초록 ▼

The position of a Wireless Transceiver (WT) is estimated using the Time Of Arrival (TOA) at several Monitoring Sites (MS) of the signal transmitted by the WT. Several sites are used to solve for the coordinates of the WT using hyperbolic trilateration. A time reference is used to synchronize the Mon

The position of a Wireless Transceiver (WT) is estimated using the Time Of Arrival (TOA) at several Monitoring Sites (MS) of the signal transmitted by the WT. Several sites are used to solve for the coordinates of the WT using hyperbolic trilateration. A time reference is used to synchronize the Monitoring Sites (MS). Super-Resolution (SR) techniques are applied to increase the resolution of the TOA estimate obtained via correlation of the received signal at each MS. SR techniques can improve the TOA resolution substantially.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A wireless location system comprising:a plurality of monitoring stations (MS) and a central site (CS);each monitoring station including (a) a transceiver for monitoring a signal s(

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A wireless location system comprising:a plurality of monitoring stations (MS) and a central site (CS);each monitoring station including (a) a transceiver for monitoring a signal s(t) transmitted from a wireless transmitter and generating an estimate of the time of arrival (TOA) of the received signal relative to a time reference using an inverse transform whose resolution is greater than Rayleigh resolution and (b) a communication link to transmit the estimated TOA from the monitoring station to the central site; andthe central site including (a) a difference unit that computes the time difference of arrival (TDOA) between each estimated TOA and a preselected TOA and (b) a position estimator which processes all TDOAs and generates an estimate of the position of the wireless transmitter.