De-centralized Networked Distributed Collaborative Location of Civil Unmanned Aerial Vehicles Image Transmission Signal

recently monitoring and locating of civil unmanned aerial vehicles (UAVs) have become research hotspots as the rapid development and application of various UAVs brings increasingly severe safety threaten. The image transmission signals or remote controlling signals of mainstream UAVs feature large signal bandwidth, low signal power spectral density. Frequency-hopping spectrum spreading and direct spectrum spreading technologies are widely applied as well, which further increase the difficulty of detecting the transmitted signals of UAVs. This paper focuses on the technology of locating UAVs through passive time difference positioning methods, and combining the signal transmission characteristics of UAVs, optimizes the time delay estimation algorithm in time difference positioning methods, and designs a distributed collaborative location implements of UAVs based on their image transmission signal, the processing architecture of de-centralized networked location is descripted and the experiment results with actual UAVs are presented to verify the effectiveness of the proposed technology.