Wireless communication apparatus

Abstract

In a wireless communication apparatus adopting a time division duplex system for executing transmission and reception using a plurality of antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation meansdetects channel information based on reception output of reception circuits-to-N provided in a one-to-one correspondence with a plurality of antennas-to-N. Correction value detection meansfinds a correction value for correcting deviation occurring between each of transmission circuits-to-N and each of the reception circuits-to-N based on the channel information. A wireless communication apparatustransmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection meansof the wireless communication apparatusdetects the correction value using the correction signal (probe signal).