KR950030638A - Carrier Recovery Device Using Frequency and Phase Synchronization Loop - Google Patents

Carrier Recovery Device Using Frequency and Phase Synchronization Loop Download PDF

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Publication number
KR950030638A
KR950030638A KR1019940007623A KR19940007623A KR950030638A KR 950030638 A KR950030638 A KR 950030638A KR 1019940007623 A KR1019940007623 A KR 1019940007623A KR 19940007623 A KR19940007623 A KR 19940007623A KR 950030638 A KR950030638 A KR 950030638A
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South Korea
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signal
output
phase
frequency
quantizer
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KR1019940007623A
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Korean (ko)
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KR0132496B1 (en
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김기현
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이헌조
엘지전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/02Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06Demodulator circuits; Receiver circuits
    • H04L27/066Carrier recovery circuits
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/12Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00Automatic control of frequency or phase; Synchronisation
    • H03L7/06Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08Details of the phase-locked loop
    • H03L7/081Details of the phase-locked loop provided with an additional controlled phase shifter
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/14Integrated circuits
    • H01L2924/141Analog devices
    • H01L2924/142HF devices
    • H01L2924/1421RF devices
    • H01L2924/14211Voltage-controlled oscillator [VCO]
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001Circuit elements of demodulators
    • H03D2200/0021Frequency multipliers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

한곳에서 위상동기가 이루어지는 특성을 갖는 주파수 및 위상동기화루프를 이용한 반송파 복구장치가 제안되었다. 이 반송파 복구장치는 복수개의 변조된 반송파중에서 하나를 선택 출력하는 튜닝수단; 입력되는 루프(loop)제어신호에 응답하여 정현파신호를 발생하는 발진수단; 그리고 상기 발진수단의 정현파 신호와 튜닝수단으로부터 선택된 변조된 반송파사이에서 설정된 위상 및 주파수 관계를 유지하고, 복구된 정보가 하나의 극성을 갖도록 실질적으로 단지 하나의 위상동기점을 갖는 특성이 있으며, 출력신호를 상기 발진수단에 루프 제어신호로서 제공하는 주파수 및 위상 제어수단이 구비된다.A carrier recovery apparatus using a frequency and phase synchronization loop having a phase synchronization characteristic in one place has been proposed. The carrier recovery apparatus includes tuning means for selectively outputting one of a plurality of modulated carriers; Oscillating means for generating a sinusoidal wave signal in response to an input loop control signal; And maintains the set phase and frequency relationship between the sinusoidal signal of the oscillating means and the modulated carrier selected from the tuning means, and has substantially only one phase synchronization point so that the recovered information has one polarity, and the output Frequency and phase control means for providing a signal to the oscillation means as a loop control signal is provided.

Description

주파수 및 위상 동기화 루프를 이용한 반송파복구장치Carrier Recovery Device Using Frequency and Phase Synchronization Loop

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

제6도는 제1도에서 주파수 및 위상 동기화 루프의 위상검출특성도, 제7도는 주파수 및 위상동기화 루프를 이용한 본 발명에 따른 반송파 복구장치의 구성블럭도, 제8도는 제7도에서 주파수 및 위상 동기화 루프의 위상 검출 특성도.FIG. 6 is a phase detection characteristic diagram of a frequency and phase synchronization loop in FIG. 1, FIG. 7 is a block diagram of a carrier recovery apparatus according to the present invention using a frequency and phase synchronization loop, and FIG. 8 is a frequency and phase in FIG. Phase detection characteristic diagram of synchronization loop.

Claims (9)

복수개의 변조된 반송파중에서 하나를 선택 출력하는 튜닝수단; 입력되는 루프(loop)제어신호에 응답하여 정현파 신호를 발생하는 발진수단; 그리고 상기 발진수단의 정현파 신호와 튜닝수단으로부터 선택된 변조된 반송파사이에서 설정된 위상 및 주파수 관계를 유지하고, 복구된 정보가 하나의 극성을 갖도록 실질적으로 단지 하나의 위상동기점을 갖는 특성이 있으며, 출력신호를 상기 발진수단에 루프제어신호로서 제공하는 주파수 및 위상제어수단이 구비함을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.Tuning means for selectively outputting one of the plurality of modulated carriers; Oscillating means for generating a sine wave signal in response to an input loop control signal; And maintains the set phase and frequency relationship between the sinusoidal signal of the oscillating means and the modulated carrier selected from the tuning means, and has substantially only one phase synchronization point so that the recovered information has one polarity, and the output And a frequency and phase control means for providing a signal to the oscillation means as a loop control signal. 제1항에 있어서, 상기 발진수단은 전압제어발진기(VCO)임을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.The apparatus of claim 1, wherein the oscillating means is a voltage controlled oscillator (VCO). 제1항에 있어서, 상기 튜닝수단으로부터 출력되는 변조된 반송파는 중간주파수 신호임을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.The apparatus of claim 1, wherein the modulated carrier output from the tuning means is an intermediate frequency signal. 제1항에 있어서, 상기 주파수 및 위상제어수단은 상기 튜닝수단으로 부터의 변조된 반송파와 상기 발진수단의 사이에 위치되고 제1 및 구형(quadrature) 비트(beat)신호 및 제2구형비트신호를 만드는 발생수단; 상기 제2구형비트신호를 변환시키는 것에 의해 하나의 위상동기점을 갖는 특성에 해당하는 정보제어신호를 하나의 일정한 진폭신호로서 발생하는 변환수단; 그리고 상기 제1구형비트신호와 상기 변환수단의 출력신호를 곱하여 상기 발진수단에 제공되는 루프제어신호를 만드는 멀티플라이 수단을 구비함을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.The frequency and phase control means of claim 1, wherein the frequency and phase control means are located between the modulated carrier wave from the tuning means and the oscillation means, and the first and quadrature beat signals and the second spherical bit signals. Generating means for making; Conversion means for generating an information control signal corresponding to a characteristic having one phase synchronization point as one constant amplitude signal by converting the second rectangular bit signal; And multiplying means for multiplying the first rectangular bit signal by the output signal of the converting means to produce a loop control signal provided to the oscillating means. 제4항에 있어서, 상기 발생수단은 상기 발진수단으로 부터의 정현파 신호와 튜닝수단으로 부터의 진폭변조된 반송파를 곱하여 제1구형비트신호를 만드는 멀티 플라이어; 상기 정현파신호의 위상을 90°시프트시키는 위상시프터; 그리고 위상시프터의 출력신호와 상기 진폭변조된 반송파를 곱하여 제2구형 비트신호를 만드는 멀티플라이어를 구비함을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.5. The apparatus of claim 4, wherein the generating means comprises: a multiplier for generating a first rectangular bit signal by multiplying a sine wave signal from the oscillating means and an amplitude modulated carrier wave from the tuning means; A phase shifter for shifting the phase of the sinusoidal signal by 90 degrees; And a multiplier for multiplying an output signal of a phase shifter and the amplitude-modulated carrier to form a second rectangular bit signal. 제4항에 있어서, 상기 주파수 및 위상제어수단은 멀티플라이 수단으로부터 출력되는 루프제어신호중 소정의 저주파수대역신호만을 통과시키기 위한 저역통과 필터를 더 구비함을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.5. The carrier recovery method according to claim 4, wherein the frequency and phase control means further comprises a low pass filter for passing only a predetermined low frequency band signal among loop control signals output from the multiply means. Device. 제4항에 있어서, 상기 변환수단은 상기 제2구형비트신호중 소정의 저주파수대역신호만을 통과시키는 제1저역통과필터; 상기 저역통과필터의 출력신호가 설정된 기준값보다 작을 경우 일정한 네거티브 진폭 신호를, 클 경우 일정한 포지티브 진폭신호를 출력하는 제1양자화기; 상기 제1양자화기의 출력신호중 소정의 저주파수 대역 신호만을 통과시키는 제2저역통과필터; 제2저역통과필터의 출력신호가 설정된 기준값보다 작을 경우 일정한 네거티브 진폭신호를, 클 경우 일정한 포지티브 진폭신호를 출력하는 제2양자화기; 그리고 제1양자화기와 제2양자화기의 출력신호를 멀티플라이어하여 상기 정보 제어신호로서 하나의 일정 진폭신호를 출력하는 멀티플라이어로 구성됨을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.5. The apparatus of claim 4, wherein the converting means comprises: a first low pass filter for passing only a predetermined low frequency band signal of the second rectangular bit signals; A first quantizer configured to output a constant negative amplitude signal when the output signal of the low pass filter is smaller than a predetermined reference value, and output a constant positive amplitude signal when it is large; A second low pass filter for passing only a predetermined low frequency band signal among the output signals of the first quantizer; A second quantizer for outputting a constant negative amplitude signal when the output signal of the second low pass filter is smaller than the set reference value, and outputting a constant positive amplitude signal when the output signal of the second low pass filter is smaller than the set reference value; And a multiplier for multiplying output signals of the first quantizer and the second quantizer and outputting a single constant amplitude signal as the information control signal. 제4항에 있어서, 제1양자화기의 기준값은 "0"이고 제2양자화기의 기준값은 소정의 네거티브값임을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파 복구장치.5. The carrier recovery apparatus as set forth in claim 4, wherein the reference value of the first quantizer is "0" and the reference value of the second quantizer is a predetermined negative value. 제7항에 있어서, 상기 정보제어신호는 주파수 동기시에는 포지티브 또는 네거티브값을 갖고 위상 동기시에는 단지 포지티브 값만을 갖는 것을 특징으로 하는 주파수 및 위상 동기화 루프를 이용한 반송파복구장치.8. The carrier recovery apparatus of claim 7, wherein the information control signal has a positive value or a negative value for frequency synchronization and only a positive value for phase synchronization. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019940007623A 1994-04-12 1994-04-12 Carrier wave rehabilitaiton using frequency and phase synchronization loop KR0132496B1 (en)

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KR950030638A true KR950030638A (en) 1995-11-24
KR0132496B1 KR0132496B1 (en) 1998-04-16

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