CN107534629A - Decision feedback equalization device, method and optical transmission system - Google Patents
Decision feedback equalization device, method and optical transmission system Download PDFInfo
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- CN107534629A CN107534629A CN201580078482.5A CN201580078482A CN107534629A CN 107534629 A CN107534629 A CN 107534629A CN 201580078482 A CN201580078482 A CN 201580078482A CN 107534629 A CN107534629 A CN 107534629A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 18
- 238000012545 processing Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 abstract description 11
- 238000005070 sampling Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 238000003491 array Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000013307 optical fiber Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/01—Equalisers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
Claims (15)
- A decision feedback equalization apparatus, comprising:the first equalizer, the first adder, the first decision unit, the second equalizer, the third equalizer, the second adder and the second decision unit;the first equalizer is used for receiving signals and equalizing the received signals;the first adder is configured to add an output signal of the first equalizer and an output signal of the second equalizer;the first decision unit is configured to decide an output signal of the first adder;the second equalizer is used for equalizing the output signal of the first decision unit;the third equalizer is used for performing equalization processing on the output signal of the first adder;the second adder is configured to add an output signal of the third equalizer and an output signal of the second equalizer;and the second decision unit is configured to decide an output signal of the second adder and output the decided signal.
- The decision feedback equalization apparatus of claim 1, further comprising:the fourth adder, the first coefficient updating module, the second coefficient updating module, the fifth adder and the third coefficient updating module;the fourth adder is configured to add the output signal of the first decision unit and the output signal of the first equalizer to obtain a first error signal;the first coefficient updating module is configured to update a first tap coefficient of the first equalizer according to the first error signal, and output the first tap coefficient to the first equalizer;the second coefficient updating module is configured to update a second tap coefficient of the second equalizer according to the first error signal, and output the second tap coefficient to the second equalizer;the fifth equalizer is configured to generate a second equalizer output signal according to the second error signal;the third coefficient updating module is configured to update a third tap coefficient of the third equalizer according to the second error signal, and output the third tap coefficient to the third equalizer.
- The apparatus according to claim 1, wherein the first coefficient updating module, the second coefficient updating module and the third coefficient updating module all update tap coefficients by a least mean square algorithm.
- The apparatus according to claim 3, wherein the step size of the first coefficient update module updating the first tap coefficients of the first equalizer is not equal to the step size of the second coefficient update module updating the second tap coefficients of the second equalizer.
- The decision feedback equalization apparatus of any of claims 1-4 wherein the first equalizer, the second equalizer, and the third equalizer are all transversal digital filters.
- A receiver comprising a decision feedback equalization apparatus as claimed in any one of claims 1 to 5.
- An optical transmission system comprising a transmitter for transmitting an optical signal and the receiver of claim 6.
- A signal processing method, comprising the steps of:receiving a first signal, and carrying out equalization processing on the received first signal to obtain a second signal;adding the second signal and the third signal to obtain a fourth signal;judging the fourth signal to obtain a fifth signal;carrying out equalization processing on the fifth signal, and taking an equalization result as a new third signal;performing equalization processing on the fourth signal to obtain a sixth signal;adding the sixth signal and the new third signal to obtain a seventh signal;and judging the seventh signal and outputting an eighth judged signal.
- The signal processing method of claim 8, further comprising:adding the fifth signal and the second signal to obtain a first error signal;updating a first tap coefficient according to the first error signal, and outputting the first tap coefficient;updating a second tap coefficient according to the first error signal, and outputting the second tap coefficient;adding the eighth signal and the sixth signal to obtain a second error signal;and updating the third tap coefficient according to the second error signal, and outputting the third tap coefficient.
- The signal processing method of claim 9, wherein the first tap coefficient, the second tap coefficient and the third tap coefficient are all updated using a least mean square algorithm.
- The signal processing method of claim 10, wherein the step size for updating the first tap coefficient is not equal to the step size for updating the second tap coefficient.
- A data communication device comprising a processor, a memory and a bus system via which the processor and the memory are connected, the memory being adapted to store instructions and the processor being adapted to execute instructions stored by the memory,wherein the processor is configured to: receiving a first signal, and carrying out equalization processing on the received first signal to obtain a second signal; adding the second signal and the third signal to obtain a fourth signal; judging the fourth signal to obtain a fifth signal; carrying out equalization processing on the fifth signal, and taking an equalization result as a new third signal; performing equalization processing on the fourth signal to obtain a sixth signal; adding the sixth signal and the new third signal to obtain a seventh signal; and judging the seventh signal and outputting an eighth judged signal.
- The data communication apparatus of claim 12, wherein the processor is further configured to:adding the fifth signal and the second signal to obtain a first error signal;updating a first tap coefficient according to the first error signal, and outputting the first tap coefficient;updating a second tap coefficient according to the first error signal, and outputting the second tap coefficient;adding the eighth signal and the sixth signal to obtain a second error signal;and updating the third tap coefficient according to the second error signal, and outputting the third tap coefficient.
- The data communication apparatus according to claim 13, wherein the first tap coefficient, the second tap coefficient and the third tap coefficient are each updated using a least mean square algorithm.
- The data communication apparatus according to claim 14, wherein a step size for updating the first tap coefficient is not equal to a step size for updating the second tap coefficient.
Applications Claiming Priority (1)
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PCT/CN2015/076346 WO2016161643A1 (en) | 2015-04-10 | 2015-04-10 | Decision feedback equalization apparatus and method, and optical transmission system |
Publications (2)
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CN107534629A true CN107534629A (en) | 2018-01-02 |
CN107534629B CN107534629B (en) | 2020-02-14 |
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CN201580078482.5A Active CN107534629B (en) | 2015-04-10 | 2015-04-10 | Decision feedback equalization device and method and optical transmission system |
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WO (1) | WO2016161643A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113595949A (en) * | 2021-09-30 | 2021-11-02 | 苏州浪潮智能科技有限公司 | Self-adaptive PAM4 decision feedback equalization circuit |
CN115314347A (en) * | 2022-07-28 | 2022-11-08 | 苏州大学 | Optical signal decision feedback equalizer based on Gaussian mixture model |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109981500B (en) * | 2017-12-28 | 2023-04-28 | 海思光电子有限公司 | Signal processing method and signal processing device |
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JP3499768B2 (en) * | 1999-04-05 | 2004-02-23 | 松下電器産業株式会社 | Waveform equalizer, mobile radio apparatus using the same, base station radio apparatus, and mobile communication system |
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US20100020862A1 (en) * | 2008-07-25 | 2010-01-28 | Taiwan Semiconductor Manufacturing Co., Ltd. | Input control circuit for the summer of a decision feedback equalizer |
CN101807940B (en) * | 2010-01-22 | 2013-03-27 | 北京航空航天大学 | Anti-multipath interference device of GNSS receiving system and method thereof |
CN102164106B (en) * | 2011-04-15 | 2014-07-16 | 南京信息工程大学 | Fractionally spaced decision feedback Rayleigh Renyi entropy wavelet blind equalization method |
CN102647376B (en) * | 2012-03-14 | 2015-04-08 | 华为技术有限公司 | Signal processing method and device as well as terminal |
-
2015
- 2015-04-10 WO PCT/CN2015/076346 patent/WO2016161643A1/en active Application Filing
- 2015-04-10 CN CN201580078482.5A patent/CN107534629B/en active Active
Patent Citations (5)
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JP3499768B2 (en) * | 1999-04-05 | 2004-02-23 | 松下電器産業株式会社 | Waveform equalizer, mobile radio apparatus using the same, base station radio apparatus, and mobile communication system |
CN101098416A (en) * | 2006-06-29 | 2008-01-02 | 上海高清数字科技产业有限公司 | Time domain self-adaptive equalizer and decision feedback filter included therein |
CN101325458A (en) * | 2007-06-13 | 2008-12-17 | 日立通讯技术株式会社 | Optical transmission equipment and method for controlling thereof |
CN103229473A (en) * | 2012-12-28 | 2013-07-31 | 华为技术有限公司 | Decision feedback balancer and receiver |
CN103401821A (en) * | 2013-07-22 | 2013-11-20 | 苏州英菲泰尔电子科技有限公司 | Adaptive equalizer of Bluetooth 4.0 low-power receiver and implementation method of adaptive equalizer |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113595949A (en) * | 2021-09-30 | 2021-11-02 | 苏州浪潮智能科技有限公司 | Self-adaptive PAM4 decision feedback equalization circuit |
WO2023050662A1 (en) * | 2021-09-30 | 2023-04-06 | 苏州浪潮智能科技有限公司 | Self-adaptive pam4 decision feedback equalization circuit |
US11881971B2 (en) | 2021-09-30 | 2024-01-23 | Inspur Suzhou Intelligent Technology Co., Ltd. | Adaptive PAM4 decision feedback equalization circuit |
CN115314347A (en) * | 2022-07-28 | 2022-11-08 | 苏州大学 | Optical signal decision feedback equalizer based on Gaussian mixture model |
Also Published As
Publication number | Publication date |
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CN107534629B (en) | 2020-02-14 |
WO2016161643A1 (en) | 2016-10-13 |
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