SVD-Aided Unequal-Protection Spatial Multiplexing for Wireless Video Telephony
The proposed Singular Value Decomposition (SVD) aided Spatial Multiplexing (SM) based Multiple-Input-Multiple-Output (MIMO) system is capable of achieving a high bandwidth efficiency. The SVD operation effectively splits the MIMO channel into orthogonal eigen-beams having unequal Bit-Error-Ratios (BERs). This property may be exploited for the transmission of speech, audio, video and other multimedia source signals, where the source-coded bits have different error sensitivity. Video communication over wireless channel has attracted substantial research interest in recent years because of the popularity of diverse video applications, such as for example video-phones, as well as YouTube- and BBC iplayer-style video streaming.