Integrated Nav with Software-Defined Radio
Nov 1, 2006
|
A networked radionavigation approach that augments GPS signals with time-of-arrival observations using a software-defined radio can overcome attenuation, and often complete blockage, of GPS inside buildings or in urban canyons. The SDR can operate both as a GPS receiver and also as a 900 MHz transceiver operating within the ISM band. Applications for this technology include firefighters and other first responders, and military operations in urban terrain.  Receiver Frequency Standards
Nov 1, 2003
By:
Larry D. Vittorini, Brent Robinson
|
GPS was never intended for indoor environments, and indeed, the relatively weak satellite signals do not readily lend themselves to use in such environments. The Federal Communications Commission's E911 mandate has spurred significant effort in the GPS community to apply its combined expertise to solve this dilemma. Nov 1, 2001
By:
Changdon Kee, Doohee Yun, Haeyoung Jun, Bradford Parkinson, Sam Pullen, Tom Lagenstein
|
Pseudolites enable GPS navigation in indoor environment. This article continues our series on the "one-chip challenge," the effort to reduce the physical parameters of GPS receiver technology to accommodate its integration into an ever-wider variety of platforms, products, and systems - particularly portable devices. Written by engineers at a GPS company focusing on cellular telephone markets, the article describes a receiver architecture that employs a large number of signal-processing correlators to increase the sensitivity of user equipment to the point that..
Sep 1, 2001
By:
Frank van Diggelen, Charles Abraham
|
Location-enabling cell phones will increase demand for GPS by over one hundredfold. This article continues our series on the "one-chip challenge," the effort to reduce the physical parameters of GPS receiver technology to accommodate its integration into an ever-wider variety of platforms, products, and systems - particularly portable devices. Written by engineers at a GPS company focusing on cellular telephone markets, the article describes a receiver architecture that employs a large number of signal-processing correlators to increase the sensitivity of user equipment to the point that..
Sep 1, 2001
By:
Charles Abraham, Frank van Diggelen
|
Location-enabling cell phones will increase demand for GPS by over one hundredfold.
| 
