自适应多天线OFDMA蜂窝系统中反馈压缩新方法

Compression of Feedback in Adaptive Multi-antenna OFDMA Cellular Systems

在自适应调制和调度的无线通信系统,特别是OFDMA系统中,反馈信息压缩技术已成为研究热点。文中研究了随机波束成形OFDMA系统中分簇反馈压缩技术以及门限信噪比压缩技术,结合二者的优点提出了一种改进方案——分簇门限信噪比压缩技术。仿真证明,采用分簇门限信噪比技术与分簇技术、门限信噪比技术相比,明显降低了反馈量,且在用户较多时系统容量损失很少。

For wireless systems with adaptive modulation and scheduling, especially for OFDMA systems, it＇s a hotspot to find efficient feedback compression techniques. In this paper, we put forward an improved scheme based on the clustered and threshold SNR compression feedback scheme. Simulation results show that the improved schemes can reduce the feedback amount greatly compared with clustered and threshold SNR scheme, with little capacity loss in the case of an appropriate number of users.