KR960027589A - Method and apparatus for determining optimal threshold voltage of optical receiver - Google Patents

Method and apparatus for determining optimal threshold voltage of optical receiver Download PDF

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Publication number
KR960027589A
KR960027589A KR1019940033096A KR19940033096A KR960027589A KR 960027589 A KR960027589 A KR 960027589A KR 1019940033096 A KR1019940033096 A KR 1019940033096A KR 19940033096 A KR19940033096 A KR 19940033096A KR 960027589 A KR960027589 A KR 960027589A
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South Korea
Prior art keywords
signal
optical
threshold voltage
calculating
converting
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KR1019940033096A
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Korean (ko)
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KR970008298B1 (en
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박숭근
장동원
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양승택
재단법인 한국전자통신연구소
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Publication of KR960027589A publication Critical patent/KR960027589A/en
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Publication of KR970008298B1 publication Critical patent/KR970008298B1/en

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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
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/691—Arrangements for optimizing the photodetector in the receiver
    • 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
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/693—Arrangements for optimizing the preamplifier in the receiver

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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)
  • Dc Digital Transmission (AREA)

Abstract

본 발명은 광전송 시스템에서 광수신부의 임계전압을 결정하기 위하여 부분 샘플링방식과 표준편차 계산을 통하여 최적의 임계전압을 결정하기 위한 방법 및 그 장치에 관한 것으로 특히, 온신호의 평균과 오프신호의 평균을 산출하는 제1과정과, 광섬유를 통하여 전송받은 광신호를 전기신호로 변환하여 정형화하는 제2과정과, 상기 제2과정에서 정형화되어진 신호와 상기 제1과정에서 산출되어진 평균치를 비교하여 상기 제2과정에서 정형화되어진 신호를 온신호 또는 오프신호로 분류하는 제3과정과, 상기 제3과정에서 분류되어진 신호를 각각 해당 분류에 따라 신호의 잡음 분산을 계산하는 제4과정 및 상기 제4과정에서 계산되어진 각각의 잡음분산을 제곱근으로 변환하여 임계전압을 산출하는 제5과정을 포함하는 것을 특징으로 하는 광수신부의 최적 임계전압 결정 방법 및 그에 따른 장치를 제공하여 광전송 시스템의 전송품질을 향상하는 효과가 있다.The present invention relates to a method and apparatus for determining an optimal threshold voltage through a partial sampling method and a standard deviation calculation for determining the threshold voltage of an optical receiver in an optical transmission system. The first step of calculating the second, the second step of converting and shaping the optical signal transmitted through the optical fiber into an electrical signal, and comparing the signal normalized in the second step with the average value calculated in the first step In the third process and the fourth process of calculating the noise variance of the signal according to the classification of the signals classified in the third process according to the classification, respectively, in the third process to classify the signal formalized in the second process And a fifth process of calculating the threshold voltage by converting the calculated noise variances to the square root. Providing a threshold voltage enemy determination method and apparatus thereof according to an effect of improving the transmission quality of an optical transmission system.

Description

광수신부의 최적 임계전압 결정 방법 및 그 장치Method and apparatus for determining optimal threshold voltage of optical receiver

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명을 적용한 광전송 시스템의 블럭 구성도, 제3도는 제2도에서의 부분 샘플링부분과 연산처리부분의 신호처리 과정을 설명하기 위한 동작 순서도.2 is a block diagram of an optical transmission system to which the present invention is applied, and FIG. 3 is an operation flowchart for explaining a signal processing procedure of a partial sampling part and an operation processing part in FIG.

Claims (2)

광전송 시스템에서 광수신부의 임계전압을 결정하기 위한 방법에 있어서, 온신호의 평균과 오프신호의 평균을 산출하는제1과정과; 광섬유를 통하여 전송받은 광신호를 전기신호로 변환하여 정형화하는 제2과정과; 상기 제2과정에서 정형화되어진 신호와 상기 제1과정에서 산출되어진 평균치를 비교하여 상기 제2과정에서 정형화되어진 신호를 온신호 또는 오프신호로 분류하는 제3과정과; 상기 제3과정에서 분류되어진 신호를 각각 해당 분류에 따라 신호의 잡음 분산을 계산하는 제4과정; 및 상기 제4과정에서 계산되어진 각각의 잡음 분산을 제곱근으로 변환하여 임계전압을 산출하는 제5과정을 포함하는 것을 특징으로 하는 광수신부의 최적 임계전압 결정 방법.CLAIMS 1. A method for determining the threshold voltage of an optical receiver in an optical transmission system, comprising: a first step of calculating an average of an on signal and an average of an off signal; A second step of shaping and converting the optical signal received through the optical fiber into an electrical signal; A third step of classifying the signal shaped in the second step into an on signal or an off signal by comparing the signal formed in the second step with an average value calculated in the first step; A fourth step of calculating noise variance of the signal classified according to the third step according to the corresponding classification; And a fifth process of calculating a threshold voltage by converting each noise variance calculated in the fourth process into a square root. 전송하고자 하는 내용을 전기적인 신호로 변환하는 정보원과 상기 정보원에서 발생되는 전기적인 신호를 알맞는 전송형태로 변조시켜 레이저의 구동을 온/오프하여 광신호를 광섬유로 전송하는 부호가 혹은 스크램블러등을 광송신부로 구비하고있는 광전송 시스템에서 최적임계치를 유지하기 위한 광수신부에 있어서, 상기 광섬유를 통하여 광신호를 전달받아 광신호를 전기신호로 변환하는 광검출수단과; 상기 광검출 수단에서 변환된 전기신호를 입력받아 증폭 출력하는 전기증폭기수단과; 상기 전치증폭수단을 통하여 입력받은 전기신호를 정형화하는 신호정형수단과; 상기 신호정형수단에서 출력되는 전기신호를 온/오프신호의 표준편차를 참조하여 소정간격을 샘플링하는 샘플링수단과; 상기 샘플링수단에서 출력되는 부분 샘플링 전압을 입력받아 초기 온신호의 잡음 분산과 온/오프신호의 표준편차를 참조하여 최적 임계전압을 산출하는 연산처리수단; 및 상기 신호정형수단에서 출력되는 전기신호를 상기 연산처리수단에서 입력되는 임계전압과 비교하여 온신호혹은 오프신호로 판별하는 식별수단을 포함하는 것을 특징으로 하는 최적 임계전압결정을 위한 광수신부.Code source or scrambler which transmits optical signal to optical fiber by modulating the information source for converting the information to be transmitted into electric signal and the electric signal generated from the information source into proper transmission type An optical receiver for maintaining an optimum threshold in an optical transmission system provided by an optical transmitter, comprising: optical detection means for receiving an optical signal through the optical fiber and converting an optical signal into an electrical signal; Electric amplifier means for receiving and amplifying and outputting the electric signal converted by the light detecting means; Signal shaping means for shaping an electrical signal received through the preamplifier; Sampling means for sampling a predetermined interval of the electrical signal output from the signal shaping means with reference to a standard deviation of an on / off signal; Calculation processing means for receiving the partial sampling voltage output from the sampling means and calculating an optimum threshold voltage with reference to the noise variance of the initial on-signal and the standard deviation of the on / off signal; And identification means for comparing the electrical signal output from the signal shaping means to an on signal or an off signal by comparing with the threshold voltage input from the calculation processing means. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940033096A 1994-12-07 1994-12-07 Optical receiver with optimum threshold voltage and method of determination of voltage KR970008298B1 (en)

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Application Number Priority Date Filing Date Title
KR1019940033096A KR970008298B1 (en) 1994-12-07 1994-12-07 Optical receiver with optimum threshold voltage and method of determination of voltage

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KR960027589A true KR960027589A (en) 1996-07-22
KR970008298B1 KR970008298B1 (en) 1997-05-22

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