Open AccessMeasurements of Signal Delays in Software Defined Radio with Use of GNSS Modules
Author(s) -
Oskar Mężyk,
Michał Doligalski,
Ryszard Rybski
Publication year - 2019
Publication title -
annual of navigation
Language(s) - English
Resource type - Journals
eISSN - 2300-6633
pISSN - 1640-8632
DOI - 10.1515/aon-2019-0010
Subject(s) - gnss applications , software defined radio , latency (audio) , computer science , software , radio signal , signal (programming language) , embedded system , real time computing , rf front end , computer hardware , global positioning system , electronic engineering , radio frequency , telecommunications , engineering , operating system , programming language
In the work a method of latency measurement in software defined radio (SDR) is proposed and validated. The test setup uses customer grade GNSS modules as reference time sources and enables relative delay calculation between signals received directly and those bypassed through SDR platform. The method is hardware agnostic in a sense, that it does not involve any custom software or hardware modifications. Tests that compare reported carrier-to-noise ratio and positioning errors were performed to prove functionality of such system. Additionally, authors measured several gnuradio blocks with respect to their impact on total latency introduced into signal path. All tests were performed on a bladeRF low-cost RF front-end. Minimum observed latency for the signal was below 10 ms.