Compensation techniques for doppler effect in UWB-based rotor-telemetry system

This paper covers a new scenario based on UWB-technique for transmission of data, which is the rotor-telemetry. The rotor-telemetry is a special type of a radio-telemetry, where measuring data of physical parameters like pressure or temperature are captured by sensors predominantly on rotating objects such as shafts or gear parts, transmitted over special on the rotor mounted along-moved antennas and received by static antennas. A new problem appears with this scenario: since the rotor moves fast, the impact of Doppler rises significantly. In this paper we will first analyze the Doppler effect mathematically, then we will give a short overview about techniques, how to estimate the frequency dependent Doppler shift of the UWB-signal and finally we will focus in detail on techniques to compensate the Doppler effect caused by very fast rotation speed.