Software-based Global Positioning System (GPS) receivers have been recognized as an effective research platform in recent years. The impact of oscillator frequency offset on hardware receiver and software receiver signal processing is contrasted based on a refined signal model and cross correlation function (CCF) analysis. Several online clock error correction algorithms are presented to produce unbiased measurements and clock error estimates with known and unknown front end frequency plans and with and without signal tracking and navigation solutions for single- and dual-frequency receivers on both static and dynamic platforms. The CCF formulation and the clock correction performance are validated using simulated signals and real single- and dual-frequency GPS data. The raw frequency error measurements with 0.02 s time resolution for an oven controlled crystal oscillator (OCXO) using real GPS signal report an Allan deviation (ADEV) of 1.3E-11 and a standard deviation of 1.56E-11.
Oscillator Frequency Offset Impact on Software GPS Receivers and Correction Algorithms
IEEE Transactions on Aerospace and Electronic Systems ; 49 , 4 ; 2158-2178
2013-10-01
5523819 byte
Article (Journal)
Electronic Resource
English
On Decision Aided Carrier Phase and Frequency Offset Estimation in Coherent Optical Receivers
British Library Online Contents | 2013
|Error analysis of frequency estimation algorithm based on frequency offset correction
British Library Online Contents | 2010
|