where γ1 =8.00335−j4.61157, γ2 =− 3.77167+j12.03758, ζ1 = 2.26895 and ζ2 = 0.8234 [17]. In order to compensate for the nonlinearity of the PA, an adaptive predistorter with memoryless polynomial model is utilized at the transmitter end. The sample size N = 3000 and the number of polynomial terms K = 5. The baseband input x(n) is an IEEE802.11ac signal with 40MHz bandwidth and 64QAM modulation. The OFDM signals can be regarded as distributed in complex Gaussian. The signal to noise ratio (SNR) is 40dB, which is typical for a commercial radio front end.