초록 ▼

The invention comprises a portable locating unit useful both as a cellular telephone and portable global positioning system that provides latitude and longitude information remotely to a base unit display. The system includes a small hand held receiver that receives signals from a satellite global p

The invention comprises a portable locating unit useful both as a cellular telephone and portable global positioning system that provides latitude and longitude information remotely to a base unit display. The system includes a small hand held receiver that receives signals from a satellite global positioning system and timing and computing circuits to provide location information signals. The hand held unit also includes a modem and transmitter to a cellular telephone network which is connected to the base unit computational system and display. The location of an individual or object can thus be determined at the remote station through the use of the cellular telephone network.

대표청구항 ▼

A cellular position locating system for locating the geographical coordinates of a person at a remote location using a portable hand held remote unit and a cellular telephone system comprising: receiver means for receiving navigational signals from satellites in orbit about the earth; signal process

A cellular position locating system for locating the geographical coordinates of a person at a remote location using a portable hand held remote unit and a cellular telephone system comprising: receiver means for receiving navigational signals from satellites in orbit about the earth; signal processing means for demodulating the satellite navigationals signals; means for generating a pseudo random code; timing means connected to said signal processing means demodulating means and said signal processing means; means for generating position information signals by comparing the time difference of the navigational signals and the pseudo random code signals; means for converting said position information signals into cellular telephone signals; cellular telephone signal transmitting means; cellular telephone system for receiving and transmitting said transmitted cellular telephone signals; base unit means coupled to said cellular telephone system for processing cellular telephone signals received from said cellular transmitter; said base unit means including means for decoding the received signal for determining geographic location position data; and a display means connected to said base unit for displaying the geographical coordinate information.