Method and apparatus for locating a mobile station in a spread s

Details Method and apparatus for locating a mobile station in a spread s Method and apparatus for locating a mobile station in a spread s

1996-06-28

1997-10-07

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

455 561, G01S 302

Patent

active

056753446

ABSTRACT:
The method includes receiving (404) by a first base station (212) a signal (215) transmitted from the mobile station (216); demodulating (406) the signal by the first base station (212) to form a demodulated signal; remodulating (408) at least a portion of the demodulated signal to form a reference signal; receiving (412) by the first base station (212) and a second base station (210, 214) a retransmitted signal (217); comparing (414, 16), by the first base station (212), the retransmitted signal (217) with the reference signal to determine a first delay; comparing (414, 416), by the second base station (210, 214), the retransmitted second signal (217) with the reference signal to determine a second delay; and based on the first and second delays, determining (420) a location of the mobile station (216).

REFERENCES:
patent: 5363403 (1994-11-01), Schilling et al.
patent: 5506864 (1996-04-01), Schilling
patent: 5508708 (1996-04-01), Ghosh et al.

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