View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by e-Prints Soton SVD-aided Unequal-Protection Spatial Multiplexing for Wireless Video Telephony Du Yang, Nasruminallah, Lie-Liang Yang and Lajos Hanzo School of ECS, University of Southampton, SO17 1BJ, UK Tel: +44-23-8059 3364; Fax: +44-23-8059 4508 E-mail: dy05r,n06r,lly,
[email protected]; http://www-mobile.ecs.soton.ac.uk Abstract—1 The proposed Singular Value Decomposition (SVD) using Trellis Coded Modulation (TCM) for error protection aided Spatial Multiplexing (SM) based Multiple-Input-Multiple- without extending the bandwidth requirements, which was Output (MIMO) system is capable of achieving a high bandwidth also combined with Multi-level Coding (MLC) to provide efficiency. The SVD operation effectively splits the MIMO chan- nel into orthogonal eigen-beams having unequal Bit-error-ratios UEP, for the sake of improving the MEPG-4 video scheme’s (BERs). This property may be exploited for the transmission of performance. speech, audio, video and other multimedia source signals, where In this paper, we propose a novel Singular Value De- the source-coded bits have different error sensitivity. composition (SVD) aided Spatial Multiplexing (SM) based Index Terms—SVD,MIMO,H.264,UEP MIMO transmission scheme for video communications, which decomposes the MIMO channel into orthogonal eigen-beams I. INTRODUCTION exhibiting unequal channel gains characterized by their cor- Video communication over wireless channel has attract responding eigen-values. Consequently, the data transmitted substantial research interest in recent years because of the via the different eigen-beams exhibits a different Bit-error- popularity of diverse video applications, such as for exam- ratio (BER), which provides a novel form of UEP instead ple video-phones, as well as YouTube- and BBC iplayer- of using different-rate FEC schemes.