频空二维干扰温度模型  

Frequency and spatial two-dimensional interference temperature model

作　　者：张兴良[1] 王可人[1] 樊甫华[1] 

机构地区：[1]电子工程学院信息工程系,合肥230037

出　　处：《海军工程大学学报》2013年第6期43-47,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(61171170)

摘　　要：由于传统干扰温度模型没有考虑有向通信问题,导致认知用户发现可用频谱资源不充分。为此,提出一种改进的干扰温度模型,以提高认知用户的频谱利用率。首先,将空域参数引入到传统干扰温度模型中,在频空域上建立一种改进的干扰温度模型;然后,分别在理想条件下和广义条件下推导基于改进后干扰温度模型的认知用户约束条件;最后,为指导认知用户功率控制,将认知用户天线方向图系数加入到改进后的模型中。仿真实验结果表明:通过利用空间接入机会,改进后的模型将可用频谱资源增加3倍以上;在有向通信条件下,改进后的干扰温度模型对于提高认知用户通信质量具有实用价值。For the traditional interference temperature model, the directional communication problem was not taken into account, so cognitive users found the available spectrum resource to be insuffi- cient. To settle this problem, this paper proposes an improved interference temperature model to in- crease the spectrum efficiency of cognitive users. First, the spatial parameters are introduced in the traditional interference temperature model to establish an improved model in frequency-spacedomain. Then, the constraints on cognitive users, based on the improved model, are deduced respectively from the ideal and generalized conditions. Finally, in order for cognitive users to know how to control transmitting power, the antenna pattern factor is added to the improved model. The simulation result shows that the improved model can raise the available spectrum resource more than 3 times by taking spatial opportunities. Therefore, the improved model is of high practical value to the improvement of communication quality of cognitive users under directional communication conditions.

关 键 词：认知用户 干扰温度 有向通信 频谱空洞 

分 类 号：TN929.5[电子电信—通信与信息系统]