| 摘要 |
A method for indoor navigation is disclosed. The method comprises the following steps: (a) disposing a plurality of ground transceivers in proximity of an indoor area to be navigated through; (b) transmitting from each of the ground transceivers a pseudo-satellite signal which includes positional coordinates of the ground transceiver and an assigned PRN code sequence modulated on an L-band carrier signal having a frequency approximately equal to an L1 frequency of global positioning system (GPS) satellite signals, the assigned PRN code sequence being different from PRN code sequences that are included in GPS satellite signals; (c) receiving the pseudo-satellite signals with a receiver circuit of a mobile GPS receiver, the receiver circuit including a code generator circuit for producing internal PRN code sequences; (d) comparing the internal PRN code sequences with PRN code sequences included in the pseudo-satellite signals to derive decoded pseudo-satellite signals, using a decoder circuit of the mobile GPS receiver; (e) processing the decoded pseudo-satellite signals using a processing circuit of the mobile GPS receiver; and (f) deriving positional coordinates of the mobile GPS receiver from the processed decoded pseudo-satellite signals.
|
