Software Defined Radio technology for GNSS receivers

Presti, Letizia Lo; Falletti, Emanuela; Nicola, Mario; Gamba, Micaela Troglia

doi:10.1109/metroaerospace.2014.6865941

Cited by 24 publications

(17 citation statements)

References 19 publications

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“…When budgets and time are both under pressure, they inevitably select simulators, but simulators cannot anticipate the full richness and variety of real-world conditions. In this sense, the record-and-replay method, which is derived from software-defined radio (SDR) paradigm [17], is one of the easy and efficient means of characterizing new high-performing product performance in the real world by providing a combination of realism and repeatability, which is ideal for performance verification.…”

Section: Gnss Signal Recording and Replayingmentioning

confidence: 99%

Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test

et al. 2019

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The performance of global navigation satellite system (GNSS) receivers in dynamic modes is mostly assessed using results obtained from independent maneuvering of vehicles along similar trajectories at different times due to limitations of receivers, payload, space, and power of moving vehicles. However, such assessments do not ensure valid evaluation because the same GNSS signal environment cannot be ensured in a different test session irrespective of how accurately it mimics the original session. In this study, we propose a valid methodology that can evaluate the dynamic performance of multiple GNSS receivers in various positioning modes with only one dynamic test. We used the record-and-replay function of RACELOGIC's LabSat3 Wideband and developed a software that can log and re-broadcast Radio Technical Commission for Maritime Services (RTCM) messages for the augmented systems. A preliminary static test and a drone test were performed to verify proper operation of the system. The results show that the system could efficiently evaluate the performances of stand-alone, differential GNSS, and real time kinematics positioning for three GNSS receivers in two different positioning modes by repeatedly re-radiating the recorded signals acquired through only one flight. Our proposed system is expected to be useful in evaluating dynamic navigation performance accurately and conveniently in a valid manner.

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Section: Gnss Signal Recording and Replayingmentioning

confidence: 99%

Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test

et al. 2019

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“…The term SDR refers to an ensemble of hardware and software technologies enabling reconfigurable radio communication architectures (Lo Presti et al 2014). More in detail, SDR receivers are radio communication architectures, made up of configurable hardware and software blocks and performing advanced signal processing operations.…”

Section: Sdr Technology and Architecturementioning

confidence: 99%

Software-defined radio technology for GNSS scintillation analysis: bring Antarctica to the lab

2018

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Global navigation satellite systems (GNSSs) are widely used to support logistics, scientific operations, and to monitor the polar ionosphere indirectly, which is a region characterized by strong phase scintillation events that severely affect the quality and reliability of received signals. Professional commercial GNSS receivers are widely used for scintillation monitoring; on the contrary, custom-designed solutions based on data grabbers and software receivers constitute novelty. The latter enables a higher level of flexibility and configurability, which is important when working in remote and severe environments. We describe the scientific, technological, and logistical challenges of installing an ionospheric monitoring station in Antarctica, based on a multi-constellation and multi-frequency GNSS data grabber and a software-defined radio receiver. Having access to the full receiver chain and to intermediate signal processing stages allows a deep analysis of the impact of scintillation and, in turn, a better understanding of the physical phenomenon. The possibility to process high-resolution raw intermediate frequency samples of the signal enables not only the computation of scintillation indexes with the same quality as professional devices but also the design and test of innovative receiver architectures and algorithms. Furthermore, the record and replay approach offers the possibility to process in the lab the signals captured on site, with high fidelity level. It is like being in Antarctica again, but with an unlimited set of receivers and higher computational, storage, and bandwidth resources. The main advantages and disadvantages of this approach are analyzed. Examples of monitoring results are reported, confirming the monitoring capabilities, showing the good agreement with commercial receiver outputs and confirming the validity of post-processing and replay operations.

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“…The growth of SDR offers small satellites the opportunity to improve the way space missions develop and operate transceivers for communication network in space as seen in [36] and [40]. The ability to change the operating characteristics of a radio through software once deployed to space offers the flexibility to adapt to new science opportunities and recover from anomalies within the science payload or communication system e.g., in Global Navigation Satellite Systems (GNSS) receivers as in [38,39]. Also, potentially reduce development cost and risk by adapting generic space platforms to meet specific mission requirements.…”

Section: Improvements In Cpu and Fpga Performance For Small Satellite Smentioning

confidence: 99%

Improvements in CPU & FPGA Performance for Small Satellite SDR Applications

Maheshwarappa

Bowyer

Bridges

2017

IEEE Trans. Aerosp. Electron. Syst.

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Abstract-The ongoing evolution in constellation/formation of CubeS ats along with steadily increasing number of satellites deployed in Lower Earth Orbit (LEO), demands a generic reconfigurable multimode communication platforms. As the number of satellites increase, the existing protocols combined with the trend to build one control station per CubeS at become a bottle neck for existing communication methods to support data volumes from these spacecraft at any given time. This paper explores the S oftware Defined Radio (S DR) architecture for the purposes of supporting multiple-signals from multiple-satelli tes , deploying mobile and/or distributed ground station nodes to increase the access time of the spacecraft and enabling a future S DR for Distributed S atellite S ystems (DSS). Performance results of differing software transceiver blocks and the decoding success rates are analysed for varied symbol rates over different cores to inform on bottlenecks for Field Programmable Gate Array (FPGA) acceleration. Further, an embedded system architecture is proposed based on these results favouring the ground station which supports the transition from single satellite communication to multi-satellite communications.

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Software Defined Radio technology for GNSS receivers

Cited by 24 publications

References 19 publications

Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test

Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test

Software-defined radio technology for GNSS scintillation analysis: bring Antarctica to the lab

Improvements in CPU & FPGA Performance for Small Satellite SDR Applications

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