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

新兴的认知无线电网络(CRN)范式具有巨大的潜力来解决似乎是频谱危机的问题，允许未经许可的或次级用户(SU)机会和动态地利用许可频段内的空白空间，而不会对许可或主用户(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，PIS研究了：1)用于协作频谱感知中的数据融合的新的集成信号处理和通信设计，以及2)新的协作频谱共享和通信方案，使得PU和SU都受益。与现有的假设容量受限的无差错通信信道的数据融合规则不同，该研究涉及新的集成设计，该设计考虑了无线电和融合点之间的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。通过使用分布式空时编码和收获分集增益，可以进一步提高系统的稳健性。提出了一种新的基于现代编码的协作通信方案，使SU能够转发PUS？以与PU完全无缝的方式无速率编码数据分组。这些方案对PU和SU都是互惠互利的，不同于现有的SU在PUS期间保持沉默的方案？变速箱。更广泛的影响包括(1)将OSU和UR的研究小组联系在一起，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)增加代表不足的学生参与PIs？研究小组和在高中生中推广工程；(4)通过开发新课程来整合研究和教育。

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.