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OALib Journal期刊
ISSN: 2333-9721
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基于ofdm的认知无线网络资源分配
DOI: 10.13232/j.cnki.jnju.2014.03.014
Keywords: 认知无线电,资源分配,频谱有效,能量有效
Abstract:
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
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