Joint Beamforming and Power Allocation for MIMO Relay Broadcast Channel With Individual SINR Constraints
Joint Beamforming and Power Allocation for MIMO Relay Broadcast Channel With Individual SINR Constraints
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DOI：
10.1109/tvt.2013.2285164
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发表时间：
2011-02
影响因子：
6.8
通讯作者：
Chun-Che Chien;Hsuan-Jung Su;Hsueh-Jyh Li
中科院分区：
文献类型：
--
作者：
Chun-Che Chien;Hsuan-Jung Su;Hsueh-Jyh Li
在本文中，系统设计的多输入多输出（MIMO）中继广播信道与个别信号干扰噪声比（SINR）的限制，在移动的站（MS）被认为是。通过研究基站和中继站的下行-上行对偶结构，提出了两种基站和中继站联合功率分配和波束赋形设计方案。首先考虑在BS和RS处具有给定SINR目标的实际功率约束下可行解的存在性问题。然后，考虑了和功率最小化问题。在凸优化的框架下，利用最优联合功率分配和波束形成可以有效地解决每个设计问题。我们还表明，与子信道配对在RS，传输功率可以进一步降低。最后，概括的多跳的情况下，提供进一步提高功率效率。
In this paper, system design for a multiple-input-multiple-output (MIMO) relay broadcast channel with individual signal-to-interference-plus-noise ratio (SINR) constraints at mobile stations (MSs) is considered. By exploring the structure of downlink-uplink duality at either the base station (BS) or the relay station (RS), we propose two schemes of joint power allocation and beamforming design at the BS and the RS. The problem of the existence of feasible solutions under practical power constraints at the BS and the RS with given SINR targets is considered first. Then, the problem of sum power minimization is considered. Each design problem can be efficiently solved using optimal joint power allocation and beamforming under the framework of convex optimization. We also show that with subchannel pairing at the RS, the transmission power can be further reduced. Finally, a generalization to the multihop scenario is provided to further improve power efficiency.