WDM-PON Free Space Optical (FSO) System Utilizing LDPC Decoding for Enhanced Cellular C-RAN Fronthaul Networks

被引：1
作者：
Alqahtani, Dokhyl [1 ]
El-Nahal, Fady [2 ,3 ]
机构：
[1] Prince Sattam Bin Abdulaziz Univ, Coll Engn, Elect Engn, Al Kharj 11942, Saudi Arabia
[2] Tech Univ Munich, Inst Commun Engn, D-80290 Munich, Germany
[3] Islamic Univ Gaza, Dept Elect Engn, POB 108, Gaza, Palestine
来源：
PHOTONICS | 2025年 / 12卷 / 04期
关键词：
free space optics (FSO); centralized radio access network (C-RAN); passive optical network (PON); low-density parity-check (LDPC) decoding; COMMUNICATION; ERROR;
D O I：
10.3390/photonics12040391
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Modern cellular systems rely on high-capacity and low-latency optical networks to meet ever-increasing data demands. Centralized Radio Access Network (C-RAN) architectures offer a cost-effective approach for deploying mobile infrastructures. In this work, we propose a flexible and cost-efficient fronthaul topology that combines Wavelength Division Multiplexing (WDM) passive optical networks (PONs) with free-space optical (FSO) links. To enhance overall system performance, we introduce Low-Density Parity Check (LDPC) decoding, which provides robust error-correction capabilities against atmospheric turbulence and noise. Our system transmits 20 Gbps, 16-QAM intensity-modulated orthogonal frequency-division multiplexing (OFDM) signals, achieving a substantial reduction in bit error rate (BER). Numerical results show that the proposed WDM-PON-FSO architecture, augmented with LDPC decoding, maintains reliable transmission over 2 km under strong turbulence conditions.
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页数：14
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