Patent ID: 7203251

Claim:
An apparatus for compensating a phase difference of a receiver, the apparatus comprising: an accumulating means for accumulating a radio frequency (RF) input signal and generating an accumulated RF signal in order to minimize an effect of a background noise of the RF input signal; an early-local oscillating means for generating a phase-early local oscillated signal based on a local oscillated signal of the receiver; a late-local oscillating means for generating a phase-late local oscillated signal based on a local oscillated signal of the receiver; a phase early-late compensating means for compensating a phase early-late based on the accumulated RF input signal and the phase-early and phase-late local oscillated signals; a look-up table data mapping means for controlling a phase of the local oscillated signal with respect to a phase difference from the phase early-late compensating means; and a feedback transmitting means for transmitting a phase compensating data from the look-up table data mapping means to the local oscillator.