Measuring channel length involves base station separating comparison signal from response from transponder to request, deriving channel length from phase comparison or time difference

摘要

The method involves sending a request signal (sig1) from at least one base station (BS) to at least one transponder (TR) and receiving it at the transponder, which modulates it onto a bearer signal and sends the resulting signal (sig4) back to the base station, which separates out a comparison signal (sig5) and determines channel length from a phase comparison or time difference. Independent claims are also included for the following: a base station, a method of remote identification and a system for channel length measurement.