Fig. 1. Schematic diagram of adaptive carrier recovery algorithm

Fig. 2. Schematic diagram of PS-64QAM simulation

Fig. 3. Mean deviation of frequency offset estimation under different frequency offset conditions. (a) N_FFT=2048; (b) N_FFT=4096

Fig. 4. Mean deviation of frequency offset estimation under different SNR conditions. (a) N_FFT=2048; (b) N_FFT=4096

Fig. 5. Signal mutual information after carrier recovery under different N_BPS. (a) l_w=100 kHz; (b) l_w=500 kHz

Fig. 6. Signal mutual information after carrier recovery under different SNR. (a) N_FFT=2048; (b) N_FFT=4096