Patent ID: 6925108
Filing Date: 2005-08-02
Classification: G01S,H04B,H04L

Abstract:
1. A method for identifying a phase of an incoming ultra wide bandwidth signal at an ultra wide bandwidth receiver, comprising the steps of: receiving incoming pulses of the incoming ultra wide bandwidth signal, adjacent pulses of said incoming pulses arriving at a fixed interval; generating local pulses at the ultra wide bandwidth receiver; correlating the local pulses with the incoming pulses to produce a correlation function; and determining a maximum of the correlation function; wherein the incoming pulses are at least one of bi-phase modulated and quadrature phase modulated, wherein the step of determining a maximum of the correlation function comprises: finding a first maximum over a first phase range; analyzing the correlation function to find a second maximum that exceeds the first maximum; and searching a region around the second maximum over a second phase range to determine if the second maximum is a true maximum, wherein the second phase range is narrower than the first phase range.