Abstract: In a wireless communication system in which a base station, a mobile station, and a correspondent station are connected via a network, the base station includes a sounding-reference-signal arrangement control unit that causes sounding reference signals 5, 6, and 7, which are used for observing a propagation path state in the frequency band and are transmitted from the mobile station to the base station, to be transmitted for each of frequency bandwidths obtained by dividing the frequency band into a plurality of frequency bands in a minimum control time of the data transmission and in a time width shorter than the minimum control time, determines an arrangement of sounding reference signals 5, 6, and 7 in the minimum control time so that at least a part of transmission in the frequency bandwidth and transmission in another frequency bandwidth are executed at different times, and holds the arrangement as arrangement information.

Abstract: In a wireless communication system in which a base station, a mobile station, and a correspondent station are connected via a network, the base station includes a sounding-reference-signal arrangement control unit that causes sounding reference signals 5, 6, and 7, which are used for observing a propagation path state in the frequency band and are transmitted from the mobile station to the base station, to be transmitted for each of frequency bandwidths obtained by dividing the frequency band into a plurality of frequency bands in a minimum control time of the data transmission and in a time width shorter than the minimum control time, determines an arrangement of sounding reference signals 5, 6, and 7 in the minimum control time so that at least a part of transmission in the frequency bandwidth and transmission in another frequency bandwidth are executed at different times, and holds the arrangement as arrangement information.

Abstract: A calibration method according to the present invention includes a step of first channel estimating for transmitting a pilot signal from a first antenna and receiving the pilot signal at a second antenna different from the first antenna to calculate a first channel estimation value; a step of second channel estimating for transmitting a plot signal from the second antenna and receiving the pilot signal at the first antenna to calculate a second channel estimation value; and a step of correction coefficient calculating for calculating, by using the first and second channel estimation values, a correction coefficient.