Enabling multiband cognitive relay networks

认知无线电（CR）是解决全球频谱管理机构面临的频谱短缺问题的一项新兴技术。CR旨在提高资源利用效率，增强通信可靠性。这些目标是通过允许cr以机会性方式对许可频段进行二次访问来实现的，从而使许可用户（也称为主用户（PU））不会受到有害干扰。多波段认知无线电（MBCR）具有对一组频段进行检测和分类的固有能力，使其能够利用每一个可用的机会来提高通信可靠性和频谱利用效率。该研究计划将研究同时检测和利用一组空闲频段的创新技术和算法，从而为CR提供额外的自由度（与经典的单波段认知无线电（SBCR）相比）。本计划的主要目标是解决MBCR实现所面临的挑战，并建立一个在合作中继网络上有效设计MBCR的框架。我将在合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其性能进行深入分析。自适应调制也将作为一种增强MBCR中继网络功率和频谱效率的额外强大工具进行探索。

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.