JP2020137109A - 偏波スキューの推定装置及び方法 - Google Patents
偏波スキューの推定装置及び方法 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/613—Coherent receivers including phase diversity, e.g., having in-phase and quadrature branches, as in QPSK coherent receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
- H04B10/6162—Compensation of polarization related effects, e.g., PMD, PDL
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Abstract
Description
非特許文献[2] R.R.Muller et al.,“Blind Receiver Skew Compensation and Estimation…”,J.Lightwave Technol.,Vol.33,no.7,p.1315(2015)
非特許文献[3]:S Savory,“Digital filters for coherent optical receivers”,Optics Express,Vol.16,No.2,pp 804(2008)
受信端の適応イコライザーの複数の係数を取得するための係数取得ユニットであって、そのうち、前記適応イコライザーの前記係数には少なくとも次の成分、即ち、送信端の偏波スキュー及び受信端の偏波スキューを含む係数取得ユニット;及び
前記適応イコライザーの複数の係数に基づいて、前記送信端の偏波スキュー及び前記受信端の偏波スキューを計算するためのスキュー計算ユニットを含む。
受信端の適応イコライザーの複数の係数を取得し、そのうち、前記適応イコライザーの前記係数には少なくとも次の成分、即ち、送信端の偏波スキュー及び受信端の偏波スキューを含み;及び
前記適応イコライザーの複数の係数に基づいて、前記送信端の偏波スキュー及び前記受信端の偏波スキューを計算することを含む。
ステップ302:前記適応イコライザーの複数の係数に基づいて、前記送信端の偏波スキュー及び前記受信端の偏波スキューを計算する。
(外1)
成分が含まれ、即ち、送信機及び受信機の偏波スキュー及び受信機xの偏波状態の同相直交スキューが含まれ、それぞれ、τxy,T、τxy,R及びτR,xと表される。そのうち、τR,x=(τxq-τxi)/2であり、同様に、τR,y=(τyq-τyi)/2である。
スキュー計算ユニット702:前記適応イコライザーの複数の係数に基づいて、前記送信端の偏波スキュー及び前記受信端の偏波スキューを計算する。
Claims (10)
- 偏波スキューを推定する装置であって、
受信端の適応イコライザーの複数の係数を取得するための係数取得ユニットであって、前記適応イコライザーの前記係数には少なくとも送信端の偏波スキューの成分及び受信端の偏波スキューの成分が含まれる係数取得ユニット;及び
前記適応イコライザーの複数の係数に基づいて、前記送信端の偏波スキュー及び前記受信端の偏波スキューを計算するためのスキュー計算ユニットを含む、装置。 - 請求項1に記載の装置であって、
前記適応イコライザーの複数の係数に基づいて、前記適応イコライザーの構造を確定するための構造確定ユニットをさらに含む、装置。 - 請求項1に記載の装置であって、
前記適応イコライザーの前記係数には、さらに、前記受信端のx偏波状態の同相直交スキューの成分、及び/又は、前記受信端のy偏波状態の同相直交スキューの成分が含まれ、
前記スキュー計算ユニットは、さらに、前記適応イコライザーの複数の係数を計算することで、前記受信端のx偏波状態の同相直交スキューの成分及び前記受信端のy偏波状態の同相直交スキューの成分を除去し、前記送信端の偏波スキュー及び前記受信端の偏波スキューの成分を残す、装置。 - 請求項1に記載の装置であって、
前記スキュー計算ユニットは、
前記適応イコライザーの一部の係数を計算することで対角要素パラメータφ+(f)を取得し、前記適応イコライザーの他の一部の係数を計算することで副対角要素パラメータφ-(f)を取得し;
前記対角要素パラメータφ+(f)及び前記副対角要素パラメータφ-(f)に基づいて、前記送信端の偏波スキューτxy,T及び前記受信端の偏波スキューτxy,Rの和及び差を計算し;及び
τxy,T及びτxy,Rの和及び差に基づいて、τxy,T及びτxy,Rを計算するように構成される、装置。 - 請求項1に記載の装置であって、
前記係数取得ユニットは、さらに、
受信信号の偏波状態変更後に前記受信端の適応イコライザーの複数の係数を複数回取得し;及び
前記適応イコライザーの複数の係数に対して処理を行うように構成される、装置。 - 偏波スキューを推定する方法であって、
受信端の適応イコライザーの複数の係数を取得し、前記適応イコライザーの前記係数には少なくとも送信端の偏波スキューの成分及び受信端の偏波スキューの成分が含まれ;及び
前記適応イコライザーの複数の係数に基づいて、前記送信端の偏波スキュー及び前記受信端の偏波スキューを計算することを含む、方法。
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CN201910121364.8A CN111585646B (zh) | 2019-02-19 | 2019-02-19 | 偏振态相对时延的估计装置以及方法 |
CN201910121364.8 | 2019-02-19 |
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EP (1) | EP3700152A1 (ja) |
JP (1) | JP2020137109A (ja) |
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US11277207B1 (en) | 2020-08-31 | 2022-03-15 | Huawei Technologies Co., Ltd. | Apparatus and method for in-phase and quadrature skew calibration in a coherent transceiver |
US11581951B1 (en) * | 2022-01-31 | 2023-02-14 | Huawei Technologies Co., Ltd. | Apparatuses and methods of far-end transmitter skew monitoring in digital subcarrier multiplexing systems |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9621382B1 (en) * | 2012-01-17 | 2017-04-11 | Clariphy Communications, Inc. | Channel diagnostics based on equalizer coefficients |
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US7003228B2 (en) | 2001-09-11 | 2006-02-21 | Vitesse Semiconductor Corporation | Method and apparatus for improved high-speed adaptive equalization |
US8345238B2 (en) * | 2008-02-04 | 2013-01-01 | General Photonics Corporation | Measuring optical spectral property of light based on polarization analysis |
US8478135B2 (en) * | 2010-06-30 | 2013-07-02 | Alcatel Lucent | Method and apparatus for polarization-division-multiplexed optical receivers |
US8831081B2 (en) * | 2010-09-01 | 2014-09-09 | Nec Corporation | Digital filter device, digital filtering method and control program for the digital filter device |
CN102420658B (zh) | 2010-09-27 | 2014-10-08 | 富士通株式会社 | 平均长度长短检测装置和方法、以及光相干接收机 |
US8687974B2 (en) * | 2011-01-22 | 2014-04-01 | Viasat, Inc. | Skew compensation and tracking in communications systems |
JP5786427B2 (ja) * | 2011-04-13 | 2015-09-30 | 富士通株式会社 | スキュー低減方法および光伝送システム |
US8983309B2 (en) * | 2012-02-13 | 2015-03-17 | Ciena Corporation | Constrained continuous phase modulation and demodulation in an optical communications system |
JP5888056B2 (ja) * | 2012-03-28 | 2016-03-16 | 富士通株式会社 | デジタル光コヒーレント伝送装置 |
KR20140094350A (ko) * | 2013-01-22 | 2014-07-30 | 한국전자통신연구원 | 측정 장치 및 그것의 신호 전송 시간차 측정 방법 |
CN104348544B (zh) | 2013-08-05 | 2017-11-10 | 北京凌云光子技术有限公司 | 测量光传输信道质量参数的方法及装置 |
JP2015122632A (ja) | 2013-12-24 | 2015-07-02 | 富士通株式会社 | 光通信受信装置 |
US10110317B1 (en) * | 2015-09-04 | 2018-10-23 | Inphi Corporation | Apparatus and methods for transmitter skew and bias error compensation in an optical communication system |
US9806822B1 (en) * | 2016-07-07 | 2017-10-31 | Elenion Technologies, Llc | Coherent optical receiver testing |
JP6690091B2 (ja) * | 2016-07-27 | 2020-04-28 | 富士通株式会社 | 信号処理装置および信号処理方法 |
US10715259B1 (en) * | 2018-01-24 | 2020-07-14 | Inphi Corporation | Impairment compensation techniques for high performance coherent optical transceivers |
US10637584B1 (en) * | 2019-02-28 | 2020-04-28 | Elenion Technologies, Llc | Optical transceiver with integrated optical loopback |
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US9621382B1 (en) * | 2012-01-17 | 2017-04-11 | Clariphy Communications, Inc. | Channel diagnostics based on equalizer coefficients |
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Title |
---|
YANGYANG FAN ET AL.: "Experimental Verification of IQ Imbalance Monitor for High-Order Modulated Transceivers", 2018 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC), JPN6023033788, 23 September 2018 (2018-09-23), pages 1 - 3, XP033445056, ISSN: 0005132697, DOI: 10.1109/ECOC.2018.8535555 * |
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CN111585646A (zh) | 2020-08-25 |
US20200266901A1 (en) | 2020-08-20 |
EP3700152A1 (en) | 2020-08-26 |
CN111585646B (zh) | 2023-03-31 |
US10903911B2 (en) | 2021-01-26 |
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