KEYWORDS: Satellites, Detection and tracking algorithms, Power grids, Satellite communications, Data transmission, Climatology, Climate change, Education and training, Resistance, Deep learning
In this paper, the scenario of single satellite assisted emergency rescue network is proposed for power grid, in which the satellite moves to the position over the surviving node in the power grid, broadcasts information to the nodes in the coverage area through the downlink. The surviving node collects decodes the received signals, and then uploads the data information based through the uplink to the satellite. An algorithm is given by applying the Self-correcting Deep Q Network (SCDQN) algorithm in the Dueling Deep Q Network (DQN) network structure, and the dynamic resource allocation algorithm is proposed. In the proposed algorithm, the self-correcting DQN algorithm is selected as the base algorithm, which can realize self-correction. Both the estimated value network and the target value network adopt the Dueling DQN structure, which replaces the evaluation of the action value in the original DQN by evaluating the state value and the action value respectively. The improved algorithm can achieve efficient and stable convergence. The validity of the algorithm is verified through the simulation experiments and the superiority of the algorithm is verified through comparison.
KEYWORDS: Rain, Signal attenuation, Satellite communications, Satellites, Signal to noise ratio, Data modeling, Telecommunications, Sensors, Environmental monitoring, Data communications
Under the current climate change background, extreme weather events occur frequently, and meteorological factors will directly affect the quality of satellite communication links. In order to deal with the consequent risks, it is urgent to provide a satellite communication rainfall attenuation management system that can provide accurate monitoring and trend prediction. This will help to send a warning in advance, so that satellite stations can take timely response measures. Through the research on rainfall attenuation monitoring and analysis of satellite communication signals in Beijing West Satellite Station, a rainfall attenuation prediction model is established based on local historical and real-time rainfall data, the impact of rainfall attenuation on the channel in Ku band satellite communication is analyzed, and the solutions to effectively deal with the adverse impact of rainfall attenuation on Ku band satellite communication are proposed, Comprehensively improve the communication guarantee capability of satellite stations, and better provide stable and smooth satellite communication services for emergency communication.
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