CARRIER FREQUENCY OFFSET DETECTING APPARATUS IN A DIGITAL RECEIVER SYSTEM AND A METHOD THEREOF

摘要

A carrier frequency offset detecting apparatus of a digital receiver and a carrier frequency offset detecting method thereof. The carrier frequency offset detecting apparatus includes correlators to calculate individual correlation values by employing pseudo-noise sequences; at least one conjugate signal generation unit to generate a conjugate complex number for each of the correlation values; at least one multiplier to multip ly the individual conjugate complex numbers with the individual correlation values of the neighbored correlators; an adder to add the multiplied values; and a phase extractor to extract a phase component from an output value of the adder and output the phase component a s a carrier frequency offset. Therefore, the carrier frequency offset is detected even i n case that a pilot signal cannot be employed because of a poor channel environment.