A Novel Skywave Over-the-Horizon Transmission Scheme for Remote Island Reef Environment Monitoring Based on Wide-area Collaborative Reception

To improve the high cost and low reliability long-distance transmission methods for environmental monitoring, a transmission frame of over-the-horizon(OTH) skywave access network was proposed based on wide-area cooperative reception, to solve the problem of the insufficient of energy supply for remote reefs. The frame, which is also constructed by mobile communication base stations, solves transmission problems of channel fading, link asymmetry, and spectrum congestion that are faced by remote islands and reefs environments monitoring for an OTH skywave in three aspects: physical layer, network layer, and perceptive layer. The transmission waveform of lower link and the multi-channel fusion algorithm is texted in the typical skywave channel environment. The simulation results show that only the cooperative reception of three access node is needed to ensure the reliable access of transceiver in remote islands and reefs within a range of 3000Km. The proposed access network depends on the access node of communication base station, which is the construction of China Tower Corporation, and the existing coast transceiver directly as a sending node. What is more, the cost of construction and operation is extremely low. Thus, the design of the link transmission waveform and multichannel fusion algorithm can effectively ensure the reliable reported data of environmental monitoring within a range of 3000 Km. It provides theoretical and technical foundations for the study of the construction of remote environmental monitoring network. There is also some reference to monitoring of national ocean-going ships.