Frequency error detecting device capable of correctly...

H - Electricity – 03 – D

Patent

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H03D 3/00 (2006.01) H04L 27/22 (2006.01)

Patent

CA 2110032

Supplied with a transmitted signal defined by sequence signal vectors each successive pair of which has an equal predetermined phase variation, a demodulator quadrature-demodulates a transmitted signal into a demodulated signal with reference to a standard signal of a standard frequency. The demodulated signal is defined by a sequence of demodulated vectors. An A/D section samples the demodulated vectors at a predetermined sampling rate to quantize the demodulated vectors into quantized vectors. A signal processor constructs a composite vector from a predetermined number of the quantized vectors. The signal processor calculates a phase difference between the composite vector and a predetermined vector to detect a frequency error between the standard frequency and a carrier frequency of the transmitted signal.

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