用于相干光通信系统的高维调制

High-dimensional modulation for coherent optical communications systems.

作者信息

Millar David S, Koike-Akino Toshiaki, Arık Sercan Ö, Kojima Keisuke, Parsons Kieran, Yoshida Tsuyoshi, Sugihara Takashi

出版信息

Opt Express. 2014 Apr 7;22(7):8798-812. doi: 10.1364/OE.22.008798.

DOI:10.1364/OE.22.008798

Abstract

In this paper, we examine the performance of several modulation formats in more than four dimensions for coherent optical communications systems. We compare two high-dimensional modulation design methodologies based on spherical cutting of lattices and block coding of a 'base constellation' of binary phase shift keying (BPSK) on each dimension. The performances of modulation formats generated with these methodologies is analyzed in the asymptotic signal-to-noise ratio regime and for an additive white Gaussian noise (AWGN) channel. We then study the application of both types of high-dimensional modulation formats to standard single-mode fiber (SSMF) transmission systems. For modulation with spectral efficiencies comparable to dual-polarization (DP-) BPSK, polarization-switched quaternary phase shift keying (PS-QPSK) and DP-QPSK, we demonstrate SNR gains of up to 3 dB, 0.9 dB and 1 dB respectively, at a BER of 10(-3).

摘要

在本文中，我们研究了用于相干光通信系统的几种四维以上调制格式的性能。我们比较了两种基于格点球面切割和在每个维度上对二进制相移键控（BPSK）的“基本星座图”进行分组编码的高维调制设计方法。在渐近信噪比条件下以及加性高斯白噪声（AWGN）信道中，分析了用这些方法生成的调制格式的性能。然后，我们研究了这两种高维调制格式在标准单模光纤（SSMF）传输系统中的应用。对于频谱效率与双偏振（DP-）BPSK、偏振切换四相相移键控（PS-QPSK）和DP-QPSK相当的调制，我们证明在误码率为10^(-3)时，信噪比分别可提高高达3 dB、0.9 dB和1 dB。