SITE DIVERSITY COMMUNICATION SYSTEM

摘要

PURPOSE:To prevent skipping of phase shift due to the switching of site diversity by putting transmitted signal in phase through delay in normal operation. CONSTITUTION:A signal SAA transmitted from a global station A for the station A considerably lags a signal SA to be transmitted, and the signal SA passes through a ground communication path LN1 from a switch SW3 to reach a switch SW2; when it becomes a signal SAB transmitted from a global station B for the station A, control is normally exercised in such a way that the signals SAA and SAB are in phase with each other. If a communication state between the station B and a communication satellite becomes inferior, the control circuit CNT of the station B changes all switches SW1-SW3 of the station over to the side A and also sends a control input signal C to the control circuit CNT of the station A through a ground communication path LN2. Then, the control circuit CNT of the station A controls the radio equipment TCVR of the station A to start the transmission of a signal SBA from the station A for the station B.