CIF: Small: Collaborative Research: Cooperative Sensing and Communications for Cognitive Radio Networks

摘要：新兴的认知无线电网络（CRN）范式在解决频谱危机方面具有巨大的潜力，它允许未授权用户或次要用户（su）在许可频段内机会主义地和动态地利用空白，而不会对授权用户或主要用户（pu）造成有害干扰。本文研究了crn的两个基本组成部分：频谱感知和频谱接入与共享。更具体地说，pi研究：1)用于协同频谱感知中数据融合的新颖集成信号处理和通信设计；2)新颖的协同频谱共享和通信方案，使pu和su都受益。与现有数据融合规则假设无差错通信信道具有容量限制相比，本研究涉及新颖的集成设计，考虑无线电和融合点之间通信信道的恶化影响，因此对信道错误具有鲁棒性，并提供更高的检测可靠性。采用分布式空时编码和获取分集增益可以进一步提高系统的鲁棒性。基于现代编码，开发了新颖的协作通信方案，使单元能够中继单元。以一种对pu完全无缝的方式进行无速率编码的数据包。该方案对pu和su都是互惠互利的，不同于现有的su在pu期间保持沉默的方案。传播。更广泛的影响包括(1)结合俄勒冈州立大学和科罗拉多大学的研究小组，并通过这种伙伴关系加强研究和教育，(2)对crn的理论和实践产生重大影响，(3)增加代表性不足的学生参与pi ？(4)通过新课程的开发，将研究与教育相结合。

NSF Proposal Number: 0915969PI: VosoughiTitle: CIF: Small: Collaborative Research: Cooperative Sensing and Communications for Cognitive NetworksProject Abstract:The emerging cognitive radio network (CRN) paradigm has a great potential to solve what seems to be a spectrum crisis, by allowing the unlicensed or secondary users (SUs) to opportunistically and dynamically utilize the white spaces within the licensed bands, without causing harmful interference to the licensed or primary users (PUs). This research investigates two essential components of CRNs: spectrum sensing and spectrum access and sharing. More specifically, the PIs study: 1) novel integrated signal processing and communication designs for data fusion in cooperative spectrum sensing, and 2) novel cooperative spectrum sharing and communication schemes that benefit both PUs and SUs.In contrast to the existing data fusion rules that assume error-free communication channels with capacity constraints, this research involves novel integrated designs that consider the deteriorating effects of communication channels between the radios and the fusion point and therefore are robust against channel errors and provide higher detection reliability. The robustness can further be improved by employing distributed space-time coding and harvesting diversity gain. Novel cooperative communication schemes are developed based on modern coding and enable SUs to relay PUs? rateless coded data packets in a fashion that is completely seamless to PUs. The schemes have mutual benefits for both PUs and SUs and differ from the existing ones in which SUs are silent during PUs? transmission. Broader impacts include (1) bonding the research groups from OSU and the UR and enhancing research and education through this partnership, (2) making a significant impact on the theory and practice of CRNs, (3) increasing the participation of under-represented students in PIs? research groups and promoting engineering among high school students, and (4) integrating research and education through development of new courses.