Next Article in Journal
Intelligent Monitoring of Data Center Physical Infrastructure
Next Article in Special Issue
Special Issue on Optical Communications and Networking: Prospects in Industrial Applications
Previous Article in Journal
Evaluation of Whole-Body Vibration Exercise on Neuromuscular Activation Through Electromyographic Pattern of Vastus Lateralis Muscle and on Range of Motion of Knees in Metabolic Syndrome: A Quasi-Randomized Cross-Over Controlled Trial
Previous Article in Special Issue
Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone
Open AccessArticle

Joint Probabilistic-Nyquist Pulse Shaping for an LDPC-Coded 8-PAM Signal in DWDM Data Center Communications

1
ECE Department, University of Arizona, Tucson, AZ 85721, USA
2
Juniper Networks, 1133 Innovation Way, Sunnyvale, CA 94089, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(23), 4996; https://doi.org/10.3390/app9234996
Received: 1 November 2019 / Revised: 17 November 2019 / Accepted: 18 November 2019 / Published: 20 November 2019
M-ary pulse-amplitude modulation (PAM) meets the requirements of data center communication because of its simplicity, but coarse entropy granularity cannot meet the dynamic bandwidth demands, and there is a large capacity gap between uniform formats and the Shannon limit. The dense wavelength division multiplexing (DWDM) system is widely used to increase the channel capacity, but low spectral efficiency of the intensity modulation/direct detection (IM/DD) solution restricts the throughput of the modern DWDM data center networks. Probabilistic shaping distribution is a good candidate to offer us a fine entropy granularity and efficiently reduce the gap to the Shannon limit, and Nyquist pulse shaping is widely used to increase the spectral efficiency. We aim toward the joint usage of probabilistic shaping and Nyquist pulse shaping with low-density parity-check (LDPC) coding to improve the bit error rate (BER) performance of 8-PAM signal transmission. We optimized the code rate of the LDPC code and compared different Nyquist pulse shaping parameters using simulations and experiments. We achieved a 0.43 dB gain using Nyquist pulse shaping, and a 1.1 dB gain using probabilistic shaping, while the joint use of probabilistic shaping and Nyquist pulse shaping achieved a 1.27 dB gain, which offers an excellent improvement without upgrading the transceivers. View Full-Text
Keywords: pulse amplitude modulation; nyquist pulse shaping; DWDM system; LDPC coding pulse amplitude modulation; nyquist pulse shaping; DWDM system; LDPC coding
Show Figures

Figure 1

MDPI and ACS Style

Han, X.; Yang, M.; Djordjevic, I.B.; Yue, Y.; Wang, Q.; Qu, Z.; Anderson, J. Joint Probabilistic-Nyquist Pulse Shaping for an LDPC-Coded 8-PAM Signal in DWDM Data Center Communications. Appl. Sci. 2019, 9, 4996.

AMA Style

Han X, Yang M, Djordjevic IB, Yue Y, Wang Q, Qu Z, Anderson J. Joint Probabilistic-Nyquist Pulse Shaping for an LDPC-Coded 8-PAM Signal in DWDM Data Center Communications. Applied Sciences. 2019; 9(23):4996.

Chicago/Turabian Style

Han, Xiao; Yang, Mingwei; Djordjevic, Ivan B.; Yue, Yang; Wang, Qiang; Qu, Zhen; Anderson, Jon. 2019. "Joint Probabilistic-Nyquist Pulse Shaping for an LDPC-Coded 8-PAM Signal in DWDM Data Center Communications" Appl. Sci. 9, no. 23: 4996.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop