Frequency division multiplexing for very high capacity transmission in bandwidth-limited systems

Gatto, Alberto; Parolari, P.; Boffi, Pierpaolo

doi:10.1364/ofc.2017.w1k.1

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…In the last couple of decades, different methods have been proposed to tackle the capacity limitation associated with the traffic growth of fiber optic systems. For example, advanced modulation schemes and bandwidth utilization enhancement techniques such as TDM and WDM and Polarization Division Multiplexing (PDM) and Frequency Division Multiplexing (FDM) [8]. Recently, a promising approach is proposed to overcome the limits of SMF.…”

Section: Introductionmentioning

confidence: 99%

International Journal of Electronics and Telecommunications

Al-dawoodi¹,

Fareed²,

Masuda³

et al. 2018

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Nonlinearities in optical fibers deteriorate system performances and become a major performancelimiting issue. This article aims to investigate the compensation of nonlinear distortions in optical communication systems based on different wavelength propagations over few-mode fiber (FMF). The study adopted Space Division Multiplexing (SDM) based on decision feedback equalizer (DFE). Various transmission wavelength of the FMF system is applied to mitigate the attenuation effect on the system. In this paper, different wavelengths (780, 850 and 1550 nm) are used in SDM. Extensive simulation is performed to assess the attenuation and Bit Error Rate (BER) in each case. The results show that the wavelength of 1550 nm produces higher power and less attenuation in the transmission. Furthermore, this wavelength produces the best distance with less BER compared to 780 nm and 850 nm wavelengths. Moreover, the validations show improvement in BER and eye diagram.

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Section: Introductionmentioning

confidence: 99%

International Journal of Electronics and Telecommunications

Al-dawoodi¹,

Fareed²,

Masuda³

et al. 2018

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“…On the other hand, frequency division multiplexing (FDM) [4] appears as an interesting alternative thanks to its intrinsic flexibility in terms of subcarriers allocation and modulation. In particular, when multiple access is considered, FDM can be particularly interesting because just one subcarrier or a subset of subcarriers can be devoted to individual users and applications services.…”

Section: Introductionmentioning

confidence: 99%

FDM exploitation for next access and data networks

Gatto

Parolari

Boffi

2017

2017 19th International Conference on Transparent Optical Networks (ICTON)

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“…Though several kinds of research focused on reducing latency are carried out recently [11], [12], the latency will increase with the number of RRUs. The FDM technology seems like a promising solution due to its advantage of low complexity and efficient realization of multiple users [13]. The multiplexing of FDM could be carried out in the optical domain or digital domain.…”

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confidence: 99%

245Gb/s P2MP Mobile Fronthaul Downstream Transmission Using Code-Division Multiplexing and Self-Homodyne Coherent Technologies

et al. 2022

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We have proposed and experimentally demonstrated a high-speed and point-to-multipoint (P2MP) mobile fronthaul (MFH) downstream system based on the code-division multiplexing (CDM) and self-homodyne coherent (SHC) technologies. We find that compared with the traditional 16-ary quadrature amplitude modulation (16-QAM) signal transmission, the change of phase noise between two demultiplexed symbols is much larger in the CDM-16QAM signal transmission because it is the accumulation of phase noise change of n multiplexed symbols. Therefore, a low-complexity pilot sequence-assisted phase noise estimation algorithm is proposed and designed to compensate for the phase noise caused by fiber mismatch length, which makes it possible to use a low-cost distributed feedback (DFB) laser. Besides, the spread signal's distribution in the frequency domain of each code sequence is different, leading to different transmission performances between different remote radio units (RRUs). A power optimization scheme is proposed to balance the transmission performances of different RRUs by multiplying each channel's signal by a normalized weight factor at the transmitter. The experimental results show that the proposed system could successfully support the transmission of 245 Gb/s 16QAM signal from baseband unit (BBU) to 7 RRUs (each RRU could have 2 antennas to transmit signals at 2 polarizations) over 10 km standard single-mode fiber (SSMF). The measured worst bit error rate (BER) value of 14 channels is 1.77e-3 which is below the hard-decision forward error correction (HD-FEC) threshold (3.8e-3).

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Frequency division multiplexing for very high capacity transmission in bandwidth-limited systems

Abstract: FDM is shown to achieve high capacity facing system bandwidth limitations and exploiting its flexibility to allocate the subcarriers, also with an effective combination with MDM, in different applications, including PONs and mobile fronthaul.

Cited by 7 publications

References 7 publications

International Journal of Electronics and Telecommunications

International Journal of Electronics and Telecommunications

FDM exploitation for next access and data networks

245Gb/s P2MP Mobile Fronthaul Downstream Transmission Using Code-Division Multiplexing and Self-Homodyne Coherent Technologies

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