFT) on the BER. Peak-to-power ratio (PAPR) is the main disadvantage of OFDM, thus our results take into account an effect of the nFFT on PAPR. The study focused on the BER with respect to SNR and to the nFFT, as well as the PAPR with respect to the nFFT. All simulation results were defined using a channel of additive white Gaussian noise (AWGN). Performance evaluation results were obtained through simulation using MATLAB.