A Time Slicing Technique for Mobile Multimedia Communications using MSE-OFDM System

A new multicarrier system, termed multi-symbol encapsulated orthogonal frequency division multiplexing (MSE-OFDM), was proposed earlier, in which one cyclic prefix (CP) is used for multiple OFDM symbols. The motivation of MSE-OFDM is to address the disadvantages of OFDM system, i.e., the sensitivity to carrier frequency offset and high peak to average power ratio at the same time. In this paper, we propose a new time slicing technique by replacing the cyclic prefix with preceded pseudo random sequence for MSE-OFDM system. With the proposed time slicing technique, multiple multimedia data streams with dynamic data rates can be easily multiplexed. In addition, this system overcomes the high sensitivity to frequency offset inherited with OFDMA system and can be used for both uplink and downlink for mobile multimedia communications with variable data rates. The proposed time slicing system also enables the power saving for mobile receivers, through which the batter life can be substantially extended.