24–26  GHz radio-over-fiber and free-space optics for fifth-generation systems

Bohata, Jan; Komanec, Matěj; Spáčil, Jan; Ghassemlooy, Zabih; Zvánovec, Stanislav; Slavı́k, Radan

doi:10.1364/ol.43.001035

Cited by 67 publications

(44 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As can be seen, the EVM penalties are relatively small; this is because the generated turbulence is moderate turbulence. However, for strong turbulence (i.e., C 2 n of 2.4×10 −10 m −2/3 as in [13]), the EVM penalty was about 4% compared with no turbulence. We also evaluate the calculated BER of the M-QAM hybrid MPL based on the EVM as given by [1,3]:…”

Section: Configuration Amentioning

confidence: 96%

“…In 2016, 4 Gb/s 16-QAM-OFDM signal at 60 GHz was transmitted over 1.83 m FSO and RF wireless links and evaluated with synthesized weather conditions i.e., fog, rain and turbulence [12]. In 2018, we demonstrated 100 MHz 64-QAM transmission at different carrier frequencies of 24-26 GHz using a low-cost directly modulated laser over 2 m turbulent FSO and 3.6 m RF wireless links with the lowest measured EVM of 4.7% [13]. Very recently, the transmission of 1 Gbaud 16-QAM at 28 GHz over a 0.9 m FSO channel with dust and a 1 m RF wireless link was demonstrated with a bit error rate (BER) well below the hard-decision forward-error-correction (HD-FEC) limit of 3.8×10 −3 [14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

M-QAM transmission over hybrid microwave photonic links at the K-band

Nguyen¹,

Bohata²,

Spáčil³

et al. 2019

Opt. Express

Self Cite

View full text Add to dashboard Cite

Two experimental configurations of a hybrid K-band (25 GHz) microwave photonic link (MPL) are investigated for seamless broadband wireless access networks. Experimental configurations consist of optical fiber, free-space optics (FSO) and radio frequency (RF) wireless channels. We analyze in detail the effects of channel impairments, namely fiber chromatic dispersion, atmospheric turbulence and multipath-induced fading on the transmission performance. In the first configuration, transmission of the 64-quadrature amplitude modulation (QAM) signal with 5, 20 and 50 MHz bandwidths over 5 km standard single-mode fiber (SSMF), 2 m turbulent FSO and 3 m RF wireless channels is investigated. We show that, for QAM with a high bandwidth, the link performance is being affected more by atmospheric turbulence. In the second configuration, the 20 MHz 4/16/64-QAM signals over a 50 km SSMF and 40 m FSO/RF wireless links are successfully transmitted with the measured error vector magnitude (EVM) values of 12, 9 and 7.9%, respectively. It is shown that, for all transmitted microwave vector signals, the bit error rate is lower than the hard-decision forward-error-correction limit of 3.8×10 −3. Moreover, an extended FSO link span of 500 m for 25 GHz hybrid MPL with 16-QAM at 10 Gb/s under the weak and strong turbulence regimes is evaluated via simulation analysis to mimic a practical outdoor system.

show abstract

Section: Configuration Amentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

M-QAM transmission over hybrid microwave photonic links at the K-band

Nguyen¹,

Bohata²,

Spáčil³

et al. 2019

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…We then have used a FSO transmitter to launch the light beam to the free-space of a 500 m link span, which represents a typical distance in urban areas for access networks. Note that, both FSO transceivers used have an aperture diameter of 2.54 cm, in order to be consistent with our experimental FSO links [10,22]. We investigate the link performance with the FSO channel set with clear (i.e., attenuation of 0.2 dB/km) and weakto-moderate turbulence conditions.…”

Section: Atmospheric Turbulence Modelmentioning

confidence: 99%

Mitigation of dispersion and turbulence in a hybrid optical fibre and free-space optics link using electronic equalisation

Nguyen

Zvánovec

Ghassemlooy

2019

Optik

Self Cite

View full text Add to dashboard Cite

Transmission of a 25 Gbps non-return to zero signal over a hybrid link of 20 km standard single-mode fibre and 500 m free-space optics under weak-to-moderate turbulence regimes is demonstrated via simulation to provide a practical solution for the last-mile access networks. Even though there are several complex mitigating methods to reduce the waveform distortions caused by both the fibre chromatic dispersion and atmospheric turbulence, we provide and discuss a simple approach using an electrical equalizer at the receiver. The simulation results demonstrate that, the proposed equalization technique offer about an order of magnitude improvement in the bit error rate at the received optical power of-20 dBm and a receiver sensitivity gain of 1.5 dB at the 7% forward error correction limit.

show abstract

“…3c) has three blocks: the gain control block, OE/EO conversion block, and IF-Mux block. The IF-Mux block performs the subcarrier (de-)multiplexing (SCM) of two IFband signals in order to double the transmission capacity per wavelength [12]. For this, we utilized the RF-mixers driven by 6 GHz local oscillator (LO) signal that is produced by the phase locked loop (PLL)-integrated voltage-controlled oscillator (VCO).…”

Section: Figurementioning

confidence: 99%

“…a tens of GHz) photonic devices (e.g. electro-optic modulators and wideband photodiodes) that increase the system cost [12]. Moreover, the dispersion-induced RF power fading degrades the quality of signal at mmWave bands [13].…”

Section: Introductionmentioning

confidence: 99%

Coverage Extension of Indoor 5G Network Using RoF-Based Distributed Antenna System

et al. 2020

View full text Add to dashboard Cite

We propose and demonstrate a cascaded distributed antenna system (DAS) for efficiently extending the coverage of the mmWave-based 5G indoor network. For this, we exploit the radio-over-fiber (RoF) system based on the intermediate-frequency-over-fiber (IFoF) transmission technique that is enabled to add/drop the specific wavelength to the designated remote antenna unit (RAU) with using optical splitters and coarse wavelength division multiplexing (CWDM) filters. Moreover, the IFoF transceivers (TRx) perform the subcarrier multiplexing (SCM) in order to transmit 2×8 frequency allocation (FA) 5G signals per a single optical carrier, where each FA has 100 MHz bandwidth, leading each RAU to support 2×2 MIMO operation. Consequently, the cascaded structure allows for the adaptive and flexible configuration of the order of MIMO in accordance of the required data throughput at the specific indoor area. We introduce the cascaded IFoF link structure that can support up-to 13.5 dB optical power budget with following error-vector-magnitude (EVM) performance characterizations. And then we experimentally demonstrate the RoF-based cascaded DAS network, showing that more than 1 Gb/s total throughput can be achieved per a single antenna. Furthermore, we examine the use of avalanche photodiode (APD) to further increase the optical power budget (i.e., the coverage) based on experiment as well as simulation.

show abstract

24–26 GHz radio-over-fiber and free-space optics for fifth-generation systems

Cited by 67 publications

References 10 publications

M-QAM transmission over hybrid microwave photonic links at the K-band

M-QAM transmission over hybrid microwave photonic links at the K-band

Mitigation of dispersion and turbulence in a hybrid optical fibre and free-space optics link using electronic equalisation

Coverage Extension of Indoor 5G Network Using RoF-Based Distributed Antenna System

Contact Info

Product

Resources

About