NDLI: Zero-bias elimination with selective non-commensurate sampling for PN code tracking

Content Provider	IET Digital Library
Author	Ma, Chunjiang Ni, Shaojie Tang, Xiaomei Xiao, Zhibin Sun, Guangfu
Abstract	Zero bias is the main source of error in high-precision applications based on pseudo-noise (PN) ranging. This study proposes a selective non-commensurate sampling frequency design method applied to the digital code-tracking loop which can effectively suppress the code-phase zero bias caused by incomplete sampling of the spread spectrum signal. The maximum (MAX) and standard deviation (STD) of the zero bias independent of code and the initial phase are used to design the sampling frequency. The code correlation reference waveform is utilised to establish a statistical analysis model of the digital discriminator zero bias. Analytical expressions of the zero-bias MAX and STD are derived. The performance of the proposed method is assessed as per code Doppler, binary offset modulation, and thermal noise. Fibre optic time synchronisation equipment is used to determine the feasibility of eliminating PN code-tracking zero bias based on selective non-commensurate sampling.
Starting Page	349
Ending Page	355
Page Count	7
ISSN	17518784
Volume Number	14
e-ISSN	17518792
Issue Number	Issue 3, Mar (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/14/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2019.0161
Journal	IET Radar, Sonar & Navigation
Publisher Date	2019-10-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analytical Expressions Binary Offset Modulation Code Code Correlation Reference Waveform Code-phase Zero Bias Digital Code-tracking Loop Digital Discriminator Zero Bias Doppler Shift Fibre Optic Time Synchronisation Equipment High-precision Application Incomplete Sampling Maximum Deviation Modulation Per Code Doppler PN PN Code Tracking Pseudonoise Code Pseudonoise Imaging Selective Noncommensurate Sampling Frequency Design Method Signal Processing And Detection Signal Sampling Spread Spectrum Communication Spread Spectrum Signal Sampling Standard Deviation Statistical Analysis Statistical Analysis Model Statistics STD Synchronisation Thermal Noise Zero-bias Elimination Zero-bias MAX
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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