Patent ID: 8189649

Claim:
A signal generation device for a wireless communication apparatus for supplying a transmission signal formed from transmission data, using a reception signal in TDD (Time Division Duplex) system input from a reception circuit connected to an antenna, to a transmission circuit connected to the antenna, the signal generation device comprising: a channel estimator which detects fluctuation information of the transmission circuit and the reception circuit using a correction signal contained in the reception signal, the correction signal including the fluctuation information of the transmission circuit, and which detects channel information using a known signal contained in the reception signal, the channel information including a channel response by using the known signal contained in the reception signal and the fluctuation information of the reception circuit; a correction value detector which detects a correction value for correcting deviation occurring between the transmission circuit and the reception circuit using the fluctuation information of the transmission circuit and the reception circuit; a reception weight generator which generates a reception weight using the channel information; a transmission weight generator which generates a transmission weight using the reception weight and the correction value; and a transmission signal weighter which outputs the transmission signal generated by weighting the transmission data using the transmission weight to the transmission circuit.