Carrier frequency offset detecting apparatus in a digital...

Details Carrier frequency offset detecting apparatus in a digital... Carrier frequency offset detecting apparatus in a digital...

H - Electricity

04

L

H04L 27/00 (2006.01) H04L 27/06 (2006.01)

Patent

CA 2510563

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 multiply 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 as a carrier frequency offset. Therefore, the carrier frequency offset is detected even in case that a pilot signal cannot be employed because of a poor channel environment.

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