Abstract

Abstract: We experimentally demonstrate a novel digital signal processing (DSP) structure for reduced guard-interval (RGI) OFDM coherent optical systems. The proposed concept is based on digitally slicing optical channel bandwidth into multiple spectrally disjoint sub-bands which are then processed in parallel. Each low bandwidth sub-band has a smaller delay-spread compared to a full-band signal. This enables compensation of both chromatic dispersion (CD) and polarization mode dispersion using a simple timing and one-tap-per-symbol frequency domain equalizer with a small cyclic prefix overhead. In terms of the DSP architecture, this allows for a highly efficient parallelization of DSP tasks performed over the received signal samples by deploying multiple processors running at a lower clock rate. It should be noted that this parallelization is performed in the frequency domain and it allows for flexible optical transceiver schemes. In addition, the resulting optical receiver is simplified due to the removal of the CD compensation equalizer compared to conventional RGI-OFDM systems. In this paper we experimentally demonstrate digital sub-banding of optical bandwidth. We test the system performance for different modulation formats (QPSK, 16QAM and 32QAM) over various transmission distances and optical launch powers using a 1.5% CP overhead in all scenarios. We also compare the proposed RGI-OFDM architecture performance against common single carrier modulation formats. At the same total data rate and signal bandwidth both systems have similar performance and transmission reach whereas the proposed method allows for a significant reduction of computational complexity due to removal of CD pre/post compensation equalizer.

© 2015 Optical Society of America

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References

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    [Crossref]
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    [Crossref] [PubMed]
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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [PubMed]
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    [Crossref]
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    [Crossref] [PubMed]
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2015 (1)

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

2014 (4)

X. Liu, S. Chandrasekhar, and P. J. Winzer, “Digital signal processing techniques enabling multi-Tb/s superchannel transmission: an overview of recent advances in DSP-enabled superchannels,” IEEE Signal Process. Mag. 31(2), 16–24 (2014).
[Crossref]

M. Nazarathy and A. Tolmachev, “Subbanded DSP architectures based on underdecimated filter banks for coherent OFDM receivers: overview and recent advances,” IEEE Signal Process. Mag. 31(2), 70–81 (2014).
[Crossref]

Q. Zhuge, M. Morsy-Osman, M. Chagnon, X. Xu, M. Qiu, and D. V. Plant, “Terabit bandwidth-adaptive transmission using low-complexity format-transparent digital signal processing,” Opt. Express 22(3), 2278–2288 (2014).
[Crossref] [PubMed]

B. S. G. Pillai, B. Sedighi, K. Guan, N. P. Anthapadmanabhan, W. Shieh, K. J. Hinton, and R. S. Tucker, “End-to-end energy modeling and analysis of long-haul coherent transmission systems,” J. Lightwave Technol. 32(18), 3093–3111 (2014).
[Crossref]

2013 (1)

A. Bar, A. Tolmachev, and M. Nazarathy, “In-Service monitoring of chromatic dispersion with filter-bank digitally sub-banded OFDM,” IEEE Photonics Technol. Lett. 25(22), 2189–2192 (2013).
[Crossref]

2012 (2)

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Q. Yang, Z. He, Z. Yang, S. Yu, X. Yi, and W. Shieh, “Coherent optical DFT-Spread OFDM transmission using orthogonal band multiplexing,” Opt. Express 20(3), 2379–2385 (2012).
[PubMed]

2011 (1)

2010 (1)

2009 (1)

2008 (1)

Anthapadmanabhan, N. P.

Bao, H.

Bar, A.

A. Bar, A. Tolmachev, and M. Nazarathy, “In-Service monitoring of chromatic dispersion with filter-bank digitally sub-banded OFDM,” IEEE Photonics Technol. Lett. 25(22), 2189–2192 (2013).
[Crossref]

Ben-Ezra, S.

M. Nazarathy, A. Tolmachev, and S. Ben-Ezra, “Sub-banding DSP for flexible optical transceivers,” in 14th International Conference on Transparent Optical Networks (2012), paper 6253734.

Castoldi, P.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Chagnon, M.

Chandrasekhar, S.

X. Liu, S. Chandrasekhar, and P. J. Winzer, “Digital signal processing techniques enabling multi-Tb/s superchannel transmission: an overview of recent advances in DSP-enabled superchannels,” IEEE Signal Process. Mag. 31(2), 16–24 (2014).
[Crossref]

N. Kaneda, Q. Yang, X. Liu, S. Chandrasekhar, W. Shieh, and Y. K. Chen, “Real-time 2.5 GS/s coherent optical receiver for 53.3-Gb/s sub-banded OFDM,” J. Lightwave Technol. 28(4), 494–501 (2010).
[Crossref]

Chang, G. K.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Chen, Y. K.

D’Errico, A.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Detwiler, T.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Fabrega, J. M.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Fischer, J. K.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Frigerio, S.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Gimenez, J. P. F.-P.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Guan, K.

He, Z.

Hinton, K. J.

Hsueh, Y. T.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Ishihara, K.

Kaneda, N.

Kobayashi, T.

Kudo, R.

Liu, C.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Liu, X.

X. Liu, S. Chandrasekhar, and P. J. Winzer, “Digital signal processing techniques enabling multi-Tb/s superchannel transmission: an overview of recent advances in DSP-enabled superchannels,” IEEE Signal Process. Mag. 31(2), 16–24 (2014).
[Crossref]

N. Kaneda, Q. Yang, X. Liu, S. Chandrasekhar, W. Shieh, and Y. K. Chen, “Real-time 2.5 GS/s coherent optical receiver for 53.3-Gb/s sub-banded OFDM,” J. Lightwave Technol. 28(4), 494–501 (2010).
[Crossref]

Lord, A.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Miyamoto, Y.

Moreolo, M. S.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Morsy-Osman, M.

Napoli, A.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Nazarathy, M.

M. Nazarathy and A. Tolmachev, “Subbanded DSP architectures based on underdecimated filter banks for coherent OFDM receivers: overview and recent advances,” IEEE Signal Process. Mag. 31(2), 70–81 (2014).
[Crossref]

A. Bar, A. Tolmachev, and M. Nazarathy, “In-Service monitoring of chromatic dispersion with filter-bank digitally sub-banded OFDM,” IEEE Photonics Technol. Lett. 25(22), 2189–2192 (2013).
[Crossref]

A. Tolmachev and M. Nazarathy, “Filter-bank based efficient transmission of reduced-guard-interval OFDM,” Opt. Express 19(26), B370–B384 (2011).
[Crossref] [PubMed]

M. Nazarathy, A. Tolmachev, and S. Ben-Ezra, “Sub-banding DSP for flexible optical transceivers,” in 14th International Conference on Transparent Optical Networks (2012), paper 6253734.

Nolle, M.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Pagano, A.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Pan, J.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Pillai, B. S. G.

Plant, D. V.

Qiu, M.

Rafique, D.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Ralph, S. E.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Riccardi, E.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Salas, E. H.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Sambo, N.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Sano, A.

Sedighi, B.

Shieh, W.

Stark, A.

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Takatori, Y.

Tang, Y.

Tolmachev, A.

M. Nazarathy and A. Tolmachev, “Subbanded DSP architectures based on underdecimated filter banks for coherent OFDM receivers: overview and recent advances,” IEEE Signal Process. Mag. 31(2), 70–81 (2014).
[Crossref]

A. Bar, A. Tolmachev, and M. Nazarathy, “In-Service monitoring of chromatic dispersion with filter-bank digitally sub-banded OFDM,” IEEE Photonics Technol. Lett. 25(22), 2189–2192 (2013).
[Crossref]

A. Tolmachev and M. Nazarathy, “Filter-bank based efficient transmission of reduced-guard-interval OFDM,” Opt. Express 19(26), B370–B384 (2011).
[Crossref] [PubMed]

M. Nazarathy, A. Tolmachev, and S. Ben-Ezra, “Sub-banding DSP for flexible optical transceivers,” in 14th International Conference on Transparent Optical Networks (2012), paper 6253734.

Tucker, R. S.

Winzer, P. J.

X. Liu, S. Chandrasekhar, and P. J. Winzer, “Digital signal processing techniques enabling multi-Tb/s superchannel transmission: an overview of recent advances in DSP-enabled superchannels,” IEEE Signal Process. Mag. 31(2), 16–24 (2014).
[Crossref]

Xu, X.

Yang, Q.

Yang, Z.

Yi, X.

Yu, S.

Zervas, G.

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

Zhuge, Q.

IEEE Commun. Mag. (1)

N. Sambo, P. Castoldi, A. D’Errico, E. Riccardi, A. Pagano, M. S. Moreolo, J. M. Fabrega, D. Rafique, A. Napoli, S. Frigerio, E. H. Salas, G. Zervas, M. Nolle, J. K. Fischer, A. Lord, and J. P. F.-P. Gimenez, “Next generation sliceable bandwidth variable transponders,” IEEE Commun. Mag. 53(2), 163–171 (2015).
[Crossref]

IEEE Photonics Technol. Lett. (1)

A. Bar, A. Tolmachev, and M. Nazarathy, “In-Service monitoring of chromatic dispersion with filter-bank digitally sub-banded OFDM,” IEEE Photonics Technol. Lett. 25(22), 2189–2192 (2013).
[Crossref]

IEEE Signal Process. Mag. (2)

X. Liu, S. Chandrasekhar, and P. J. Winzer, “Digital signal processing techniques enabling multi-Tb/s superchannel transmission: an overview of recent advances in DSP-enabled superchannels,” IEEE Signal Process. Mag. 31(2), 16–24 (2014).
[Crossref]

M. Nazarathy and A. Tolmachev, “Subbanded DSP architectures based on underdecimated filter banks for coherent OFDM receivers: overview and recent advances,” IEEE Signal Process. Mag. 31(2), 70–81 (2014).
[Crossref]

J. Lightwave Technol. (3)

Opt. Express (4)

Proc. SPIE (1)

C. Liu, J. Pan, T. Detwiler, A. Stark, Y. T. Hsueh, G. K. Chang, and S. E. Ralph, “Super receiver design for superchannel coherent optical systems,” Proc. SPIE 8284, 828405 (2012).
[Crossref]

Other (7)

M. Nazarathy, A. Tolmachev, and S. Ben-Ezra, “Sub-banding DSP for flexible optical transceivers,” in 14th International Conference on Transparent Optical Networks (2012), paper 6253734.

M. Nazarathy and A. Tolmachev, “Digitally sub-banded coherent optical OFDM transmission,” in Optical Fiber Communications Conference and Exhibition (OSA 2014), paper Tu3G.1.

A. Tolmachev and M. Nazarathy, “Low-complexity multi-band polyphase filter bank for reduced-guard-interval coherent optical OFDM,” in Signal Processing in Photonic Communications (OSA, 2011), paper SPMB3.

Q. Yang, N. Kaneda, X. Liu, S. Chandrasekhar, W. Shieh, and Y. K. Chen, “Towards real-time implementation of optical OFDM transmission,” in Optical Fiber Communications Conference (OSA, 2010), paper OMS6.
[Crossref]

M. Kuschnerov, T. Bex, and P. Kainzmaier, “Energy efficient digital signal processing,” in Optical Fiber Communications Conference and Exhibition (OSA, 2014), paper Th3E.7.

J. G. Proakis, Digital Communications, 5th ed. (McGraw Hill 2001).

Q. Yang, “Digital signal processing for multi-gigabit real-time OFDM,” in Signal Processing in Photonic Communications (OSA, 2011), paper SPMB2.

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Figures (11)

Fig. 1
Fig. 1 Proposed digital multi-band data structure with DC pilot tone for carrier recovery: Each channel (assumed here 35.2 GHz) is digitally frequency division de-multiplexed into M active sub-bands (here M = 14). The extreme sub-band (partitioned into two wrapped-around halves) is dedicated for filtering the transition roll-off of DAC image-rejection filter, and the center sub-band is dedicated to the guard band for inserting a pilot tone
Fig. 2
Fig. 2 Comparison of required CP length for (a) conventional OFDM and (b) MSB-RGI-OFDM
Fig. 3
Fig. 3 Conventional DFTS-OFDM
Fig. 4
Fig. 4 MSB-RGI-OFDM Transmitter
Fig. 5
Fig. 5 Filter Bank based MSB-RGI-OFDM Receiver
Fig. 6
Fig. 6 Sub-band receiver processor for MSB-RGI-OFDM.
Fig. 7
Fig. 7 Experimental setup. EDFA: Erbium-doped fiber amplifiers, BPF: band-pass filter, T-T BPF: Tunable bandwidth and tunable center frequency band-pass filter, LO: local oscillator, PC: polarization controller, SW: switch.
Fig. 8
Fig. 8 Back-to-back performance of different modulation formats under different PSR.
Fig. 9
Fig. 9 Performance of each subcarrier in back-to-back and after transmission for different modulation formats at optimum launch power and PSR
Fig. 10
Fig. 10 Average Q2-factor after transmission for different launch power. Solid line and dashed line corresponds to MSB-DFTS-OFDM and SC, respectively.
Fig. 11
Fig. 11 Maximum transmission distance for different modulation formats. Solid line and dashed line corresponds to MSB-DFTS-OFDM and SC, respectively (a) QPSK transmission with a BER threshold of 3.8 × 10−3 and (b-c) 16QAM and 32QAM transmission with a BER threshold of 2 × 10−2.

Equations (2)

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Δ τ i =2π| β 2 |L ν i
PSR( dB ) = 10log10( P pilot P signal )

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