Highly Accurate Multipath Component Delay Estimation

Positioning for mobile radio systems has been on the agenda of 5G and new radio (NR) study and working items for many 3GPP Releases. Several methods like those based on observed time differences of arrival or based on relative round trip time measurements have been discussed or standardized with the goal to gradually enhance the localization accuracy. New - partly stringent - requirements have been identified for new use cases, for example, with respect to industry 4.0 campus scenarios. Controlling of specific manufacturing machines would need a sub millimeter accuracy, which is far beyond the current precision of NR systems. In a first step, we will evaluate the benefits of parameter estimation schemes for accurate delay and distance estimation. Then, we propose a so called ping pong scheme, which allows to improve a certain limited delay estimation accuracy by a factor of N, where N is the number of back and forth transmissions between a certain mobile radio transmitter and receiver station.