| 摘要 |
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. |
