Resource allocation for multiuser STBC-BF MIMO-OFDM downlink with imperfect channel information  

作　　者：Zhang Chengwen Liao Minghong Zhang Zhongzhao Meng Weixiao 

机构地区：[1]Communication Research Center, Harbin Inst. of Technology, Harbin 150080, P. R. China [2]School of Computer Science and Technology, Harbin Inst. of Technology, Harbin 150001, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2009年第4期687-693,共7页系统工程与电子技术（英文版）

基　　金：supported partly by the Postdoctoral Science Foundation of China;the National Natural Science Foundation of China(60572039).

摘　　要：To improve the performance of a multiuser MIMO-OFDM system with imperfect channel status information, a downlink adaptive resource allocation algorithm which combines space-time block coding and beam forming （STBC-BF） is proposed. The algorithm allocates the subcarriers with a shared manner. A zero forcing processing with joint Rx-Tx is used to suppress the co-channel interference （CCI） and to construct uncorrelated channels for STBC. An adaptive power allocation for the STBC equivalent channels can increase signal to interference and noise ratio at the receiver. Simulation results show that under the condition of an imperfect CSI, the proposed algorithm improves the system performance and reduces the number of BS transmit antennas required.To improve the performance of a multiuser MIMO-OFDM system with imperfect channel status information, a downlink adaptive resource allocation algorithm which combines space-time block coding and beam forming （STBC-BF） is proposed. The algorithm allocates the subcarriers with a shared manner. A zero forcing processing with joint Rx-Tx is used to suppress the co-channel interference （CCI） and to construct uncorrelated channels for STBC. An adaptive power allocation for the STBC equivalent channels can increase signal to interference and noise ratio at the receiver. Simulation results show that under the condition of an imperfect CSI, the proposed algorithm improves the system performance and reduces the number of BS transmit antennas required.

关 键 词：resource allocation MIMO-OFDM MULTIUSER STBC-BF CCI suppression 

分 类 号：TN911.7[电子电信—通信与信息系统]