Design and implementation of PPM modulation and demodulation algorithm in atmospheric turbulence channel

Haoyu Zhang; Yuying Mei; Yadi Chen; Zhe Xie; Bing Lei

doi:10.1117/12.3007672

18 December 2023 Design and implementation of PPM modulation and demodulation algorithm in atmospheric turbulence channel

Haoyu Zhang, Yuying Mei, Yadi Chen, Zhe Xie, Bing Lei

Author Affiliations +

Proceedings Volume 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration; 129590V (2023) https://doi.org/10.1117/12.3007672
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

A pulse position modulation (PPM) algorithm is designed and implemented to counter atmospheric turbulence interference in free-space optical (FSO) communication. A homemade turbulence simulation device based on thermal wind has been constructed to simulated a atmospheric turbulence channel, and it has been utilized to check the performance of the FSO communication system in atmospheric turbulence conditions. Both the signal modulation schemes of 4-ary pulse position modulation (4-PPM) and non-return-to-zero (NRZ) on-off keying (OOK) are implemented and compared in the system, and their corresponding modulation and demodulation algorithms have been realized using the field-programmable gate arrays (FPGA). To verify the effectiveness and practical performance of the PPM algorithm, extensive experiments have been carried out on the FSO communication system under laboratory- simulated atmospheric turbulence conditions, and the bit error rates (BER) of the PPM and OOK modulation schemes have been obtained and compared. The experimental results in the simulating atmospheric turbulence channel show that the PPM modulation system designed in this study yields a lower BER than the OOK modulation system under different turbulence intensities. Furthermore, as the turbulence intensity increases, the BER’s improvement of the PPM modulation system becomes more remarkable. The research results indicate the FSO communication system with PPM modulation possesses superior performance in an atmospheric turbulence channel.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haoyu Zhang, Yuying Mei, Yadi Chen, Zhe Xie, and Bing Lei "Design and implementation of PPM modulation and demodulation algorithm in atmospheric turbulence channel", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 129590V (18 December 2023); https://doi.org/10.1117/12.3007672

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Modulation

Atmospheric turbulence

Turbulence

Free space optics

Clocks

Field programmable gate arrays

Demodulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years