| Citation: | CHAI Jiaxin, WANG Xinlong, YU Nengjie, et al. Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(7): 1496-1503. doi: 10.13700/j.bh.1001-5965.2017.0502(in Chinese)
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In the application of global navigation satellite system (GNSS) in high-orbit environment, satellite signal propagation link is complex with large attenuation and non-uniform intensity distribution. These signal link characteristics influence theoretical analysis and engineering application. In order to solve these new problems, GNSS signal link model from GNSS transmitting antenna to high-orbit spacecraft receiver was established. Based on the signal link model, signal intensity distribution of high-orbit spacecraft was obtained by the equivalent gain overall link simulation. On this basis, the availability of dual constellation, three constellations or four constellations integrated GNSS was discussed and compared. It provides reliable theoretical basis for engineering applications such as GNSS signal characteristic analysis, sensitivity selection of multimode receiver and acquisition and tracking algorithm design.
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