Multi-band CAP for Next-Generation Optical Access Networks Using 10-G Optics

Wei, Jinlong

doi:10.1109/jlt.2017.2772894

Cited by 34 publications

(22 citation statements)

References 31 publications

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“…In a comparative study performed in [2], CAP modulation was shown to outperform OFDM over the same physical link, supporting a data rate of ∼3.22 Gb/s, in comparison to the ∼2.93 Gb/s available with OFDM, with the biterror rate (BER) of both being approximately 10 −4 [2]. On the other hand, the additional 10% data rate improvement comes at the cost of system complexity as CAP is generated using two finite impulse response (FIR) filters at the transmitter (one each for the in-phase and the quadrature), and two corresponding matched FIR filters at the receiver [5,6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Nyquist Pulse Shapes for Carrierless Amplitude and Phase Modulation in Visible Light Communications

Haigh

Chvojka

Zvánovec

et al. 2018

J. Lightwave Technol.

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Abstract-This paper proposes and experimentally demonstrates, for the first time, two new candidate pulse shapes for carrier-less amplitude and phase modulation in the context of visible light communications. It is commonly accepted that the pulse shape at the heart of the Hilbert pair used to generate the required orthogonal signal spaces should be the square-root raised cosine. In this work, we introduce two additional candidate pulse shapes, namely the first-order Xia pulse and the socalled better-than-Nyquist pulse. We demonstrate experimentally that the better-than-Nyquist pulse offers superior bit-error rate performance compared to the square-root raised cosine and Xia pulses under additive white Gaussian noise channel conditions, whilst offering lower computational complexity.

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Section: Introductionmentioning

confidence: 99%

Analysis of Nyquist Pulse Shapes for Carrierless Amplitude and Phase Modulation in Visible Light Communications

Haigh

Chvojka

Zvánovec

et al. 2018

J. Lightwave Technol.

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“…Recently, emerging services such as 4K/8K, 5G and virtual reality (VR)/ augmented reality (AR) have imposed challenging demands on passive optical networks (PONs) [1][2][3][4][5][6]. The future PONs should be able to provide on-demand modifications of traffic transmission policies through network re-configurability, flexibility and elasticity.…”

Section: Introductionmentioning

confidence: 99%

“…In order to obtain higher throughput and larger capacity, researchers have tried different techniques for advanced modulation in PON transmissions, such as the quadrature amplitude modulation (QAM), pulse amplitude modulation (PAM) or the phase shift keying (PSK) based sub-carrier modulation (SCM) [8], the orthogonal frequency division multiplexing (OFDM) [5,9], and the carrier-less amplitude/phase modulation (CAP) [2][3][4][10][11][12]. Among these different methods, multi-band CAP (multi-CAP) using intensity modulation and direct detection was proposed as a feasible solution for next generation PON due to its low cost and simple structure.…”

Section: Introductionmentioning

confidence: 99%

Multi-Twin-SSB Modulation with Direct Detection Based on Kramers–Kronig Scheme for Long-Reach PON Downstream

Gao

Cai

et al. 2019

Applied Sciences

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As the demand for high data volumes keeps increasing in optical access networks, transmission capacities and distance are becoming bottlenecks for passive optical networks (PONs). To solve this problem, a novel scheme based on multi-twin single sideband (SSB) modulation with direct detection is proposed and investigated in this paper. At the central office, two SSB signals are generated simultaneously with the same digital-to-analog converters (DACs). The twin-SSB signal is not only robust against frequency selected power fading introduced by chromatic dispersion (CD), but also improves the spectral efficiency (SE). By combining a twin-SSB technique with multi-band carrier-less amplitude/phase modulation (multi-CAP), different optical network units (ONUs) can be supported by flexible multi-band allocation based on software-reconfigurable optical transceivers. The Kramers–Kronig (KK) scheme is adopted on the ONU side to effectively mitigate the signal–signal beat interference (SSBI) induced by the square-law detection. The proposed system is extensively studied and validated with four sub-bands using 50 Gbps 16 quadrature amplitude modulation (QAM) modulation for each sub-band using numerical simulations. Digital pre-equalization is introduced at the transmitter-side to balance the performance of different ONUs. After system optimization, a bit error rate (BER) threshold for hard decision forward error correction (HD-FEC) code with 7% redundancy ratio (BER = 3.8 × 10−3) can be reached for all ONUs over 50-km standard single-mode fiber.

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“…Example demonstrations include 25 Gb/s, 40 Gb/s, or 50 Gb/s electrical Duobinary [2][3][4][5][6], optical Duobinary [3,[5][6][7], and four-level pulse amplitude modulation (PAM-4) [2,[4][5][6]8]. More complex multi-band or multi-carrier modulation schemes [9,10] have also been demonstrated. These schemes have shown the feasibility of supporting 25 Gb/s or 40 Gb/s data rates using 10-G transmitters [2,3,7,8] and/or 10-G receivers [2,3], and thus they can offer low-cost solutions.…”

Section: Introductionmentioning

confidence: 99%

“…This includes different cases with different fiber distances, and whether advanced or low-complex DSPs should be considered. The more complex multi-band or multi-carrier schemes may find superior advantages in long-reach PONs [9]; however, here we focus on the maximum achievable performance for simple single carrier schemes. This work extends our previous work in [11,12] via contributing a fair performance comparison between all three schemes by considering symbol-spaced equalization, including both linear and nonlinear equalizers.…”

Section: Introductionmentioning

confidence: 99%

DSP-Based 40 GB/s Lane Rate Next-Generation Access Networks

et al. 2018

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To address the continuous growth in high-speed ubiquitous access required by residential users and enterprises, Telecommunication operators must upgrade their networks to higher data rates. For optical fiber access networks that directly connect end users to metro/regional network, capacity upgrade must be done in a cost-and energy-efficient manner. 40 Gb/s is the possible lane rate for the next generation passive optical networks (NG-PONs). Ideally, existing 10 G PON components could be reused to support 40 Gb/s lane-rate NG-PON transceiver, which requires efficient modulation format and digital signal processing (DSP) to alleviate the bandwidth limitation and fiber dispersion. The major contribution of this work is to offer insight performance comparisons of 40 Gb/s lane rate electrical three level Duobinary, optical Duobinary, and four-level pulse amplitude modulation (PAM-4) for incorporating low complex DSPs, including linear and nonlinear Volterra equalization, as well as maximum likelihood sequence estimation. Detailed analysis and comparison of the complexity of various DSP algorithms are performed. Transceiver bandwidth optimization is also undertaken. The results show that the choices of proper modulation format and DSP configuration depend on the transmission distances of interest.

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Multi-band CAP for Next-Generation Optical Access Networks Using 10-G Optics

Cited by 34 publications

References 31 publications

Analysis of Nyquist Pulse Shapes for Carrierless Amplitude and Phase Modulation in Visible Light Communications

Analysis of Nyquist Pulse Shapes for Carrierless Amplitude and Phase Modulation in Visible Light Communications

Multi-Twin-SSB Modulation with Direct Detection Based on Kramers–Kronig Scheme for Long-Reach PON Downstream

DSP-Based 40 GB/s Lane Rate Next-Generation Access Networks

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