A method for obtaining a digital pre-distortion parameter, the method comprising: after the beginning of periodic filtering, obtaining a pre-distorted signal, and a power-amplified first feedback signal, wherein the pre-distorted signal is obtained in the following pre-distortion model: z n = ∑ m = 0 M − 1 x n − m ∑ q = 1 Q w m, q | x n − m | q − 1 + ∑ l = 1 L c ∑ m = 0 M − 1 x n − m ∑ q = 1 Q w m, q, − l | x n − m − l | q − 1 + ∑ l = 1 L c ∑ m = 0 M − 1 x n − m ∑ q = 1 Q w m, q, l | x n − m + l | q − 1 + ∑ l = 1 L c ∑ m = 0 M − 1 x * n − m ⋅ x 2 n − m − l ∑ q = 1 Q w m, q, − xl | x n − m − l | q − 3 + ∑ l = 1 L c ∑ m = 0 M − 1 x * n − m ⋅ x 2 n − m + l ∑ q = 1 Q w m, q, xl | x n − m + l | q − 3, wherein z(n) represents the pre-distorted signal output at an instance of time n, x(n) represents an original signal input at the instance of time n, n represents the instance of time at which the original signal is input, m represents an instant of time at which the original signal is memorized, w represents a pre-distortion parameter, M represents a memory depth, Q represents a nonlinear order, L represents the maximum number of interleaving samples, q represents a nonlinear order index, * represents conjugation of the signal, 1 represents an interleaving sample, x(n-m) represents the original signal, and x*(n-m) represents a conjugated signal of the original signal; removing a rated linear gain from the first feedback signal to obtain a second feedback signal; determining the pre-distortion parameter according to a matrix formed from the second feedback signal, and a matrix formed from the pre-distorted signal; and updating a table of pre-distortion parameter indexes using the determined pre-distortion parameter. after the beginning of periodic filtering, obtaining a pre-distorted signal, and a power-amplified first feedback signal, wherein the pre-distorted signal is obtained in the following pre-distortion model: z n = ∑ m = 0 M − 1 x n − m ∑ q = 1 Q w m, q | x n − m | q − 1 + ∑ l = 1 L c ∑ m = 0 M − 1 x n − m ∑ q = 1 Q w m, q, − l | x n − m − l | q − 1 + ∑ l = 1 L c ∑ m = 0 M − 1 x n − m ∑ q = 1 Q w m, q, l | x n − m + l | q − 1 + ∑ l = 1 L c ∑ m = 0 M − 1 x * n − m ⋅ x 2 n − m − l ∑ q = 1 Q w m, q, − xl | x n − m − l | q − 3 + ∑ l = 1 L c ∑ m = 0 M − 1 x * n − m ⋅ x 2 n − m + l ∑ q = 1 Q w m, q, xl | x n − m + l | q − 3, wherein z(n) represents the pre-distorted signal output at an instance of time n, x(n) represents an original signal input at the instance of time n, n represents the instance of time at which the original signal is input, m represents an instant of time at which the original signal is memorized, w represents a pre-distortion parameter, M represents a memory depth, Q represents a nonlinear order, L represents the maximum number of interleaving samples, q represents a nonlinear order index, * represents conjugation of the signal, 1 represents an interleaving sample, x(n-m) represents the original signal, and x*(n-m) represents a conjugated signal of the original signal; removing a rated linear gain from the first feedback signal to obtain a second feedback signal; determining the pre-distortion parameter according to a matrix formed from the second feedback signal, and a matrix formed from the pre-distorted signal; and updating a table of pre-distortion parameter indexes using the determined pre-distortion parameter.