Method and device for adjusting coefficient center of adaptive equalizer
A technology of self-adaptive equalization and adjustment method, applied in the direction of shaping network, transmission system, baseband system components in transmitter/receiver, etc. Stability, the effect of reducing the bit error rate
Active Publication Date: 2019-03-12
WUHAN ZHONGXING SOFTWARE CO LTD
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[0006] The main purpose of the present invention is to solve the technical problem that the coefficient center of the adaptive equalizer cannot be effectively adjusted to the center position of the tap coefficient, resulting in system instability
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[0056] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0057] The present invention provides a method for adjusting the coefficient center of an adaptive equalizer applied in a high-speed optical transmission system, referring to figure 2 , in one embodiment, the method for adjusting the coefficient center of the adaptive equalizer includes:
[0058] Step S101, when it is detected that the adaptive equalizer has data input, obtain the input coefficients required by the adaptive equalizer, and monitor whether the coefficient center of the input coefficient is shifted relative to the tap coefficient center;
[0059] The hardware operating environment of the method in this embodiment involves an adaptive equalizer in a high-speed optical transmission system. Based on the effective control of the input coefficient of the adaptive equalizer, the coefficient center of the inpu...
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The invention discloses a method for adjusting the coefficient center of an adaptive equalizer, and is applied to a high-speed optical transmission system. The method for adjusting the coefficient center of the adaptive equalizer includes the steps of: obtaining an input coefficient required by the adaptive equalizer, and monitoring whether offset of the coefficient center of the input coefficient occurs relative to the tap coefficient center; if offset occurs, adjusting the input coefficient; and filtering input data corresponding to the adjusted input coefficient, and performing interpolation and deletion processing is performed on output data after filtering. The invention also discloses a device for adjusting the coefficient center of the adaptive equalizer, the method and device for adjusting the coefficient center of the adaptive equalizer can realize effectively control of the input coefficient of the adaptive balancer, and enables the coefficient center of the input coefficient to be stabilized in the position of the tap coefficient center, thereby improving stability of a system, and reducing the error rate of the system.
Description
technical field [0001] The invention relates to the technical field of high-speed optical transmission, in particular to a method and a device for adjusting the coefficient center of an adaptive equalizer. Background technique [0002] In high-speed optical transmission systems, coherent receivers need to compensate for various impairments in the optical channel, such as polarization film dispersion (Polarization Mode Dispersion, PMD), chromatic dispersion (Chromatic Dispersion, CD) and polarization dependent loss (Polarization Dependent Loss, PDL) etc. The adaptive equalizer uses a digital signal processing technology (Digital Signal Processing, DSP) to adaptively track channel characteristics to compensate for various impairments in the optical channel. [0003] Such as figure 1 As shown, the coherent receiver mainly includes modules such as dispersion compensation, clock recovery, adaptive equalization, frequency offset estimation, and phase offset estimation (wherein, ...
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IPC IPC(8): H04B1/12H04B10/2513H04L25/03
Inventor 蔡轶王卫明周伟勤石峰
Owner WUHAN ZHONGXING SOFTWARE CO LTD