认知无线电中基于智能天线的频谱检测技术  

Spectrum Detection Technologies Using Smart Antenna in Cognitive Radio

作　　者：张兴良 郑金金 王振 ZHANG Xing-liang ZHENG Jin-jin WANG Zhen(Unit 94855 of PLA, Quzhou Zhejiang 324001, China)

机构地区：[1]解放军94855部队

出　　处：《通信对抗》2017年第1期24-28,36,共6页Communication Countermeasures

摘　　要：已有的频谱感知算法没有考虑无线信号的方向性,对频谱信息的检测不够充分。为此,利用智能天线技术和无线信号的传播模型对主用户的多种信息进行检测。首先用MUSI C算法检测主用户信号方向,然后基于预置零点方法检测噪声和主用户信号功率,最后计算主用户位置。文中方法可以对所有主用户分别进行检测,且感知信息全面,仿真实验验证了该方法的有效性。Detection free spectrum by the existing spectrum sensing algorithm is insu^cient without consider- ing the direction of wireless signal. Thus, the smart antenna technology and wireless signal transmission model are utilized for detecting multi-information of primary users in this paper. Firstly, MUSIC algorithm is used to detect the direction of primary users. Then the noise and signal power of primary users are detected based on the null control method. Finally, we compute the location of primary users. The proposed method can get all main users separately and sense enough. The validity of the algorithm is demonstrated by the results of simula- tion experiments.

关 键 词：认知无线电 智能天线 频谱感知 传播模型 零点控制 

分 类 号：TN92[电子电信—通信与信息系统]