NC-OFDM卫星通信方法及系统仿真  

NC-OFDM Satellite Communication and System Simulation

作　　者：王勇[1,2] 赵青松 王迪 王磊 WANG Yong;ZHAO Qing-song;WANG Di;WANG Lei(College of Electronic Countermeasure,National University of Defense Technology,Hefei Anhui 230037,China;Anhui Province Key Laboratory of Electronic Restriction,Hefei Anhui 230037,China)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230037 [2]电子制约技术安徽省重点实验室,安徽合肥230037

出　　处：《计算机仿真》2022年第7期60-63,212,共5页Computer Simulation

基　　金：国家自然科学基金资助项目(61671454,61901490);安徽省自然科学基金资助项目(1808085MF190)。

摘　　要：为了提高卫星通信的频谱利用效率,提出基于认知无线电的非连续正交频分复用(Non-continuous Orthogonal Frequency Division Multiplexing,NC-OFDM)卫星通信方法,研究了NC-OFDM子载波分配方法、系统建模仿真和对授权用户的干扰分析。基于频谱感知的子载波分配方法实现了NC-OFDM卫星通信系统对频谱空洞的有效利用,系统仿真结果和干扰分析表明,NC-OFDM卫星通信能够提高频谱利用率,并且在采用频谱感知和自适应信道接入技术的条件下,NC-OFDM卫星通信系统能够与授权用户实现频谱兼容。In order to improve the spectrum utilization efficiency of satellite communications,a non-continuous Orthogonal Frequency Division Multiplexing(NC-OFDM) satellite communication method based on cognitive radio is proposed.Through modeling and simulation of NC-OFDM system,a sub-carrier allocation method was proposed and the interference to anthorized users was analyzed.A sub-carrier allocation method based on spectrum sensing was proposed to achieve the effective use of spectrum holes in the NC-OFDM satellite communication system.System simulation results and interference analysis show that,based on the proposed technology,the spectrum utilization of satellite communications can be improved;Under the condition of adopting spectrum sensing and adaptive channel access technology,spectrum compatibility between the NC-OFDM satellite communication system and anthorized users can be realized.

关 键 词：非连续正交频分复用 卫星通信 子载波分配 系统仿真 干扰 

分 类 号：TN927.2[电子电信—通信与信息系统]