Design & Test

How to Survive a Total Constellation Outage

April 3, 2014By
Broadcom-O3

Yesterday we posted news of an 11-hour downtime for the full GLONASS constellation, due to an upload of bad ephemerides. Coincidentally, during that 11-hour period, the mass-market chip company Broadcom was conducting multi-constellation receiver tests in Asia. Frank van Diggelen, Broadcom’s chief GNSS scientist and vice president says, “We have definitive data to show how a multi-constellation receiver survives such... read more

Innovation: Ground-Based Augmentation

April 2, 2014By
FIGURE 5. Research aircraft D-IBUF (Dornier Do 128-6).

Combining Galileo with GPS and GLONASS
While a GPS-based GBAS will offer improved navigation services for aircraft, might these services be even better if the systems were to use satellites from other constellations besides GPS? In this month’s column, the authors show how GBAS protocols might be modified to accommodate multiple constellations, offering results of preliminary tests using GPS, GLONASS, and Galileo simultaneously. read more

A Mass-Market Galileo Receiver

April 1, 2014By
mass-market-galileo-rx-O

Its Algorithms and Performance
The authors test three mass-market design drivers on a chip developed expressly for a new role as a combined GPS and Galileo consumer receiver: the time-to-first-fix for different C/N0, for hot, warm, and cold start, and for different constellation combinations. read more

Vector Signal Generator Covers BeiDou

March 31, 2014By
SMBV100A_GNSS_front-W

The R&S SMBV100A vector signal generator can generate Galileo, GPS, and GLONASS signals for up to 24 satellites in real time. With the SMBV-K107 option, the simulator covers the BeiDou standard as well. The R&S SMBV-K101 option allows developers in the automotive and wireless communications industries to test GNSS receivers for specific effects such as obscuration and multipath propagation. If... read more

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Spirent Launches Advanced Simulator for Multi-GNSS Testing

March 31, 2014By
GSS9000a-Spirent-O

Spirent Communications, provider of testing solutions for positioning and navigations systems, has introduced the Spirent GSS9000 Multi-Frequency, Multi-GNSS RF Constellation Simulator. The GSS9000 offers a new benchmark in performance, capability and flexibility that includes the ability to simulate signals from all GNSS and regional navigation systems. The GSS9000 offers new levels of performance, enabled by a four-fold increase in RF... read more

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Spectracom Begins Program for Application-Specific Testing

March 6, 2014By
Spectracom’s GSG-6 Simulator with monitor.

Spectracom has begun a program to develop robust application-specific testing solutions. The program fills what the company calls a technology and expertise gap in providing customers in a variety of industries the tools to perform more comprehensive qualification of their mission-critical systems. Examples of these industries include: multi-constellation (GPS, GLONASS, Galileo, BeiDou) simulation; integrated MEMs/INS testing; interference detection and mitigation... read more

2014 Simulator Buyers Guide

March 1, 2014By
GSG_Family-SPECTRACOM-W

In GPS World’s annual Simulator Buyers Guide, we feature simulator tools, devices, and software from six prominent companies. Also available as a downloadable PDF. read more

Spirent’s SimSAFE Fights Signal Vulnerability

March 1, 2014By

By Tracy Cozzens Spirent Communications now offers SimSAFE, a software solution that simulates legitimate GNSS constellations along with spoofed or hoax signals to evaluate receiver resilience and help develop counter measures. Hoax or spoofing attacks work by mimicking genuine GNSS signals, which mislead GNSS receivers.  The military and critical infrastructure — such as wireless networks, banking, and utilities — are especially... read more