Reconfigurable Fiber Wireless IFoF Fronthaul With 60 GHz Phased Array Antenna and Silicon Photonic ROADM for 5G mmWave C-RANs

Tsakyridis, Apostolos; Ruggeri, Eugenio; Kalfas, George; Oldenbeuving, Ruud M.; Dijk, P.W.L. van; Roeloffzen, C.G.H.; Leiba, Yigal; Miliou, Amalia; Pleros, Nikos; Vagionas, Christos

doi:10.1109/jsac.2021.3064649

Cited by 23 publications

(8 citation statements)

References 58 publications

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“…3, we summarize performances of reported lattice filters and our devices. It is worthy to note that some of these devices utilize specially-developed processing conditions to realize superiorities in temperature insensitivity [15], polarization insensitivity [16,17], reconfigurability [18], etc. By utilizing the standard processing flow provided by foundry, our devices provide performances comparable to previously reported devices in terms of the insertion loss and the crosstalk.…”

Section: Discussionmentioning

confidence: 99%

“…For example, a silicon 4-channel CWDM filter is demonstrated by utilizing dispersion-engineered MZIs to improve the crosstalk and the fabrication tolerance [14]. In addition, lattice-filterbased (de-)multiplexers with superiorities in temperature insensitivity [15], polarization insensitivity [16,17] and reconfigurability [18] have also been well studied.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Silicon Lattice-Filter-Based O-Band 1×8 (De)Multiplexers With Flat and Gaussian-Like Passbands

Ning

Wang

et al. 2022

IEEE Photonics J.

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Based on cascaded Mach-Zehnder interferometer (MZI) lattice filters, we demonstrate and compare silicon O-band 8-channel (de-)multiplexers with flat and Gaussian-like passbands for the 400 GBASE-LR8 norm. The 1×8 (de-)multiplexer with flat passbands exhibit insertion loss less than 2.5 dB, channel crosstalk lower than -11 dB, and 3 dB bandwidths of ~3.9 nm. In contrast, the maximum insertion loss, the worst channel crosstalk, and 3 dB bandwidths of the 1×8 (de-)multiplexer with Gaussian-like passbands are 1.1 dB, -13 dB, and ~2.9 nm, respectively. The comparison result indicates that the latter is more advisable choice. A theoretical calculation based on measured coupling ratios of stand-along directional couplers (DC) indicates that the performance deteriorations of practical filtering curves are mainly caused by dispersions and fabrication errors of the DCs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Silicon Lattice-Filter-Based O-Band 1×8 (De)Multiplexers With Flat and Gaussian-Like Passbands

Ning

Wang

et al. 2022

IEEE Photonics J.

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“…It should be noted that if we directly connect antenna sites to CO, numerous long optical fibers need to be installed, which is obviously an expensive solution; however, in this architecture, since a single fiber can be shared by transmitting multiple signals to a specific location, we can reduce the deployment cost associated with fiber installations. Of course, wavelength division multiplexing (WDM) can also support such a point-tomultipoint architecture [31]. Especially coarse (C)WDM offers a simpler solution when the number of antenna sites is small.…”

Section: Architecture Of Hybrid Ifof and Rof Mfhmentioning

confidence: 99%

End-to-End Demonstration of Fiber-Wireless Fronthaul Networks Using a Hybrid Multi-IF-Over-Fiber and Radio-Over-Fiber System

et al. 2021

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This paper reports an end-to-end demonstration of a fiber-wireless mobile fronthaul (MFH) network based on hybrid intermediate-frequency-over-fiber (IFoF) and radio-over-fiber (RoF) links using a 28-GHz millimeter-wave (MMW) band. We successfully transmitted 24 64-QAM OFDM signals with a total bandwidth of 9.12 GHz over 20-km broadband IFoF, 1-km narrowband IFoF, 500-m RoF, and 10-m free-space links with an aggregate capacity of up to 34.2 Gbps, which complies with the required peak data capacity of IMT-2020. A digital demultiplexer was exploited to flexibly perform channel selection and frequency conversion. The obtained results show the feasibility of implementing fiber-wireless systems with the hybrid IFoF/RoF links for future mobile fronthaul networks.

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“…Then, in (Li et al, 2019), the nonlinear phase shift introduced by a highly non-linear fiber is used to introduce delay over radio frequency (RF) modulated optical signals, which can be varied by controlling the optical power of each carrier passing through a parallel arrangement of highly nonlinear fibers. Meanwhile, in (Tsakyridis et al, 2021), a bandwidthreconfigurable intermediate frequency over fiber fronthaul is integrated using silicon photonic reconfigurable optical add/drop multiplexer (ROADM) with phase-shifter based 60 GHz phased array antenna, supporting a 32-element phased array antenna. However, the above techniques either focuses on the RIS application (Huang et al, 2021) or employs the phase-shifting based analogue beamforming, resulting in the detrimental beamsquinting phenomenon in the context of wide-band signal (Li et al, 2019;Tsakyridis et al, 2021), which is not suitable for wide-band C-RAN with compact-size RRH serving multi-user communications.…”

Section: Overview Of Radio Over Fiber Aided Beamformingmentioning

confidence: 99%

Analog Radio Over Fiber Aided C-RAN: Optical Aided Beamforming for Multi-User Adaptive MIMO Design

Ghafoor

Butt

et al. 2021

Front. Comms. Net.

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Given the increasing demand for high data-rate, high-performance wireless communications services, the demand on the radio access networks (RAN) has been increasing significantly, where optical fiber has been widely used both for the backhaul and fronthaul. Additionally, advances in signal processing such as multiple-input multiple-output (MIMO) techniques, have improved the performance as well as transmission rate of communications networks. Beamforming has been used as an efficient MIMO technique for providing a signal to noise ratio (SNR) gain as well as reducing the multi-user interference. However, beamforming requires the employment of phase-shifters, which suffers from reduced phase resolutions, degraded noise figures as well as beam-squinting in addition to the implementation challenges. Hence, in this paper we employ an analogue radio over fiber (A-RoF) aided architecture for supporting the requirements of the current and future mobile networks, where we design a photonics aided beamforming technique in order to eliminate the bulky electronic phase-shifters and the beam-squinting effect, while also providing a low-cost RAN solution. Additionally, this photonics aided beamforming is combined with a reconfigurable multi-user MIMO technique, where users can communicate with one or multiple remote radio heads (RRHs), while employing stand-alone beamforming, beamforming combined with diversity or with multiplexing depending on the available resources and the user channel information as well as the quality of service requirements.

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Reconfigurable Fiber Wireless IFoF Fronthaul With 60 GHz Phased Array Antenna and Silicon Photonic ROADM for 5G mmWave C-RANs

Cited by 23 publications

References 58 publications

Comparison of Silicon Lattice-Filter-Based O-Band 1×8 (De)Multiplexers With Flat and Gaussian-Like Passbands

Comparison of Silicon Lattice-Filter-Based O-Band 1×8 (De)Multiplexers With Flat and Gaussian-Like Passbands

End-to-End Demonstration of Fiber-Wireless Fronthaul Networks Using a Hybrid Multi-IF-Over-Fiber and Radio-Over-Fiber System

Analog Radio Over Fiber Aided C-RAN: Optical Aided Beamforming for Multi-User Adaptive MIMO Design

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