Estimation device and method for non-linear distortion and receiver

A nonlinear distortion and nonlinear technology, which is applied in the field of nonlinear distortion estimation devices, can solve the problems of nonlinear damage aggravation, signal spectral density increase, power budget and negative impact of transmission distance, etc., and achieves good universality, high precision effect

Active Publication Date: 2015-10-14
FUJITSU LTD
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Problems solved by technology

In the transmission system with high spectrum efficiency, due to the further increase of the signal spectral density, the nonlinear damage is aggravated, which has a considerable negative impact on the power budget and transmission distance of the system

Method used

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  • Estimation device and method for non-linear distortion and receiver
  • Estimation device and method for non-linear distortion and receiver
  • Estimation device and method for non-linear distortion and receiver

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Embodiment 1

[0048] An embodiment of the present invention provides a nonlinear distortion estimation method. figure 2 is a schematic flow chart of the estimation method of the embodiment of the present invention, such as figure 2 As shown, the estimation method includes:

[0049] Step 201, sampling the band-limited analog signal to obtain a sampling sequence;

[0050] Step 202, calculating the nonlinear perturbation coefficient in the nonlinear distortion estimation based on the Nyquist pulse;

[0051] Step 203, using the nonlinear perturbation coefficient and the sampling sequence to calculate a nonlinear perturbation term superimposed on the signal; and

[0052] Step 204, using the nonlinear perturbation term to calculate the nonlinear distortion waveform.

[0053] In this embodiment, the nonlinear estimation model of an arbitrary band-limited signal takes sampled values ​​of signal waveforms and link parameters as inputs, and outputs nonlinearly distorted waveforms. It is worth n...

Embodiment 2

[0133] An embodiment of the present invention provides a device for estimating nonlinear distortion, which corresponds to the method for estimating nonlinear distortion in Embodiment 1, and the same content will not be repeated here.

[0134] Image 6 is a schematic diagram of the structure of the estimation device of the embodiment of the present invention, such as Image 6 As shown, the estimation device 600 includes: a signal sampling unit 601, a coefficient calculation unit 602, a perturbation item calculation unit 603, and a waveform estimation unit 604;

[0135] Among them, the signal sampling unit 601 samples the band-limited analog signal to obtain a sampling sequence; the coefficient calculation unit 602 calculates the nonlinear perturbation coefficient in the nonlinear distortion estimation based on the Nyquist pulse; the perturbation item calculation unit 603 uses the The nonlinear perturbation coefficient and the sampling sequence are used to calculate a nonlinear...

Embodiment 3

[0144] An embodiment of the present invention provides a receiver, and the electronic device includes the estimating apparatus 600 as described in Embodiment 2.

[0145] Figure 8 It is a schematic structural diagram of a receiver according to an embodiment of the present invention. like Figure 8 As shown, the receiver 800 may include: a central processing unit (CPU) 200 and a memory 210 ; the memory 210 is coupled to the central processing unit 200 . Among them, the memory 210 can store various data; in addition, it also stores information processing programs, and executes the programs under the control of the central processing unit 200 .

[0146] In one embodiment, the functions of the estimation device 600 can be integrated into the central processing unit 200 . Wherein, the central processing unit 200 may be configured to implement the estimation method as described in Embodiment 1.

[0147] In another embodiment, the estimating device 600 can be configured separatel...

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Abstract

Embodiments of the present disclosure provide an estimation apparatus and method for nonlinear distortion and a receiver. The estimation method for nonlinear distortion includes: sampling a band-limited analog signal to obtain a sampling sequence; calculating a nonlinear perturbation coefficient in nonlinear distortion estimation based on a Nyquist pulse; calculating a nonlinear perturbation term superimposed on a signal by using the nonlinear perturbation coefficient and the sampling sequence; and calculating a nonlinear distortion waveform by using the nonlinear perturbation term. With the embodiments of the present disclosure, not only any modulation formats are compatible, but also advantages of high precision and good adaptability may be achieved.

Description

technical field [0001] The invention relates to a long-distance optical fiber communication system, in particular to a nonlinear distortion estimation device, method and receiver. Background technique [0002] Based on the slowly varying envelope approximation and the assumption of a constant polarization state, the propagation equation of the pulse evolution in the fiber can be described by the nonlinear Schrödinger equation (for example, the Manakov equation for random polarization). This transmission equation is used to describe the waveform evolution of the optical pulse signal under the joint action of dispersion and Kerr effect. However, since the nonlinear Schrödinger equation has no analytical solution under the consideration of the nonlinear and dispersion effects, the quantitative research on fiber nonlinear damage and related theoretical models are all developed and established for the approximate solution of the nonlinear Schrödinger equation. [0003] Since the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L25/08
CPCH04B10/0795H04B10/60H04B10/6163
Inventor 赵颖窦亮陶振宁
Owner FUJITSU LTD
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