认知无线电系统的最优帧长设计  

Optimal Frame Duration for Cognitive Radio System

作　　者：胡志刚[1] 汤海冰[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《湖南大学学报（自然科学版）》2013年第1期98-102,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(61272148)

摘　　要：建立了当贝叶斯风险一定时,发送时间与干扰之间关系的模型.在此基础上,提出了2种满足干扰约束的算法,单用户感知模式下最大化系统吞吐量时的帧长设计算法和多用户合作感知模式下基于纽曼-皮尔逊准则的帧长设计算法.仿真结果表明,同已有算法相比,由于帧长的优化,即使贝叶斯风险较大,新算法也能取得相对较优的吞吐量.This paper first derived the function between the transmission time and the interference for given Bayesian risk value. On this basis, the following two interference constraint algorithms were proposed, i. e. , the non- cooperative sensing mode frame length design algorithm to maximize system throughput and the cooperative sensing mode frame length design algorithm based on Newman-Pearson criterion. Simulations results have shown that, even if the Bayesian risk value is large, the proposed algorithm can achieved better throughput due to the optimization of the frame length, compared with the existing schemes.

关 键 词：认知无线电 帧长 频谱感知 感知时间 

分 类 号：TN92[电子电信—通信与信息系统]