基于OFDM的认知无线网络资源分配

发布时间：2018-04-24 05:41

本文选题：认知无线电 + 资源分配　；参考：《南京大学学报(自然科学)》2014年03期

【摘要】：无线频谱资源的稀缺是限制无线业务持续发展的瓶颈.认知无线电作为一种新兴的技术,改变了传统的授权使用无线电频谱的方式.它通过允许非授权用户伺机接入授权用户的频谱,来提高频谱利用效率,被认为是解决无线频谱资源短缺问题的一种有前途的方法.而正交频分复用技术(OFDM)由于能够自适应调整子载波和功率分配参数,实现动态资源分配,进而成为了认知无线网络中可行的空中接口.本文基于OFDM的认知网络中的资源分配问题,给出了多用户认知网络基本的优化模型,引入了认知无线系统中频谱有效和能量有效的资源分配问题,并通过分析问题的数学结构,设计出快速算法进行求解.
[Abstract]:The scarcity of wireless spectrum resources is the bottleneck restricting the continuous development of wireless services. Cognitive radio, as a new technology, has changed the traditional way of authorizing the use of radio spectrum. It can improve the spectral efficiency by allowing unauthorized users to access the spectrum of authorized users. It is considered to be a promising method to solve the problem of the shortage of wireless spectrum resources. The orthogonal Frequency Division Multiplexing (OFDM) technology can adaptively adjust the subcarrier and power allocation parameters to realize dynamic resource allocation and thus become a feasible air interface in cognitive wireless networks. Based on the problem of resource allocation in cognitive networks based on OFDM, this paper presents the basic optimization model of multi-user cognitive networks, introduces the resource allocation problem of spectrum efficiency and energy efficiency in cognitive wireless systems, and analyzes the mathematical structure of the problem. A fast algorithm is designed to solve the problem.
【作者单位】：南京大学电子科学与工程学院;
【基金】：江苏省自然科学基金(BK2011051)
【分类号】：TN925

【共引文献】