Double spatial modulation suitable for atmospheric laser communication

被引：0
|
作者：
Wang H.-Q. [1 ]
Yang S.-X. [1 ]
Li Y.-T. [1 ]
Wu X. [1 ]
机构：
[1] School of Computer & Communication, Lanzhou University of Technology, Lanzhou
来源：
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2020年 / 28卷 / 03期
关键词：
Double spatial modulation; Laser communication; Pulse amplitude modulation; Pulse position modulation; Spectral efficiency; Transmission rate;
D O I：
10.3788/OPE.20202803.0565
中图分类号：
学科分类号：
摘要：
Compared with traditional optical spatial modulation, optical generalized spatial modulation has a significant improvement in transmission rate and spectral efficiency. However, its bit error rate (BER) is not ideal. In this paper, a double spatial modulation (DSM) is proposed to simultaneously activate two lasers, using pulse position modulation (PPM) and pulse amplitude modulation (PAM). The theoretical upper bound of the bit error rate of DSM is then derived using union bound technology. Furthermore, the effect factors of spectral efficiency, transmission rate, and complexity are analyzed. The performance of DSM is compared with that of the proposed optical spatial modulation. The simulation results show that the DSM improves the spectrum efficiency and transmission rate of the system, and efficiently reduces its BER. When the transmission rate is the same and the bit error rate is 1×10-3, the signal-to-noise ratio of (3, 4)-8PPM-2PAM DSM is improved by approximately 2.5 and 6 dB compared with (4, 4)-8PPM SPPM and (3, 4)-4PPM GSPPM, respectively. Further, its spectral efficiency is increased by 2.335 and 0.375 bits/(s•Hz), respectively. Therefore, DSM scheme can effectively improve the transmission rate of atmospheric laser communication in the future. © 2020, Science Press. All right reserved.
引用
收藏
页码：565 / 572
页数：7
相关论文
共 18 条
  • [1] Wang H.Q., Wang X., Cao M.H., Bit error rate of optical multiple input multiple output system in correlated channels, Opt. Precision Eng., 24, 9, pp. 2142-2148, (2016)
  • [2] Ren Y.X., Huang H., Xie G.D., Et al., Atmospheric turbulence effects on the performance of a free space optical link employing orbital angular momentum multiplexing, Optics Letters, 38, 20, pp. 4062-4065, (2013)
  • [3] Jin G., Li Y.J., Zhong X., Et al., Design of co-aperture optce system for space imaging and laser communication, Opt. Precision Eng., 22, 8, pp. 2067-2074, (2014)
  • [4] Wang H.Q., Song L.H., Cao M.H., Et al., Compressed sensing detection of optical spatial modulation signal in turbulent channel, Opt. Precision Eng., 26, 11, pp. 2669-2674, (2018)
  • [5] Mesleh R., Mehmood R., Elgala H., Et al., Indoor MIMO optical wireless communication using spatial modulation, Proceedings of IEEE International Conference on Communications, pp. 1-5, (2010)
  • [6] Mesleh R., Elgala H., Haas H., Optical spatial modulation, IEEE/OSA Journal of Optical Communications and Networking, 3, 3, pp. 234-244, (2011)
  • [7] Fath T., Klaue J., Haas H., Coded spatial modulation applied to optical wireless communications in indoor environments, Wireless Communications and Networking Conference, pp. 1000-1004, (2012)
  • [8] Fath T., Haas H., Renzo M.D., Et al., Spatial modulation applied to optical wireless communications in indoor LOS environments, Proceedings of the Global Communications Conference, pp. 1-5, (2011)
  • [9] Popoola W.O., Poves E., Haas H., Spatial pulse position modulation for optical communications, Journal of Lightwave Technology, 30, 18, pp. 2948-2954, (2012)
  • [10] Pham H.T.T., Chu D.B., Dang N.T., Performance analysis of spatial PPM-based free-space optical communication systems with gaussian beam, International Conference on Advanced Technologies for Communications, pp. 144-148, (2014)
12