Globally referenced positioning in a shielded environment

摘要

A method, apparatus and system for globally referenced positioning in a shielded environment includes integrating and correlating information from a UWB receiver, a GPS receiver, and a bent-path GPS receiver adapted to extract a GPS radio frequency wave from a heterodyned GPS signal. The method, apparatus, and system is resistant to interference and can be used in a shielded environment such as indoors or behind a line-of-sight barrier.

主权项

1. An apparatus for determining position that is resistant to interference and capable of use within a shielded environment comprising:
a UWB receiver; a GPS receiver; a bent-path GPS receiver; a GPS re-radiation antennae position outside the shielded environment, said antennae configured to remove biases introduced by different ionospheric conditions, magnetic fields when using a single satellite signal; an intelligent control operatively connected to the UWB receiver, the GPS receiver, and the bent-path GPS receiver; the bent-path receiver adapted to receive a heterodyned GPS signal comprising a GPS radio frequency wave and a wave of a different frequency, and to deheterodyne the heterodyned GPS signal to extract the GPS radio frequency wave; the intelligent control adapted to determine a globally referenced position at least partially based on integrating and correlating ultra wideband data received from: the UWB receiver, GPS data received from the GPS receiver, and/or GPS data received from the bent-path GPS receiver; wherein the GPS re-radiation antennae is capable of transmitting GPS signals onto multiple wireless radio frequency carriers simultaneously, or in a center channel frequency hopping mode in order to reduce the possibility of having the GPS heterodyned signals jammed or spoofed.