Performances of synchronous multiuser detectors for grey-type image transmissions

Abstract

This article presents the results obtained by three multiuser detectors, namely the conventional, the minimum mean square error and the optimal maximum a posteriori one, when grey images are transmitted, as well as the inter-correlation between users and the amplitude imbalance effects on their performances. Three metrics are used to measure and compare the quality of the received images: the bit error rate, the peak signal-to-noise ratio and the mean structural similarity index. Based on the results obtained, we compared the performances achieved by the three detectors and their sensitivity to system imperfections. Several interesting conclusions are highlighted in the final section.

Keywords:

• conventional
• MMSE and optimal MAP multiuser detectors
• bit error rate
• peak signal-to-noise ratio
• mean structural similarity index
• correlation coefficients