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

作者：Batshon Hussam G^*; Djordjevic Ivan B; Xu Lei; Wang Ting

来源：IEEE Photonics Journal, 2010, 2(4): 593-599.

DOI：10.1109/JPHOT.2010.2051219

• Coded modulation
• coherent communications
• fiber optics and optical communications
• forward error correction
• iterative polar quantization (IPQ)
• low-density parity-check (LDPC) codes
• modulation

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).

• 出版日期2010-8