Patent ID: 6281834
Filing Date: 2001-08-28
Classification: G01S,H04W,Y02D

Abstract:
A method for calibrating and correcting for a station bias in a receiver system employed in a wireless location system (WLS), the receiver system comprising an antennae array, a filter, cabling coupling the filter to the antennae array, and a wideband receiver operatively coupled to the filter, said station bias defined as the finite delay between when an RF signal from a mobile transmitter reaches the antennae and when that same signal reaches the wideband receiver, comprising the steps of: measuring the length of cable from the antennae to the filter and determining the corresponding delay associated with the cable length; injecting a known signal into the filter and measuring the delay from the filter input to the wideband receiver; combining the delays and using the combined delays to correct subsequent location measurements.