IMAGE TRANSMISSION IN OFDM USING M-ARY PSK MODULATION SCHEMES –A COMPARITIVE STUDY

N.Praba, K.M.Ravikumar

Abstract: Image transmission in OFDM could be done using various modulation techniques. Digital images are prone to a wide variety of noises. The various noises are salt and pepper noise, Gaussian noise, speckle noise. The performance of the OFDM system for digital image transmission using four different modulation techniques namely BPSK,QPSK,16-PSK and 256-PSK are analyzed. The image is corrupted by additive white Gaussian noise(AWGN) which is added in the communication channel. The results show that OFDM systems with BPSK modulation or QPSK modulation performs well for image transmission under noisy channels and with SNR = 12dB compared to OFDM systems with 16-PSK or 256-PSK modulation. The simulation is done in MATLAB

Keywords: Orthogonal frequency division multiplexing(OFDM), Bit Error Rate (BER),Phase shift keying(PSK), additive white Gaussian noise (AWGN).Inter-symbol interference(ISI)

DOI: https://doi.org/10.15623/ijret.2016.0501039