Title :
Iterative Polar Quantization-Based Modulation to Achieve Channel Capacity in Ultrahigh-Speed Optical Communication Systems
Author :
Batshon, Hussam G. ; Djordjevic, Ivan B. ; Xu, Lei ; Wang, Ting
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA
Abstract :
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).
Keywords :
Gaussian channels; channel capacity; high-speed optical techniques; multiplexing; optical communication; parity check codes; quadrature amplitude modulation; Gaussian channels; channel capacity; iterative polar quantization-based modulation; low-density parity-check codes; nonuniform coded-modulation format; polarization-multiplexing; quadrature amplitude modulation; ultrahigh-speed optical communication systems; Aggregates; Channel capacity; Gaussian channels; Modulation; Optical fiber communication; Optical polarization; Optical propagation; Parity check codes; Quantization; Signal to noise ratio; Coded modulation; coherent communications; fiber optics and optical communications; forward error correction; iterative polar quantization (IPQ); low-density parity-check (LDPC) codes; modulation;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2010.2051219
