Skip to content

Archives

Low-Complexity Spoofing Mitigation

December 1, 2011 - By

Most anti-spoofing techniques are computationally complicated or limited to a specific spoofing scenario. A new approach uses a two-antenna array to steer a null toward the direction of the spoofing signals, taking advantage of the spatial filtering and the periodicity of the authentic and spoofing signals. It requires neither antenna-array calibration nor a spoofing detection block, and can be employed as an inline anti-spoofing module at the input of conventional GPS receivers. read more

This article is tagged with , , and posted in OEM

On the Edge: Go Big Green

December 1, 2011 - By

Nav On Time, a French Company located in Toulouse, has successfully completed a trial campaign of its Mow-By-Sat precision guidance on a commercial lawnmower. In August, the prototype of a GPS-guided robot lawnmower was installed on a golf driving range near Toulouse and tested in real conditions of use, day and night, maintaining a 25,000 square meter lawn since then. In a previous campaign, the mower covered more than 2.2 million yards — equal to1,250 miles or 2,000 kilometers — in 2,100 hours. (See videos of the mower in action at www.youtube.com/DSnavontime.) read more

This article is tagged with , , and posted in Machine Control/Ag, UAV/UGV

Letters to the Editor: The Cost of Reliability

December 1, 2011 - By

Letters to the Editor: The Cost of Reliability read more

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

The System: EGNOS Toolkits Enhance GPS Accuracy

December 1, 2011 - By

EGNOS Toolkits Enhance GPS Accuracy Free downloadable software Toolkits at www.egnos-portal.eu can help cell-phone and handheld receiver developers enhance location and timing applications with GPS corrrection data from the European Geostationary Navigation Overlay Service (EGNOS) satellite-based augmentation system. The Toolkits include software packages, demo applications, and supporting materials, enabling application developers, researchers, university students, and others to create, use, and... read more

This article is tagged with , , , , , , and posted in GNSS

Expert Advice: MSS Misinformation, and Ten Truths

December 1, 2011 - By

LightSquared is currently conducting a public campaign intended to persuade federal regulators to approve a nationwide broadband service that would be detrimental to users and applications that depend on GPS. The campaign relies on misinformation, revisionist history, half-truths, and clear misstatements of fact. To understand the effort to convince regulators and legislators that the experts are wrong, one must consider 10 basic truths. read more

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

Out in Front: Feds Playing Footsie

December 1, 2011 - By

I’ll be the first to say that I don’t know how Washington works. I don’t know if Washington works, but that’s another story. Lacking that knowledge, and a competent lawyer to pepper my filings with the requisite “Vaughn v. Rosen, 484 F.2d 820 (D.C. Cir. 1973), cert. denied, 415 U.S. 977 (1972) . . . claims of nonsegregability must be made with the same degree of detail” language, all my Freedom of Information Act (FOIA) requests for agency communications to the National Telecommunications Administration (NTIA) failed. My FOIA won-lost record stands at 0–7. read more

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

Consumer GPS/GLONASS: Accuracy and Availability Trials of a One-Chip Receiver in Obstructed Environments

December 1, 2011 - By

A one-chip multiconstellation GNSS receiver, now in volume production, has been tested in severe urban environments to demonstrate the benefits of multiconstellation operation in a consumer receiver. Bringing combined GPS/GLONASS from a few tens of thousands of surveying receivers to many millions of consumer units, starting with satnav personal navigation devices in 2011, followed by OEM car systems and mobile phones, significant shifts the marketplace. The confidence of millions of units in use and on offer should encourage manufacturers of frequency-specific components, such as antennas and SAW filters, to enter volume mode in terms of size and price. read more

This article is tagged with , , , , and posted in OEM

The Business and Product Showcase — December 2011

December 1, 2011 - By

Download the PDF of The Business and Product Showcase sections from the December 2011 issues here. read more

This article is tagged with , and posted in From the Magazine
« Previous Page