Satellite navigation is playing an important role in social life.The performances of the services a navigation system provides are the concern of the builders and users.The signal structure determines the inherent abi...Satellite navigation is playing an important role in social life.The performances of the services a navigation system provides are the concern of the builders and users.The signal structure determines the inherent ability of a satellite navigation system to provide these services.Therefore,it is necessary and reasonable to optimize the signal in the initial design.The waveforms of signals in satellite navigation chips are an important aspect of the signal's structure,which impact the characteristics of the autocorrelation function and power spectrum in the time domain and frequency domain.The range accuracy of a navigation system is usually described by its Gabor Bandwidth.The Gabor Bandwidth of the Binary Offset Carrier (BOC) modulation in next-generation GNSS signal systems is not optimal.This paper presents a signal expression based on Multilevel Coded Symbol (MCS) signals,which can describe the fine structure of navigation signals.With this expression,we can optimize the Gabor Bandwidth of the signal,and find out the corresponding MCS vector and chip waveform,so as to get higher range accuracy.The method in this paper,in theory,is of great value in the design of next-generation navigation signals.展开更多
基金supported by the Best Paper Award of China Satellite Navigation Conference (Grant No.CSNC2010-QY-003)the CAST Innovation Foundation (Grant CAST20100405)
文摘Satellite navigation is playing an important role in social life.The performances of the services a navigation system provides are the concern of the builders and users.The signal structure determines the inherent ability of a satellite navigation system to provide these services.Therefore,it is necessary and reasonable to optimize the signal in the initial design.The waveforms of signals in satellite navigation chips are an important aspect of the signal's structure,which impact the characteristics of the autocorrelation function and power spectrum in the time domain and frequency domain.The range accuracy of a navigation system is usually described by its Gabor Bandwidth.The Gabor Bandwidth of the Binary Offset Carrier (BOC) modulation in next-generation GNSS signal systems is not optimal.This paper presents a signal expression based on Multilevel Coded Symbol (MCS) signals,which can describe the fine structure of navigation signals.With this expression,we can optimize the Gabor Bandwidth of the signal,and find out the corresponding MCS vector and chip waveform,so as to get higher range accuracy.The method in this paper,in theory,is of great value in the design of next-generation navigation signals.
