抄録
The wireless communication is one of important information transfer system in the present day life. The wireless communication can easily construct anytime and anywhere. However, this method receives interference by various phenomena. We shall reports in this time that quasi-periodic phenomenon is seen in the television broadcasting signals on VHF and UHF. This phenomenon is generated by coming flight of the airplane. We observed this phenomenon in Bangkok, Thailand and Kanagawa, Japan. And this phenomenon can calculate on various conditions. The calculation results can explain interference structure accompany many characteristics.
