Open AccessSub sampling based software GPS receiver
Author(s) -
M Harshali,
M. Venu Gopala Rao
Publication year - 2018
Publication title -
international journal of engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2227-524X
DOI - 10.14419/ijet.v7i2.7.10931
Subject(s) - global positioning system , sampling (signal processing) , precision lightweight gps receiver , software , gps disciplined oscillator , computer science , gps signals , assisted gps , time to first fix , gps receiver , real time computing , signal processing , signal (programming language) , telecommunications , digital signal processing , computer hardware , detector , programming language
This paper focuses on reducing the processing time of software GPS receiver using sub-sampling techniques. As the GPS signals are wide band signals, sampling frequency is very high. Sub-sampling enables to reduce time for processing. From the simulation results, it is observed that the sampling frequency can be reduced up to 2.5 MHz without loss of tracked signal. The processing time is reduced for software GPS receiver after sub-sampling. The overall reduction in processing time is from 3.456647 sec to 2.15946 sec respectively for sampling frequency 5 MHz , 2.5 MHz. Thus time saved is 37% of the original one.