|| A. Damnjanovic, J. Montojo, W. Yongbin, J. Tingfang, L. Tao, M. Vajapeyam, Y. Taesang, S. Osok, and D. Malladi, "A survey on 3GPP heterogeneous networks," IEEE Wireless Commun., vol.18, no.3, pp.10-21, Jun. 2011.|
 Y. L. Lee, T. C. Chuah, J. Loo, and A. Vinel, “Recent Advances in Radio Resource Management for Heterogeneous LTE/LTE-A Networks,” IEEE Commun. Surveys and Tutorials, vol. 16, no. 4, pp. 2142-2180, Jun. 2014.
 A. BouSaleh, S. Redana, B. Raaf, and J. Hämäläinen, “Comparison of relay and pico eNB deployments in LTE-advanced,” in Proc. IEEE VTC-FALL, pp.1-5, 20-23, Sep. 2009.
 M. Morelli, “Timing and frequency synchronization for the uplink of an OFDMA system,” IEEE Trans. on Commun., vol. 52, pp. 296–306, Feb. 2004.
 Z. Cao, U. Tureli and Y. Yao, “Deterministic Multiuser Carrier-Frequency Offset Estimation for Interleaved OFDMA Uplink,” IEEE Trans. on Commun., vol. 52, no. 9, pp. 1585-1594, Sep. 2004.
 Kuang, J. Lu, Z. Ni and J. Zheng, “Non-pilot-aided carrier frequency tracking for uplink OFDMA systems,” in Proc. IEEE Inter. Conf. on Commun., vol. 6, pp. 3193-3196, Jun. 2004.
 M. Hua and J. Zhu, “Blind estimation of frequency offset and time delay in uplink OFDMA,” in Proc. Vehicular Technology Conf., vol. 61, pp. 1094–1099, Jun. 2005.
 J. van de Beek, P. O. Borjesson, M. Boucheret, D. Landstrom, J. M. Arenas, P. Odling, C. Ostberg, M. Wahlqvist and S. K. Wilson, “Time and frequency synchronization scheme for multiuser OFDM,” IEEE J. Select. Areas Commun., vol. 17, no. 11, pp. 1900-1914, Nov. 1999.
 H. Wang, Q. Yin, L. Ding and K. Deng, “Multiuser Carrier Frequency Offset Estimation for OFDMA Uplink with Generalized Carrier Assignment Scheme,” IEEE GLOBECOM Conf., vol. 8, no. 7, pp. 3347-3353, Jul. 2009.
 Z. Wang, Y. Xin, and G. Mathew, “Iterative Carrier-Frequency Offset Estimation for Generalized OFDMA Uplink Transmission,” IEEE Trans. on Commun., vol. 8, no. 3, pp. 1373-1383, Mar. 2009.
 L. Liu, Y. Guan, G. Bi and D. Shao, “Effect of Carrier Frequency Offset on Single-Carrier CDMA With Frequency-Domain Equalization,” IEEE Trans. on Vehicular Technology, vol. 60, no. 1, pp. 174-184, Jan. 2011.
 P. Sun, M. Morelli and L. Zhang, “Carrier Frequency Offset Tracking in the IEEE 802.16e OFDMA Uplink,” IEEE Trans. on Commun., vol. 9, no. 12, pp.3613-3619, Dec. 2010.
 F. E. M. Suliman, N. M. Elhassan and T. A. Ibrahim, “Frequency Offset Estimation and Cell Search Algorithms for OFDMA Based Mobile WiMAX,” ICACT Trans. On Advanced Commn. Technology, vol. 1, no. 1 pp.26-32, Jul. 2012.
 B. Ranjha, M. I. Sakib Chowdhury, and M. Kavehrad, “Interference Analysis of Interleaved and Localized Mapping Schemes in OFDMA System with Carrier Frequency Offset,” IEEE Conf. on Military Commun, pp. 1-6, Nov. 2013.
 H. C. Nguyen, E. de Carvalho and R. Prasad, “Multi-User Interference Cancellation Schemes for Carrier Frequency Offset Compensation in Uplink OFDMA,” IEEE Trans. On Commun., vol. 13, no. 3, pp. 1164-1171, Mar. 2014.
 M.-O. Pun, S.-H. Tsai, and C.-C. J. Kuo, “Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems,” in Proc. IEEE GLOBECOM Conf., vol. 6, pp. 3748–3752, Dec. 2004.
 J. Lee, S. Lee, Keuk-Joon Bang, S. Cha, and D. Hong, “Carrier Frequency Offset Estimation Using ESPRIT for Interleaved OFDMA Uplink Systems,” IEEE Trans. on Vehicular Technology, vol. 56, no. 5, pp. 3227-3231, Sep. 2007.
 R. Roy and T. Kailath, “ESPRIT─Estimation of signal parameters via rotational invariance techniques,” IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. 37, no. 7, pp. 984-995, Jul. 1989.
 P. Stoica and R. Moses, Introductions to Spectral Analysis. Englewood Cliffs, NJ: Prentice-Hall, 1997.
 T.-J. Shan, M. Wax, and T. Kailath, “On Spatial Smoothing for Direction-of-Arrival Estimation of Coherent Signals,” IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. 33, no. 4, pp. 806-811, Aug. 1985.
 P. Stoica and A. Nehorai, “MUSIC, Maximum Likelihood, and Cramer-Rao Bound,” IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. 37, no. 5, pp. 720-741, May 1989.
 S. V. Lohar and A. R. Khedkar, “A novel subcarrier-power assignment scheme for OFDMA systems,” in Proc. Computing and Networking Tech., Signal Proce., pp. 295–300, Jul. 2011.
 B. Ai, Z. Yang, C. Pan; J. Ge, Y. Wang and Z. Lu, “On the synchronization techniques for wireless OFDM systems,” IEEE Trans. on Broadcas.,vol. 52, pp. 236-244, Jun. 2006.
 Z. Cao, U. Tureli and Y. Yao, “Low-complexity orthogonal spectral signal construction for generalized OFDMA uplink with frequency synchronization errors,” IEEE Trans. on Veh. Technol., vol. 56, pp. 1143-1154, May 2007.
 Y.-F. Chen and Chi, S.S., “A RAKE receiver design for WCDMA FDD uplink with an RLS-based adaptive beamforming scheme,” IEEE Trans. on Vehicular Technology, vol. 54, no. 2, pp. 508-515, Mar. 2005.
 M. Wax, and T. Kailath, “Detection of signals by information theoretic criteria,” IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. 33, no. 2, pp. 387-392, Apr. 1985.
 S. Haykin, Adaptive Filter Theorem, 4th ed., NJ: Prentice Hall, 2002.
 S. M. Kay, Fundamentals of Statistical Signal Processing, Vol. 2: Estimation Theory, NJ: Prentice Hall, 1993
 D. G. Manolakis, V.K. Ingle, and S.M. Kogon, Statistical and Adaptive Signal Processing, NJ: McGRAW-Hill International Editions, 2000.
 Proakis and Salehi, Essentials of Communication Systems Engineering, NJ: Prentice Hall, 2005.