Cooperative Multi-Cell Block Diagonalization with Per-Base-Station Power Constraints
Cooperative Multi-Cell Block Diagonalization with Per-Base-Station Power Constraints
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DOI：
10.1109/wcnc.2010.5506527
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发表时间：
2009-10
期刊：
影响因子：
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通讯作者：
Rui Zhang
中科院分区：
文献类型：
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作者：
Rui Zhang
块对角（BD）是一种实际上有利的预编码技术，可以消除插入器的插入器干扰多源多源多输入多输出（MIMO）系统。在本文中，我们将BD应用于合作多电池系统中的下行链路传输，在该系统中，来自不同基站（BSS）的信号将所有移动站（MSS）共同设计，并具有完美的下行链路通道的知识并传播消息。具体而言，本文研究了BD预编码器设计，以最大程度地提高所有MSS的加权总和。相关的优化问题可以在辅助MIMO广播通道（BC）中提出，其一组发射功率约束等效于多电池系统中的不同BS。基于凸优化技术，本文设计了一种有效的算法来解决此问题，并得出相应的最佳BD预言矩阵的结构。此外，对于单人体BSS和MSS的特殊情况，可以证明，提出的解决方案可用于带有多输入单输出（MISO）BC的最佳零效率（ZF-BF）预码器设计每个人的功率约束。
Block diagonalization (BD) is a practically favorable precoding technique that eliminates the interuser interference in downlink multiuser multiple-input multiple-output (MIMO) systems. In this paper, we apply BD to the downlink transmission in a cooperative multi-cell system, where the signals from different base stations (BSs) to all the mobile stations (MSs) are jointly designed with the perfect knowledge of the downlink channels and transmit messages. Specifically, this paper studies the BD precoder design to maximize the weighted sum-rate achievable for all the MSs. The associated optimization problem can be formulated in an auxiliary MIMO broadcast channel (BC) with a set of transmit power constraints equivalent to those for different BSs in the multi-cell system. Based on convex optimization techniques, this paper designs an efficient algorithm to solve this problem, and derives the structure of the corresponding optimal BD precoding matrix. Moreover, for the special case of single-antenna BSs and MSs, it is shown that the proposed solution leads to the optimal zero-forcing beamforming (ZF-BF) precoder design for the multiple-input single-output (MISO) BC with the per-antenna power constraints.