ORTHOGONAL TRANSFORM ERROR CORRECTOR

摘要

A phase adjuster arranges phases of waveforms of a complex signal after orthogonal transform. An edge detector detects an edge of the complex signal after phase adjustment. A phase shift detector detects phase shift of an output signal of the edge detector between the in-phase signal and the quadrature signal after the orthogonal transform, and outputs a phase error signal (PE). The oscillator connected to mixers and a shifter to perform the orthogonal transform includes a phase adjustment section adjusting an edge of a voltage controlled oscillator (VCO) clock based on the phase error signal (PE) and correcting the phase shift of an original signal.

主权项

1. An orthogonal transform error corrector, comprising:
an orthogonal transform section configured to separate an in-phase signal and a quadrature signal from a complex signal; a phase adjuster configured to arrange phases of waveforms after orthogonal transform; an edge detection section configured to detect an edge of the complex signal after phase adjustment; a phase shift detection section configured to detect phase shift of an output signal of the edge detection section; and a phase adjustment section configured to correct phase shift of an original signal based on a phase shift amount detected by the phase shift detection section.