Self-calibrating reference terminal

Details Self-calibrating reference terminal Self-calibrating reference terminal

1998-12-21

2000-12-26

Tarcza, Thomas H.

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

Directive

Position indicating

342450, 342457, 342463, 342174, 455456, 702 89, G01S 302

Patent

active

061666912

ABSTRACT:
A reference terminal used in positioning/locating of mobile terminals in a radiocommunication system is described. The reference terminal includes a time-of-arrival (TOA) receiver which is used to provide information associated with the location of mobile terminals. The TOA receiver also performs the function of calibrating the time delays within the reference terminal by measuring time delays associated with each time-sensitive component. For example, when the reference terminal transmits an uplink signal burst, e.g., reporting TOA information associated with a particular mobile terminal, a portion of this signal energy can be captured and propagated through antenna cables within the reference terminal. The TOA receiver can be used to determine time delays associated with the returned signal energy through various paths, which delays can be used to calibrate the positioning information generated by the reference terminal.

REFERENCES:
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5608410 (1997-03-01), Stilp et al.
patent: 5717406 (1998-02-01), Sanderford et al.

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