| 摘要 |
PURPOSE:To remove interference due to unnecessary wave efectively by combining antenna output passed through an equalizer and antenna output not passed through the equalizer, demodulating, detecting error rate and controlling the equalizer according to the result. CONSTITUTION:Amplitude and phase of a received signal from an antenna 1 is controlled by an equalizer 5 constituted of an amplitude adjuster 4. The signal and a received signal from another antenna 2 are combined by a composing device 6 to obtain differential composite output. This composite signal is demodulated by a demodulator 7, and frame error rate of the demodulated signal is detected and measured by a frame error detector 8. The result is added to a controller 9. The controller 9 controls an amplitude adjuster 3 of the equalizer 5 and a phase adjuster 4 to make the frame error rate minimum or less than predetermined value. |
