Adaptive antenna systems for communications in interference environments

无线通信价值很高，增长迅速，正在为每个国家创造社会效益和经济效益。它既激励并依赖于许多科学学科。在加拿大，大量新的经济机会可以来自高质量的、对未来系统的本土研究开发的新知识。这项提议是为了在精心选择的无线通信方面贡献创新的、相关的科学。 研究的重点是无线性能最严重的限制--来自其他用户的无线电波干扰。干扰控制蜂窝部署。它特别影响未经许可的频段，在这些频段中，机器对机器的通信是增长最快的无线部门。但在这里，由于干扰，链路不可靠。自适应天线是唯一一种可以在时间和空间上同时重用频谱的技术，从而提高了频谱效率和链路可靠性。 一种自适应天线系统，包括通过自适应算法对其信号进行加权和组合的几个天线单元。在面对不断变化的干扰、终端位置和传播条件时，它可以优化性能。所需研究包括：电磁传播；天线和阵列设计和评估；以及通信信号处理，包括自适应技术。 研究的影响来自于低成本、高容量的可靠链路的大规模机会。部署这样的系统将是一个突破。这还没有发生，因为在物理过程、天线和通信处理中需要新的知识，特别是它们之间的相互作用。这项研究将对这一知识做出贡献。它的影响还将改善其他无线应用，如定位和成像，并导致新的天线和信号处理产品。

Wireless communications is high-value, growing quickly, and is creating social and economic benefits in every country. It both motivates and relies on many disciplines of science. In Canada, massive new economic opportunities can flow from new knowledge developed by quality, indigenous research of future systems. This proposal is to contribute innovative, relevant science in carefully chosen aspects of wireless communications. The research focus is motivated by the most severe limitation of wireless performance - radiowave interference from other users. Interference governs cellular deployments. It particularly affects the unlicenced bands, in which machine-to-machine communication is the fastest growing wireless sector. But here the links are unreliable because of interference. An adaptive antenna is the only technology that can reuse the spectrum simultaneously in time and space, thereby improving both the spectral efficiency and the link reliability. An adaptive antenna system comprises several antenna elements whose signals are weighted and combined through an adaptive algorithm. It optimizes performance in the face of changing interference, terminal positions, and propagation conditions. The required research draws from: electromagnetic propagation; antenna and array design and evaluation; and communications signal processing, including adaptive techniques. The impact of the research stems from the large-scale opportunities for low cost, high capacity links which are reliable. Deployment of such systems would be a breakthrough. This has not happened because new knowledge is required in physical processes, antennas, and communications processing; and especially the interactions among these. This research will contribute to that knowledge. Its impact will also improve other wireless applications, such as localization and imaging, and lead to new antennas and signal processing products.