Transmission Mechanism and Performance Analysis of Multiuser Opportunistic Beamforming in Rayleigh and Rician Fading Channels

被引：11
|
作者：
Sun, Wenbin [1 ]
Yu, Qiyue [1 ]
Meng, Weixiao [1 ]
Leung, Victor C. M. [2 ]
机构：
[1] Harbin Inst Technol, Commun Res Ctr, Harbin 150001, Heilongjiang, Peoples R China
[2] Univ British Columbia, Elect & Comp Engn Dept, Vancouver, BC V6T 1Z4, Canada
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2018年 / 67卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Multiuser diversity; opportunistic beamforming; ergodic capacity; upper and lower bounds of BER; MIMO SYSTEMS; LIMITED FEEDBACK;
D O I：
10.1109/TVT.2018.2856100
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper investigates the performances of multiuser downlink opportunistic beamforming (OBF) systems in both Rayleigh and Rician fading channels with the limited feedback information. The statistical characteristics of the equivalent channels show how OBF affects the channel gain. The optimal OBF weight is derived to achieve the maximum capacity. Moreover, the relationship between the capacity and feedback information is analyzed in details. In order to meet different quality of service requirements, we propose two transmission mechanisms that are, respectively, based on maximum-capacity and fairness criterions. Since the closed-form expression of the bit error ratio (BER) is hard to obtain, the upper and lower bounds of BER are derived to approximate the theoretical values. Finally, numerical results are presented to validate our analysis and provide further insights.
引用
收藏
页码：9459 / 9473
页数：15
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