Patent ID: 6751274
Filing Date: 2004-06-15
Classification: H04L

Abstract:
A channel estimating apparatus in a radio communication system, comprising:a fading estimator for estimating a channel using preset symbols of an input signal; a first interpolator for interpolating other symbols of the input signal based on the fading estimation; a first inverter for inverting an output signal of the first interpolator; a first delay for delaying the input signal for a predetermined time; a first multiplier for primarily compensating an output signal of the first delay by means of the output signal of the first inverter; a second interpolator for interpolating each symbol of the input signal relating to primarily compensated symbols in a predetermined period before and after the symbol; a level controller for controlling the level of an output signal of the second interpolator; a second inverter for inverting an output signal of the level controller; a second delay for delaying the primarily compensated signal for a predetermined time; and a second multiplier for secondarily compensating an output signal of the second delay by means of the output signal of the second inverter.