Calibration for wireless location system

Details Calibration for wireless location system Calibration for wireless location system

G - Physics

01

S

G01S 1/24 (2006.01) H04Q 7/34 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2494886

An internal calibration method may be employed to mitigate the effects of transfer function variations on subsequent time measurements, in a wireless location system. The inventive method includes the steps of injecting a stable, known wideband signal into a receiver system of the wireless location system; using the wideband signal to estimate the transferfunction across a prescribed bandwidth of the receiver system; and using the estimate to mitigate the variation of the transferfunction on subsequent time measurements. The wideband signal maybe a comb signal characterized by multiple discrete frequencies and consistent amplitude and spacing between the discrete frequencies, and the estimate of the transfer function may be weighted by a quality factor prior to mitigation of the effects of the transfer function.

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