Robust adaptive beamforming for multi-antenna systems

适用于多天线系统的鲁棒自适应波束成形

• 批准号: 341464-2007
• 负责人: Vorobyov, Sergiy
• 金额: $ 1.68万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=458392
• 关键词: Robust; adaptive; beamforming; multi; antenna

In the future-generation cellular mobile radio systems with base stations equipped by multi-antenna transceivers, the use of adaptive beamformers is a key technology for spatially selective signal reception (uplink beamforming) and transmission (downlink beamforming) which has recently emerged and is now an area of intensive research. Using the spatial selectivity of antenna arrays, the receive and transmit beamforming facilitates an increase in system capacity and a decrease in the transmission power. Thus, multi-antenna technology demonstrates the potential to support high data rates while at the same time using less power. However, these can be achieved by possibly increasing the computational complexity of the transmitter and receiver. As a result, multi-antenna technology poses optimization challenges that conventional design techniques cannot resolve directly. Our research within this project aims at resolving such challenges. In designing adaptive beamformers, the robustness issues have to be addressed. Indeed, the conventional adaptive beamforming techniques are developed for idealized signal and channel models. However, various imperfections, which occur in practice, can have deleterious effects on system performance. The main objective of this project is to capture the essential aspects of robust multi-antenna system design. Achieving this objective is expected to contribute, specifically, to defining beyond 3rd generation (B3G) wireless systems by taking into account the robustness issues.

在基站采用多天线收发机的新一代蜂窝移动无线电系统中，自适应波束形成器的使用是空间选择性信号接收(上行波束形成)和发射(下行波束形成)的关键技术，这是最近出现的一个深入研究的领域。利用天线阵列的空间选择性，接收和发射波束形成有助于增加系统容量和降低发射功率。因此，多天线技术展示了在支持高数据速率的同时使用更少功率的潜力。然而，这些可以通过可能增加发送器和接收器的计算复杂性来实现。因此，多天线技术提出了传统设计技术无法直接解决的优化挑战。我们在这个项目中的研究旨在解决这些挑战。在设计自适应波束形成器时，必须解决稳健性问题。事实上，传统的自适应波束形成技术是为理想化的信号和信道模型开发的。然而，实践中出现的各种缺陷可能会对系统性能产生有害影响。这个项目的主要目标是捕捉健壮的多天线系统设计的基本方面。具体地说，实现这一目标将有助于通过考虑健壮性问题来定义Beyond 3g(B3G)无线系统。