A Novel Interference Modeling Scheme in Cognitive Networks  

作　　者：李剑 李生红 

机构地区：[1]Department of Electronic Engineering,Shanghai Jiaotong University [2]The Third Research Institute of Ministry of Public Security of P.R.C

出　　处：《Journal of Shanghai Jiaotong university(Science)》2015年第5期540-547,共8页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.61071152 and 61271316);the National Basic Research Program(973)of China(Nos.2010CB731406 and 2013CB329605);the National"Twelfth Five-Year"Plan for Science&Technology Support(No.2012BAH38B04)

摘　　要：In this paper,we propose a mathematical model of aggregate co-channel interference over Rayleigh fading in cognitive networks.Unlike the statistical models in the literature that aim at finding the bound or approximation of the interference,the proposed model gives an accurate expression of probability density function(PDF),cumulative distribution function(CDF) and mean and variance of the interference,which takes into account a number of factors,such as spectrum sensing scheme,and spatial distribution of the secondary users(SUs).In particular,we focus on a more general spatial structure where there are two roles of primary users(PUs)and the interfering SUs distributed in the two-dimensional space.The framework developed in this paper is easy to be applied in power control,error evaluation and other applications.In this paper,we propose a mathematical model of aggregate co-channel interference over Rayleigh fading in cognitive networks.Unlike the statistical models in the literature that aim at finding the bound or approximation of the interference,the proposed model gives an accurate expression of probability density function（PDF）,cumulative distribution function（CDF） and mean and variance of the interference,which takes into account a number of factors,such as spectrum sensing scheme,and spatial distribution of the secondary users（SUs）.In particular,we focus on a more general spatial structure where there are two roles of primary users（PUs）and the interfering SUs distributed in the two-dimensional space.The framework developed in this paper is easy to be applied in power control,error evaluation and other applications.

关 键 词：interference modeling cognitive networks 

分 类 号：TN911.4[电子电信—通信与信息系统]