Training-Aided Coherent Optical Single-Carrier System With Improved Nonlinearity Tolerance

被引：5

作者：

Zhu, Chen ^{[1
]}

Tran, An V. ^{[2
]}

Du, Liang B. ^{[3
]}

Lowery, Arthur J. ^{[4
]}

机构：

[1] Univ Melbourne, Dept Elect & Elect Engn, Victoria Res Lab, Natl ICT Australia, Parkville, Vic 3000, Australia

[2] La Trobe Univ, Ctr Technol Infus, Bundoora, Vic 3010, Australia

[3] Google, Mountain View, CA 94043 USA

[4] Monash Univ, Ctr Ultrahigh Bandwidth Devices Opt Syst, Dept Elect & Comp Syst Engn, Clayton, Vic 3800, Australia

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 12期

关键词：

Coherent optical system; 64-QAM; MIMO equalization; training sequence; nonlinearity compensation; TRANSMISSION;

D O I：

10.1109/LPT.2014.2319235

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this letter, we propose a nonlinearity-tolerant channel estimation technique for training-aided single-carrier polarization-division-multiplexed (PDM) coherent optical systems. Simply by compensating the effects of fiber nonlinearity on the received training sequence, linear channel estimation and equalization can be improved; this approach is very efficient, which requires a negligible computational effort since training only occupies a very small portion of the total data. The concept is verified using simulations for both QPSK and 64-quadrature amplitude modulation (QAM) systems and experimental measurements for a 120-Gb/s PDM 64-QAM system with 800-km erbium-doped fiber amplifier (EDFA)-only transmission. The experimental results show that the system performance is improved by 0.4 dB at the optimal launched power and 1.6 dB in the highly nonlinear region, compared with conventional training-aided channel estimation approaches.

引用

页码：1211 / 1214

页数：4

共 16 条

[1] 8x40-Gb/s Optical Coherent Pol-Mux Single Carrier System With Frequency Domain Equalization and Training Sequences [J].

An Vu Tran ;

Zhu, Chen ;

Do, Cuong Cao ;

Chen, Simin ;

Anderson, Trevor ;

Hewitt, Don ;

Skafidas, Efstratios .

IEEE PHOTONICS TECHNOLOGY LETTERS, 2012, 24 (11) :885-887

[2]

Chang D., 2012, PROC IEEEOSA OPTICAL, P1

[3] Data-Aided Chromatic Dispersion Estimation for Polarization Multiplexed Optical Systems [J].

Do, Cuong C. ;

Tran, An V. ;

Zhu, Chen ;

Chen, Simin ;

Anderson, Trevor ;

Hewitt, Don ;

Skafidas, Efstratios .

IEEE PHOTONICS JOURNAL, 2012, 4 (05) :2037-2049

[4] Improved single channel backpropagation for intra-channel fiber nonlinearity compensation in long-haul optical communication systems [J].

Du, Liang B. ;

Lowery, Arthur J. .

OPTICS EXPRESS, 2010, 18 (16) :17075-17088

[5] Experimental demonstration of a format-flexible single-carrier coherent receiver using data-aided digital signal processing [J].

Elschner, Robert ;

Frey, Felix ;

Meuer, Christian ;

Fischer, Johannes Karl ;

Alreesh, Saleem ;

Schmidt-Langhorst, Carsten ;

Molle, Lutz ;

Tanimura, Takahito ;

Schubert, Colja .

OPTICS EXPRESS, 2012, 20 (27) :28786-28791

[6] Nonlinear Compensation Using Backpropagation for Polarization-Multiplexed Transmission [J].

Ip, Ezra .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2010, 28 (06) :939-951

[7] Nonlinear Tolerant Spectrally-Efficient Transmission Using PDM 64-QAM Single Carrier FDM With Digital Pilot-Tone [J].

Kobayashi, Takayuki ;

Sano, Akihide ;

Matsuura, Akihiko ;

Miyamoto, Yutaka ;

Ishihara, Koichi .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2012, 30 (24) :3805-3815

[8] Transmission of High-Baud PDM-64QAM Signals [J].

Peng, Wei-Ren ;

Tsuritani, Takehiro ;

Morita, Itsuro .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2013, 31 (13) :2146-2162

[9] The GN Model of Non-Linear Propagation in Uncompensated Coherent Optical Systems [J].

Poggiolini, Pierluigi .

JOURNAL OF LIGHTWAVE TECHNOLOGY, 2012, 30 (24) :3857-3879

[10] Digital filters for coherent optical receivers [J].

Savory, Seb J. .

OPTICS EXPRESS, 2008, 16 (02) :804-817

← 1 2 →