A transmission apparatus comprising: a receiver that receives information related to a reception capability of each reception apparatus from each of M reception apparatuses, where M is an integer equal to 2 or greater; M signal processors (102_1, 102_2, 102_M) that respectively generate modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2) with respect to the M reception apparatuses, wherein each of the M signal processors (102_1, 102_2, 102_M) includes - a precoder that, in a case of transmitting multiple streams to a corresponding reception apparatus, accepts two modulation mapped signals (301A, 301B) to be transmitted to the corresponding reception apparatus, and generates a first precoded signal and a second precoded signal by precoding the two modulation mapped signals (301A, 301B), and - a phase changer that decides whether or not to execute phase change process based on the received information related to the reception capability of each of the M reception apparatuses, and when it is decided that the phase change should be executed, periodically changes a phase of signal points in an IQ plane with respect to the second precoded signal, and outputs a phase-changed signal, outputs the first precoded signal and the phase-changed signal as two modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2), and each of the M signal processors (102_1, 102_2, 102_M) outputs a single modulated signal in a case of transmitting a single stream to the corresponding reception apparatus; a multiplexing signal processor that generates N multiplexed signals (105_1, 105_2, 105_N), where N is an integer equal to 1 or greater, by multiplexing the modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2) output from each of the M signal processors (102_1, 102_2, 102_M); and N antenna sections (108_1, 108_2, 108_N) each including at least one antenna element, that respectively transmit the N multiplexed signals (105_1, 105_2, 105_N). a receiver that receives information related to a reception capability of each reception apparatus from each of M reception apparatuses, where M is an integer equal to 2 or greater; M signal processors (102_1, 102_2, 102_M) that respectively generate modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2) with respect to the M reception apparatuses, wherein each of the M signal processors (102_1, 102_2, 102_M) includes - a precoder that, in a case of transmitting multiple streams to a corresponding reception apparatus, accepts two modulation mapped signals (301A, 301B) to be transmitted to the corresponding reception apparatus, and generates a first precoded signal and a second precoded signal by precoding the two modulation mapped signals (301A, 301B), and - a phase changer that decides whether or not to execute phase change process based on the received information related to the reception capability of each of the M reception apparatuses, and when it is decided that the phase change should be executed, periodically changes a phase of signal points in an IQ plane with respect to the second precoded signal, and outputs a phase-changed signal, outputs the first precoded signal and the phase-changed signal as two modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2), and each of the M signal processors (102_1, 102_2, 102_M) outputs a single modulated signal in a case of transmitting a single stream to the corresponding reception apparatus; - a precoder that, in a case of transmitting multiple streams to a corresponding reception apparatus, accepts two modulation mapped signals (301A, 301B) to be transmitted to the corresponding reception apparatus, and generates a first precoded signal and a second precoded signal by precoding the two modulation mapped signals (301A, 301B), and - a phase changer that decides whether or not to execute phase change process based on the received information related to the reception capability of each of the M reception apparatuses, and when it is decided that the phase change should be executed, periodically changes a phase of signal points in an IQ plane with respect to the second precoded signal, and outputs a phase-changed signal, outputs the first precoded signal and the phase-changed signal as two modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2), and each of the M signal processors (102_1, 102_2, 102_M) outputs a single modulated signal in a case of transmitting a single stream to the corresponding reception apparatus; a multiplexing signal processor that generates N multiplexed signals (105_1, 105_2, 105_N), where N is an integer equal to 1 or greater, by multiplexing the modulated signals (103_1_1, 103_1_2, 103_2_1, 103_2_2, 103_M_1, 103_M_2) output from each of the M signal processors (102_1, 102_2, 102_M); and N antenna sections (108_1, 108_2, 108_N) each including at least one antenna element, that respectively transmit the N multiplexed signals (105_1, 105_2, 105_N).