Title :
Performance enhancement of image transmission using UEP overlayed UTG_OFDM scheme
Author :
Salah, M.M. ; Elrahman, Ashraf A ; Mokhtar, M.M.
Author_Institution :
Egyptian Armed Forces, Cairo
Abstract :
In this paper, an OFDM scheme for image transmission is proposed. The scheme is based on unequal cyclic time guard (UTG) of conventional OFDM. The performance of the UTG_OFDM is compared with the conventional OFDM. The results show better performance of the former at lower average cyclic extension period. To enhance the performance at lower signal-to-noise ratio, convolution coding is combined with the OFDM method, where unequal error protection (UEP) is overlayed the UTG_OFDM scheme. The results show remarkable improvement in image quality compared to the equal error protection (EEP) with equal time guard over multipath channels.
Keywords :
OFDM modulation; convolutional codes; multipath channels; visual communication; UEP; UTG_OFDM scheme; equal error protection; image quality; image transmission; lower average cyclic extension period; multipath channels; signal-to-noise ratio; unequal cyclic time guard; unequal error protection; AWGN; Delay; Error correction codes; Fading; Fast Fourier transforms; Image communication; Intersymbol interference; OFDM modulation; Robustness; Streaming media;
Conference_Titel :
Radio Science Conference, 2008. NRSC 2008. National
Conference_Location :
Tanta Univ.
Print_ISBN :
978-977-5031-95-2
DOI :
10.1109/NRSC.2008.4542364
