A Single-Chip GPS Receiver And the Steps to Mass-Market Galileo Oct 1, 2005 By: Philip G. Mattos

As GPS chip volumes per manufacturer reach millions for the automotive market and tens of millions for consumer GPS, the market map for a single-chip GPS changes considerably. The advent of Galileo will bring out the full benefits of sensitivity, creating an opportunity for low-cost, high-integration one-chip solutions.

Time-Invariant Sea-Floor Depths Using the Ellipsoid As Zero-Reference Surface Sep 1, 2005 By: Muneendra Kumar, George A. Maul

A GPS survey combined with acoustic soundings can determine highly accurate sea-floor depths. Using the ellipsoid as the zero-reference surface then allows navigators, while underway, to determine both keel and overhead obstruction clearance independent of the stage of the tide and the draft of the ship and freeboard.

More Bang, Less Buck Low-Cost GPS/INS Guidance for Navy Munitions Launches Sep 1, 2005 By: Dan Coskren, Tim Easterly, Robert Polutchko

A new naval stand-off combat capability demonstrates precision-guidance of long-range, gun-fired projectiles in support of ground maneuver warfare.

Galileo Test User Segment First Achievements and Application Jul 1, 2005 By: Martin Hollreiser, Jean-Marie Sleewaegen, Wim de Wilde, Marco Falcone, Frank Wilms

This article summarizes the first development results of the Galileo system's Test User Segment, including performance tests.

Abreast of the Waves Open-Sea Sensor to Measure Height and Direction May 1, 2005 By: Masatoshi Harigae, Isao Yamaguchi, Tokio Kasai, Hirotaka Igawa, Hiroto Nakanishi, Takahiro Murayama, Yasunori Iwanaka, Hirotaka Suko

A commercial-grade GPS receiver on a buoy measures wave height and direction with centimeter accuracy.

Getting to M Direct Acquisition of the New Military Signal Apr 1, 2005 By: John W. Betz, John D. Fite, Paul T. Capozza

A team with expertise in systems engineering, digital signal processing, and IC design took on the challenge of developing a prototype IC for direct acquisition of the new M-code signal.

The Enemy Inside GPS Jammed by Room, Host, Self Mar 1, 2005 By: Jacqueline Bickerstaff, Marino Phocas, Tony Haddrell

To utilize signals transmitted through or reflected off walls, indoor GPS receivers require sensitivities 20dB below that of older, conventional receivers. At these levels, jamming may come from low-power sources in the room, in the equipment, or in the chipset itself. The authors address these inside sources  arising from co-location of antenna, baseband, and host electronics  producing emissions that readily exceed interference levels, and they offer some design considerations for indoor locatability.

Bird's-Eye View GPS & Micro Aerial Vehicles Oct 1, 2004 By: Peter Vörsmann, Stefan Winkler

Tiny, fast, and cheap, new micro aerial vehicles (MAVs) use GPS for navigation and guidance in civil and military surveillance missions. The bird-sized craft carry a sensor suite including a miniaturized video camera, and can fly indoors as well as outdoors.

A large-scale integrated combined Galileo/GPS receiver chipset for consumer applications focuses on high-sensitivity acquisition.