Study on sub-block encoder of LDPC code with OFDM for image transmission

Author

Payommai, Tanaporn ; Wiboonjaroen, Wichupong ; Wangkhuntod, Somsin

Author_Institution

Dept. of Electron. Eng., Rajamangala Univ. of Technol. Isan, Nakhonratchasima, Thailand

fYear

2012

fDate

16-18 May 2012

Firstpage

1

Lastpage

4

Abstract

This paper presents low-density parity-check (LDPC) code for image transmission system with any desired code lengths. Parity position of sub-block encoder is easily constructed over Rayleigh fading channel. The code is used as forward error correction (FEC) technique to protect transmitted source data over the channel. The sub-block encoder is designed with OFDM modulation at various noises for two code lengths of 1,057 and 4,376 at high code rate is 0.935. The proposed LDPC code with OFDM modulation can reduce bit error when the code length increases. The performance is evaluated by bit error rate (BER) improvement 80% and peak signal-to-noise ratio (PSNR) more than 30 at SNR equals 8 dB.

Keywords

OFDM modulation; Rayleigh channels; error statistics; forward error correction; image coding; multimedia communication; parity check codes; visual communication; BER improvement; FEC technique; LDPC code; OFDM modulation; Rayleigh fading channel; bit error rate; code length; forward error correction; image transmission system; low density parity check code; peak signal-to-noise ratio; subblock encoder parity position; Equations; Fading; Image communication; Mathematical model; OFDM; PSNR; Parity check codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2012 9th International Conference on

Conference_Location

Phetchaburi

Print_ISBN

978-1-4673-2026-9

Type

conf

DOI

10.1109/ECTICon.2012.6254339

Filename

6254339