Patent ID: 6272350
Filing Date: 2001-08-07
Classification: H04B

Abstract:
A method comprising:receiving an incoming signal comprising at least one multipath component of a signal transmitted by a wireless terminal in an RF environment;performing a time/frequency analysis on the incoming signal, including comparing a set of waveforms corresponding to frequency components of the incoming signal to a set of waveforms corresponding to expected frequency components of the transmitted signal, to identify a time-of-arrival of a line-of-sight component of the incoming signal; andidentifying a first instant in time at which said set of waveforms corresponding to frequency components of the incoming signal substantially match said set of waveforms corresponding to frequency components of the signal transmitted by the wireless terminal, said first identified instant in time thereby being the time-of-arrival of the line-of-sight component of the incoming signal,wherein said set of waveforms corresponding to frequency components of the incoming signal substantially matches said set of waveforms corresponding to frequency components of the signal transmitted by the wireless terminal when a number of matching corresponding waveforms from the two sets meets or exceeds a threshold.