WO2016082615A1 - Procédé et appareil de filtrage anti-repliement en conversion numérique-analogique - Google Patents

Procédé et appareil de filtrage anti-repliement en conversion numérique-analogique Download PDF

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Publication number
WO2016082615A1
WO2016082615A1 PCT/CN2015/090575 CN2015090575W WO2016082615A1 WO 2016082615 A1 WO2016082615 A1 WO 2016082615A1 CN 2015090575 W CN2015090575 W CN 2015090575W WO 2016082615 A1 WO2016082615 A1 WO 2016082615A1
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WO
WIPO (PCT)
Prior art keywords
signal
digital
filtering
analog
aliasing
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PCT/CN2015/090575
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English (en)
Chinese (zh)
Inventor
张亚静
刘国枫
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2016082615A1 publication Critical patent/WO2016082615A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks

Definitions

  • the working process of the commonly used bias point control algorithm is as follows: a pilot signal of a certain frequency is applied to the bias point voltage of the lithium niobate modulator, and then the difference frequency signal is collected in the output optical signal, when the difference frequency signal When it disappears, the bias point is considered to have been locked to the correct bias point.
  • the lithium niobate modulator integrates a photodetection diode PD for detecting a backlight signal of the optical signal output by the modulator, converting the optical signal into a current signal, and converting the obtained current signal into a voltage signal by the transimpedance amplifier.
  • FIG. 5 is an open-loop Bode diagram of the digital filter circuit F(S) according to an alternative embodiment of the present invention.
  • the digital filter can be well Bandpass filtering is implemented. Since the bilinear transformation method can overcome the multi-valued mapping problem, the digital filter is no longer aliased, so the bilinear transformation method is used here, as follows:
  • this alternative embodiment does not limit the setting of the cutoff frequency and the passband gain.
  • the alternative embodiment provides some preferred device parameters that can be selected as follows:
  • the analog filter circuit portion is a band pass filter capable of high frequency at VTZ.
  • the noise is well attenuated, acts as an anti-aliasing, and effectively amplifies the signal in the passband.
  • the same anti-aliasing filter device (AAF) is used, which mainly includes: an analog band pass filter (ie, the above analog filter unit or analog filter circuit portion) and a digital feedback portion (ie, the above Digital filtering unit or digital filtering circuit part).
  • the PD power tube of the backlight power detecting unit is built in the lithium niobate modulator, and is set to: the optical signal output by the inductive lithium niobate modulator, and converted into corresponding monitoring according to the output optical power.
  • Photoelectric Stream IPD The transimpedance amplifier TZ AMP is configured to convert the photocurrent signal into a voltage signal VTZ, and then send the voltage signal VTZ to the AAF circuit, and the AAF circuit performs filtering and amplifying functions on the detected signal.
  • This embodiment is Application Scenario 1 (AAF has been used in the DATA modulator of an optical module).
  • the pilot signals of f1, f2, f3 are used to divide Time control to achieve the purpose of distinguishing between different locking points.
  • This embodiment is Application Scenario 3 (LiNbO3 modulator that has been used in an optical module).
  • the embodiment of the invention also discloses a computer program, comprising program instructions, which when executed by a computer, enable the computer to perform any of the above-mentioned digital-analog combined anti-aliasing filtering methods.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Optical Communication System (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Amplifiers (AREA)

Abstract

L'invention porte sur un procédé et un appareil de filtrage anti-repliement en conversion numérique-analogique. Le procédé consiste à : effectuer un filtrage sur une partie de signal, supérieure à une fréquence d'échantillonnage fs/2, d'un premier signal à fréquence de différence, et effectuer simultanément une amplification sur une partie de signal, située à l'intérieur d'une bande passante, du premier signal à fréquence de différence, afin d'obtenir un bruit basse fréquence et un deuxième signal à fréquence de différence ; et effectuer un filtrage sur des composantes continues dans le bruit basse fréquence et un signal de tension optique, afin d'obtenir un troisième signal à fréquence de différence. Grâce aux solutions techniques de la présente invention, un changement d'une fréquence de bande passante et un réglage d'un gain de bande passante peuvent être mis en œuvre par réalisation d'un réglage de paramètre différent sur un circuit de partie de filtrage numérique par utilisation seulement d'un registre, ce qui permet d'obtenir des effets de portabilité de circuit souhaitable et de commande précise.
PCT/CN2015/090575 2014-11-27 2015-09-24 Procédé et appareil de filtrage anti-repliement en conversion numérique-analogique WO2016082615A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410707606.9 2014-11-27
CN201410707606.9A CN105703739B (zh) 2014-11-27 2014-11-27 数模结合的抗混叠滤波方法及装置

Publications (1)

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WO2016082615A1 true WO2016082615A1 (fr) 2016-06-02

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PCT/CN2015/090575 WO2016082615A1 (fr) 2014-11-27 2015-09-24 Procédé et appareil de filtrage anti-repliement en conversion numérique-analogique

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CN (1) CN105703739B (fr)
WO (1) WO2016082615A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103257271A (zh) * 2013-05-16 2013-08-21 南京工程学院 一种基于stm32f107vct6的微电网谐波与间谐波检测装置及检测方法
CN103644963A (zh) * 2013-11-28 2014-03-19 陕西千山航空电子有限责任公司 一种振动信号采集处理模块及处理方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8823572B2 (en) * 2012-12-17 2014-09-02 Dust Networks, Inc. Anti-aliasing sampling circuits and analog-to-digital converter
CN108155885B (zh) * 2018-01-11 2023-12-29 深圳互由科技有限公司 一种调谐滤波器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103257271A (zh) * 2013-05-16 2013-08-21 南京工程学院 一种基于stm32f107vct6的微电网谐波与间谐波检测装置及检测方法
CN103644963A (zh) * 2013-11-28 2014-03-19 陕西千山航空电子有限责任公司 一种振动信号采集处理模块及处理方法

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Publication number Publication date
CN105703739A (zh) 2016-06-22
CN105703739B (zh) 2020-06-09

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