认知无线电中主动探知技术的研究

项目名称： 认知无线电中主动探知技术的研究

项目编号： No.61201130

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： 赵国栋

作者单位： 电子科技大学

项目金额： 25万元

中文摘要： 认知用户与主用户之间无线信道，以及主用户收发机之间无线信道的分布式获取是制约认知无线电进行频谱共享，实现与主用户共存的主要技术瓶颈。本项目拟研究在认知用户与主用户不交换信息的前提下，获取这两类信道信息的主动探知技术。首先从检测角度研究主用户接收机的主动探知技术，给出最优探测信号和检测器的设计方法及性能；然后从估计角度研究认知用户与主用户之间，以及主用户收发机之间信道增益的主动探知技术，设计获取不同估计量的估计器并分析估计误差的下界；最后从应用角度研究主动探知技术在分布式家庭基站中的应用，特别是基于主动探知的分布式干扰管理技术。 本项目研究成果可以使认知用户与主用户进行同时同频同区域共存，将极大扩展认知无线电技术的应用场景。另外，研究成果还可以用于未来移动通信中的多小区分布式协作，通过分布式获取相邻小区信息来提高整个系统的性能。

中文关键词： 认知无线电；频谱共享；主动探知；信道增益估计；干扰管理

英文摘要： In cognitive radio, the channel information between primary and cognitive users and that between primary users is critical for spectrum sharing, which enables the coexistence between the two kinds of users. It is very hard and becomes a bottleneck for cognitive user to obtain those channel information distributedly. To deal with the issue, this proposal intends to investigate a proactive probing technique without the need of communication between primary and cognitive radios. First, primary receiver probing will be studied from the prospective of detection. The optimal probing signal and its detector will be designed, where the corresponding performance will be provided. Second, the channel information between primary and cognitive users and that between primary users will be obtained from the prospective of estimation. Different estimators will be proposed and the low bound of estimation error will be analyzed as well. Finally, the application of proactive probing in femtocells will be developed from the prospective of implementation. In particular, the interference management enhanced by proactive probing will be considered. The results of this proposal will enable the coexistence between primary and cognitive users at the same time, in the same frequency band, and in the same area, which significantly expand

英文关键词： Cognitive Radio；Spectrum sharing；Probing；Channel Gain Estimation；Interference Management