Patent ID: 7962150

Claim:
An ultra-wideband wireless time-of-flight-ranging and network position estimation method, comprising: transmitting a first encoded ultra-wideband query; transmitting a second encoded ultra-wideband query; subtracting out common signals produced from replies to said first and said second encoded ultra-wideband queries so as to result in one or more desired reply signals; statistically filtering time of flight information resulting from said desired reply signals so as to produce a plurality of one or more range measurements; transforming said one or more range measurements into a desired coherent one or more range measurements; introducing a respective bias correction to said coherent signals; and calculating a true position estimate of a line-of-sight (LOS) or a non-line-of-sight (NLOS) transmission channel target as a result of processing a predetermined collected number of said filtered and corrected said plurality of range measurements.