MIMO-OFDM系统的物理层技术及其PHY-MAC跨层设计

PHY-layer principles and PHY-MAC cross-layer design of MIMO-OFDM wireless systems

首先讨论了MIMO-OFDM无线通信系统的物理层技术原理,接着介绍了一种下行MIMO-OFDM系统中基于PHY-MAC跨层设计的保证不同类型(实时与非实时)用户服务质量(QoS)的动态资源分配(DRA)方案。该方案中系统能够根据不同的信道状态以及不同类型的QoS要求在PHY层和MAC层联合动态分配资源,相对传统的分层结构设计更为合理有效。

This paper first introduces the PHY-layer principles of MIMO-OFDM wireless systems.Then it provides a PHY-MAC cross-layer design based on dynamic resource allocation (DRA) scheme with diverse QoS guarantees for heterogeneous users over downlink MIMO-OFDM systems.In such a scheme,the system resources are jointly allocated across PHY and MAC layers based on the channel conditions and the diverse QoS requirements,which will be more effective compared to the conventional layered structure.