Patent ID: 9197263
Filing Date: 2015-11-24
Classification: H03L,H04B,H04L

Abstract:
1. A compensation apparatus which compensates a quadrature-demodulated signal output from a quadrature demodulator that performs quadrature demodulation by using a signal of a carrier frequency, by removing an image component caused by the quadrature demodulator from the quadrature-demodulated signal, the compensation apparatus comprising: a signal generator that generates a reference signal having a predetermined bandwidth in a reception band, and gives the reference signal to an input side of the quadrature demodulator; a calculation section that calculates a compensation parameter for rejecting the image component, based on a signal obtained by quadrature-demodulating the reference signal with the quadrature demodulator; and an image component rejection section that rejects the image component from the quadrature-demodulated signal based on the compensation parameter, wherein the reference signal includes a frequency band that is biased to either a higher-frequency side or a lower-frequency side with respect to the carrier frequency, and the calculation section