Wide area and wide band spectrum monitoring system based on sensor networks

With the increasing importance of radio spectrum in the national economy and safety, this paper develops a wide area and wide band radio spectrum monitoring system which uses sensor networks. The significant contribution of the paper is introducing wireless sensor networks into the design of the spectrum monitoring system. A spectrum monitoring oriented private network architecture is designed to realize the networked spectrum monitoring, and make the multi-node cooperation possible. So far, our system has covered the old and new campus of Xidian University, the forth telecom science institute, and other test regions, and continuously operated for two years. Under the monitoring band with 20MHz-8GHz, the system can achieve integrated comprehensive signal processing and intelligent analysis including signal detection, modulation recognition and location-tracking. The system solves the problems of spectrum monitoring and signal processing, which can be applied to spectrum monitoring in the complex electromagnetic environment.