A Hybrid Digital Analog Scheme for MIMO Multimedia Broadcasting

A new scenario for wireless broadcasting is the antenna heterogeneity. In this letter, we propose a new hybrid digital analog design to make the users attain the perceptual quality commensurate with their antenna numbers. A high resolution video is decomposed into a base layer and an enhancement layer. The base layer is transmitted by the conventional digital space time coding scheme. The enhancement layer is transmitted by the pseudo analog and spatial multiplexing that is applied to provide signal quality commensurate with antenna number of users. Compared with the conventional frameworks, the proposed system achieves a notable margin in the peak signal-to-noise ratio and much better performances for receivers with more antennas.