非理想信道检测的认知无线电网络中能量感知频谱接入(英文)

被引：2

作者：

魏翼飞 ^{[1
]}

都晨辉 ^{[1
]}

冯瑞军 ^{[2
]}

F Richard Yu ^{[3
]}

机构：

[1] Beijing University of Posts and Telecommunications,Beijing ,PRChina

[2] China Mobile Communications Corporation,Beijing ,PRChina

[3] Department of Systems and Computer Engineering,Carleton University,Ottawa,ON,Canada

来源：

中国通信 | 2012年 / 9卷 / 09期

关键词：

spectrum access; cognitive radio; POMDP;

D O I：

暂无

中图分类号：

TN925 [无线电中继通信、微波通信];

学科分类号：

080402 ; 080904 ; 0810 ; 081001 ;

摘要：

Due to the problem of spectrum underutilization and energy inefficiency in wireless communications,the research on energy efficient Cognitive Radio Networks (CRNs) has received significant attention in both industry and academia.In this paper,we consider the problem of optimal spectrum selection and transmission parameters design with the objective of minimizing energy consumption in CRNs.Since the system state cannot be directly observed due to miss detections and estimation errors,we formulate the optimal spectrum access problem as a Partially Observable Markov Decision Process (POMDP).In particular,the proposed scheme selects the optimal spectrum,modulation and coding scheme,transmission power,and link layer frame size in each time slot according to the belief state,which captures all the history information of past actions and observations.The optimal policy can be acquired by solving POMDP problem with linear programming based algorithm.Simulation results show that significant energy savings can be achieved by the proposed scheme.

引用

页码：127 / 130

页数：4