Wireless Infrastructure

National Instruments Launches GPS Time-Stamping and Synchronization Module

November 14, 2012By
NI 9467-Natl Instruments

  National Instruments has announced the NI 9467 GPS synchronization module, which accurately synchronizes a large-scale CompactRIO system with features such as data time-stamping and system clock setting. The NI 9467 is one of six new C Series modules designed for NI CompactRIO embedded control systems and NI CompactDAQ modular data acquisition systems. By expanding the C Series platform, NI... read more

This article is tagged with and posted in Latest News, Timing, Wireless Infrastructure

Symmetricom Introduces Small Cells Category to SyncWorld Ecosystem Program

November 14, 2012By

Symmetricom, Inc., today launched a new small cells-focused category within its SyncWorld Ecosystem Program. Developed to support the integration with Symmetricom’s SCr/SCe NTP/ PTP and sGPS SoftClocks and interoperability between Symmetricom Grandmaster clocks and other small cells solutions, the category aims to facilitate validated deployments of timing and synchronization with various small cells products in 3G and 4G/LTE architectures. Current... read more

This article is tagged with and posted in Timing, Wireless Infrastructure

Tip Line Encourages Public Participation in the Fight Against GPS Jammers

November 2, 2012By

Washington, D.C. — The Federal Communications Commission’s Enforcement Bureau today launched a dedicated jammer tip line – 1-855-55-NOJAM (or 1-855-556-6526) – to make it easier for the public to report the use or sale of illegal GPS, cell phone or other signal jammers. It is against the law for consumers to use, import, advertise, sell or ship a GPS or... read more

Going Up Against Time: The Power Grid’s Vulnerability to GPS Spoofing Attacks

August 1, 2012By
Figure 7. Oscilloscope and Synchrowave screen at about 870 seconds, point 4 in Figure 3.

Spoofing tests against phasor measurement units demonstrate their vulnerability to attack. A generator trip in an automatic control scheme could be falsely activated by the GPS spoofing, possibly leading to cascading faults and a large-scale power blackout. read more

This article is tagged with , , and posted in Timing, Wireless Infrastructure

Detecting False Signals with Automatic Gain Control

April 1, 2012By
FIGURE 6. Google Earth view of testing environment.

A component of most GPS receiver front-ends, the automatic gain control (AGC) can flag potential jamming and spoofing attacks. The detection method is simple to implement and accessible to most GPS receivers. It may be used alone or as a complement other anti-spoofing architectures. This article presents results from a baseline AGC characterization, develos a simple spoofing detection method, and demonstrate the results of that method on receiver data gathered in the presence of a live spoofing attack. read more

Calculating Time-to-First-Fix

November 1, 2011By
Figure 5. Indoors signal strength (C/N0) for satellite PRN09. Each colored curve represents the signal strength measured on a different day, starting at the same orbital time.

Cell-phone users are often more concerned about the speed of positioning than the accuracy, making time-to-first-fix the most important factor in a GNSS mass-market receiver’s perceived performance. However, TTFF is generally difficult to characterize and optimize because of the need to encompass a wide range of environments, including indoors. read more

This article is tagged with and posted in Indoor Positioning, Wireless Infrastructure

Expert Advice: Exploring the Technologies Behind Location-Gate

September 1, 2011By

For the past several months, controversy has raged over the revelation that Apple and Google tracked mobile subscriber location movements and stored that information in an unencrypted file on the handset, where it was potentially vulnerable to hacking and other inappropriate usage. The resulting Location-gate scandal highlights the sometimes tenuous control of mobile subscriber information versus the business objectives of dominant platform and applications providers. These business objectives may include immediate revenue opportunities from the subscriber being tracked or broader self-interest initiatives, such as collecting marketing data that may be valuable to third parties like advertisers, or building subscriber-reported Wi-Fi access point databases. read more

EGNOS Gets to Work

February 1, 2011By
Figure 6. Time series of horizontal positioning errors for stand-alone GPS, conventional EGNOS, and position domain EGNOS solutions at HUEG IGS station.

GPS corrections from the European Geostationary Navigation Overlay Service can improve the positioning accuracy and user experience of GPS-enabled mobile phones, even if EGNOS satellites are not visible and even when the GNSS chipset in the phone does not support satellite-based augmentation systems. read more

This article is tagged with , and posted in Augmentation & Assistance, Mobile Devices, Wireless Infrastructure