Analysis on BDS signal ranging performance onboard LEO satellite

摘要

Global Navigation Satellite System (GNSS) is used to achieve low Earth orbiting (LEOs) satellites orbit determination and time synchronisation. The high accuracy time synchronisation and orbit determination between satellites are completely dependent on time and phase measurement accuracy of GNSS receiver. In this paper, the distortions of new BDS signal and the performance of spaceborne receivers are mainly analysed. The satellite orbit data are used to calculate the dynamics of radial distance, velocity, and acceleration between the LEO satellite and the BDS satellites, such as geostationary (GEO) and medium Earth orbit (MEO). In acquisition processing, the effects of signal correlation performance and carriers Doppler are analysed, such as the correlation loss, the drift of correlation curve and the bit inversion. In tracking processing, the carrier-to-noise ratio, tracking accuracy of code and carrier are simulated in the case of dynamic, especially the BDS signal is simulated.