田家强,陈勇,张建照.动态频谱管理中频谱机会发现与授权用户保护的折中优化研究[J].计算机科学,2018,45(3):98-101, 137
动态频谱管理中频谱机会发现与授权用户保护的折中优化研究
Tradeoff Optimization of Spectrum Opportunity Discovery and Licensed User Protection in Dynamic Spectrum Management
投稿时间:2016-12-20  修订日期:2017-02-14
DOI:10.11896/j.issn.1002-137X.2018.03.016
中文关键词:  能量感知,感知时间,感知门限,联合优化,双凸优化
英文关键词:Energy sensing,Sensing duration,Sensing threshold,Joint optimization,Biconvex optimization
基金项目:本文受国家自然科学基金(61301161,61471395),江苏省自然科学基金(BK20141070,20161125)资助
作者单位E-mail
田家强 中国人民解放军理工大学通信工程学院 南京210007
南京电讯技术研究所 南京210007 
491812048@qq.com 
陈勇 南京电讯技术研究所 南京210007 chy63s@126.com 
张建照 南京电讯技术研究所 南京210007  
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中文摘要:
      在基于认知无线电的动态频谱管理中,频谱感知需要发现更多的频谱机会,同时尽量减少对授权用户的干扰。文中研究了能量感知中这两个性能指标的折中优化问题,建立了以两个指标的加权作为优化目标函数、感知时间和感知门限作为优化变量的联合优化模型,并证明了该问题属于双凹优化问题。提出了基于迭代凸优化搜索的优化算法,该算法在不依赖预置感知门限或感知时间的情况下,能够快速获得近似最优解。仿真表明, 相比于单参数优化方法,所提联合优化算法 的性能平均提高了32%和85.9%。
英文摘要:
      In dynamic spectrum management based on cognitive radio,spectrum sensing is desired to explore more spectrum opportunity while incurring less interference to licensed users.This paper investigated the tradeoff optimization of the two performance metrics,and constructed a joint optimization model in which the weighted sum of two metrics is regarded as objective function,and sensing duration and sensing threshold are regarded as variables. This problem is proved to be in the form of biconcave optimization problem (BOP).An optimization algorithm based on alternative convex search was proposed,which can quickly find the near optimal solutions without relying on the predefined sensing parameters.Simulation results demonstrate that the joint parameters optimization scheme generates 32.0% and 85.9% promotion over single parameter optimization schemes on average.
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