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RECEIVER DESIGN FOR DOPPLER POSITIONING WITH LOW EARTH ORBIT SATELLITES AND DIFFERENTIAL CARRIER PHASE MEASUREMENTS
RECEIVER DESIGN FOR DOPPLER POSITIONING WITH LOW EARTH ORBIT SATELLITES AND DIFFERENTIAL CARRIER PHASE MEASUREMENTS
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机译：低地球轨道卫星和差分载波相位测量的多普勒定位接收机设计
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摘要
System and device configurations, and processes are provided for determining position based on low Earth orbit (LEO) satellite signals. Frameworks described herein can include performing Doppler frequency measurement for received quadrature phase shift keying (QPSK) signals. The framework may include channel tracking operations to determine Doppler shift measurements, a navigation filter operation to determine clock drift based on each Doppler shift measurement from each channel tracking loop, and determining position of a device based on LEO satellite signal sources. Frameworks described herein are also provided for carrier phase differential (CD) - low Earth orbit (LEO) (CD-LEO) measurements that may utilize a base and a rover without requiring prior knowledge of rover position. Embodiments can also cancel effects of ionospheric and tropospheric delays on the carrier phase and CD-LEO measurements.
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