| 摘要 |
PURPOSE:To attain effective waveform equalization by converting an external disturbance in a state independently of a transmission signal to estimate the transmission line characteristic in the waveform equalizing method shaping and recovering in reception signal waveform which is distorted through a transmission line (recording medium). CONSTITUTION:A transmission signal (recording signal) uk is received through a transmission line (recording medium) 1 and an output xk is outputted. The output xk is a true output and a quantity not observed actually. The external disturbance vk having correlation with the transmission signal uk is superimposed on the output xk. The signal superimposed with the external disturbance vk from the line 1 is yk, which is an observable quantity. The synthesized signal yk is inputted to an equalizer 2, where the signal is equalizing processing and extracted as a signal dk. When the external disturbance with correlation with the input signal is included in the output signal, the external disturbance is converted into a white signal having no correlation with the input signal to grasp properly the characteristic of the transmission line (recording medium). |
