| 摘要 |
PURPOSE:To improve the privacy of information by providing a transmission system for trickery having a different frequency hopping pattern in addition to a basic transmission system for information transmission and sending an information transmission wave and a trickery transmission wave simultaneously. CONSTITUTION:A trickery transmission system is provided in a transmission system 1 in addition to a basic transmission system for information transmission, a code section of the transmission system for information transmission is used as a master and a trickery code section 5A generating a frequency hopping pattern FH-2 different from a frequency hopping pattern FH-1 generated by the code section 5 is provided. Then the information transmission wave and the trickery transmission wave being outputs of a spread spectrum modulation section 4 and a trickery spread spectrum modulation section 4A are sent from an antenna 6 simultaneously. Thus, the decoding of the frequency hopping pattern FH-1 for information transmission is made difficult and the loss of the privacy of the information is avoided. |
