Iterative Polar Quantization-Based Modulation to Achieve Channel Capacity in Ultrahigh-Speed Optical Communication Systems

In this paper, we propose a nonuniform coded-modulation format based on iterative polar quantization (IPQ) as a scheme to enable achieving channel capacity in ultrahigh-speed optical communication systems. The proposed modulation format is coded with structured low-density parity-check (LDPC) codes optimized for Gaussian channels and, in combination with polarization-multiplexing, can achieve 800 Gb/s per wavelength aggregate rate and beyond utilizing the currently available components operating at 50 GS/s. Using coded IPQ, we show that we can achieve capacity for signal-to-noise ratios (SNRs) of up to 25 dB and increase the total propagation distance over optical transmission systems by 275 km over coded star-quadrature amplitude modulation (QAM).

[1]  Charles F. Hockett,et al.  A mathematical theory of communication , 1948, MOCO.

[2]  Joseph M. Kahn,et al.  Nonlinear Impairment Compensation Using Backpropagation , 2009 .

[3]  W. T. Webb,et al.  Variable rate QAM for mobile radio , 1995, IEEE Trans. Commun..

[4]  John McDonough.  Moving standards to 100 Gbe and beyond , 2007, IEEE Communications Magazine.

[5]  I.B. Djordjevic,et al.  Next Generation FEC for High-Capacity Communication in Optical Transport Networks , 2009, Journal of Lightwave Technology.

[6]  Raymond K. Kostuk,et al.  Low-density parity check codes and iterative decoding for long-haul optical communication systems , 2003 .

[7]  Ajay Dholakia,et al.  Efficient implementations of the sum-product algorithm for decoding LDPC codes , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[8]  Sean P. Meyn,et al.  Characterization and computation of optimal distributions for channel coding , 2005, IEEE Transactions on Information Theory.

[9]  M. Stefanovic,et al.  Design of signal constellations for Gaussian channel by using iterative polar quantization , 1998, MELECON '98. 9th Mediterranean Electrotechnical Conference. Proceedings (Cat. No.98CH36056).

[10]  Gerhard Kramer,et al.  Capacity limits of information transport in fiber-optic networks. , 2008, Physical review letters.

[11]  Rüdiger L. Urbanke,et al.  Design of capacity-approaching irregular low-density parity-check codes , 2001, IEEE Trans. Inf. Theory.

[12]  C. E. SHANNON,et al.  A mathematical theory of communication , 1948, MOCO.