OEM

Rohde & Schwarz Offers Fast Production Testing for GNSS Receivers

August 11, 2015By
The R&S SMBV100A vector signal generator equipped with the SMBV-P101 package.

Rohde & Schwarz now offers a new, speed-optimized production tester — the R&S SMBV100A vector signal generator equipped with the R&S SMBV-P101 package. During production testing of modules and receivers for satellite-based communications, the basic GNSS signal reception and the connection between the antenna and GNSS chipset need to be checked. The GNSS production tester simulates separate satellites for the GPS, GLONASS,... read more

A Satellite with Personality

August 7, 2015By
SVN49 in space  (artist’s rendering).  The signal anomaly from SVN 49 alerted researchers to new possibilities in analysis and monitoring.

Chip Transition-Edge Based Signal Tracking for Ultra-Precise GNSS Monitoring Applications
This novel concept of monitoring chip asymmetry can extend the state of the art in the areas of GNSS signal-quality monitoring and authentication. Tracking GNSS signals using their underlying spreading sequence chip transition edges reveals positive versus negative chip asymmetries that are characteristic to each satellite. This asymmetry is due to various types of natural signal deformation that is known to occur within the satellite’s signal generation and transmission hardware. read more

Locata Positioning Will Underpin NASA’s Unmanned Aerial System Research


August 6, 2015By
NASA-UAS-O

NASA plans to install a Locata network (LocataNet) as the core positioning technology for safety-critical unmanned aerial systems (UAS) research at its Langley Research Center in Hampton, Va., according to an announcement by Locata. NASA Langley is tasked with performing rigorous and repeatable scientific evaluation of new 
UAS safety and technology concepts under development. The LocataNet will provide high-precision non-GPS-based... read more

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A Scintillating Project

August 1, 2015By
Setting up the receiver antenna for the offshore trial on board the Geograph vessel.

Countering Ionospheric Disturbances Affecting GNSS in Brazil By Marcio Aquino After 27 months of intense research, the CALIBRA project ended successfully in February 2015, with the project team devising solutions to tackle the effects of perturbations typical of the Brazilian ionosphere on high-accuracy GNSS positioning. CALIBRA was funded by the European Union and the European GNSS Agency. Kicked off in 2012, CALIBRA first confirmed the vulnerability of... read more

Sentry Stands on Jammer Alert

July 31, 2015By
FIGURE 4. Urban area test; jammer locations
in yellow, locations delivered by Signal
Sentry in red, sensor locations in green.

By Jeffrey Coffed and Joseph Rolli, Harris The first and best step to combat the growing worldwide problem of GPS jamming is to pursue technologies that can detect and locate the jammers. Signal Sentry 1000 uses arrayed sensors to do just that: look out for jamming and track down its source once sensed. An array of sensors can be deployed... read more

CSR Acquisition by Qualcomm Finalized with Name Change

July 30, 2015By

CSR is becoming Qualcomm Technologies International. Qualcomm started the acquisition process for CSR in October 2014. With the expected close of the acquisition in two weeks on Aug. 13, the name of the company — Cambridge Silicon Radio Limited, or CSR — will be changed to Qualcomm Technologies International Ltd. (QTIL). Here is the renamed company’s contact information: Qualcomm Technologies International, Ltd.... read more

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QinetiQ Announces Robust GNSS Receiver for Galileo PRS

July 14, 2015By
The QinetiQ PRS receiver.

QinetiQ today announced a major breakthrough in developing a robust navigation receiver that will use the Galileo, Europe’s satellite navigation system — in particular, the secured Public Regulated Service (PRS). QinetiQ’s new high-performance, next-generation GNSS receiver is multi‑constellation and multi‑frequency, and is designed to process encrypted signals from the Galileo PRS service as well as open services such as GPS. Qinetiq introduced the... read more

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Street Smart: 3D City Mapping and Modeling for Positioning with Multi-GNSS

July 1, 2015By
Figure 1. Example of the GNSS signal propagation using ray-tracing and a 3D building map.

A particle-filter-based positioning method using a 3D map to rectify the errors created by multipath and non-line-of-sight signals on the positioning result delivered by a low-cost single-frequency GPS receiver takes a multi-GNSS approach, using the combined signals of GPS, GLONASS and QZSS. The method outperforms conventional positioning in availability and positioning accuracy. It will likely be fused with other sensors in a future pedestrian navigation application. read more