INVESTIGATION ON CHARACTERISTICS OF RECEIVER’S INITIAL PHASE BIAS CHANGE
接收机载波初始相位偏差变化特性分析

Satellite and receiver’s Initial Phase Biases(IPBs) have a significant influence on ambiguity resolution and convergence time of precise point positioning(PPP).The current receiver IPB is experimentally confirmed to be different when the receiver is turned off and back on.However,its underlying characteristics are seldom investigated in available literatures.On the basis of receiver design and carrier phase measurement mechanism,the article analyzed the impacts of frequency synthesizer,mixer,digital down converter and tracking loop on carrier phase measurement generation.Meanwhile,the mathematical models of carrier phase measurement and IPB are derived.Finally,the receiver IPB’s long-term stability and characteristics according to loss of lock,time adjust and power-on cycle are validated by experiment using navigation signal source and receiver platform.