[1]陆彦辉,张帅,穆晓敏,等.基于离散电视频带的频谱接入策略研究[J].郑州大学学报(工学版),2015,36(01):93-96.[doi:10.3969/ j.issn.1671 -6833.2015.01. 022]
　LU Yan-hui,ZHANG Shuai,MU Xiao-min,et al.Dynamic Spectrum Access Strategies in the Cognitive Radio Network Based on the Discrete TV band[J].Journal of Zhengzhou University (Engineering Science),2015,36(01):93-96.[doi:10.3969/ j.issn.1671 -6833.2015.01. 022]
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基于离散电视频带的频谱接入策略研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
36
期数:
2015年01期
页码:
93-96
栏目:
出版日期:
2015-01-10

文章信息/Info

Title:
Dynamic Spectrum Access Strategies in the Cognitive Radio Network Based on the Discrete TV band
作者:
陆彦辉; 张帅; 穆晓敏; 杨守义
郑州大学信息工程学院，河南郑州450001
Author(s):
LU Yan-hui; ZHANG Shuai; MU Xiao-min; YANG Shou-yi
School of Information Engineering ,Zhengzhou University ,Zhengzhou 450001 ,China
关键词:
认知无线电;  Markov 过程; 频谱碎片; 频谱接入策略; 中断概率
Keywords:
cognitive radio; Markov process;  spectrum fragment ;  spectrum access strategy ;  outage probabili-ty
分类号:
TN943
DOI:
10.3969/ j.issn.1671 -6833.2015.01. 022
文献标志码:
A
摘要:
基于电视频带的认知网络中主用户为随机出现的无线麦克等设备,其随机行为使得可用频谱离散化,产生许多小于用户需求的频谱碎片.将主用户行为建模为Markov过程,定义频谱占用度、碎片度及统计平均中断概率来分析其行为对系统性能的影响,并提出两种接入策略,策略一加入调整因子并优先选取较少连续信道,策略二基于k - agile接收机,考虑保护带及灵敏度约束,以最小碎片数为目标，非连续地接入频谱,在物理层解决碎片问题,仿真证明二者性能均优于已有策略.
Abstract:
The unused TV bands are discretized by the behaviors of the random presence of the incumbents,considered as primary users in the cognitive radio network. The spectrum discreteness is ignored by most of theexisting strategies,resulting in a mass of spectrum fragments that cannot afford the user’s demand. In the pa-per,the primary users are modeled as a Markov process,and the spectrum occupancy degree,fragments de-gree and the statistical average outage probability are defined to analyze the impact of the primary users on sys-tem performance. And two strategies are proposed in this paper. The first strategy involves adjustment factorand selects the fewer continuous channels. The second strategy based on the k-agile receiver involves the con-straint of agility and guard bands,and selects the minimum non-contiguous fragments to solve the fragmentsproblem in the physical layer. The simulations show that both strategies are superior to the existing strategies.

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