基于投影动态系统理论的认知无线网络实时功率分配问题研究

项目名称： 基于投影动态系统理论的认知无线网络实时功率分配问题研究

项目编号： No.61501202

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 梁辉

作者单位： 吉林大学

项目金额： 19万元

中文摘要： 功率分配问题是认知无线网络能够稳定、高效运行的关键技术之一。由于认知网络具有网络结构异构，系统资源变化快速的特点，使得以往基于静态考虑的传统功率分配方法不再有效，亟需找到一类新的适于该动态特点且能够实时控制的功率分配方法。本课题针对该实际需求从投影动态系统这一新的视角对认知网络的功率分配问题展开研究，主要工作为：(1)由经典优化模型出发，通过变分不等式、常微分方程的等价转化建立相应的动态系统模型；(2)在(1)的基础上，通过引入不同的控制变量对功率进行实时控制，使系统能够满足不同用户需求的同时达到稳定的工作状态；(3)当系统存在外界干扰时，针对不同类型的干扰利用鲁棒控制等理论进行算法设计以提高系统抵抗干扰的能力。最后，通过本课题的研究，拟建立一套基于动态方程且分配结果是以时间作为变量的新型功率分配算法体系，为解决认知无线网络最优功率分配问题发掘新的方法，进而为该技术的实际应用提供理论依据。

中文关键词： 认知无线网络；功率分配；投影动态系统；稳定性理论；鲁棒控制

英文摘要： Power allocation is one of the key technologies for cognitive wireless network can be stable and efficient operation. Due to cognitive network has heterogeneous network structure, rapid changes in system resources make the traditional power allocation method which based on static concern has no longer valid, seriously need to find a new type of algorithms to fit this dynamic feature as well as control the power in real time. According to this actual needs, our research develop the work from a new dynamic system perspective, the main contributions are as followed: (1)Starting from the classical optimization model, establish the corresponding dynamic system model by variational inequality and ordinary differential equation equivalent transformation; (2) Based on (1), to control power in a real-time way by introducing different control variables, enabling the system satisfy the requires of different users at the same time working in a relatively stable state; (3)When there is an external disturbance, utilize like robust control etc. methods to design algorithm against different type of disturbance to improve the ability of system to resist interference. Finally, through this research, aim to establish a set of new power allocation algorithms which based on dynamic equation and make time as the variable of allocation results, explore new methods for resolving optimal power allocation issue in cognitive wireless network; furthermore, provide the theoretical basis for the practical application of this technology.

英文关键词： cognitive wireless network;power allocation;projected dynamic system;stability theory;robust control