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A New UEP Scheme Based on Adaptive Modulation for Robust Video Transmission in MIMO System

In order to improve the video transmission performance in multiple input multiple output (MIMO) system, an unequal error protection (UEP) transmission scheme based on coded adaptive modulation is proposed in this paper. Specifically, the excess power which is wasted in normal adaptive modulation schemes is utilized to transmit important bits of the video source. Furthermore, a low density parity code (LDPC) is applied to the important bits to provide unequal error protection. Accordingly, the transmission efficiency and quality are both increased. Simulation results have shown that the proposed scheme may achieve great improvement in PSNR comparing to a normal adaptive modulation scheme.