基于协同的频谱认知蜂窝网络的系统容量研究

项目名称： 基于协同的频谱认知蜂窝网络的系统容量研究

项目编号： No.61201195

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 洪学敏

作者单位： 厦门大学

项目金额： 27万元

中文摘要： 频谱认知蜂窝网络通过认知无线电(CR)技术捕获并利用蜂窝网频带外的闲置频谱资源，能够从根本上提高网络的容量和能效，代表了移动通信网络的一个主要演进方向。基于协同的频谱认知蜂窝网络利用频谱资源的互补特性来优化协作通信的物理层传输，比起非协同的网络具有诸多优势。为了深入了解协同频谱认知蜂窝网络的性能极限，本项目从信息论的角度对其网络容量展开深入的研究。首先，在主要用户接受到的平均干扰功率受限、峰值干扰功率受限、和干扰溢出概率受限这三种情况下，对CR技术所能捕获的频谱资源做出量化的分析。在此过程中探索更精确的描述网络空间分布特性的模型，如Geyer模型的使用。其次，在量化频谱资源的基础上，逐步分析固定中继与虚拟天线阵列这两种协作方案下的频谱认知蜂窝网络的链路容量、小区容量、以及系统容量。预期研究成果能够揭示协同频谱认知蜂窝网络的容量属性,为下一代移动通信网络的演进和优化提供理论基础。

中文关键词： 蜂窝网；认知无线电；容量；频谱效率；能量效率

英文摘要： Spectrum-aware cognitive cellular network (SCCN) uses cognitive radio (CR) technology to capture and exploit the underutilized spectrum outside the licensed cellular band. Due to its capability to improve the capacity and energy efficiency of the network, SCCN represents one of the future trends for the evolution of mobile communication systems. Cooperative SCCN (CSCCN) shows many advantages compared with non-cooperative ones by exploiting the complementary characteristics of the spectrum resources to enhance the performance of cooperative-communication based physical layer. To better understand the fundamental performance limits of CSCCN, this proposal aims to study the link level and system level capacities of CSCCN from an information-theoretic perspective. First, taking into account various interference constraints, the spectrum resource available to CR networks is evaluated quantitively. The interference constraints are imposed upon primary receivers and include average interference power constraint, peak interference power constraint, and interference outage constraint. Accurate spatial point process models such as the Geyer Saturation model are used to describe the spatial characteristics of the network. Second, given the spectrum resources, the link-level capacity, cell aggregate capacity, and system cap

英文关键词： cellular network；cognitive radio；capacity；spectrum efficiency；energy efficiency