Design & Test

Innovation: GNSS Spoofing Detection

June 1, 2013By

It's a hostile (electronic) world out there, people. Our wired and radio-based communication systems are constantly under attack from evil doers. We are all familiar with computer viruses and worms hiding in malicious software or malware distributed over the Internet or by infected USB flash drives. Trojan horses are particularly insidious. These are programs concealing harmful code that can lead to many undesirable effects such as deleting a user’s files or installing additional harmful software. Such programs pass themselves off as benign, just like the “gift” the Greeks delivered to the Trojans as reported in Virgil’s Aeneid. This was a very early example of spoofing. read more

Rohde & Schwarz, 7Layers Verify Improved Test Method for ECC

May 22, 2013By

Rohde & Schwarz and 7Layers have verified and validated the synchronized test approach to determine the Envelope Correlation Coefficient (ECC), a value characterizing the antenna subsystem of multiple-input and multiple-output (MIMO) LTE devices. The Synchronized ECC approach delivers significantly shorter test durations and repeatable results, ultimately resulting in reduced costs. Long term, this collaboration will also help product manufacturers develop... read more

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RTKLIB Open Source GNSS Precise Positioning Software Supports NV08C Receiver

May 20, 2013By

RTKLIB, a developer of open source software for standard and precise GNSS positioning, has released its latest RTKLIB software (version 2.4.2), which fully supports NVS Technologies’ BINR proprietary binary protocol and the NV08C GNSS receiver series. The use of RTKLIB, in conjunction with NVS Technologies’ NV08C GNSS receiver series, including the highly integrated NV08C-CSM surface mount module with geodetic grade... read more

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ION GNSS+ 2013 Program and Registration Available Online

May 10, 2013By

Registration is now open for the Institute of Navigation (ION) GNSS+ 2013 to be held September 16-20 (tutorials September 16 and 17) at the Nashville Convention Center in Nashville, Tennessee. ION GNSS+ 2013 is the 26th International Technical Meeting of the ION Satellite Division and the world’s largest technical meeting and showcase of GNSS technology, products and services. ION GNSS+... read more

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NVS Technologies Releases Firmware Update for NV08C Receivers

May 2, 2013By

NVS Technologies has released updated firmware for its NV08C receiver series. Firmware v0206 is compatible with current and preceding hardware revisions of the NV08C receiver series. Firmware v0206 can be downloaded free of charge. Firmware v0206 offers: Stabilized raw data output for output rates up to 10 Hz Extended $POUTC NMEA message, including current LEAP SECONDS value, flags for expected UTC... read more

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Innovation: Evil Waveforms

May 1, 2013By

Generating Distorted GNSS Signals Using a Signal Simulator
In this month’s column, our authors discuss a set of GPS and Galileo evil-waveform experiments they have carried out with an advanced GNSS RF signal simulator. Their results will help to benchmark the effects of distorted signals and perhaps lead to improvements in GNSS signal integrity. read more

On the Road under Real-Time Signal Denial

May 1, 2013By
Figure 1 innovITS Advance test circuit (right) and the environment it represents (left).

Emerging GNSS applications in automobiles support regulation, security, safety, and financial transactions, as well as navigation, guidance, traffic information, and entertainment. The GNSS sub-systems and onboard applications must demonstrate robustness under a range of environments and varying threats. A dedicated automotive GNSS test center enables engineers to design their own GNSS test scenarios including urban canyons, tunnels, and jamming sources at a controlled test site. read more

GNSS Test Standards for Cellular Location

May 1, 2013By
Downtown Seattle, a typical test-case environment.

GNSS receivers in cell phones will soon support four or more satellite constellations and derive additional location measurements from other sources: cellular location, MEMS sensors, Wi-Fi, and others. The authors propose test standards covering these sources, meeting industry requirements for repeatable testing while considering the user experience. read more