Transmission and Reception of Grey Scale Image Through Rayleigh Channel Using Concatenated STBC and Different Channel Codes

This paper presents transmission and reception of grey scale image through Rayleigh fading channel. Grey scale image is made up of pixel values. These pixel values are represented by decimal values. For transmission these pixel values are obtained using MATLAB and converted into binary bits. Grey Scale image is transmitted through different systems. Firstly it is transmitted through Alamouti Space Time Block Codes (STBC) system, and then it is transmitted through Concatenated Alamouti STBC with Convolution codes, then through Concatenated Alamouti STBC with Hamming codes and through Concatenated Alamouti STBC with ReedSolomon codes using BPSK modulation. Comparison has been done on the basis of quality of reproduced image in terms of image performance metrics i.e. Quality index (Q-Index) and PSNR (Peak Signal to Noise Ratio) for the different values of SNR for above mentioned Systems. BER (Bit Error Rate) analysis has been done for one transmitter and one receiver, two transmitters and two receivers, two transmitters and two receiver concatenated with different channel codes. The results are presented by plots between BER Vs SNR using Monte Carlo Simulation. It has been observed that in terms of BER performance analysis of proposed system provides better results for Concatenated RS channel codes with STBC than other proposed concatenated channel codes with STBC. In terms of image performance metrics PSNR and Q-Index, simulations results show that the quality of reconstructed image significantly improved for concatenated Reed-Solomon channel codes with STBC. Keywords— Alamouti STBC, Channel Codes, PSNR and