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

新兴的认知无线电网络（CRN）范例具有很大的潜力来解决似乎是频谱危机的问题，其通过允许未授权或次级用户（SU）机会主义地和动态地利用授权频带内的白色空间，而不会对授权或初级用户（PU）造成有害干扰。本研究探讨了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）用于协作频谱感知中的数据融合的新颖的集成信号处理和通信设计，以及2）使PU和SU都受益的新颖的协作频谱共享和通信方案。与假设具有容量约束的无差错通信信道的现有数据融合规则相比，该研究涉及新颖的集成设计，该设计考虑了无线电设备和融合点之间的通信信道的恶化影响，因此对信道误差是鲁棒的，并提供更高的检测可靠性。采用分布式空时编码和分集增益可以进一步提高系统的鲁棒性。新的合作通信方案的基础上开发的现代编码和使SU中继PU？以与PU完全无缝的方式无速率编码数据分组。该计划有互惠互利的PU和SU，并不同于现有的SU是沉默的PU？传输更广泛的影响包括：（1）将俄勒冈州立大学和俄勒冈大学的研究小组联系起来，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在PI中的参与？研究小组和促进高中学生的工程;（4）通过开发新课程，将研究与教育结合起来。

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.