Patent ID: 6701163
Filing Date: 2004-03-02
Classification: H03G,H04B,H04L

Abstract:
A base station apparatus comprising:an interpolator that performs interpolation by inserting a signal into a multiplex transmission signal at a sampling point where there is no signal point; a filter that performs band restriction of the signal after the interpolation, using a filter coefficient in a memory; an envelope calculator that calculates an envelope corresponding to a locus of the signal after the band restriction; and a corrector that, when the envelope exceeds a permissible value, (i) calculates a correction coefficient, which is a ratio between said permissible value and the envelope, (ii) multiplies said correction coefficient and filter coefficient and calculates a correction value, and (iii) corrects the signal after the band restriction by subtracting said correction value from said signal after the band restriction.