[1] [1] Zhang G, Leenheer M D, Morea A, et al. A Survey on OFDM-based Elastic Core Optical Networking[J]. IEEE Communications Surveys & Tutorials,2013,15(1):65-87.

[2] [2] Basar E. Index Modulation Techniques for 5G Wireless Networks[J]. IEEE Communications Magazine, 2016, 54(7): 168-175.

[3] [3] Rahman T F, Habib A, Sacchi C, et al. Mm-Wave STSK-Aided Single Carrier Block Transmission for Broadband Networking[C]//2017 IEEE Symposium on Computers and Communications. Heraklion, Greece: IEEE, 2017: 8024579.

[4] [4] Narasimhan T L, Raviteja P, Chockalingam A. Generalized Spatial Modulation in Large-Scale Multiuser MIMO Systems[J]. IEEE Transactions on Wireless Communications, 2015, 14(7): 3764-3779.

[5] [5] Younis A, Serafimovski N, Mesleh R, et al. Generalized Spatial Modulation[C]// 2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers. Pacific Grove, CA, USA: IEEE,2010: 1498-1502.

[6] [6] Mesleh R, Ikki S, Aggoune H M. Quadrature Spatial Modulation [J]. IEEE Transactions Vehicular Technology, 2015, 64(6): 2738-2742.

[7] [7] Althunibat S, Mesleh R, Basar E. Differential Subcarrier Index Modulation[J]. IEEE Transactions on Vehicular Technology, 2018, 67(8): 7429-7436.

[8] [8] Inacio J C, Uchoa-Filho B F, Ruyet D L. Grouped Linear Constellation-Precoding for Subcarrier Index Modulation OFDM[C]// International Symposium on Wireless Communication Systems. Bologna, Italy: IEEE, 2017: 308-313.

[9] [9] Kaddoum G, Ahmed M F A, Nijsure Y. Code Index Modulation: A High Data Rate and Energy Efficient Communication System[J]. IEEE Communications Letters, 2015, 19(2): 175-178.

[10] [10] Kaddoum G, Nijsure Y, Tran H. Generalized Code Index Modulation Technique for High Data Rate Communication Systems[J]. IEEE Transactions on Vehicular Technology, 2016, 65(9): 7000-7009.

[11] [11] Datta T, Eshwaraiah H S, Chockalingam A. Generalized Space and Frequency Index Modulation[J]. IEEE Transactions on Vehicular Technology, 2016, 65(7): 4911-4924.

[12] [12] Patcharamaneepakorn P , Wang C X , Fu Y , et al. Quadrature Space-Frequency Index Modulation for Energy-Efficient 5G Wireless Communication Systems[J]. IEEE Transactions on Communications, 2018, 66(7): 3050-3064.

[16] [16] Sun Z, Xiao Y, Yang P, et al. Transmit Antenna Selection Schemes for Spatial Modulation Systems: Search Complexity Reduction and Large-scale MIMO Applications[J]. IEEE Transactions on Vehicular Technology, 2017, 66(9):8010-8021.

[17] [17] Rajashekar R, Hari K V S, Hanzo L. Reduced-Complexity ML Detection and Capacity-Optimized Training for Spatial Modulation Systems[J]. IEEE Transactions on Communications, 2014, 62(1):112-125.

[18] [18] Feng S, Zhong T, Ge L, et al. Space-Code Index Modulation for Wireless Communications[C]//2018 24th Asia-Pacific Conference on Communications. Ningbo, China: IEEE, 2018: 219-223.