项目名称: 认知无线网络中分布式波束成形技术的研究
项目编号: No.61271178
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 无线电电子学、电信技术
项目作者: 郭莉
作者单位: 北京邮电大学
项目金额: 66万元
中文摘要: 认知无线电以自适应频谱分配方式改进现有的频谱管理模式。波束成形是空分多址的一种有效实现技术。本申请拟研究认知无线网络中的分布式波束成形技术。包括:根据信息论原理,基于完整信道状态信息和部分信道状态信息,对系统认知用户的和容量进行理论分析,推导容量界和认知增益;研究不同优化目标、不同限制条件下的分布式波束成形优化问题,设计复杂度低、鲁棒性好的波束成形算法,提出分布式波束成形优化方案,形成一套自适应的优化体系;设计分布式波束成形中的载波同步方案和算法;研究分布式波束成形信息反馈机制,设计反馈时延控制机制和信息有效性保障机制。从而解决一直以来阻碍分布式波束成形算法在传统移动通信网络和认知无线网络中真正应用的若干关键问题;实现在认知无线网络中,认知用户与主用户共享频谱资源的通信目标。并在充分保证主用户通信质量的同时,考虑认知用户的用户体验,回归通信质量保障的真正目的。
中文关键词: MIMO理论与技术;分布式波束成形;认知无线电;载波同步;物理层安全
英文摘要: Cognitive Radio can take full advantage of the authorized spectrum using the adaptive spectrum allocation method to improve the existing spectrum management.Beamforming is an effective way of SDMA.The corresponding weighted transmit signals of different users reduce the interference between users and thus increase the system capacity. This application intends to study the distributed beamforming under the cognitive radio system, including: 1)According to the information theory, based on the conditions of perfect channel state information and partial channel state information, we will focus on the theoretical analysis of the cognitive system capacity to derive the capacity boundary and cognitive gain. 2)We will also study the distributed beamforming optimization problem under different optimization objectives and different constraints, design beamforming algorithms with low complexity and high robustness. We will propose the distributed beamforming schemes with optimized performance, construct the adaptive optimazation system. 3)Design the carrier synchronization schemes and algorithms under distributed beamforming system, study the feedback mechanism to achieve the feedback information compression algorithm and design the feedback delay control and effective infromation provisioning mechanisms. Consequently, s
英文关键词: MIMO theory and technology;distributed beamforming;cognitive radio;carrier synchronization;physical layer security