A wireless communication system, comprising: a transmitter which transmits a first pilot signal, a second pilot signal and a data signal from a transmitting station to a receiving station, the first pilot signal and the second pilot signal and the data signal being used for information transmission, wherein the receiving station includes: a measuring section which measures an equivalent noise power (N(t)) on a communication path between the transmitting station and the receiving station using the first pilot signal, and a control signal generating section which transmits a control signal to the transmitting station based on the measured equivalent noise power (N(t)), characterized in that the transmitting station includes: a transmission power control section which corrects a transmission power (S(t)) of the second pilot signal and the data signal so as to have a negative correlation with the equivalent noise power (N(t)) according to the control signal and does not perform any correction of a transmission power (S(t)) of the first pilot signal according to the control signal, wherein the equivalent noise power (N(t)) is noise power viewed on a transmitter side being expressed by a ratio between a noise power received by the receiving station (Nr(t)) and a propagation gain (g(t)), and the negative correlation comprises that the transmission power (S(t)) is reduced when said gain (g(t)) decreases, and that the transmission power (S(t)) is increased when said gain (g(t)) increases. a transmitter which transmits a first pilot signal, a second pilot signal and a data signal from a transmitting station to a receiving station, the first pilot signal and the second pilot signal and the data signal being used for information transmission, wherein the receiving station includes: a measuring section which measures an equivalent noise power (N(t)) on a communication path between the transmitting station and the receiving station using the first pilot signal, and a control signal generating section which transmits a control signal to the transmitting station based on the measured equivalent noise power (N(t)), characterized in that the transmitting station includes: a transmission power control section which corrects a transmission power (S(t)) of the second pilot signal and the data signal so as to have a negative correlation with the equivalent noise power (N(t)) according to the control signal and does not perform any correction of a transmission power (S(t)) of the first pilot signal according to the control signal, wherein the equivalent noise power (N(t)) is noise power viewed on a transmitter side being expressed by a ratio between a noise power received by the receiving station (Nr(t)) and a propagation gain (g(t)), and the negative correlation comprises that the transmission power (S(t)) is reduced when said gain (g(t)) decreases, and that the transmission power (S(t)) is increased when said gain (g(t)) increases. a measuring section which measures an equivalent noise power (N(t)) on a communication path between the transmitting station and the receiving station using the first pilot signal, and a control signal generating section which transmits a control signal to the transmitting station based on the measured equivalent noise power (N(t)), characterized in that the transmitting station includes: a transmission power control section which corrects a transmission power (S(t)) of the second pilot signal and the data signal so as to have a negative correlation with the equivalent noise power (N(t)) according to the control signal and does not perform any correction of a transmission power (S(t)) of the first pilot signal according to the control signal, wherein the equivalent noise power (N(t)) is noise power viewed on a transmitter side being expressed by a ratio between a noise power received by the receiving station (Nr(t)) and a propagation gain (g(t)), and the negative correlation comprises that the transmission power (S(t)) is reduced when said gain (g(t)) decreases, and that the transmission power (S(t)) is increased when said gain (g(t)) increases. a transmission power control section which corrects a transmission power (S(t)) of the second pilot signal and the data signal so as to have a negative correlation with the equivalent noise power (N(t)) according to the control signal and does not perform any correction of a transmission power (S(t)) of the first pilot signal according to the control signal, wherein the equivalent noise power (N(t)) is noise power viewed on a transmitter side being expressed by a ratio between a noise power received by the receiving station (Nr(t)) and a propagation gain (g(t)), and the negative correlation comprises that the transmission power (S(t)) is reduced when said gain (g(t)) decreases, and that the transmission power (S(t)) is increased when said gain (g(t)) increases.