Content area
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.
Details
Atmospheric turbulence;
Topology;
Wave division multiplexing;
Atmospheric correction;
Error correction & detection;
Parity;
Low density parity check codes;
Bandwidths;
Error correction;
Signal processing;
Network latency;
Bit error rate;
Codes;
Error reduction;
Algorithms;
Latency;
Error correcting codes;
Orthogonal Frequency Division Multiplexing;
Free space optics;
Wavelength division multiplexing
1 Electrical Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
2 Institute for Communications Engineering, Technical University of Munich, 80290 Munich, Germany; [email protected], Department of Electrical Engineering, Islamic University of Gaza, Gaza P.O. Box 108, Palestine