| 摘要 |
PURPOSE:To constitute the automatic equalizer of judgement feedback type having simple tap gain adjustment algorithm, by eliminating the effect of error to other parts, through the feedback of multi-value identification series to the feedback equalizer. CONSTITUTION:The input signal 1 is weighted with the variable attenuator 3 via the J stage tapped delay line 2, and the attenuation is determined with the signal of the line 5. The feedback signal 7 is subtracted 6 from the output of addition and the equalizing signal eliminating the interference between codes is outputted 8. The output 8 is judged 9 and the estimation value of the series added with the correlativity of partial response for the transmission data series is outputted 10 and 11. The output 10 is weighted and added 16 with the variable attenuator 13 for the L stage tapped dalay line 12 and outputted 7. The attenuation is determined with the signal on the line 15. The error signal 17 is outputted with the addition 14 through the use of the result of judgement 9, while the response inverse transformation unit 19 converts it into the estimation value of transmission data and output 5 is made with the correlativity 21 with the input 20 to the dalay line 18. The signal 15 is outputted with the correlativity 22 for each output between the error signal 17 and the delay line 12. |
