NDLI: Delta-Sigma Digitization and Optical Coherent Transmission of DOCSIS 3.1 Signals in Hybrid Fiber Coax Networks

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Delta-Sigma Digitization and Optical Coherent Transmission of DOCSIS 3.1 Signals in Hybrid Fiber Coax Networks

Content Provider	Semantic Scholar
Author	Wang, Jing Jia, Zhensheng Campos, Luis Alberto Cheng, Lin Knittle, Curtis Chang, Gee-Kung
Copyright Year	2018
Abstract	We first demonstrate delta-sigma digitization and coherent transmission of data over cable system interface specification (DOCSIS) 3.1 signals in a hybrid fiber coax (HFC) network. Twenty 192-MHz DOCSIS 3.1 channels with modulation up to 16384QAM are digitized by a low-pass cascade resonator feedback (CRFB) delta-sigma analog-to-digital converter (ADC) and transmitted over 80-km fiber using coherent single-λ 128-Gb/s dual-polarization (DP) quadrature phase-shift keying (QPSK) and 256-Gb/s DP-16QAM optical links. Both one-bit and two-bit delta-sigma digitization are implemented and supported by the QPSK and 16QAM coherent transmission systems, respectively. To facilitate its practical application in access networks, the coherent system is built using a low-cost narrow-band optical modulator and RF amplifiers. Modulation error ratio (MER) larger than 50 dB is successfully demonstrated for all 20 DOCSIS 3.1 channels, and high-order modulation up to 16384QAM is delivered over fiber for the first time in HFC networks. The raw DOCSIS data capacity is 54 Gb/s with net user information ∼45 Gb/s. Moreover, the bit error ratio (BER) tolerance is evaluated by measuring the MER performance as BER increases. Negligible MER degradation is observed for BER up to 1.5 × 10−6 and 1.7 × 10−4 for one-bit and two-bit digitization, respectively.
Starting Page	568
Ending Page	579
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1109/JLT.2017.2775858
Volume Number	36
Alternate Webpage(s)	https://api.intechopen.com/chapter/pdf-preview/65102
Alternate Webpage(s)	https://api.intechopen.com/chapter/pdf-download/65102
Alternate Webpage(s)	https://doi.org/10.1109/JLT.2017.2775858
Journal	Journal of Lightwave Technology
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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