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http://dx.doi.org/10.11003/JPNT.2016.5.1.011

Implementation and Performance Analysis of Multi-GNSS Signal Collection System using Single USRP  

Park, Kwi Woo (Department of Electronics Engineering, Chungbuk National University)
Choi, Yun Sub (Department of Electronics Engineering, Chungnam National University)
Lee, Min Joon (Agency for Defense Development)
Lee, Sang Jeong (Department of Electronics Engineering, Chungnam National University)
Park, Chansik (Department of Electronics Engineering, Chungbuk National University)
Publication Information
Journal of Positioning, Navigation, and Timing / v.5, no.1, 2016 , pp. 11-20 More about this Journal
Abstract
In this paper, a system that can collect GPS L1 C/A, GLONASS G1, and BDS B1I signals with single front-end receiver was implemented using a universal software radio peripheral (USRP) and its performance was verified. To acquire the global navigation satellite system signals, hardware was configured using USRP, antenna, external low-noise amplifier, and external oscillator. In addition, a value of optimum local oscillator frequency was selected to sample signals from three systems with L1-band with a low sampling rate as much as possible. The comparison result of C/N0 between the signal collection system using the proposed method and commercial receiver using double front-end showed that the proposed system had 0.7 ~ 0.8dB higher than that of commercial receiver for GPS L1 C/A signals and 1 ~ 2 dB lower than that of commercial receiver for GLONASS G1 and BDS B1I. Through the above results, it was verified that signals collected using the three systems with a single USRP had no significant error with that of commercial receiver. In the future, it is expected that the proposed system will be combined with software-defined radio (SDR) and advanced to a receiver that has a re-configuration channel.
Keywords
USRP; GNSS signal; front-end; Software-Defined radio;
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