Patent ID: 8126411

Claim:
A transmitting apparatus for power amplification with delay control in a wireless communication system, the apparatus comprising: one or more signal converters for separating a baseband signal into an envelope signal and a phase modulated signal; a delay difference measurer for measuring a delay difference between an envelope signal path and a phase modulated signal path using a correlation coefficient extraction and interpolation technique; and a delay controller for, depending on the measured delay difference, setting a delay in a clock period unit to a signal path having a small delay and setting a delay by a remainder delay difference to a signal path having a large delay, wherein the delay difference measurer comprises: a down modulator for down converting a radio frequency (RF) signal into a baseband signal; a front correlation coefficient extractor for calculating a correlation coefficient between the down converted signal and an input baseband signal; a Region Of Interest (ROI) selector for determining an ROI signal interval based on the correlation coefficient; an interpolator for interpolating an envelope signal, a phase modulated signal, and a down converted signal for the determined ROI interval; a post correlation coefficient extractor for calculating an envelope signal correlation coefficient and a phase signal correlation coefficient using the interpolated envelope signal, interpolated down-converted signal, and interpolated phase-modulated signal; and a delay difference calculator for receiving an envelope signal delay amount (τ env ) and a phase signal delay amount (τ ph ) from the post correlation coefficient extractor and calculating a delay time difference (τ diff =τ env −τ ph ).