ORTHOGONAL TRANSFORMATION ERROR CORRECTION DEVICE

摘要

A phase regulator (20) aligns the phase of the waveform in an orthogonally transformed composite signal. An edge detector (21) detects edges in a composite signal after phase regulation. In the signal output by the edge detector (21), a phase shift detector (22) detects phase shift between the quadrature signal and the in-phase signal after orthogonal transformation and outputs a phase error signal (PE). For orthogonal transformation, an oscillator (17) connected to a mixer (15, 16) and a phase shifter (18) has a phase regulation unit which regulates the VCO clock edges on the basis of the phase error signal (PE) and corrects the phase shift of the original signal.