Title:
WAVEFORM EQUALIZATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/105430
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain an output signal y by performing waveform equalization in which an input signal x having non-linearity is expanded in a second-order Volterra series. The m-th output signal y(m) is determined using the following equation. In the following equation: h is the total number of kernels to be considered, where 1≦h≦L2, L2 being the second-order memory length; x2,m is the vector notation of a k-th order input signal x(m) with respect to an m-th equalized output signal y(m); w1 is the vector notation of the weighting of a tap of a linear term of the equation; and w2,n is the vector notation of the weighting of a tap of a non-linear term of the equation with respect to the n-th kernel.
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Inventors:
DIAMANTOPOULOS NIKOLAOS-PANTELEIMON (JP)
KAKITSUKA TAKAAKI (JP)
MATSUO SHINJI (JP)
KAKITSUKA TAKAAKI (JP)
MATSUO SHINJI (JP)
Application Number:
PCT/JP2019/043405
Publication Date:
May 28, 2020
Filing Date:
November 06, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B3/04; H03H21/00; H04B10/2507
Foreign References:
| JP2005303361A | 2005-10-27 | |||
| JP2016127599A | 2016-07-11 | |||
| JP2017059962A | 2017-03-23 |
Other References:
DIAMANTOPOULOS, NIKOLAOS-PANTELEIMON ET AL.: "On the Complexity Reduction of the Second-Order Volterra Nonlinear Equalizer for IM/ DD Systems", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 37, no. 4, February 2019 (2019-02-01), pages 1214 - 1224, XP011711953, DOI: 10.1109/JLT.2018.2890118
UEHASHI, SHUNSUKE ET AL.: "Computational complexity reduction for an adaptive equalization scheme based on memory polynomial for compensating both linear and nonlinear distortion", IEICE TECHNICAL REPORT, vol. 118, no. 442, February 2019 (2019-02-01), pages 63 - 68
UEHASHI, SHUNSUKE ET AL.: "Computational complexity reduction for an adaptive equalization scheme based on memory polynomial for compensating both linear and nonlinear distortion", IEICE TECHNICAL REPORT, vol. 118, no. 442, February 2019 (2019-02-01), pages 63 - 68
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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