Radio repeater

Abstract

Abstract PURPOSE:To attain a nonlinear compensation by providing a predistortion nonlinear compensating circuit before or after two input ports of a power distributer in relay amplifiers operated in parallel between the power distributer and a power multiplexer. CONSTITUTION:In amplifying an outgoing line pilot signal from a pilot signal oscillator 117 by amplifiers 106, 104 simultaneously, an intermodulation distortion component generated in the amplifiers 106, 114 and multiplexed by the power multiplexer 161 is detected by an outgoing line signal level detector 119. Then the amplitude and phase of the distortion component injected from the pre- distortion nonlinear compensation circuit 105 to the amplifier 106 and from a nonlinear characteristic controller 123 to the amplifier 114 are controlled automatically by the controller 123 to minimuze the distortion component. The incoming line pilot signal is processed nearly similarly.

Inventors

• 👤 Tetsuo Hanazawa
• 👤 花沢　徹郎
• 👤 Hitoshi Odate
• 👤 大舘　均
• 👤 Toshio Suzuki
• 👤 俊雄 鈴木

Bibliographic Details