基于有限反馈的机会波束系统  

Opportunistic Beamforming System Based on Finite Feedbacks

作　　者：胡佳伟[1] 侯艳丽[2] 米健[3] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北科技大学信息科学与工程学院,河北石家庄050000 [3]武汉大学电子信息学院,湖北武汉430072

出　　处：《无线电通信技术》2013年第6期82-85,共4页Radio Communications Technology

摘　　要：针对目前机会波束系统中存在反馈量过多的问题,提出一种基于有限反馈的机会波束系统。设置反馈门限,当用户的接收信干噪比大于反馈门限时,对信干噪比进行量化,再将量化电平反馈给基站,否则无需进行量化和反馈。以吞吐量最大化为原则设定最佳反馈门限和量化电平,在瑞利块衰落信道中对系统进行仿真,并与传统机会波束系统比较,结果表明,该系统大大降低了反馈量。In order to solve the problem that there are too many feedbacks in opportunistic beamforming （OBF） system, a new OBF system based on finite feedbacks is proposed. A feedback threshold is set,and the ratio of the receiving signal to interference and noise （SINR） will be quantized and fed back to the base station when SINR is more than the pre-set feedback threshold, otherwise no quantization and feedback are performed. The best feedback threshold and quantized levels are chosen based on maximizing the throughout. The proposed system is simulated in the Rayleigh block-fading channel and compared with the traditional OBF system. The experimental results prove that the proposed system has decreased feedbacks greatly.

关 键 词：机会波束 反馈门限 量化反馈 系统容量 

分 类 号：TN929.5[电子电信—通信与信息系统]