| 摘要 |
PURPOSE:To perform efficiently diversity synthesis even at the presence of an interference wave or a disturbing wave, by applying a common gain controller at the prestage of a signal processing circuit performing pass band synthesis. CONSTITUTION:If an interference wave or a disturbing wave is applied to any of diversity paths, a subtractor 19 subtracts data after discrimination from data before discrimination in a discriminator 15, outputs a base band component of the interference or the disturbing wave, the output modulates a reproducing carrier supplied from a demodulator 14A by a modulator 18 and the estimated interference or the disturbing wave of the pass band is generated. The output of the modulator 18 is multiplied with an output of pass band amplifiers 111- 11n at correlation circuits 171-17n individually, and the correlation circuits having the interference and the disturbing wave output a DC voltage proportional to the intensity. The output of the correlation circuits is subtracted from an AGC voltage (c) for common gain control. |
