The complex large constellations in both high,medium,and low orbits are the development direction of the next generation of global navigation satellite system (GNSS),especially the large-scale deployment of low orbit satellites,which puts higher requirements on the cost,weight,and power consumption of beam scanning antennas in the space and ground segments of GNSS. However,traditional electric scanning phased array antennas and mechanical scanning antennas cannot meet these requirements well. In recent years,reconfigurable intelligent surface (RIS) has received great attention due to its ability to control the direction of beam propagation at low cost and power consumption,and is considered as one of the key technologies in the next generation of mobile communication to improve network capacity and coverage. Using RIS to solve antenna problems in satellite navigation systems has great potential,but it also faces many challenges. Based on the development needs of next-generation satellite navigation systems,this paper briefly introduced the basic principles and current development status of RIS,focused on analyzing the application prospects of RIS in satellite navigation systems,and proposed the core key technologies that should be addressed.
global navigation satellite systems (GNSS)reconfigurable intelligent surface (RIS)beam controlchannel measurement
NETL
NSTL
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