Enabling multiband cognitive relay networks

认知无线电(CR)是一种能够解决频谱紧缺问题的新兴技术，面临着全球频谱管理机构的挑战。CR的目的是提高资源利用效率，同时增强通信可靠性。这些目标是通过允许CRS以机会主义方式对许可频段进行二次接入来实现的，从而使得许可用户(也称为主用户(PU))不会受到有害干扰。多频段认知无线电(MBCR)具有对一组频谱进行检测和分类的能力，使认知无线电能够利用一切可能的机会来增强通信可靠性，同时提高频谱利用效率。这项研究计划将研究同时检测和利用一组空闲频谱的创新技术和算法，从而为认知无线电提供额外的自由度(与经典的单频认知无线电(SBCR)相比)。该计划的主要目标是解决实现MBCR所面临的挑战，并建立一个在协作中继网络上高效设计MBCR的框架。我将在协作中继网络的背景下研究新的MBCR方案，并通过分析和仿真对它们的性能进行深入的分析。此外，还将探讨自适应调制作为提高MBCR中继网功率和频谱效率的另一种有力工具。 我的研究计划将有助于为CR系统开发技术和工具的全球努力。该计划的成果将包括新的算法和技术，并将包括专利和出版物。除了5名无线通信领域的本科生外，我还将培养3名博士生和3名硕士研究生。信息技术和电信部门对这些HQP的需求很大，他们未来的就业将加快向加拿大工业传播下一代通信技术，并加强加拿大在这些部门的领导作用。

Cognitive Radio (CR) is an emerging technology capable of solving spectrum scarcity that faces spectrum regulation agencies worldwide. CR aims at improving resource utilization efficiency as well as enhancing the communication reliability. These goals are achieved through allowing secondary access by CRs to licensed spectrum bands in an opportunistic manner such that licensed users (also known as Primary Users (PU)) experience no harmful interference. Multiband cognitive radio (MBCR) has the inherent capabilities of detecting and classifying a group of spectrum bands, allowing the CR to exploit every available chance to enhance communication reliability as well as improving the spectrum utilization efficiency. This research program will investigate innovative techniques and algorithms for simultaneous detection and utilization of a group of idle spectrum bands, hence providing the CR with additional degrees of freedom (compared to the classical Single Band Cognitive Radio (SBCR)). The main goal of this program is to address the challenges facing the realization of MBCR and establish a framework for efficient design of MBCR over cooperative relay networks. I will investigate new MBCR schemes in the context of cooperative relay networks and provide an in-depth analysis for their performance both analytically and by simulation. Adaptive modulation will also be explored as an additional powerful tool for enhancing power and spectral efficiency in MBCR relay networks. My research program will contribute to the global effort of developing techniques and tools for CR systems. The outcomes of this program will consist of novel algorithms and techniques and will include patents and publications. I will train 3 PhD and 3 MSc students in addition to 5 undergraduate students in the area of wireless communications. There is a strong demand for these HQP in the information technology and telecommunications sectors and their future employment will accelerate disseminating next-generation communications technology to Canadian industry and enhance Canada's leadership role in these sectors.