[1] [1] Renzo M D, Haas H, Ghrayeb A, et al. Spatial Modulation for Generalized MIMO: Challenges, Opportunities, and Implementation［J］. Proceedings of the IEEE, 2014, 102(1):56-103.

[2] [2] Mesleh R, Elgala H, Hass H. Optical Spatial Modulation［J］. Journal of Optical Communications and Networking, 2011, 3(3):234-244.

[3] [3] Jaiswal A, Bhatnager M R, Jain V K. Performance of Optical Space Shift Keying over Gamma-Gamma Fading with Pointing Error［J］. IEEE Photonics Journal, 2017, 9(2):7200716.

[4] [4] Pham H T T, Chu D B, Dang N T. Performance Analysis of Spatial PPM-based Free-Space Optical Communication Systems with Gaussian Beam［C］//2014 IEEE International Conference on Advanced Technologies for Communications (ATC 2014). Hanoi, Vietnam: IEEE, 2014:144-148.

[5] [5] Le M T, Ngo V D, Mai H A, et al., Spatially Modulated Orthogonal Space-Time Block Codes with Non-Vanishing Determinants［J］. IEEE Transactions on Communications, 2014, 62(1):85-99.

[6] [6] Fettahoglu F, Odabasioglu N. Space Time Block Coded Spatial Modulation for Free Space Optical Communication［C］//2017 IEEE International Black Sea Conference on Communications and Networking (Black Sea Com). Istanbul, Turkey: IEEE, 2017:1-5.

[7] [7] Simon M K, Vilnrotter V A. Alamouti-Type Space-Time Coding for Free-Space Optical Communication with Direct Detection［J］. IEEE Transactions on Wireless Communications, 2005， 4(1):35-39.

[10] [10] Kono Y, Pandey A, Sahu A. BER Analysis of Lognormal and Gamma-Gamma Turbulence Channel under Different Modulation Techniques for FSO System［C］//2019 IEEE 3rd International Conference on Trends in Electronics and Informatics (ICOEI). Tirunelveli, India:IEEE, 2019:1385-1388.

[11] [11] Craig J W. A New, Simple and Exact Result for Calculating the Probability of Error for Two-Dimensional Signal Constellations［C］//1991 IEEE Military Communications Conference. McLean, VA, USA:IEEE, 2002:571-575.

[12] [12] Ozbilgin T, Koca M. Optical Spatial Modulation over Atmospheric Turbulence Channels［J］. Journal of Lightwave Technology, 2015, 33(11):2313-2323.