A 6-Band 12Gb/s IFoF/V-Band Fiber-Wireless Fronthaul Link Using an InP Externally Modulated Laser

Vaotonas, C.; Papaioannou, S.; Argyris, N.; Kanta, Konstantina; Iliadis, Nikos; Giannoulis, Giannis; Apostolopoulos, Dimitris; Avramopoulos, H.; Caillaud, Christophe; Debrégeas, H.; Kalfas, George; Pleros, N.

doi:10.1109/ecoc.2018.8535219

Cited by 17 publications

(8 citation statements)

References 11 publications

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“…Transforming the IF into the final wireless mmWave carrier signal can easily be performed at the aRRH by employing respective IF-to-RF and RF-to-IF upand down-conversion circuitry. Also, by drawing from the recent development of high-capacity EML-based Fiber-Wireless mmWave/IF a-RoF links [9], [10] and integrated Optical Beamforming Networks (OBFNs) [11], our proposed solution employs OBFNs to maintain the phase of mmWave beams through IF-subcarrier modulation, to replace some costly RF-processing with efficient photonic alternatives, and alleviating the need for complex DSP at the RRH. The OBFNs are followed by an opto-electronic conversion to an electrical IF signal and up-conversion to mmWave RF purely for wireless transmission, simplifying greatly the cell site equipment and simultaneously reducing its power consumption since ADC/DACs are no longer required [7].…”

Section: Statistical Capacity Is Improved Since Severalmentioning

confidence: 99%

“…3 form more cost-effective solution [9] but have been primarily used in digital communications and advanced modulation format transmissions with DSP techniques recovering the non-perfect linearity. However, joint optimizations of the Fiber-Wireless links have been scarce and constrained to the use of MZMs, few-channels or low bandwidths, and only very recently EMLs were shown to support multiple IF channels with user-rates >1Gb/s and aggregate capacities beyond 10Gb/s [10], satisfying the respective KPIs for multi-user 5G network environments. In order to achieve this, EMLs need to operate in the linear region of their transfer function, with a steep curve between two voltage values [10], for low signal distortion recoverable by simple DSP technique allowing to directly transfer the aggregate electrical analog IF signals to an a-RoF optical carrier with low signal distortion.…”

Section: High-linear External Modulated Lasers (Emls)mentioning

confidence: 99%

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Next Generation Fiber-Wireless Fronthaul for 5G mmWave Networks

et al. 2019

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MmWave radio, although instrumental for achieving the required 5G capacity Key Performance Indicators (KPIs), necessitates the need for a very large number of Access Points, which places an immense strain on the current network infrastructure. In this article, we try to identify the major challenges that inhibit the design of the Next Generation Fronthaul Interface in two upcoming distinctively highly dense environments: i) in Urban 5G deployments in metropolitan areas and ii) in ultra-dense Hotspot scenarios. Secondly, we propose a novel centralized and converged analog Fiber-Wireless Fronthaul architecture, specifically designed to facilitate mmWave access in the above scenarios. The proposed architecture leverages optical transceivers, optical add/drop multiplexers and optical beamforming integrated photonics towards a Digital Signal Processing analog fronthaul. The functional administration of the fronthaul infrastructure is achieved by means of a packetized Medium Transparent Dynamic Bandwidth Allocation protocol. Preliminary results show that the protocol can facilitate Gbps-enabled data transport while abiding to the 5G low-latency KPIs in various network traffic conditions.

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Section: Statistical Capacity Is Improved Since Severalmentioning

confidence: 99%

Section: High-linear External Modulated Lasers (Emls)mentioning

confidence: 99%

Next Generation Fiber-Wireless Fronthaul for 5G mmWave Networks

et al. 2019

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“…Since mm-wave signals occupy a very small portion of the optical bandwidth, linear RF phase shifts are achievable by using a linear photonic filter [20]. Research studies have demonstrated that RF-photonic technologies can perform a) low relative-intensity-noise lasers, and b) highly linear optical modulators and photo-detectors even at high power levels [21], [22]. All these aspects are significant when realizing high-performance RoF links with high SNR values.…”

Section: Problem Formulationmentioning

confidence: 99%

Hybrid Precoding for Millimeter Wave RoF Systems

Alghorani¹,

Ikki²

2020

Preprint

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<div>Large propagation path loss and limited scattering</div><div>of millimeter wave (mm-wave) channels create new challenges for physical layer signal processing. Hence, in this paper, we propose a photonic hybrid precoding model for mm-wave radio-over-fiber systems that overcomes hardware constraints on radio frequency precoding. With the help of analog photonic beamformers, the hybrid precoding strategy combats the large losses of mm-wave and mitigates inter-user interference, which in turn reduces the number of RF chains required to perform digital beamforming. The simulation results show that the proposed model can offer significant coding gains over conventional RF hybrid precoding systems. Unlike RF hybrid precoding systems, the photonic hybrid precoding systems can provide higher data rates and lower error rates in multi-user transmission scenarios.</div>

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“…So far, the IFoF-based fronthaul architectures supporting multiple frequency bands, evaluated only for the fiber part of the network have achieved CPRI equivalent rates up to 1 Tb/s per wavelength [25,36,37]. Moreover, converged FiWi IFoF demonstrations have been shown to reach capacities up to 45 Gb/s per wavelength when using simple quadrature amplitude modulation (QAM) formats and sub-carrier (SC) multiplexing of multiple IF bands [38][39][40][41]. Considering FiWi links using OFDM formats, the maximum capacity has been reported to be equal to 24.08 Gb/s, using a single RF band with a bandwidth of 6.02 GHz [42].…”

Section: Key Technologies For Analog-radio-over-fiber (A-rof) Fronthamentioning

confidence: 99%

A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms

et al. 2019

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Analog fronthauling is currently promoted as a bandwidth and energy-efficient solution that can meet the requirements of the Fifth Generation (5G) vision for low latency, high data rates and energy efficiency. In this paper, we propose an analog optical fronthaul 5G architecture, fully aligned with the emerging Centralized-Radio Access Network (C-RAN) concept. The proposed architecture exploits the wavelength division multiplexing (WDM) technique and multicarrier intermediate-frequency-over-fiber (IFoF) signal generation per wavelength in order to satisfy the demanding needs of hotspot areas. Particularly, the fronthaul link employs photonic integrated circuit (PIC)-based WDM optical transmitters (Txs) at the baseband unit (BBU), while novel reconfigurable optical add-drop multiplexers (ROADMs) cascaded in an optical bus are used at the remote radio head (RRH) site, to facilitate reconfigurable wavelength switching functionalities up to 4 wavelengths. An aggregate capacity of 96 Gb/s has been reported by exploiting two WDM links carrying multi-IF band orthogonal frequency division multiplexing (OFDM) signals at a baud rate of 0.5 Gbd with sub-carrier (SC) modulation of 64-QAM. All signals exhibited error vector magnitude (EVM) values within the acceptable 3rd Generation Partnership Project (3GPP) limits of 8%. The longest reach to place the BBU away from the hotspot was also investigated, revealing acceptable EVM performance for fiber lengths up to 4.8 km.

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A 6-Band 12Gb/s IFoF/V-Band Fiber-Wireless Fronthaul Link Using an InP Externally Modulated Laser

Cited by 17 publications

References 11 publications

Next Generation Fiber-Wireless Fronthaul for 5G mmWave Networks

Next Generation Fiber-Wireless Fronthaul for 5G mmWave Networks

Hybrid Precoding for Millimeter Wave RoF Systems

A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms

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