SPECIAL COMMUNICATION SYSTEM

摘要

PURPOSE:To give an effective threat to an opposite communication system by transmitting communication by A1 modulation of an received opposite party while delaying it optionally. CONSTITUTION:A communication signal of the A1 modulation system of the received opposite party by a reception antenna 1 used in the special communication system is demodulated by a receiver 2 and a demodulator 3. The demodulated A1 signal is fed to a random delay device 8 so as to retard the signal for a random time. The delayed A1 signal is modulated by a modulator 5 and a transmitter 7 so as to transmit a transmission signal giving an effective threat to the opposite communication system of the A1 modulation system through a transmission antenna 6. Further, the transmitted delay time is selected at random or as a constant delay time. Moreover, disturbing transmission is performed at small pause periods of transmitted codes so as to make decoding of codes difficult.