초록 ▼

A global positioning system (GPS) and auxiliary receiver receive limited range position signals broadcasted from telemetry transmitters when in an urban canyon environment. The limited range receivers preferably are implemented as part of the lighting infrastructure of the environment. The limited r

A global positioning system (GPS) and auxiliary receiver receive limited range position signals broadcasted from telemetry transmitters when in an urban canyon environment. The limited range receivers preferably are implemented as part of the lighting infrastructure of the environment. The limited range receivers derive power from light from the lighting infrastructure. The receivers can also include a transmitter for retransmitting the receive position data and an ID code to a central processing center.

대표청구항 ▼

[ What is claimed is:] [1.] An extended capability global positioning system comprising:a plurality of transmitters disposed at a plurality of positions for transmitting limited range position signals indicative of the plurality of positions;a lighting infrastructure whereon the plurality of transmi

[ What is claimed is:] [1.] An extended capability global positioning system comprising:a plurality of transmitters disposed at a plurality of positions for transmitting limited range position signals indicative of the plurality of positions;a lighting infrastructure whereon the plurality of transmitters are disposed; anda positioning receiver for receiving GPS signals from the global positioning system for determining a positioning receiver first position in response to the GPS signals, for receiving a limited range position signal from a transmitter in the plurality of transmitters for obtaining a positioning receiver second position in response to the limited range signal indicative of a known transmitter position, and for selecting the positioning receiver second position when the GPS signals are not being accurately received.