[3] [3] ELLIS J D,PURSLEY M B. Integration of adaptive modulation and channel coding with fountain coding for packet radio systems[J]. IEEE Transactions on Communications, 2015,63(5):1510-1521.

[4] [4] CHUNG C,UENG F B,CHANG Y K. Frequency-domain iterative SDFE for MIMO-OFDM systems[J]. Wireless Personal Communications, 2016,86(3):1121-1140.

[5] [5] WU C F,CHEN C H,SHIUE M T. Decision-directed beamforming and channel equalization algorithm for IEEE 802.11n OFDM systems[C]// Proceedings of 2016 International Symposium on Computer, Consumer and Control(IS3C). Xi'an,China: IEEE, 2016:220-223.

[7] [7] GUO M Q,ZHOU J,QIAO Y J,et al. Simplified maximum likelihood detection for FTN non-orthogonal FDM system[J]. IEEE Photonics Technology Letters, 2017,29(19):1687-1690.

[8] [8] WANG Q W,REN G L. Iterative maximum likelihood detection for initial ranging process in 802.16 OFDMA systems[J]. IEEE Transactions on Wireless Communications, 2015,14(5):2778-2787.

[9] [9] MATTHE M,FETTWEIS G. Conjugate root offset-QAM for orthogonal multicarrier transmission[J]. Eurasip Journal on Advances in Signal Processing, 2016(1):1-8.

[10] [10] VELJKO S. Iterative frequency domain maximum likelihood OFDM carrier frequency offset estimation[J]. Wireless Personal Communications, 2016,91(2):975-987.

[13] [13] BERGOGNE C,SEHIER P,BOUSQUET M. Reduced complexity frequency estimator for burst transmission[J]. International Journal of Satellite Communications, 2015,14(6):455-465.

[15] [15] YANG H,SHIN W J,LEE S,et al. A robust estimation of residual carrier frequency offset with I/Q imbalance in OFDM systems[J]. IEEE Transactions on Vehicular Technology, 2015,64(3):1254-1259.

[16] [16] YUAN H F,KAM P Y. On the LLR metrics for DPSK modulations over two-symbol observation intervals for the flat Rician fading channel[J]. IEEE Transactions on Communications, 2015,63(12):4950- 4963.