INTERFERENCE SUPRESSION IN TELEVISION SIGNALS USING AN LMS ADAPTIVE ARRAY ANTENNA.

Abstract

Interference sometimes causes serious television signal reception problems. An example of this is a broadcasting signal from a foreign country being reflected by a sporadic E layer and jamming television signals in Japan. This paper describes an experimental study of interference suppression using an LMS adaptive array antenna. In the study, simulator for the LMS adaptive array antenna is constructed. Then, desired television signal and an undesired signal are input together into the simulator. The following is a typical result of the study. Even when the picture quality is bad at the input, it is almost the same as a desired television picture at the simulator output. In such a case, the input and output DURs are 18. 8 db and 48. 6 db, respectively. From the experiments, it is concluded that the LMS adaptive array antenna is effective in suppressing television signal interference.