摘要
在本篇文章中,我们研究基于MIMO虚拟信道表述的可变速率多用户分集技术.为实现慢衰落相关信道中的多用户分集,本文在发射端采用随机波束成形技术,并提出一种新的利用MIMO虚拟信道来产生随机波束成形矩阵的方法.同时,我们对期望用户的子信道采用自适应编码调制技术,以进一步提高系统性能.
We study the multiuser diversity with constellation selection based on a virtual representation of realistic MIMO correlated channels.To realize multiuser diversity in slow fading correlated channels,We adopt random beamforming technique and propose to construct random beamforming matrix exploiting virtual channel representation.Simultaneously,adaptive coded modulation is applied to each sub-channel of the selected user to improve the system performance further.Two cases are considered:minimizing the BERs in each sub-channel and maximum the sum of data rate.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第4期629-633,共5页
Acta Electronica Sinica
基金
国家自然科学基金(No60272065)
吉林大学创新基金
