M分布星地激光通信链路相干正交频分复用系统误码性能研究

王怡; 王亚萍

doi:10.11959/j.issn.1000-436x.2020197

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M分布星地激光通信链路相干正交频分复用系统误码性能研究

学术论文 | 更新时间：2024-06-05

- M分布星地激光通信链路相干正交频分复用系统误码性能研究
- Research on the system error performance of coherent orthogonal frequency division multiplexing system with M-distribution in satellite-to-ground laser communication
- 通信学报 2020年41卷第10期页码：179-187
- 作者机构：
  
  1. 中国计量大学信息工程学院，浙江省电磁波信息技术与计量检测重点实验室，浙江杭州 310018
  2. 成都理工大学地质灾害防治与地质环境保护国家重点实验室，四川成都 610059
- 作者简介：
  
  [ "王怡（1980- ），女，黑龙江哈尔滨人，博士，中国计量大学教授，主要研究方向为自由空间光通信、石油矿山光信息探测、海洋光信息感知等" ]
  [ "王亚萍（1995- ），女，河南商丘人，中国计量大学硕士生，主要研究方向为自由空间光通信、星地激光通信" ]
- 基金信息：
  
  成都理工大学地质灾害防治与地质环境保护国家重点实验室开发基金资助项目(SKLGP2020K017);国家自然科学基金资助项目(51704267)
- DOI：10.11959/j.issn.1000-436x.2020197
  中图分类号： TN929.13
- 网络首发：2020-10，
  
  纸质出版：2020-10-25
- 稿件说明：
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王怡, 王亚萍. M分布星地激光通信链路相干正交频分复用系统误码性能研究[J]. 通信学报, 2020,41(10):179-187.

Yi WANG, Yaping WANG. Research on the system error performance of coherent orthogonal frequency division multiplexing system with M-distribution in satellite-to-ground laser communication[J]. Journal on Communications, 2020, 41(10): 179-187.
王怡, 王亚萍. M分布星地激光通信链路相干正交频分复用系统误码性能研究[J]. 通信学报, 2020,41(10):179-187. DOI： 10.11959/j.issn.1000-436x.2020197.

Yi WANG, Yaping WANG. Research on the system error performance of coherent orthogonal frequency division multiplexing system with M-distribution in satellite-to-ground laser communication[J]. Journal on Communications, 2020, 41(10): 179-187. DOI： 10.11959/j.issn.1000-436x.2020197.

摘要

为了缓解大气湍流对星地激光通信系统性能的影响，基于 M 分布大气信道模型，在星地激光通信上行链路和下行链路中提出了一种多载波相干正交频分复用（OFDM）调制系统，推导了星地激光通信上行链路和下行链路相干 OFDM 调制系统误码率的闭合表达式。在弱大气湍流和强大气湍流下，分别研究了天顶角、接收孔径、信噪比、最佳束散角以及最佳发射半径与系统误码率的关系，并与二进制相干差分相移键控（DPSK）调制进行比较。理论和仿真对比结果表明，星地激光通信系统中采用相干OFDM调制系统的误码性能优于相干DPSK调制系统。

Abstract

In order to alleviate the influence of atmospheric turbulence on the performance of satellite-to-ground laser communication system

based on the M-distribution atmospheric channel model

a multi-carrier coherent orthogonal frequency division multiplexing (OFDM) modulation system was proposed for uplink and downlink in the satellite-to-ground laser communication.The closed-form expression of bit error rate (BER) of coherent OFDM modulation system was derived.The relationship between the zenith angle

receiving aperture

signal-to-noise ratio (SNR)

optimal beam divergence angle

and optimal transmission radius and the BER were studied under weak

and strong atmosphere turbulence

and compared with binary coherent differential phase shift keying (DPSK) modulation.Both the theory and the simulation results show that compared with coherent DPSK modulation

the bit error performance of the coherent OFDM modulation system in the satellite-to-ground laser communication system is better.

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references

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