A Hybrid Millimeter-Wave and Free-Space-Optics Communication Architecture with Adaptive Diversity Combining and HARQ Techniques

We propose and demonstrate a hybrid communication architecture that combines millimeter-wave (MMW) in the radio frequency (RF) domain and free-space-optics (FSO) technologies using adaptive combining and hybrid automatic repeat request (HARQ) techniques. At the receiving end, we employed joint signa...

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Bibliographic Details
Published inPhotonics Vol. 10; no. 12; p. 1320
Main Authors Liu, Yinjun, Tan, Xiaochuan, Jia, Junlian, Dong, Boyu, Huang, Changle, Luo, Penghao, Shi, Jianyang, Chi, Nan, Zhang, Junwen
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2023
Subjects
Algorithms
Atmospheric turbulence
Automatic repeat request
Codes
Communications systems
Data transmission
Error correction
Error correction & detection
Free space optics
free-space-optics (FSO) communications
hybrid automatic repeat request (HARQ)
maximum ratio combining (MRC)
Methods
Millimeter waves
millimeter-wave (MMW) communications
Optics
Outages
Quadrature phase shift keying
Radio frequency
Satellites
Signal processing
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Summary:We propose and demonstrate a hybrid communication architecture that combines millimeter-wave (MMW) in the radio frequency (RF) domain and free-space-optics (FSO) technologies using adaptive combining and hybrid automatic repeat request (HARQ) techniques. At the receiving end, we employed joint signal processing with an adaptive diversity combining technique (ADCT) based on a maximum ratio combining (MRC) algorithm. We derived closed-form expressions for the outage probability and throughput of the hybrid RF and FSO (RF/FSO) system, considering various characteristics of atmospheric turbulence in the FSO link. Experimental testing with 10-Gbaud quadrature phase shift keying (QPSK) data was conducted under different simulated atmospheric turbulence intensities, FSO and MMW speed-ratios, and forward error correction (FEC) overheads. Additionally, we validated improvements in terms of bit error ratio (BER), outage probability, and throughput performance.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics10121320