A signal generation method, wherein the method comprises: sending, by a signal transmit end device, a first PAM signal to a signal receive end device, wherein the first PAM signal comprises N first level amplitudes, and N≥3; receiving, by the signal transmit end device, feedback parameters sent by the signal receive end device, wherein the feedback parameters are determined by the signal receive end device based on the first PAM signal; characterized by determining, by the signal transmit end device, N target level amplitudes based on the feedback parameters, wherein intervals between every two adjacent target level amplitudes in the N target level amplitudes are different from each other; and generating, by the signal transmit end device based on the N target level amplitudes, a second PAM signal that needs to be sent to the signal receive end device, wherein the method is applied in a broadcast-type network, and the broadcast-type network comprises at least two signal receive end devices, the sending, by a signal transmit end device, a first PAM signal to a signal receive end device comprises: sending, by the signal transmit end device, the first PAM signal to the at least two signal receive end devices; the receiving, by the signal transmit end device, feedback parameters sent by the signal receive end device comprises: receiving, by the signal transmit end device, at least two feedback parameters sent by the at least two signal receive end devices, wherein the at least two feedback parameters correspond one-to-one to the at least two signal receive end devices; and the determining, by the signal transmit end device, N target level amplitudes based on the feedback parameters comprises: determining, by the signal transmit end device, the N target level amplitudes based on a minimum value of the at least two feedback parameters. sending, by a signal transmit end device, a first PAM signal to a signal receive end device, wherein the first PAM signal comprises N first level amplitudes, and N≥3; receiving, by the signal transmit end device, feedback parameters sent by the signal receive end device, wherein the feedback parameters are determined by the signal receive end device based on the first PAM signal; characterized by determining, by the signal transmit end device, N target level amplitudes based on the feedback parameters, wherein intervals between every two adjacent target level amplitudes in the N target level amplitudes are different from each other; and generating, by the signal transmit end device based on the N target level amplitudes, a second PAM signal that needs to be sent to the signal receive end device, wherein the method is applied in a broadcast-type network, and the broadcast-type network comprises at least two signal receive end devices, the sending, by a signal transmit end device, a first PAM signal to a signal receive end device comprises: sending, by the signal transmit end device, the first PAM signal to the at least two signal receive end devices; the receiving, by the signal transmit end device, feedback parameters sent by the signal receive end device comprises: receiving, by the signal transmit end device, at least two feedback parameters sent by the at least two signal receive end devices, wherein the at least two feedback parameters correspond one-to-one to the at least two signal receive end devices; and the determining, by the signal transmit end device, N target level amplitudes based on the feedback parameters comprises: determining, by the signal transmit end device, the N target level amplitudes based on a minimum value of the at least two feedback parameters. sending, by the signal transmit end device, the first PAM signal to the at least two signal receive end devices; the receiving, by the signal transmit end device, feedback parameters sent by the signal receive end device comprises: receiving, by the signal transmit end device, at least two feedback parameters sent by the at least two signal receive end devices, wherein the at least two feedback parameters correspond one-to-one to the at least two signal receive end devices; and the determining, by the signal transmit end device, N target level amplitudes based on the feedback parameters comprises: determining, by the signal transmit end device, the N target level amplitudes based on a minimum value of the at least two feedback parameters. receiving, by the signal transmit end device, at least two feedback parameters sent by the at least two signal receive end devices, wherein the at least two feedback parameters correspond one-to-one to the at least two signal receive end devices; and the determining, by the signal transmit end device, N target level amplitudes based on the feedback parameters comprises: determining, by the signal transmit end device, the N target level amplitudes based on a minimum value of the at least two feedback parameters.