Archives

ITC Upholds Broadcom Claims, Issues Order Against SiRF

January 16, 2009 - By

The U.S. International Trade Commission (ITC) has issued an exclusion order against certain SiRF GPS chips and products containing those chips imported into the United States, as well as cease-and-desist orders against SiRF and four specific SiRF customers. read more

Survey Perspectives: The Beginning of the Battle

January 6, 2009 - By

This year will be the beginning of the battle between Trimble/Spectra and Topcon/Sokkia with Leica in the fray as well; the companies own 75 percent of the market between them. The other players in this market are going to have be creative in 2009 to remain competitive in the market. read more

This article is tagged with and posted in Newsletter Editorials, Opinions, Survey, Survey Scene

Assessing the Spoofing Threat

January 1, 2009 - By

A portable spoofer implemented on a digital signal processor mounts a spoofing attack, characterizes spoofing effects, and suggests possible defense tactics. GNSS users and receiver manufacturers should explore and implement authentication methods against sophisticated spoofing attacks. read more

This article is tagged with and posted in Public Safety, Security & Surveillance

GNSS Receiver Evaluation

January 1, 2009 - By

This article addresses how best to quantify “which navigation system performs best” in a realistic testing scenario. The methodology focuses on land vehicles navigating in urban environments, but applies equally well to pedestrian navigation and can be adapted for testing assisted-GNSS implementations. During a drive test, the truth-reference system and RF recording system log samples to disk, with no need for the receivers under test to be included during the actual drive. read more