Radio communication device and radio communication method

摘要

It is provided a radio communication apparatus and radio communication method that, in the radio communication apparatus having a normal transmitting/receiving mode and a distortion correction mode, communicates successfully without influencing circuit characteristic in a normal transmitting/receiving mode, sends back a transmitting signal from the receiving system, extracts a distortion component due to narrowband characteristics or non-linear characteristics of a circuit, and corrects distortion in a distortion correction mode. In radio communication apparatus (100), distortion detecting section (111) extracts a distortion component using a transmitting baseband signal and a receiving baseband signal, coupling degree adjustment circuit (180) adjusts the degree of coupling between transmitting antenna (130) and receiving antenna (140), and coupling degree control section (170) switches the degree of coupling depending on a normal transmitting/receiving mode or a distortion correction mode.

主权项

1. A radio communication apparatus that has a normal transmitting/receiving mode and a distortion correction mode, the apparatus comprising:
a transmitting circuit that includes a transmitting processing circuit configured to generate a high frequency signal from a transmitting baseband signal by radio transmitting process and a power amplifier configured to amplify the high frequency signal; a transmitting antenna configured to transmit the high frequency signal amplified by the power amplifier; a receiving antenna configured to receive the high frequency signal transmitted by the transmitting antenna; a receiving circuit that includes a low noise amplifier configured to amplify the high frequency signal received by the receiving antenna and a receiving processing circuit configured to generate a receiving baseband signal by demodulating the high frequency signal amplified by the low noise amplifier; a distortion detecting section configured to detect a distortion component using the transmitting baseband signal and the receiving baseband signal; an adjustment section arranged between the transmitting antenna and the receiving antenna and configured to adjust a degree of coupling between the transmitting antenna and the receiving antenna, wherein the adjustment section includes a passive element, a ground, and a switch operable to connect the passive element to the ground; and a control section configured to close the switch to connect the passive element to the ground, in the normal transmitting/receiving mode, and to open the switch to disconnect the passive element from the ground, in the distortion correction mode.