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Multi-dimensional permutation-modulation format for coherent optical communications
- Source :
- Optics Express. 23:15587
- Publication Year :
- 2015
- Publisher :
- The Optical Society, 2015.
-
Abstract
- We introduce the multi-dimensional permutation-modulation format in coherent optical communication systems and analyze its performance, focusing on the power efficiency and the spectral efficiency. In the case of four-dimensional (4D) modulation, the polarization-switched quadrature phase-shift keying (PS-QPSK) modulation format and the polarization quadrature-amplitude modulation (POL-QAM) format can be classified into the permutation modulation format. Other than these well-known modulation formats, we find novel modulation formats trading-off between the power efficiency and the spectral efficiency. With the increase in the dimension, the spectral efficiency can more closely approach the channel capacity predicted from the Shannon's theory. We verify these theoretical characteristics through computer simulations of the symbol-error rate (SER) and bit-error rate (BER) performances. For example, the newly-found eight-dimensional (8D) permutation-modulation format can improve the spectral efficiency up to 2.75 bit/s/Hz/pol/channel, while the power penalty against QPSK is about 1 dB at BER=10(-3).
- Subjects :
- Quadrature modulation
Signal processing
Continuous phase modulation
business.industry
Computer science
Orthogonal frequency-division multiplexing
Optical communication
Keying
Spectral efficiency
Polarization (waves)
Atomic and Molecular Physics, and Optics
Quadrature (mathematics)
Channel capacity
Optics
Delta modulation
Pulse-amplitude modulation
Modulation
Pulse-position modulation
Electronic engineering
business
Quadrature amplitude modulation
Computer Science::Information Theory
Communication channel
Phase-shift keying
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....fd4be35df82960a4a2c22787f4830728
- Full Text :
- https://doi.org/10.1364/oe.23.015587