Design & Development of High Data Rate Orthogonal Frequency Division Multiplexing System Using FFTs

Abstract: In recent years, Orthogonal Frequency Division Multiplexing (OFDM) has been successfully used in terrestrial digital video broadcasting and showed it is a strong candidate for the modulation technique of future wireless systems. This paper is concerned with how well OFDM performs in digital broadcasting when transmitted over an Additive White Gaussian Noise (AWGN) channel only. The main objective of this work is to design an OFDM system for digital broadcasting standard. In this, it uses 2k mode and 8k mode system. OFDM is based on FFT based subcarriers. The main problem in OFDM is PAPR value. So, in this work, it also improves the value of PAPR under different modulation formats. The Digital Video Broadcasting Project (DVB) is a multinational initiative to standardize digital broadcasting worldwide. The purpose of this paper is to provide a simulation of the process involved in the generation and reception of an OFDM signal in a physical channel and to provide a description of each of the steps involved.

Keywords: OFDM System, Digital Broadcasting, QAM modulation, Demodulation etc.