Mimo-ofdm for Arbitrary Multiplexing Rates Based Ondynamic Sub Carrier Mapping

Multiple-input multiple-output (MIMO) wireless technology in combination with the orthogonal frequencydivision multiplexing (MIMO-OFDM) is an attractive air interface solution for next-generation wireless local area networks (WLANs). Among the various resources in MIMO multicarrier systems the multiplexing rate assignment is related to the rate of transmissions. Here we proposed a new hybrid cyclic delay diversity (HCDD) scheme for multiple inputs multiple output (MIMO)-orthogonal frequency division multiplexing (OFDM) systems. Here we can achieve non integer multiplexing rate by assigning sub carriers and we can also select required number of transmitting antennas and adjusting diversity and multiplexing gains to matching various user requirements. In order to bridging the multiplexing rate with diversity gain here we propose dynamic sub carrier mapping for subcarrier allocation for multiplexing rate achievements. The advantage of proposed system is presented in the applications of scalable video broadcasting (SVB). Keywords—MIMO-OFDM,DSTTD,CDD,SCDD,diversity multiplexing-tradeoff.