| 摘要 |
PURPOSE:To operate an automatic equalizer under an automatic equalizing mode when no interrelation is detected among discriminated data and to inhibit the correction of a tap coefficient and to operate the equalizer under a fixed mode when the interrelation is detected, by detecting the interrelation among discriminated data. CONSTITUTION:Each tap 1a-1g of an automatic equalizer is constituted of a delay element of one symbol quantity and multipliers 2a-2e for tap correction are respectively connected with the taps 1a-1e. Moreover, outputs of each multiplier 2a-2e are summed at an adder 3 and supplied to a carrier phase compensating section 4. A delay section is connected with the compensating section 4 and an error detected by an error detecting section 6 is delayed by one tap, multiplied 8 by the detected output of an interrelation detecting section 11, and supplied to multipliers 9a-9e for correcting each tap coefficient which control the validity/invalidity of errors. Then the interrelation among data is discriminated by a discriminating section 5 and, when no interrelation is detected among the data, the automatic equalizer is set to an automatic equalizing mode, and when the interrelation is detected, correction of a tap coefficient is inhibited and the equalizer is operated under a fixed mode. |
