认知无线电中基于频谱聚合的需求改进型频谱分配算法

发布时间：2018-01-06 16:32

本文关键词：认知无线电中基于频谱聚合的需求改进型频谱分配算法　出处：《重庆邮电大学学报(自然科学版)》2014年01期 　论文类型：期刊论文

【摘要】：在认知无线电中,合理的频谱分配算法是提高频谱利用率的关键。针对现有频谱分配算法对不连续频谱的利用率较低的问题,提出一种基于频谱聚合的需求改进型频谱分配算法。该算法建立在图论着色模型的基础上,综合考虑了认知用户可用频谱的多样性、不连续频谱的可聚合性以及频谱聚合的最大范围限制等因素,并联合频谱聚合技术与用户的当前需求信息进行设计。算法提出了3种不同的标注准则,通过仿真对比了不同准则下的系统效益。结果证明,所提算法在频谱紧张、用户需求较大的认知环境下,不仅有较好的系统分配率和吞吐量,也能兼顾到认知用户间的公平性。
[Abstract]:In the cognitive radio spectrum allocation algorithm, reasonable is the key to improve the spectrum utilization. The use of existing spectrum allocation algorithm for continuous spectrum of the low efficiency problem, we put forward an improved spectrum allocation algorithm based on spectrum aggregation requirements. The algorithm based on graph coloring model, considering the diversity the cognitive users of the available spectrum, polymerizable maximum range limitation and spectrum aggregation factors such as discontinuous spectrum, design the demand information and joint spectrum aggregation technology with the user. The algorithm presents 3 different annotation guidelines, comparing the benefit of the system under different criteria. The results show that the the proposed algorithm in the spectrum tense, users demand greater cognitive environment, not only the system distribution rate and good throughput, can also take into account the fairness among cognitive users.

【作者单位】：重庆邮电大学软件技术中心;
【基金】：国家自然科学基金(61271259) 重庆市自然科学基金(CTSC2011jjA40006,CTSC2010BB2415) 重庆市教委科学技术研究项目(KJ120501,KJ120502,KJ110530)~~
【分类号】：TN925
【正文快照】： 0引言随着通信技术和业务的不断增多,频谱资源成为了公认的稀有资源,能够有效提升频谱利用率的认知无线电(cognitive radio,CR)[1]技术受到了极大的关注。它允许认知用户(cognitive user,CU)利用感知到的“频谱空穴”进行通信,实现与授权用户(primary user,PU)的频谱资源共享

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