[1] Banelli P, Buzzi S, Colavolpe G, Modenini A, Rusek F, Ugolini A. Modulation formats and waveforms for 5G networks: who will be the heir of OFDM?: an overview of alternative modulation schemes for improved spectral efficiency. IEEE Signal Processing Magazine, 2014, 31(6): 80–93

[2] Li Y, Winters J H, Sollenberger N R. MIMO-OFDM for wireless communications: signal detection with enhanced channel estimation. IEEE Transactions on Communications, 2002, 50(9): 1471–1477

[3] IEEE 802.16a. Local and Metropolitan Area Networks—Part 16, Air Interface for Fixed Broadband Wireless Access Systems. IEEE Standard, 2004

[4] IEEE 802.11a. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High-Speed Physical Layer in the 5 GHz Band. IEEE Standard, 1999

[5] Suthaharan S, Nallanathan A, Kannan B. Space-time coded MIMOOFDM for high capacity and high data-rate wireless communication over frequency selective fading channels. In: Proceedings of International Workshop on Mobile and Wireless Communications. Stockholm: IEEE, 2002, 424–428

[6] Alamouti S. A simple transmit diversity technique for wireless communications. IEEE Journal on Selected Areas in Communications, 1998, 16(8): 1451–1458

[7] Tashiro K, Lanante L Jr, Kurosaki M, Ochi H. High-resolution image transmission over MIMO-OFDM E-SDM system with JSCC. In: Proceedings of IEEE Fourth International Conference on Consumer Electronics Berlin (ICCE-Berlin). Berlin: IEEE, 2014, doi: 10.1109/ICCE-Berlin.2014.7034243

[8] Tarokh V, Jafarkhani H, Calderbank A R. Space-time block codes from orthogonal designs. IEEE Transactions on Information Theory, 1999, 45(5): 1456–1467

[9] Tarokh V, Seshadri N, Calderbank A R. Space-time codes for high data rate wireless communication: performance criterion and code construction. IEEE Transactions on Information Theory, 1998, 44(2): 744–765

[10] Gupta D, Vats V B, Garg K K. Performance analysis of DFTOFDM, DCT-OFDM, and DWT-OFDM systems in AWGN channel. In: Proceedings of International Conference on Wireless and Mobile Communications. Athens: IEEE, 2008, 214–216

[11] Hamid Z A, Samir M, Abd El-atty S M, El-Hennawy A E, El Shenawy H, Alshebeili S A, Abd El-Samie F E. On the performance of FFT/DWT/DCT-based OFDM systems with chaotic interleaving and channel estimation algorithms. Wireless Personal Communications, 2014, 78(2): 1495–1510

[12] Lakshmanan M K, Nikookar H. A review of wavelets for digital wireless communication.Wireless Personal Communications, 2006, 37(3-4): 387–420

[13] Zhang X D, Xu P P, Zhang G A, Bi G G. Study on complex wavelet packet based OFDM modulation (CWPOFDM). Chinese Journal of Electronics, 2002, 30(4): 477–479

[14] Sejdic E, Djurovic I, Stankovic L. Fractional Fourier transform as a signal processing tool: an overview of recent developments. Signal Processing, 2011, 91(6): 1351–1369

[15] Molteni D, Nicoli M, Spagnolini U. Performance of MIMOOFDMA systems in correlated fading channels and non-stationary interference. IEEE Transactions on Wireless Communications, 2011, 10(5): 1480–1494

[16] Abdullah K, Sadik A Z, Hussain Z M. On the DWT- and WPTOFDM versus FFT-OFDM. In: Proceedings of 5th IEEE GCC Conference & Exhibition. Kuwait City: IEEE, 2009, 1–5

[17] Asif R, Abd-Alhameed R A, Oanoh O, Dama Y, Migdadi H S, Noars J M, Hussaini A S, Rodriquez J. Performance comparison between DWT-OFDM and FFT-OFDM using time domain zero forcing equalization. In: Proceedings of 2012 International Conference on Telecommunication and Multimedia. Chania: IEEE, 2012, 175–179

[18] Sharma V, Singh G. On BER assessment of conventional- and wavelet-OFDM over AWGN channel. Optik (Stuttgart), 2014, 125(20): 6071–6073

[19] Kumbasar V, Kucur O. Performance comparison of wavelet based and conventional OFDM systems in multipath Rayleigh fading channels. Digital Signal Processing, 2012, 22(5): 841–846

[20] Kansal A, Singh K, Saxena R. FrFT based OFDM system for Wireless Communications. International Journal of Engineering Science, 2014, 10(6): 43–48

[21] Kansal A, Singh K, Saxena R. Performance analysis of FrFT based OFDM system with 1024-PSK and 1024-QAM modulation under various wireless fading channels. International Journal of Systems Assurance, Engineering and Management, 2017, 8(supplement 1): 137–145

[22] Kansal A, Singh K, Saxena R. Bit error rate analysis of FrFT appended OFDM system. Optik (Stuttgart), 2015, 126(7–8): 715–718

[23] Vieira J, Malkowsky S, Nieman K, Miers Z, Kundargi N, Liu L, Wong I, Owall V, Edfors O, Tufvesson F. A exible 100-antenna testbed for massive MIMO. In: Proceedings of IEEE Global Communications Conference (GLOBECOM) Workshop on Massive MIMO: From Theory to Practice. Austin, TX: IEEE, 2014, 287–293

[24] Kim Y, Ji H, Lee J, Nam Y H, Ng B L, Tzanidis I, Li Y, Zhang J. Full dimension MIMO (FD-MIMO): the next evolution of MIMO in LTE systems. IEEEWireless Communications, 2014, 21(3): 92–100

[25] Ge X, Huang K,Wang C X, Hong X, Yang X. Capacity analysis of a multi-cell multi-antenna cooperative cellular network with cochannel interference. IEEE Transactions on Wireless Communications, 2011, 10(10): 3298–3309

[26] Ge X, Wang H, Zi R, Li Q, Ni Q. 5G multimedia massive MIMO communications systems. Wireless Communications and Mobile Computing, 2016, 16(11): 1377–1388

[27] Ge X, Zi R, Wang H, Zhang J, Jo M. Multi-user massive MIMO communication systems based on irregular antenna arrays. IEEE Transactions onWireless Communications, 2016, 15(8): 5287–5301

[28] Spencer Q H, Peel C B, Swindlehurst A L, Haardt M. An introduction to the multi-user MIMO downlink. IEEE Communications Magazine, 2004, 42(10): 60–67

[29] Kansal L, Sharma V, Singh J. BER assessment of FFT-OFDM against WHT-OFDM over different fading channels. Wireless Networks, 2017, 23(7): 2189–2196

[30] Kansal L, Sharma V, Singh J. Performance evaluation of FFTWiMAX against WHT-WiMAX over Rayleigh fading channel. Optik (Stuttgart), 2016, 127(10): 4514–4519