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Instantaneous Frequency Measurement with Digital Outputs Based on An Optical Filter Array
Optical Filter Digital Output Instantaneous Frequency Measurement
2015/5/15
A photonic approach using an optical filter array is proposed to perform instantaneous frequency measurement with digital outputs. 4-bit digital outputs are then experimentally demonstrated within the...
Digital Lightpath Label Transcoding for Dual-Polarization QPSK Systems
Digital Lightpath Label Transcoding QPSK System
2015/5/15
We introduce digital lightpath labeling for DP-QPSK transmission, using novel binary encoding to embed a polarization-shift-keyed subchannel. An integrated inline polarimeter powers a compact label re...
Optical Phase-Modulated Radio-over-Fiber Links with K-means Algorithm for Digital Demodulation of 8PSK Subcarrier Multiplexed Signals
Coherent communications Phase modulation
2015/6/5
A k-means algorithm for phase recovery of three, 50 Mbaud, 8PSK subcarrier multiplexed signals at 5 GHz for optical phase-modulated radio-over-fiber is proposed and experimentally demonstrated after 4...
Network Innovations Brought by Digital Coherent Receivers
Fiber optics communications Coherent communications
2015/6/4
Operational efficiency improvements of optical networks enabled by digital coherent receivers are discussed in view of reliability, agility, performance and reduced operational complexity. Several spe...
Experimental 2.5 Gbit/s QPSK WDM Coherent Phase Modulated Radio- over-Fibre Link with Digital Demodulation by a K-means Algorithm
QPSK WDM Coherent Phase Modulated Radio- over-Fibre Link Digital Demodulation K-means Algorithm
2015/7/17
Highest reported bit rate of 2.5 Gbit/s for optically phase modulated radio-over-fibre link employing coherent detection is demonstrated. Demodulation of 3x2.5 Gbit/s QPSK modulated WDM channels, is a...
Complexity of Algorithms for Digital Coherent Receivers
Complexity Algorithms Digital Coherent Receivers
2015/7/16
We give an overview of digital signal processing algorithms for coherent receivers. We explore single carrier and multi carrier approaches and compare the complexity of blind equalizer adaptation as w...
Real-time Implementation of Digital Coherent Detection
Real-time Implementation Digital Coherent Detection
2015/7/15
The implementation of algorithms for coherent detection of advanced modulation formats imposes constraints. A hardware-efficient phase estimator is presented, and measurement results with a CMOS recei...