JP6547648B2 - 光信号対雑音比測定装置及び光信号対雑音比測定方法 - Google Patents
光信号対雑音比測定装置及び光信号対雑音比測定方法 Download PDFInfo
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- JP6547648B2 JP6547648B2 JP2016020118A JP2016020118A JP6547648B2 JP 6547648 B2 JP6547648 B2 JP 6547648B2 JP 2016020118 A JP2016020118 A JP 2016020118A JP 2016020118 A JP2016020118 A JP 2016020118A JP 6547648 B2 JP6547648 B2 JP 6547648B2
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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
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
-
- 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
- H04B10/0791—Fault location on the transmission path
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Spectrometry And Color Measurement (AREA)
Description
12 フォトディテクタ
13 光強度モニタ
14 第1のBPF
15 ADC
16 モニタ制御部
21 第2のBPF
22 算出部
23 校正係数格納部
24 第1の制御部
25 第1の設定部
Claims (6)
- 光信号を電気信号に変換する光電変換部と、
前記電気信号から信号強度を取得する第1の取得部と、
所定の周波数帯域の雑音強度を前記電気信号から取得する第2の取得部と、
前記雑音強度をデジタル変換するデジタル変換部と、
前記信号強度と前記デジタル変換後の前記雑音強度とに基づき、前記光信号に対する光信号対雑音比を算出する算出部と
を有し、
前記所定の周波数帯域は、デジタル変換する際に発生する折り返し雑音を含む周波数帯域であることを特徴とする光信号対雑音比測定装置。 - 前記デジタル変換後の前記雑音強度から監視対象の雑音強度を取得する第3の取得部を有し、
前記算出部は、
前記信号強度と前記監視対象の雑音強度とに基づき、前記光信号に対する前記光信号対雑音比を算出することを特徴とする請求項1に記載の光信号対雑音比測定装置。 - 前記第2の取得部の通過周波数帯域、前記第3の取得部の通過周波数帯域及び前記デジタル変換部のサンプリング周波数を設定する設定部を有することを特徴とする請求項2に記載の光信号対雑音比測定装置。
- 前記第2の取得部で取得された前記雑音強度の周波数帯域の上限周波数は、
前記デジタル変換部のサンプリング周波数の1/2のナイキスト周波数よりも高帯域であることを特徴とする請求項1〜3の何れか一つに記載の光信号対雑音比測定装置。 - 前記信号強度及び前記雑音強度に基づき算出した前記光信号対雑音比が実際の光信号対雑音比に近似するように校正係数を格納した格納部を有し、
前記算出部は、
前記信号強度、前記雑音強度及び前記校正係数に基づき、前記光信号対雑音比を算出することを特徴とする請求項1〜4の何れか一つに記載の光信号対雑音比測定装置。 - 光信号を電気信号に変換し、
前記電気信号から信号強度を取得し、
前記電気信号をデジタル変換する際に発生する折り返し雑音を含む周波数帯域の雑音強度を前記電気信号から取得し、
前記雑音強度をデジタル変換し、
前記信号強度と前記デジタル変換後の前記雑音強度とに基づき、前記光信号に対する光信号対雑音比を算出する
処理を実行することを特徴とする光信号対雑音比測定方法。
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JP2016020118A JP6547648B2 (ja) | 2016-02-04 | 2016-02-04 | 光信号対雑音比測定装置及び光信号対雑音比測定方法 |
US15/418,335 US10374701B2 (en) | 2016-02-04 | 2017-01-27 | Optical signal-to-noise ratio measuring device and optical signal-to-noise ratio measuring method |
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JP2016020118A JP6547648B2 (ja) | 2016-02-04 | 2016-02-04 | 光信号対雑音比測定装置及び光信号対雑音比測定方法 |
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JP2017139657A JP2017139657A (ja) | 2017-08-10 |
JP6547648B2 true JP6547648B2 (ja) | 2019-07-24 |
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CN110108936A (zh) * | 2019-04-30 | 2019-08-09 | 西安西拓电气股份有限公司 | 信号处理方法及装置 |
EP3917034A1 (en) * | 2020-05-27 | 2021-12-01 | Telia Company AB | Monitor of optical fiber |
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CA2357491A1 (en) * | 2001-09-17 | 2003-03-17 | Ralph Mason | Filter tuning using direct digital sub-sampling |
EP1300956A1 (en) * | 2001-10-02 | 2003-04-09 | Matsushita Electric Industrial Co., Ltd. | Receiving apparatus |
KR100501541B1 (ko) * | 2002-12-17 | 2005-07-18 | 한국과학기술원 | 광신호대잡음비 감시장치 |
US7254325B2 (en) * | 2003-05-06 | 2007-08-07 | Fujitsu Limited | Method and system for optical performance monitoring |
US7010443B2 (en) * | 2003-10-31 | 2006-03-07 | Agilent Technologies, Inc. | Noise measurement system and method |
KR100827099B1 (ko) * | 2005-03-30 | 2008-05-02 | 삼성전자주식회사 | 직교 주파수 분할 다중 시스템에서 신호 대 간섭 잡음비추정 장치 및 방법 |
JP2008172520A (ja) * | 2007-01-11 | 2008-07-24 | Mitsubishi Electric Corp | 光snr測定装置及び波長多重伝送システム |
US7668153B2 (en) * | 2007-03-27 | 2010-02-23 | Adc Telecommunications, Inc. | Method for data converter sample clock distribution |
US8532238B2 (en) * | 2010-02-08 | 2013-09-10 | Electronics And Telecommunications Research Institute | Subsampling based receiver using frequency selective noise canceller |
US9209844B2 (en) * | 2012-01-11 | 2015-12-08 | Electronics And Telecommunications Research Institute | Subsampling receiver using interstage off-chip RF band pass filter |
EP2822196B1 (en) * | 2012-03-23 | 2018-05-16 | Huawei Technologies Co., Ltd. | Method and apparatus for detecting optical signal-to-noise ratio, node device, and network system |
US9404738B2 (en) * | 2013-04-25 | 2016-08-02 | Paul Toom | Continuous high resolution surface profiling apparatus and method |
JP2015106829A (ja) * | 2013-11-29 | 2015-06-08 | 富士通株式会社 | 光信号品質モニタ装置、光伝送装置、及び、光信号品質モニタ方法 |
JP6273806B2 (ja) * | 2013-12-03 | 2018-02-07 | 富士通株式会社 | 光信号対雑音比モニタのための校正係数を生成する装置および方法 |
JP6356967B2 (ja) * | 2014-01-07 | 2018-07-11 | ローム株式会社 | Ad変換回路 |
WO2015120585A1 (en) * | 2014-02-12 | 2015-08-20 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangements in multi-band receivers |
US9515727B2 (en) * | 2015-03-05 | 2016-12-06 | Fujitsu Limited | In-band optical signal-to-noise ratio monitor |
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US10374701B2 (en) | 2019-08-06 |
US20170230112A1 (en) | 2017-08-10 |
JP2017139657A (ja) | 2017-08-10 |
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