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Proceedings ArticleDOI

Digital coherent technology for long-reach optical access

TLDR
This semi-tutorial paper outlines the potential advantages afforded by digital coherent receivers in long-reach optical access networks and low complexity DSP algorithms are discussed which relax the optical complexity requirements of a coherent receiver.
Abstract
This semi-tutorial paper outlines the potential advantages afforded by digital coherent receivers in long-reach optical access networks. Low complexity DSP algorithms are discussed which relax the optical complexity requirements of a coherent receiver. © OSA 2014.

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Citations
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Proceedings ArticleDOI

Demonstration of bandwidth-efficient mobile fronthaul enabling seamless aggregation of 36 E-UTRA-like wireless signals in a single 1.1-GHz wavelength channel

TL;DR: A bandwidth-efficient mobile fronthaul system, where 36 E-UTRA-like wireless signals, six for each standardized bandwidth, are aggregated in a single wavelength channel, achieving >30 dB loss budget for a 20-km SSMF link.
Journal ArticleDOI

Reduced complexity equalization for coherent long-reach passive optical networks [invited]

TL;DR: It is found that a cascade of linear filters can be combined into a single, truncated, linear, adaptive filter with negligible impact on receiver sensitivity, and by utilizing a multiplier-free tap weight update algorithm, the overall complexity of a digital coherent receiver can be significantly reduced, making it attractive for use in an ONU.
Proceedings ArticleDOI

Polarization-insensitive single balanced photodiode coherent receiver for passive optical networks

TL;DR: Alamouti polarization-time block coding, combined with heterodyne detection, enables phase-diverse coherent detection using a single balanced photodiode without optical polarization tracking as discussed by the authors.
Journal ArticleDOI

Success Journey of Coherent PM-QPSK Technique with Its Variants: A Survey

TL;DR: A state of art over different strategies employing PM-QPSK techniques to achieve an enhancement in various optical performance parameters is presented.
Proceedings ArticleDOI

Identification of cost and energy efficient multiplexing techniques for LR-PON for different network scenario

TL;DR: This study analyzes and identifies the most appropriate remote node combination for different network scenarios for different fiber reach and subscribers and cascade the power splitter and arrayed waveguide grating at remote to give hybrid TDM-WDM PON.
References
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Journal ArticleDOI

A simple transmit diversity technique for wireless communications

TL;DR: This paper presents a simple two-branch transmit diversity scheme that provides the same diversity order as maximal-ratio receiver combining (MRRC) with one transmit antenna, and two receive antennas.
Journal ArticleDOI

Digital filters for coherent optical receivers.

TL;DR: Using the analytical solution an upper bound on the number of taps required to compensate chromatic dispersion is obtained, with simulation revealing an improved bound of 2.2 taps per 1000ps/nm for 10.7GBaud data.
Journal ArticleDOI

Coherent detection in optical fiber systems

TL;DR: This work reviews detection methods, including noncoherent, differentially coherent, and coherent detection, as well as a hybrid method, and compares modulation methods encoding information in various degrees of freedom (DOF).
Journal ArticleDOI

Compensation of Quadrature Imbalance in an Optical QPSK Coherent Receiver

TL;DR: This letter explores the Gram-Schmidt orthogonalization procedure (GSOP) for compensation of quadrature imbalance in an optical 90deg hybrid and demonstrates the improvement which can be achieved using the GSOP, including the impact of quantization in the digital coherent receiver.
Journal ArticleDOI

Architectural principles of optical regional and metropolitan access networks

TL;DR: This work qualitatively and quantitatively investigates many important principles, as well as challenges, in deploying optical regional and metropolitan access networks (ORMA-Nets), and presents architectures for achieving a high degree of functionality using relatively low-cost, passive optical components in the distribution network.
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