[5] [5] DING W B, YANG F, DAI W, et al. Time–frequency joint sparse channel estimation for MIMO-OFDM systems[J]. IEEE Communications Letters, 2015, 19(1):58-61.

[6] [6] CHAKRABORTY S, SEN D. Joint frequency offset and channel estimation in distributed MIMO-OFDM systems[J]. Wireless Personal Communications, 2016, 92(4):1-19.

[7] [7] WANG X, YANG T, HU B. Joint estimation of carrier and sampling frequency offsets in the uplink of multiuser OFDM systems[J]. Wireless Personal Communications, 2017, 97(3):3831-3845.

[8] [8] ZHANG Z, ZHANG Q W, CHEN J, et al. Low-complexity joint symbol synchronization and sampling frequency offset estimation scheme for optical IMDD OFDM systems[J]. Optics Express, 2016, 24(12):12577-12587.

[9] [9] ZHANG J, NIU K, HE Z. Multi-layer distributed Bayesian compressive sensing based blind carrier-frequency offset estimation in uplink OFDMA systems[C]// Proceedings of 2016 IEEE International Conference on Communications. Kuala Lumpur, Malaysia:IEEE, 2016:1-6.

[10] [10] JAYAPRAKASH A, REDDY G R. Covariance-fitting-based blind carrier frequency offset estimation method for OFDM systems[J]. IEEE Transactions on Vehicular Technology, 2016, 65(12):10101-10105.

[12] [12] ADEMAJ F, TARANETZ M, RUPP M. Implementation, validation and application of the 3GPP 3D MIMO channel model in open source simulation tools[C]// Proceedings of 2015 International Symposium on Wireless Communication Systems (ISWCS). Brussels, Belgium:IEEE, 2015:721-725.