Gamma-Gamma湍流信道下广义空时脉冲位置调制

张悦; 王惠琴; 张莉萍; 包仲贤

doi:10.37188/OPE.20202811.2437

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Gamma-Gamma湍流信道下广义空时脉冲位置调制

现代应用光学 | 更新时间：2020-12-09

- Gamma-Gamma湍流信道下广义空时脉冲位置调制
- Generalized space-time pulse position modulation over Gamma-Gamma turbulence channel
- 光学精密工程 2020年28卷第11期页码：2437-2445
- 作者机构：
  
  1. 兰州理工大学计算机与通信学院, 甘肃兰州 730050
  2. 中国铁路兰州局集团有限公司兰州通信段, 甘肃兰州 730000
- 作者简介：
  
  [ " 张悦(1994-), 女, 甘肃天水人, 博士研究生, 2016年于南京邮电大学获得学士学位, 主要从事无线光通信MIMO技术方面的研究。E-mail:zyue940209@163.com " ]
  [ " 王惠琴(1971-), 女, 甘肃渭源人, 教授, 博士生导师, 2011年于西安理工大学获得博士学位, 主要从事无线光通信理论与技术方面的研究。E-mail:15117024169@139.com " ]
- 基金信息：
  
  国家自然科学基金资助项目(61861026);国家自然科学基金资助项目(61875080)
- DOI：10.37188/OPE.20202811.2437
  中图分类号： TN929.12
- 收稿日期：2020-04-23，
  
  修回日期：2020-06-15，
  
  录用日期：2020-6-15，
  
  纸质出版日期：2020-11-25
- 稿件说明：
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张悦, 王惠琴, 张莉萍, 等. Gamma-Gamma湍流信道下广义空时脉冲位置调制[J]. 光学精密工程, 2020,28(11):2437-2445.

Yue ZHANG, Hui-qin WANG, Li-ping ZHANG, et al. Generalized space-time pulse position modulation over Gamma-Gamma turbulence channel[J]. Optics and precision engineering, 2020, 28(11): 2437-2445.
张悦, 王惠琴, 张莉萍, 等. Gamma-Gamma湍流信道下广义空时脉冲位置调制[J]. 光学精密工程, 2020,28(11):2437-2445. DOI： 10.37188/OPE.20202811.2437.

Yue ZHANG, Hui-qin WANG, Li-ping ZHANG, et al. Generalized space-time pulse position modulation over Gamma-Gamma turbulence channel[J]. Optics and precision engineering, 2020, 28(11): 2437-2445. DOI： 10.37188/OPE.20202811.2437.

摘要

针对现有光空间调制空间资源利用率较低、传输速率不理想等问题，本文将线性弥散码与光空间调制相结合，提出了一种广义空时脉冲位置调制(Generalized Space-time Pulse Position Modulation，GSTPPM)方案。详细介绍了广义空时弥散矩阵映射和脉冲位置调制映射原理，采用球形译码算法完成了信号检测。在此基础上，推导了GSTPPM方案的理论误码率表达式，并利用蒙特卡洛法将所提方案与现有的光空间调制方案进行了对比。仿真结果表明：当激光器数目和调制阶数固定时，GSTPPM方案的传输速率明显高于空间复用、光空间脉冲位置调制和广义光空间脉冲位置调制。当传输速率相同时，(2，4，4)-GSTPPM的误码率明显优于(32，4，4)-光空间脉冲位置调制和(5，4，4)-广义光空间脉冲位置调制。当BER=10

-3

时，前者的信噪比比后者分别改善了约7 dB和5.5 dB。

Abstract

To overcome the low space resource utilization and limited transmission rate of traditional optical spatial modulation

a Generalized Space-time Pulse Position Modulation (GSTPPM) scheme was proposed by combining a linear dispersion code with optical spatial modulation. The principles of generalized space-time dispersion matrix mapping and pulse position modulation mapping were introduced in detail. In addition

Signal detection was performed by using a sphere decoding algorithm. The theoretical bit error rate (BER) expression for the GSTPPM scheme was derived

and the performance of the proposed scheme was compared with existing optical spatial modulation schemes by using the Monte Carlo method. When the number of lasers and the modulation order are fixed

the results show that the transmission rate of the GSTPPM scheme is significantly higher than that of spatial multiplexing

spatial pulse position modulation (SPPM)

and generalized spatial pulse position modulation (GSPPM). At the same transmission rate

the BER of (2

4)-GSTPPM is clearly superior than that of (32

4)-SPPM and (5

4)-GSPPM. When BER=10

-3

GSTPPM scheme improves the signal-to-noise ratio by approximately 7 dB and approximately 5.5 dB

respectively.

关键词

Keywords

references

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