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Improved Wiener filtering method and system for high-speed optical pulse amplitude modulation

A technology of Wiener filtering and amplitude modulation, which is applied in the field of optical communication, can solve the problems of unstable filtering effect and complicated optimization process, and achieve fast processing speed and simple realization

Active Publication Date: 2018-08-07
太比康通讯科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the LMS-DD algorithm has some defects, including complex optimization process, unstable filtering effect, etc.

Method used

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  • Improved Wiener filtering method and system for high-speed optical pulse amplitude modulation
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  • Improved Wiener filtering method and system for high-speed optical pulse amplitude modulation

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Embodiment Construction

[0026] Such as figure 1 As shown, this embodiment includes: a sampling process, an autocorrelation matrix solution process, a cross-correlation matrix solution process, and a filter tap coefficient solution process.

[0027] The sampling rate of the sampling process must be greater than twice the signal rate; wherein the filter tap coefficient solution process uses a matrix inversion, ie R r -1 and matrix multiplication, ie R r -1 P rd calculate.

[0028] Such as figure 2 As shown, the PAM4 signal transmission system includes: a continuous light source, a polarization controller, a Mach-Zehnder modulator, an arbitrary signal generator, a linear amplifier, a standard single-mode optical fiber, a photodetector and a digital storage oscilloscope, wherein: The polarization controller is used to control the polarization state of continuous light, the arbitrary signal amplifier is used to generate a high-speed electrical PAM4 signal, the linear amplifier is used to amplify th...

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Abstract

The invention relates to a wiener filtering method and system for high-speed optical pulse amplitude modulation. A PAM4 electrical signal is modulated to 1.5-micron laser through a Mach-Zehnder modulator, and then transmitted through a single-mode optical fibre; and signal demodulation is realized through interpolation reconstruction and wiener filtering at a receiving end. The wiener filtering method and system disclosed by the invention are suitable for a high-speed PAM4 transmission platform; the signal is filtered by adopting a wiener filter technology; compared with the LMS algorithm, the processing speed is fast; when the receiving optical power is 3dBm, one order of bit error rate of the PAM4 signal can be reduced under same experimental conditions; and thus, the algorithm complexity can be effectively reduced while the transmission performance is improved.

Description

technical field [0001] The invention relates to a technology in the field of optical communication, in particular to an improved Wiener filtering method and system with low algorithm complexity for 80Gbps optical pulse amplitude modulation (PAM4). Background technique [0002] Digital signal processing technology (Digital signal processing, DSP) has great advantages in short-distance optical interconnection applications. With the rapid development of data centers and supercomputers, the research and engineering development of high-speed optical interconnection technology is also facing great opportunities and challenges. Among them, the digital signal processing technology used in the transceiver can greatly improve the signal quality and optimize the link transmission characteristics. [0003] After searching the prior art, it was found that Henning Bülow et al. discussed the existing available optical communication systems in "Electronic dispersion compensation." ("Journa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/524
CPCH04B10/524
Inventor 何祖源张文甲马麟杜江兵游悦
Owner 太比康通讯科技有限公司