Full-Duplex Transmission of Nyquist-SCM Signal over a Seamless Bidirectional Fiber–Wireless System in W-Band

Dat, Pham Tien; Kanno, Atsushi; Yamamoto, Naokatsu; Dien, Nguyen Van; Hùng, Nguyễn Tấn; Kawanishi, Tetsuya

doi:10.1364/ofc.2019.w1i.5

Cited by 13 publications

(4 citation statements)

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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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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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“…Comparing with the structures shown in Refs. [36] and [37], the only difference is the injection-locked colorless laser diode with polarization control for replacing the external modulator. It is worth noting that modulating a data with an external modulator suffers from large power loss and device cost.…”

Section: B Fiber Wireline Transmission Of Orthogonally Polarized Multi-color Source With Scm Of Narrow-band Bit-loaded M-qam Dmt For Multmentioning

confidence: 99%

Multi-Color Laser Diode Heterodyned 28-GHz Millimeter-Wave Carrier Encoded With DMT for 5G Wireless Mobile Networks

et al. 2019

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By using a multi-color laser diode carrier with orthogonal polarization and single-carrier modulation, the long-reach single-mode fiber (SMF) passive optical network and millimeter-wave wireless access network (WAN) with carrying narrow-band and channelized discrete multitone (DMT) data format at >1 Gbit/s/channel are demonstrated for 5G wireless mobile applications. For fiber wireline transmission from central office to remote node, the multi-color laser diode is directly encoded by DMT with quadrature amplitude modulation (QAM) levels ranged from 64 to 1024, and the total raw data rate of the received DMT can maintain as high as 88 Gbit/s at a limit modulation bandwidth of 9.125 GHz. The allowable data band consisting of 0.07-6 GHz for 1024 QAM, 6-9 GHz for 512 QAM and 9-9.125 GHz for 256 QAM is achieved even after long-reach transmission in 75-km-long SMF spool. For wireless transmission from remote node to user end with 28-GHz millimeter-wave carrier after optical heterodyne, the wireless transmission distance can lengthen up to 10 meters with allowable data capacity optimized to 29.6 Gbit/s with a modulation bandwidth of 4.1 GHz in total. Consequently, the achievable bit-loaded data band is 256 QAM within 0.07-2.5 GHz and 64 QAM within 2.5-4.1 GHz for 5G mobile WAN transmission via horn antenna pair. INDEX TERMSThe fifth generation (5G) access network, multi-color, injection-locked colorless laser diode, optical heterodyne, single-carrier modulation (SCM), orthogonal polarization, millimeter-wave over fiber (MMWoF), DMT, chromatic dispersion.

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“…However, the impacts of digital SCM technology are only investigated in optical fiber transmission systems [7]. The seamless full-duplex fiber-wireless system in the W-band for SCM signal transmission is reported in [8], but the nonlinear tolerance of digital SCM technology has not been investigated. In [9], the nonlinear tolerance of orthogonal frequency-division multiplexing (OFDM) and Nyquist-SCM signals against power amplifier (PA) saturation is only studied by simulated analysis.…”

Section: Introductionmentioning

confidence: 99%

Experimental Comparison of Single-Carrier and Digital Subcarrier Multiplexing Transmissions in a W-Band 200 Gb/s Fiber-Wireless System Considering Transmitter IQ Imbalance and Skew Mitigation

et al. 2023

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In fiber-wireless integration systems, it is valuable to investigate whether digital subcarrier multiplexing (SCM) signal is effective in improving nonlinear tolerance against photodiode (PD) saturation compared to single-carrier (SC) signal. For a fair comparison, the mitigation of linear impairments especially for IQ mixing effects become significant. In this article, we first analyze the impacts of transmitter IQ mixing effects for SC and digital SCM signals. Then, we employ the real-valued multiple-input multiple-output (MIMO) post-equalizers for the PM (polarization multiplexing)-SC system and PM-SCM system so as to mitigate transmitter IQ mixing effects. Finally, we experimentally compare the nonlinear tolerance of SC, SCM with two subcarriers (SCM-2), and SCM-4 signals using QPSK, 8QAM, and 16QAM in a Wband fiber-wireless system against the pin-photodiode (PIN-PD) saturation considering noise-limited case, optimum case and nonlinear case. Subcarriers for SC, SCM-2, and SCM-4 are 25GBaud, 12.5GBaud, and 6.25GBaud respectively, with a total symbol rate of 25GBaud. Maximum line rate is 200 Gb/s with the BER satisfying the 7% HD-FEC threshold when employing the PM-16QAM. The results show that SCM signal has better nonlinear tolerance against the PIN-PD saturation than SC signals when system works in Manuscript

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Full-Duplex Transmission of Nyquist-SCM Signal over a Seamless Bidirectional Fiber–Wireless System in W-Band

Cited by 13 publications

References 1 publication

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

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

Multi-Color Laser Diode Heterodyned 28-GHz Millimeter-Wave Carrier Encoded With DMT for 5G Wireless Mobile Networks

Experimental Comparison of Single-Carrier and Digital Subcarrier Multiplexing Transmissions in a W-Band 200 Gb/s Fiber-Wireless System Considering Transmitter IQ Imbalance and Skew Mitigation

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