|| P. W. Wolniansky, G. J. Foschini, G. D. Golden and R. A. Valenzuela, “VBLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel,” in IEEE URSI Int. Symp. Signals, Systems, and Electronics, pp. 295–300, Oct. 1998|
 J. Bingham, “Multicarrier modulation for data transmission: An idea whose time has come,” IEEE Commun. Mag., vol. 28, pp. 5-14, May 1990.
 X. Ma, M.-K. Oh, G. B. Giannakis, and D.-J. Park, “Hopping pilots for estimation of frequency-offset and multiantenna channels in MIMOOFDM,” IEEE Trans. Commun., vol. 53, no. 1, pp. 162-172, 2005.
 J. Lee, H. Lou, D. Toumpakaris, and J. M. Cioffi, “Effect of carrierfrequency offset on OFDM systems for multipath fading channels,” IEEE Global Telecommun. Conf., vol.6, pp.3721-3725, Nov. 2004.
 Man-On Pun, M. Morelli and C.-C. Jay Kuo, “Iterative detection and frequency synchronization for OFDMA uplink transmissions” IEEE Trans. Wireless Commun., vol. 6, no. 2, pp. 629–639, Feb. 2007.
 P.H. Moose, “A technique for orthogonal frequency division multiplexing frequency offset correction,” IEEE Trans. Commun., vol 42, no. 10, pp. 2908–2914, 1994.
 A. J. Coulson, “Maximum likelihood synchronization for OFDM using a pilot symbol: Algorithm,” IEEE J. Sel. Areas Commun., vol. 19, no. 12, pp. 2486–2494, Dec. 2001.
 J. J. van de Beek, O. Edfors and M. Sandell, “On channel estimation in OFDM systems,” in Proc. Vehi. Technol. Conf., vol. 2, pp. 815–819, Jul. 1995.
 M. Morelli and U. Mengali, “A comparison of pilot-aided channel estimation methods for OFDM systems,” IEEE Trans. Signal Proc., vol. 49, no. 12, pp. 3065–3073, Dec. 2001.
 B.H. Fleury , M. Tschudin, R. Heddergott, D. Dahlhaus, K. Ingeman Pedersen, “Channel parameter estimation in mobile radio environments using the SAGE algorithm,” IEEE J. Sel. Areas Commun., vol. 17, pp. 434–450, Mar. 1999.
 C. Tao and C. Tellambura,“Robust joint frequency offset and channel estimation for OFDM systems,” IEEE Veh. Technol. Conf., vol.1, pp. 603-607, Sept. 2004.
 J. Chen, Y.C. Wu and T.S. Ng, “Optimal joint CFO and channel estimation in quasi-synchronized OFDM systems,” IEEE Global Telecommun. Conf., pp. 2816-2820, Nov. 2007.
 M.-O. Pun, M. Morelli, C.-C.J. Kuo, “Maximum-likelihood synchronization and channel estimation for OFDMA uplink transmissions,” IEEE Trans. Commun., vol. 54, pp. 726-736, April. 2006
 I. Ziskind, M. Wax, “Maximum likelihood localization of multiple sources by alternating projection,” IEEE Trans. Acoustic Speech Signal Process., vol. 36, pp. 1553-1560, Oct. 1998
 A. Saemi, V. Meghdadi, J.P. Cances, M.R. Zahabi, J.M. Dumas, “ML Time-Frequency Synchronization for MIMO-OFDM Systems in Unknown Frequency Selective Fading Channels,” in Proc. of the IEEE Int. Symp. on Personal, Indoor and Mobile Radio Commun. (PIMRC), pp. 1-5, Sept. 2007.
 A. SAEMI, V. MEGHDADI, J.P. CANCES, M.R. ZAHABI, “Iterative (turbo) EM-based time and frequency synchronization for MIMO – OFDM systems,” IET Commun., vol. 2, pp. 982– 993, 2008.
 S. Salari, M. Ardebilipour, and M. Ahmadian, “Joint maximum-likelihood frequency offset and channel estimation for multiple-input multiple-output-orthogonal frequency-division multiplexing systems,” IET Commun., vol. 2, pp. 1069-1076, 2008.
 S. Salari, M. Ahmadian, M. Ardebilipour, V. Meghdadi, J. P. Cances, “Maximum-likelihood carrier-frequency synchronization and channel estimation for MIMO-OFDM systems,” Wireless Telecommun. Symp., pp. 1-5, July. 2007.
 S. Salari, M. Heydarzadeh, and J. P. Cances, “Joint maximum-likelihood frequency synchronization and channel estimation in MIMO-OFDM systems with timing ambiguity,” in Int. Symp. on Wireless Commun. Systems (ISWCS), pp. 954 –958, Aug. 2012.
 S.-H. Chiu, K.-C. Fu, Y.-F. Chen, “A modified algorithm for joint frequency offset and channel estimation in OFDM systems,” Int. Conf. on Commun. in China (ICCC), Aug. 2013.
 M. Morelli and U. Mengali, “Carrier-frequency estimation for transmissions over selective channels,” IEEE Trans. Commun., vol. 48,no.9, Sept. 2000.
 H. Hojatian, M. J. Omidi, H. Saeedi-Sourck, A. Farhang, “Joint CFO and channel estimation in OFDM-based massive MIMO systems,” Int. Symp. on Telecommun. (IST), Sept. 2016.
 P. Stoica and O. Besson, ‘‘Training sequence design for frequency offset and frequency-selective channel estimation,’’ IEEE Trans. Commun., vol. 51, no. 11, pp. 1910--1917, Nov. 2003.