多用户MIMO SDMA系统中的跨层设计

Cross-Layer Design in Multiuser MIMO SDMA Systems

提出了一种联合物理层发送—接收优化和MAC多用户配置的下行多用户MIMO SDMA系统,同时考虑物理层的信道状态信息与MAC层的多路访问控制,实现联合优化.模拟结果表明,通过联合设计物理层和MAC层,不仅能够减少下行多用户SDMA系统中基站所要求的发射天线数,而且可以提高系统的误码性能.

A downlink muhiuser MIMO SDMA system is proposed, which combines Tx-Rx optimization in Physical Layer and muhiuser diversity scheme in MAC Layer. In the proposed system, CSI in Physical Layer and multiple access control in MAC Layer are considered both to achieve joint optimization. Simulation shows that the cross-layer scheme not only decreases the required Tx antenna number in the downlink multiuser SDMA system, but also enhances its performance.