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Equalizing device for compensating rapid state of polarization changes of optical signal

An equalization device, a technology for optical signals, applied in optical fiber transmission, elimination of distortion/dispersion, electrical components, etc., can solve problems such as inability to track and compensate for rotational speed, unrealistic training overhead, etc.

Active Publication Date: 2021-06-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although DSP based 2×2 MIMO channel estimation improves the performance of 2×2 MIMO equalizers, it cannot track and compensate for ultra-fast SOP rotation speeds caused by lightning current-induced currents on air-fiber links unless impractical training overhead

Method used

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  • Equalizing device for compensating rapid state of polarization changes of optical signal
  • Equalizing device for compensating rapid state of polarization changes of optical signal
  • Equalizing device for compensating rapid state of polarization changes of optical signal

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Embodiment Construction

[0064] figure 1 An equalization device 100 according to an embodiment of the invention is shown. The equalization device 100 is used in particular for processing a digital signal 101 . The digital signal 101, for example may be generated by an optical receiver 200, is derived from an optical signal 201 transmitted on a transmission channel 202 (see figure 2 ).

[0065] The apparatus 100 includes a first 2×2 MIMO equalizer 102 and a second 2×2 MIMO equalizer 105 , and the second equalizer 105 is arranged after the first equalizer 102 . Therefore, the first equalizer 102 and the second equalizer 105 can be decoupled from each other.

[0066] The first 2×2 MIMO equalizer 102 is used to perform a first equalization 103 on the digital signal 101 . The first equalization 103 is supported by 2×2 MIMO channel estimation 104 based on the channel 202 of the digital signal 101 . In particular, the first equalization 103 takes the channel estimation result (ie, the estimated value o...

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Abstract

The present invention relates to the technical field of processing, particularly equalizing a digital signal, wherein the equalizing is supported by 2*2 MIMO channel estimation and State of Polarization (SOP) estimation. The invention presents an equalizing device, and optical receiver including the equalizing device, a corresponding method and an optical signal with a frame structure for enabling the method. The equalizing device includes a first 2*2 MIMO equalizer configured to perform a first equalization on the digital signal, supported by a 2*2 MIMO channel estimation of the channel based on the digital signal. Further, the device includes a second 2*2 MIMO equalizer, arranged after the first equalizer and configured to perform a second equalization on the digital signal, supported by a SOP estimation of the optical signal based on the digital signal.

Description

technical field [0001] The present invention relates generally to processing digital signals, and more particularly to equalizing digital signals. The digital signal is specifically derived from the optical signal transmitted on the channel, therefore, the invention also relates to channel estimation. In particular, the invention relates to the equalization of digital signals in the presence of rapid state of polarization (SOP) changes of optical signals, and therefore, the invention also relates to SOP estimation. The invention can be applied to the field of optical fiber composite overhead ground wire (optical ground wire, OPGW) optical cable. [0002] The present invention proposes an equalization device, an optical receiver including the equalization device and an equalization method performed by eg the equalization device or the optical receiver. The invention also proposes an optical signal comprising frames with a frame structure enabling equalization of fast SOP chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2507
CPCH04B10/2572H04B7/0413H04B10/6165H04B10/6971
Inventor 法比奥·皮特塔拉马克西姆·库什内罗夫科尔雅·舒伯特罗伯特·埃尔施纳卡斯滕·施密特-朗霍斯特
Owner HUAWEI TECH CO LTD