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认知无线电(CR)是一种智能无线通信技术,通过从空间和时间上充分利用空闲的频谱资源,以提高频谱利用率。为解决基于OFDM的认知无线电系统中子载波及其功率分配方案中不公平和运算复杂的问题,利用认知无线电的基本思想,提出了将子载波分配和功率分配分为2个相继步骤的一种行之有效的方案。通过构建相应的系统模型及其仿真实验,验证了提出方法的优越性,既可以接近贪婪算法的系统容量,又能提高频谱分配的公平性和降低系统运算开销。
Abstract：Cognitive radio is a kind of smart radio communication technology,which makes full use of the idle spectrum resource in terms of the dimensions of space and time to improve the spectrum utilization ratio.In order to solve this problem that the scheme of sub-carriers and their power distribution is unfair and the operation is complex,this paper proposes a feasible plan that the distribution of sub-carriers and their power allocation can be processed as the two steps in succession based on the basic idea of cognitive radio.By constructing the corresponding system model and performing the related simulation experiments,it is verified that the proposed scheme is of availability,which not only approaches to the system capacity of greedy,but also enhances the fairness of spectrum allocation as well as lower the cost of system operation.
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基本信息:
DOI：
中图分类号:TN925
引用信息:
[1]韩春耀,吴利民.基于二维空间的认知网络频谱分配方案[J].无线电通信技术,2013,39(04):7-10+24.
基金信息: