Testing The Effective Performance Of Ofdm On Digital Video Broadcasting

Abstract

One of the most exciting areas in telecommunications and networking is wireless technology. The rapid growth of mobile telephone uses various satellite services. So, the present work deals with high data stream applications of Digital Video Broadcasting (DVB), which takes an important place

in the studies and development researches due to its direct contacts on the human daily life. In this design the focusing is on the modern types of DVB where

modified module of the Terrestrial DVB for Handheld terminals (DVB-H) is used and it was simulated to perform the physical layer of the designed system.

Different modes of DVB-H with high bit rate of Orthogonal Frequency Division multiplexing (OFDM) and high number of sub-carriers are considered to

show the effect of Coded Orthogonal Frequency Division multiplexing (COFDM) on the system SNR using the convolutional encoding. The modes are

tested to show the characteristics of each type involving BER calculation. The obtained results show the effect of OFDM in the designed system by

evaluating it using AWGN and mobile multipath channels. These demonstrate the effective of OFDM over single carrier systems where the complexity and

cost of implementation are both increaseed by increasing number of carrier. The elimination of ISI is achieved using efficient coding techniques with small

guard time. The 4k mode shows good performance in mobile reception, providing satisfactory and reasonable receiver cost/complexity. The Peak Signal

to Noise Ratio (PSNR) measurement of the reconstructed received image pixels provides more mentality and good comparing method than the BER

measuring. The obtained results are compared between the PSNR of each reconstructed images for different modes with the corresponding transmitting

SNR