Due to the ubiquity of wireless communication systems, electromagnetic environment over the sea has become more and more complex, which leads to the urgent demand on the cognition of electromagnetic environment and the accurate illustration of electromagnetic situation. In this paper, an optimal methodology to calculate the electromagnetic spatial energy distribution over the sea has been proposed. Based on the computation results, the electromagnetic environment situation map has been generated to illustrate the electromagnetic energy distribution over the sea under observation. According to the real-time information of equipment provided by database, the visualization work can be accomplished promptly to provide valuable information for potential interference discovery and decision making over the sea. In addition, an approach for spectrum management and distribution has also been proposed to discover vacant frequency band, which can improve the efficiency of spectrum utilization.
Due to the deployment flexibility and broad coverage capabilities, High Altitude Platform Station is an efficiency solution of communication access for underserved areas like remote areas. However, for some special scenarios, multiple platforms may need to collaborate to overcome the effects of terrain. But the interferences introduced by multiple carriers and access links may hinder the process and restrict its practicability. In order to eliminate these interferences, a proposal on multiple carrier frequency offsets (MCFO) compensation algorithm was provided in this paper. Furthermore, this paper analyzed the lower bound of bit error ratio (BER) for cooperative HAPS systems. Simulation was also carried out, and the results validate the correctness of our theoretical analysis results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.