Helicopter satellite communications manner, through the helicopter on-board communication device and the terrestial station

摘要

PROBLEM TO BE SOLVED: To provide a helicopter satellite communication method which allows reception of a burst signal intermittently transmitted from a helicopter while avoiding interruptions due to rotary wings and is superior in confidentiality of data, and also to provide a helicopter-mounted communication device, and a ground station communication device.;SOLUTION: A first UW signal 35, a second UW signal 36, and a third UW signal 37 are added respectively to a head portion, a continuous portion, and an end portion of the transmission burst signal which is intermittently transmitted from the helicopter-mounted communication device while avoiding interruptions due to rotary wings. In reception processing of the ground station communication device, the first UW signal 35 becomes a start signal of demodulating operation, and the third UW signal 37 becomes a stop signal of demodulating operation. The second UW signal 36 shows a delimiter of one frame of data 38, and demodulated data 38 is processed by frame in reception signal processing.;COPYRIGHT: (C)2011,JPO&INPIT