From the Magazine

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

This article is tagged with and posted in Automotive, From the Magazine, Road

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

This article is tagged with and posted in From the Magazine, LBS/Wireless, Signal Processing, Wireless Infrastructure

Making Europe’s Seaways Safe for eNavigation

April 1, 2013By
28 days worth of ship-traffic data for the Strait of Dover.

An overview of the work of the General Lighthouse Authorities of the United Kingdom and Ireland on the implementation of Enhanced Loran Initial Operational Capability (IOC) in the waters around Great Britain. eLoran is the latest in the longstanding and proven series of low-frequency, LOng-RAnge Navigation systems. It evolved from Loran-C in response to the 2001 Volpe Report on GPS vulnerability. It vastly improves upon previous Loran systems with updated equipment, signals, and operating procedures. read more

Innovation: Interfacing Clearly

April 1, 2013By
Innov-opener

A New Approach to the Design and Development of Global Navigation Satellite Systems
In this month’s column, a team of authors affiliated with the Galileo project discusses the Interface Communication Modeling Language, an extension of UML that allows engineers to clearly represent SIS interfaces, critical for the design of GNSS receivers. read more

This article is tagged with and posted in From the Magazine, Galileo, GNSS, Innovation

EGNOS and Galileo Track Dangerous Goods

April 1, 2013By
EGNOS-Opener

EGNOS availability over Europe, as a precursor of Galileo globally, provides a guaranteed level of positioning accuracy in real time, for tracking vehicles transporting hazardous material. The EGNOS Open Service enhances position accuracy compared to GPS-only. The EGNOS Data Access Service further enhances accuracy and indicates the quality of the position data received from GPS. As a result of the SCUTUM project, EGNOS is now used in the operational transport of dangerous goods by road in Europe. read more

This article is tagged with and posted in Augmentation & Assistance, Fleet Management, From the Magazine, Road

Building a Wide-Band Multi-Constellation Receiver

March 1, 2013By
G-opener

The authors designed a full-constellation GNSS receiver, using a cost-effective, readily available, flexible front-end, wide enough to capture the frequency from 1555 MHz to 1607 MHz, more than 50MHz. This spectrum width takes into account BeiDou E2, Galileo E1, GPS L1, and GLONASS G1. In the course of their development, the authors used an external OCXO oscillator as the reference clock and reconfigured the platform, developing their own custom wide-band firmware. read more

Showing Smartphones the Way Inside

March 1, 2013By
opener_v2_4C

Using a select set of components, a navigation software development kit can easily be configured to fit a variety of mobile and portable devices. Testing on several current devices demonstrates that the kit’s use of sensors already present in smartphones to enable entertainment can provide 3D positioning when satellite signals are degraded or absent, such as in urban canyons or in deep indoor environments. The solution also provides the heading of the user, the 3D orientation of the device, and the user’s velocity, without restriction on device usage. read more

This article is tagged with and posted in From the Magazine, Personal Navigation

Innovation: A Better Way

March 1, 2013By
In-opener

Monitoring the Ionosphere with Integer-Leveled GPS Measurements
II am joined by two of my graduate students, who report on an advance in the signal processing procedure for better monitoring of the ionosphere, potentially allowing scientists to get an even better handle on what’s going on above our heads. read more

This article is tagged with and posted in From the Magazine, Innovation