A novel UEP scheme for scalable video transmission over MIMO systems

Abstract

In this paper, we propose a novel unequal error protection (UEP) scheme to improve the system performances for scalable video transmission over MIMO wireless networks, in which antenna selection, modulation, and channel coding are jointly optimized. We formulate the proposed scheme as an optimization problem and an efficient heuristic algorithm is proposed to solve it. By analyzing the dependency among antenna selection, modulation and channel coding, we determine the three vectors sequentially that antenna selection is heuristically implemented according to the order of subchannel's SNR strength, the best modulation levels are selected by maximizing the good throughput, and based on the optimal antenna selection and modulation level vectors, the channel coding rate vector is determined to lower the packet error ratio (PER) as much as possible under bandwidth constraint. Experimental results show that the proposed algorithm achieves nearly the same optimal PSNR performance based on exhaustive search. By comparing with other transmission schemes, our proposed scheme and algorithm significantly improve the system performance.