Architectures and Key DSP Techniques of Next Generation Passive Optical Network (PON)

Li, Fan; Luo, Zhibin; Yin, Mingzhu; Wang, Xiaowu; Li, Zhaohui

doi:10.1364/ofc.2022.m3g.4

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…In the proposed scheme, THP has been used to compensate the dispersion damage of the signal. We apply up-sampling operation and noise shaping [12,13] to quantize the signal to 4 levels and greatly reduce the in-band quantization noise. Weighing performance and complexity, a conventional predesigned FIR filter is used for noise shaping in our scheme rather than a channel response-dependent FIR filter.…”

Section: Introduction He Growing Capacity Demand For Cloud-computing Andmentioning

confidence: 99%

Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC

Chen,

Liang,

et al. 2024

IEEE Photonics J.

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Data center interconnections are cost-sensitive. We propose and demonstrate a cost-effective C-band intensity modulation direct detection (IM/DD) transmitter for extended range (ER) inter-datacenter interconnects utilizing only a 2-bit digital-to-analog converter (DAC). Tomlinson-Harashima precoding (THP) is used in transmitter DSP to compensate for dispersion-induced impairments. Due to the uniform distribution of signal levels after THP encoding, a high-resolution DAC is required to generate electrical signals. The hardware cost of the transmitter can be significantly reduced by compressing the physical number of bits (PNOB) of the DAC to 2 bits. We quantize the signal to 4 levels and utilize up-sampling and noise shaping to greatly reduce the in-band quantization noise. The in-band signal to noise ratio (SNR) can be increased to 23 dB. We experimentally demonstrate a cost-effective 40-Gbaud probabilistic shaping PAM-4 C-band IM/DD transmission over 50-km utilizing only a 2bit DAC in the transmitter without any optical dispersion compensation. The performance of the proposed scheme is proximate to the common case of using an 8-bit DAC. It has a BER gap of about 2×10 -3 only when the received optical power (ROP) is higher than -6 dBm.

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Section: Introduction He Growing Capacity Demand For Cloud-computing Andmentioning

confidence: 99%

Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC

Chen,

Liang,

et al. 2024

IEEE Photonics J.

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“…In recent years, with the explosive growth of the emerging applications like the peer-to-peer (P2P) file sharing, video-on-demand (VoD), and three-dimensional (3D) interactive games, the number of important applications for the localized traffic demand in optical broadband access networks has been growing steadily. It also provides many main challenges in access network [1]. As an outcome, the network coding (NC) [2] scheme is a promising approach in which the OLT encodes the two traffic streams via predefined coding operation (e.g., XOR bits) and then broadcasts the encoded traffic stream to all ONUs as downstream.…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of joint hierarchical modulation and physical layer network coding for next passive optical networks

Feng¹,

Li²,

Luo³

2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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In order to fulfill the traffic localization, the network coding (NC) paradigm is a promising approach that can significantly improve the throughput, end-to-end (E2E) delay, and energy efficiency for passive optical network (PON).On the other hand, more recently, the hierarchical modulation (HM) incorporates with advanced digital signal processing (DSP) technology can optimize the total available capacity of PON. In this paper, in order to optimize the network performance, we propose a joint physical layer NC (PLNC) and HM in PON. Subsequently, we evaluate the bit error rate (BER) of M-QAM modulated PLNC that uses the proposed mapping scheme. Afterwards, as an application, a rate adaptation scheme for the method of PLNC is proposed. Simulation results show that combined HM and PLNC mechanism has better BER in OFDM-PON than the conventional NC. Meanwhile, the rate-adaptive PLNC is advantageous in various scenarios.

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An Improved OFDMA Design for Low-Cost Receivers

Yang

2022

2022 International Symposium on Wireless Communication Systems (ISWCS)

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Architectures and Key DSP Techniques of Next Generation Passive Optical Network (PON)

Abstract: Passive optical network (PON) is continuously explored for new architectures and effective DSP techniques to adapt to the next generation communication. In this paper, we summarize our work and discuss the challenges and potential solutions for the next-generation PON.

Cited by 5 publications

References 7 publications

Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC

Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC

Theoretical analysis of joint hierarchical modulation and physical layer network coding for next passive optical networks

An Improved OFDMA Design for Low-Cost Receivers

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