Multi Carrier Code Division Multiple Access (MC-CDMA)

This book focuses on Image Transmission
through MC-CDMA Channel in low SNR environment. The whole
MC-CDMA system is composed of 5 main components which are
the compressor, transmitter model, channel model, receiver
model and decompressor. The system involves multi-user image
transmission. The original image with PPM or PGM file
extension is compressed by using JPEG2000 standards (Wavelet
Image Compression). The compressed image is inserted into
the digital system and the image data is transmitted through
the system. The multi-user image data are received in the
output of the receiver. Then this image goes to the
decompressor. The multi-user image data are decompressed
into an image with PPM or PGM file extension. The
reconstructed image for JPEG2000 is compared with the
original image by using PSNR and RMSE. The difference
between the quality of the original image and the
reconstructed image is observed.To examine the quality of
the reconstructed images at low SNR MC-CDMA channel, the
channel's SNR is varied from 10,8,6,5, and finally to 4.At
each SNR value, two test images were transmitted and its
reconstructed image were compared with original image by
using PSNR and RMSE.