Wireless image transmission based on adaptive OFDM system

Author

Chu, Hyung Suk ; Park, Byung Su ; An, Chong Koo ; Kang, Jung Sun ; Son, Hui-Geun

Author_Institution

Sch. of Electr. Eng., Univ. of Ulsan, Ulsan

fYear

2007

fDate

3-6 Oct. 2007

Firstpage

623

Lastpage

626

Abstract

This paper presents the image transmission system, that consists of the wavelet based image compression algorithm and the adaptive OFDM system. The wavelet based image compression algorithm searches the position information of the significant coefficients by the quad-tree information and computes the magnitude information using the EZW method. The adaptive OFDM system allocates the modulation bit of each subcarrier according to the channel condition by using the channel estimation algorithm. The proposed image transmission system progressively transmits the input image according to the compression bit rate and improves, up to 8 dB, the PSNR performance of the adaptive modulation in comparison with that of the fixed modulation (16QAM).

Keywords

OFDM modulation; adaptive modulation; channel estimation; data compression; image coding; quadtrees; visual communication; wavelet transforms; EZW method; adaptive OFDM system; adaptive modulation; channel condition; channel estimation algorithm; compression bit rate; fixed modulation; image transmission system; modulation bit; position information; quad-tree information; wavelet based image compression algorithm; wireless image transmission; Adaptive systems; Bit rate; Channel estimation; Digital audio broadcasting; Discrete wavelet transforms; Image coding; Image communication; Image reconstruction; OFDM modulation; PSNR; Adaptive OFDM; Image transmission systeln; Wavelet transform;

fLanguage

English

Publisher

ieee

Conference_Titel

Strategic Technology, 2007. IFOST 2007. International Forum on

Conference_Location

Ulaanbaatar

Print_ISBN

978-1-4244-3589-0

Electronic_ISBN

978-1-4244-1831-2

Type

conf

DOI

10.1109/IFOST.2007.4798676

Filename

4798676