ONE WAY TIME OF FLIGHT DISTANCE MEASUREMENT

摘要

Determination of distance and/or position relative to one or more points by transmission of a wideband signal by a first antenna, reception of the transmitted wideband signal by a second antenna and comparison of the time delay between the transmitted and received signals. The first and second antennas are connected to a timer/processor unit. One or more of the first or second antennas is movable to an unknown position to be measured, but maintains connection to the timer/processor through a fixed or known delay communication link. The timer/processor contains a time base for generating the transmitted signal and an offset timer for measuring the time delay of the received signal. The received signal may be processed to determine a start time or leading edge that may resolve RF cycle and modulation bandwidth ambiguities and may allow positive determination of distance much shorter than a wavelength at the operation center frequency.