期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 34, 期 6, 页码 1453-1463出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2016.2519260
关键词
Carrier phase estimation; coherent detection; LDPC; superchannel
资金
- UK EPSRC Program [EP/J017582/1]
- Royal Academy of Engineering/the Leverhulme Trust Senior Research Fellowship
- Engineering and Physical Sciences Research Council [EP/J017582/1] Funding Source: researchfish
- EPSRC [EP/J017582/1] Funding Source: UKRI
We describe the design of a trained and pilot-aided digital coherent receiver, capable of detecting a 1Tb/s superchannel with a single optical front-end. Algorithms for receiver training are described, which calculate the equalizer coefficients, subchannel SNRs, and centroids of the transmitted constellations. Algorithms for pilot-aided operation are then described in detail, providing pilot-aided constant modulus equalization and joint carrier-phase estimation over several coherent subchannels. We demonstrate the detection of a superchannel with net bit rate in excess of 1 Tb/s with a single coherent receiver. An 11 x 10 GBd DP-64QAM Nyquist superchannel is used, with 1.32 Tb/s gross bit rate.
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