SINR-BASED ANTENNA COMBINING FOR MULTIUSER MIMO-OFDM WITH LIMITED FEEDBACK  

作　　者：Lu Min Feng Guangzeng Meng Qingmin 

机构地区：[1]College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

出　　处：《Journal of Electronics(China)》2011年第3期328-333,共6页电子科学学刊（英文版）

基　　金：Supported by the National Post-doctoral Research Funding(No.20090451239)

摘　　要：A multiuser Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) broadcast channel is considered where both transmitter and receivers are equipped with multiple antennas. The Channel State Information (CSI) is quantized and provided through limited feedback links. In the first part of this work, the Maximum Expected SINR Combining (MESC) strategy for feedback decrease is investigated. Then a combination of MESC with subcarrier assigning is presented to further reduce the feedback load. The basic idea is the subcarriers are partitioned into resource blocks. For each block, only one quantized channel vector is feedback. The simulation results show MESC can obtain the performance gain over the relevant combiner strategies in MIMO-OFDM system. Moreover the effectiveness on the reduction of feedback overhead by the use of partitioning blocks in the studied system is evaluated.A multiuser Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing （MIMO-OFDM） broadcast channel is considered where both transmitter and receivers are equipped with multiple antennas. The Channel State Information （CSI） is quantized and provided through limited feedback links. In the first part of this work, the Maximum Expected SINR Combining （MESC） strategy for feedback decrease is investigated. Then a combination of MESC with subcarrier assigning is presented to further reduce the feedback load. The basic idea is the subcarriers are partitioned into resource blocks. For each block, only one quantized channel vector is feedback. The simulation results show MESC can obtain the performance gain over the relevant combiner strategies in MIMO-OFDM system. Moreover the effectiveness on the reduction of feedback overhead by the use of partitioning blocks in the studied system is evaluated.

关 键 词：Multiuser Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) Limited feedback QUANTIZATION 

分 类 号：TN929.5[电子电信—通信与信息系统]