Patent ID: 6484017
Filing Date: 2002-11-19
Classification: H04B

Abstract:
An up converter of a transmitter in a wireless communication system, comprising:an input level detection section for detecting an analog input signal of the up converter, converting the detected analog input signal to a detected digital input signal, matching the detected digital input signal to one of a plurality of reference input values, and outputting a first analog output signal corresponding to the one reference input value; a variable attenuator for attenuating converted frequency in the up converter; an output level detection section for detecting an analog output signal of the up converter, converting the detected analog output signal to a detected digital output signal, matching the detected digital output signal to one of a plurality of reference output values, and outputting a second analog output signal corresponding to the one reference output value; and a processor for outputting a control signal to adjust the variable attenuator in accordance with the first and second analog output signals.