תמונות העטיפה

Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution

שמור ב:
הוצא לאור ב:Photonics vol. 12, no. 5 (2025), p. 419
מחבר ראשי: Li, Kuang
מחברים אחרים: Zhao Yingkai, Li Kangjian, Wang Xingfa, Li, Linyi, Zhu Huishi, Zhang, Weijie, Liu, Jianguo
יצא לאור:
MDPI AG
נושאים:
Wireless communications
Field tests
Poisson distribution
Algorithms
Maximum likelihood decoding
Error correction
Elevation angle
Optimization
Signal processing
Line of sight
Computer simulation
Bit error rate
Codes
Monte Carlo simulation
Communications systems
Methods
Light
Error correcting codes
גישה מקוונת:Citation/Abstract
Full Text + Graphics
Full Text - PDF
תגים: הוספת תג
אין תגיות, היה/י הראשונ/ה לתייג את הרשומה!
Resumen:This study focuses on a 4FSK-modulated ultraviolet (UV) communication system, introducing an innovative symbol-level maximum likelihood decoding approach based on Poisson statistics. A forward error correction (FEC) coding mechanism is integrated to enhance system robustness. Through Monte Carlo simulations, the proposed decoding scheme and the error correction performances of Reed–Solomon (RS) and Low-Density Parity-Check (LDPC) codes are evaluated in UV channels. Both RS and LDPC codes significantly improve the Bit Error Rate (BER), with LDPC codes achieving superior gains under low SNR conditions. Hardware implementation and field tests validate the decoding algorithm and LDPC-optimized 4FSK system. Under non-line-of-sight (NLOS) conditions (10–45° transmit elevation angle), stable 60 m communication with BER < 10−3 is achieved. In line-of-sight (LOS) scenarios, the system demonstrates 900 m range with BER < 10−3, highlighting practical applicability in challenging atmospheric environments.
ISSN:2304-6732
DOI:10.3390/photonics12050419
Fuente:Advanced Technologies & Aerospace Database