Robust 9-QAM digital recovery for spectrum shaped coherent QPSK signal

Bo Huang; Junwen Zhang; Jianjun Yu; Ze Dong; Xinying Li; Haiyan Ou; Nan Chi; Wen Liu

doi:10.1364/OE.21.007216

Robust 9-QAM digital recovery for spectrum shaped coherent QPSK signal

Bo Huang^*
, Junwen Zhang
, Jianjun Yu
, Ze Dong
, Xinying Li
, Haiyan Ou
, Nan Chi
, Wen Liu

^*此作品的通讯作者

Huazhong University of Science and Technology
Technical University of Denmark
ZTE Corporation
Fudan University

科研成果: 期刊稿件 › 文章 › 同行评审

20 引用（Scopus）

摘要

We propose 9-ary quadrature amplitude modulation (9-QAM) data recovery for polarization multiplexing-quadrature phase shift keying (PM-QPSK) signal in presence of strong filtering to approach Nyquist bandwidth. The decision-directed least radius distance (DD-LRD) algorithm for blind equalization is used for 9-QAM recovery and intersymbol interference (ISI) compression. It shows the robustness under strong filtering to recover 9-QAM signal rather than QPSK. We demonstrate 112 Gb/s spectrum shaped PM-QPSK signal by wavelength selective switch (WSS) in a 25-GHz channel spacing Nyquist wavelength division multiplexing (NWDM). The final equalized signal is detected by maximum likelihood sequence decision (MLSD) for data bit-error-ratio (BER) measurement. Optical signal-to-noise ratio (OSNR) tolerance is improved by 0.5 dB at a BER of 1x10^-3 compared to constant modulus algorithm (CMA) plus post-filter algorithm.

源语言	英语
页（从-至）	7216-7221
页数	6
期刊	Optics Express
卷	21
期	6
DOI	https://doi.org/10.1364/OE.21.007216
出版状态	已出版 - 25 3月 2013
已对外发布	是

访问文件

10.1364/OE.21.007216

其它文件与链接

链接到 Scopus 的出版物

引用此

@article{c0da424b8bf449a29d24a758326d0765,

title = "Robust 9-QAM digital recovery for spectrum shaped coherent QPSK signal",

abstract = "We propose 9-ary quadrature amplitude modulation (9-QAM) data recovery for polarization multiplexing-quadrature phase shift keying (PM-QPSK) signal in presence of strong filtering to approach Nyquist bandwidth. The decision-directed least radius distance (DD-LRD) algorithm for blind equalization is used for 9-QAM recovery and intersymbol interference (ISI) compression. It shows the robustness under strong filtering to recover 9-QAM signal rather than QPSK. We demonstrate 112 Gb/s spectrum shaped PM-QPSK signal by wavelength selective switch (WSS) in a 25-GHz channel spacing Nyquist wavelength division multiplexing (NWDM). The final equalized signal is detected by maximum likelihood sequence decision (MLSD) for data bit-error-ratio (BER) measurement. Optical signal-to-noise ratio (OSNR) tolerance is improved by 0.5 dB at a BER of 1x10-3 compared to constant modulus algorithm (CMA) plus post-filter algorithm.",

author = "Bo Huang and Junwen Zhang and Jianjun Yu and Ze Dong and Xinying Li and Haiyan Ou and Nan Chi and Wen Liu",

year = "2013",

month = mar,

day = "25",

doi = "10.1364/OE.21.007216",

language = "English",

volume = "21",

pages = "7216--7221",

journal = "Optics Express",

issn = "1094-4087",

publisher = "Optica Publishing Group (formerly OSA)",

number = "6",

}

TY - JOUR

T1 - Robust 9-QAM digital recovery for spectrum shaped coherent QPSK signal

AU - Huang, Bo

AU - Zhang, Junwen

AU - Yu, Jianjun

AU - Dong, Ze

AU - Li, Xinying

AU - Ou, Haiyan

AU - Chi, Nan

AU - Liu, Wen

PY - 2013/3/25

Y1 - 2013/3/25

N2 - We propose 9-ary quadrature amplitude modulation (9-QAM) data recovery for polarization multiplexing-quadrature phase shift keying (PM-QPSK) signal in presence of strong filtering to approach Nyquist bandwidth. The decision-directed least radius distance (DD-LRD) algorithm for blind equalization is used for 9-QAM recovery and intersymbol interference (ISI) compression. It shows the robustness under strong filtering to recover 9-QAM signal rather than QPSK. We demonstrate 112 Gb/s spectrum shaped PM-QPSK signal by wavelength selective switch (WSS) in a 25-GHz channel spacing Nyquist wavelength division multiplexing (NWDM). The final equalized signal is detected by maximum likelihood sequence decision (MLSD) for data bit-error-ratio (BER) measurement. Optical signal-to-noise ratio (OSNR) tolerance is improved by 0.5 dB at a BER of 1x10-3 compared to constant modulus algorithm (CMA) plus post-filter algorithm.

AB - We propose 9-ary quadrature amplitude modulation (9-QAM) data recovery for polarization multiplexing-quadrature phase shift keying (PM-QPSK) signal in presence of strong filtering to approach Nyquist bandwidth. The decision-directed least radius distance (DD-LRD) algorithm for blind equalization is used for 9-QAM recovery and intersymbol interference (ISI) compression. It shows the robustness under strong filtering to recover 9-QAM signal rather than QPSK. We demonstrate 112 Gb/s spectrum shaped PM-QPSK signal by wavelength selective switch (WSS) in a 25-GHz channel spacing Nyquist wavelength division multiplexing (NWDM). The final equalized signal is detected by maximum likelihood sequence decision (MLSD) for data bit-error-ratio (BER) measurement. Optical signal-to-noise ratio (OSNR) tolerance is improved by 0.5 dB at a BER of 1x10-3 compared to constant modulus algorithm (CMA) plus post-filter algorithm.

UR - https://www.scopus.com/pages/publications/84875721586

U2 - 10.1364/OE.21.007216

DO - 10.1364/OE.21.007216

M3 - Article

C2 - 23546106

AN - SCOPUS:84875721586

SN - 1094-4087

VL - 21

SP - 7216

EP - 7221

JO - Optics Express

JF - Optics Express

IS - 6

ER -

Robust 9-QAM digital recovery for spectrum shaped coherent QPSK signal

摘要

访问文件

其它文件与链接

学术指纹

引用此