基于GNU Radio和USRP的未知信号检测技术研究

Unknown Signal Detection Technology based on Gnu Radio and USRP

近两年,"黑广播"、伪基站等非法无线电信号,严重影响民航,诈骗人民财产安全。尽管无线电管理部门采取高压态势,但是技术更迭使这类设备愈加便宜和小型化,且可安装在高楼、大树等处,辐射远超国家标准,严重影响附近居民的身心健康。以最新的软无平台——USRP+GNU Radio为架构基础,设计并实现以自动探测未知信号的系统,采用能量检测算法,实现了其对大功率信号检测的良好效果。系统能获得未知信号的相关参数,而后续研究可通过多点共同协作,计算未知信号的距离和方位,以便及时消除隐患,捍卫无线电空域安全。

In recent years, ＂black broadcasting＂, pseudo base-station and other illegal radio signals seriously affect civil aviation and defraud the people＇s property. Despite the high pressure of radio management, technological changes make these devices cheaper and smaller. And these devices may be installed in tall buildings, big trees and so on, and their radiation is far beyond the national standard, all this seriously affects the physical and mental health of the residents nearby. Based on the latest soft non platform USRP＋GNU Radio architecture, the system for automatic detection of unknown signals is designed and implemented. The energy detection algorithm is used to realize the high-power signal detection. This system can obtain the related parameters of unknown signals. Subsequent research may focus on calculating distance and azimuth of unknown signals through multi-point collaboration, so as to timely eliminate hidden dangers and safeguard radio-airspace safety.