EFFECT OF DIGTAL MODULATION SCHEMES ON QUALITY OF MEDICAL IMAGES

Abstract

Sending/receiving high profile image over noisy channel is a significant research area and considered to be focusing topic by engineers, where high transmission rate of accurate images (medical) is increasingly required. In this paper, many digital communication techniques have been examined, the experiment is performed to offer a viewpoint on the foundation of image processing in digital communication system. Visual Basic Access application is built to diagnose teeth images, in order to perform many processes such as cavity-spot, grey-scale conversion. Matlab simulations have been performed to send/receive the diagnosed image and to evaluate the performance of BPSK and QPSK under AWGN and flat fading channels of SISO (1Tx, 1Rx) system , moreover comparison of (BER,MSE and PSNR) parameters between BPSK and QPSK modulation scheme using different SNR values ( 2dB, 5dB, 7dB, 10dB, 12dB, 20dB and 30dB) is simulated. Modulation techniques BPSK and QPSK have the same results under the same channel, but QPSK modulation is better because of its higher data rate, as it is essential for image processing.