It improves the operational precision of tap factor, it designates that equalization ability of the equalizer is made to increase as purpose, the data of the sampling interval which the expedient 4 which equalizes the input signal the expedient making use of the output of 3 which is sought the tap factor to which becomes necessary depending upon over sampling equalizer 1, includes the tap factor of symbol interval of the expedient making use 2 which calculates the tap factor every of symbol interval and the operational result, with interpolation and expedient 3 and expedient 4 outputs it has with the expedient 5 which thinning is done for the data of symbol interval.
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