METHOD FOR HELICOPTER-SATELLITE COMMUNICATION, AS WELL AS, HELICOPTER-CARRIED COMMUNICATIONS EQUIPMENT USED FOR THE SAME AND GROUND STATION COMMUNICATIONS EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To obtain a method for helicopter-satellite communication which estimates with high accuracy transmission timing that prevents rotary blades of a helicopter from shutting off a communication path and is superior in a band utilization efficiency, in transmission from a ground station to the helicopter, and to obtain helicopter-carried communication equipment used for the method and ground communications equipment.;SOLUTION: The helicopter-carried communications equipment 9 uses an antenna 7 for millimeter-wave zone to detect reflection of millimeter waves caused by the rotary blades. A transmission timing estimating part 14 estimates shut-off timing and estimates the transmission timing. The ground communications equipment 10 transmits a burst transmission request signal to the helicopter and receives a burst response signal. Transmission timing of the helicopter-carried communications equipment 9 is detected from the received burst response signal, and transmission timing for performing transmission to the helicopter-carried communications equipment 9 is estimated by taking into consideration a propagation delay of a communication signal between the helicopter 1 and a ground station 3.;COPYRIGHT: (C)2009,JPO&INPIT