Title:
PROBABILISTICALLY SHAPED MULTI-LEVEL PULSE MODULATION WITH GRAY CODE MAPPING
Document Type and Number:
WIPO Patent Application WO/2019/134681
Kind Code:
A1
Abstract:
A method of generating a probabilistically shaped (PS), multi-level modulation signals includes encoding information bits into coded bits to which probability values are assigned according to a probability mass function, and mapping, based on a Gray coding scheme, the coded bits into symbols to which the probability values are assigned. The probability mass function is implemented by determining probabilities of the coded bits so that the probabilities of the coded bits in ascending or descending order have a Gaussian distribution, and performing a probability distribution pre-adjustment by redistributing probabilities of the coded bits corresponding to symbols probabilities of which are outside Gaussian distribution so that the symbols mapped based on the Gray coding scheme have the Gaussian distribution.
Inventors:
CHIEN HUNG-CHANG (US)
YU JIANJUN (US)
YU JIANJUN (US)
Application Number:
PCT/CN2019/070469
Publication Date:
July 11, 2019
Filing Date:
January 04, 2019
Export Citation:
Assignee:
ZTE CORP (CN)
International Classes:
H04L1/00; H04B10/50
Foreign References:
| EP1324558A1 | 2003-07-02 |
Other References:
METODI P. YANKOV ET AL.: "Constellation Shaping for Fiber-Optic Channels With QAM and High Spectral Efficiency", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 26, no. 23, 1 December 2014 (2014-12-01), XP011563532
METODI P. YANKOVN ET AL.: "Constellation Shaping for WDM Systems Using 256QAM/1024QAM With Probabilistic Optimization", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 34, no. 22, 15 November 2016 (2016-11-15), XP080691619
LI QI ET AL.: "Simple constellation shaping for BICM-ID", JOURNAL ON COMMUNICATIONS, vol. 36, no. 6, 30 June 2015 (2015-06-30)
METODI P. YANKOVN ET AL.: "Constellation Shaping for WDM Systems Using 256QAM/1024QAM With Probabilistic Optimization", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 34, no. 22, 15 November 2016 (2016-11-15), XP080691619
LI QI ET AL.: "Simple constellation shaping for BICM-ID", JOURNAL ON COMMUNICATIONS, vol. 36, no. 6, 30 June 2015 (2015-06-30)
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
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