期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2018
卷号：96
期号：12
出版社：Journal of Theoretical and Applied
摘要：Orthogonal frequency division multiplexing (OFDM) is dependable in data transmission with high speed by the benefit of its robustness to multi-path fading, high data rate, and high spectral efficiency. OFDM is a multi-carrier modulation scheme. Synchronization is the major problems of the OFDM system. In this research, the power consumption was considering through a noisy channel when an image was transmitted in the OFDM system. To support the work, many features were tested such as minimizing the complexity with fast Fourier transforms/inverse fast Fourier transform (FFT/IFFT). The size of bandwidth (BW) play the main role and how its effect on the transmission and how its related to the FFT size (Nfft). The modulation type was also tested to see which one is the best for image transmitted. These types are phase shift keying (PSK) and quadrature amplitude modulation (QAM). In addition, signal to noise ratio (SNR) is one of the performances in OFDM system and consider one of the factors which wireless communication depends on related with bit error rate (BER). Another drawback of the OFDM system was Peak-to- average power ratio (PAPR), therefore, the effect of Nfft on the PAPR has been tested with simulation results in which additive white Gaussian noise (AWGN) had been used in the MATLAB simulation.
关键词：Bit Error Rate; Fast Fourier Transform; Orthogonal frequency division multiplexing; Peak-to- Average power ratio; Signal-to-Noise Ratio.
