COMMUNICATION DEVICE, SET VALUE CALCULATION METHOD FOR CORRECTING QUADRATURE ERROR, AND PROGRAM FOR CORRECTING QUADRATURE ERROR

摘要

PROBLEM TO BE SOLVED: To discriminate nonlinear characteristics from the error in quadrature modulator and demodulator.

SOLUTION: A communication device comprises: a quadrature modulator 230 for modulating I2 and Q2 to I3 and Q3 by LO0; a quadrature modulator error corrector 402 for correcting the quadrature error of the quadrature modulator; a quadrature demodulator 240 for modulating I3 and Q3 to I4 and Q4 by LO2; a quadrature demodulator error corrector 404 for correcting the quadrature error of the quadrature demodulator 240; and a quadrature error estimator 403 for calculating the set value of the quadrature modulator error corrector 402, and the set value of quadrature demodulator error corrector 404 on the basis of the phase differential between LO0 and LO2, I2 and Q2, and I4 and Q4.

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