System and method to minimise the impact of the Doppler effect in radio transmission to a mobile device

摘要

A system for radio transmission between a mobile body moving on a track and base stations via a plurality of antennas is described, while the system comprises a controller switching the antennas regularly assembled along the track between an active and a muted state accordingly to the position of the mobile body. The antenna or group of antennas closest to the mobile body are in a muted state. The system is particularly adapted for mobile body in motion in that the antennas are switched by the controller into a muted state when the mobile body is approaching the respective antennas. The radio transmission link to the mobile body is handoff from one antenna to the other switched in an active state such to keep pace with that mobile body. This can be preferably performed ahead i.e. by preceding the mobile body or behind i.e. by following the mobile body.