| 摘要 |
PURPOSE:To eliminate the ghost stably in a short time, by obtaining an integral value of the square of an input waveform including the ghost changing the value of the correction constant in accordance with this integral value. CONSTITUTION:An output H(t) of a transversal filter and a reference signal waveform R(t) are inputted to a differential amplifier 45 to obtain an error voltage E(t). Products between an input signal X(t) or outputs X(t-Jgamma) of delay elements 411-414 and the voltage E(t) are obtained by multipliers 481-484 and are integrated by integrators 471-474. The gain of amplifiers 420-424 is adjusted by outputs of integrators 471-474 to cause the output H(t) to approach the signal R(t). An inversion amplifier 49 outputs the reciprocal of an output P of an integrator 475. Products between this reciprocal output and outputs of integrators 471 and etc. are obtained by multipliers 461 and etc., and the gain of amplifiers 420-424 is adjusted by outputs of these multipliers. |
