KR870004597A - Data Modulation and Demodulation Method using Orthogonal Sine / Cosine Waveform and Data Communication System - Google Patents

Data Modulation and Demodulation Method using Orthogonal Sine / Cosine Waveform and Data Communication System Download PDF

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Publication number
KR870004597A
KR870004597A KR1019850007600A KR850007600A KR870004597A KR 870004597 A KR870004597 A KR 870004597A KR 1019850007600 A KR1019850007600 A KR 1019850007600A KR 850007600 A KR850007600 A KR 850007600A KR 870004597 A KR870004597 A KR 870004597A
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South Korea
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data sequence
signal
frequency
waveform
cosine
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KR1019850007600A
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Korean (ko)
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KR880001370B1 (en
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은종관
류승문
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전학제
한국과학기술원
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/38Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40Transmitting circuits; Receiving circuits
    • H04L25/49Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

내용 없음No content

Description

직교 정현/여현 파형을 이용한 데이타 변조 및 복조방식과 데이타 통신 시스템Data Modulation and Demodulation Method using Orthogonal Sine / Cosine Waveform and Data Communication System

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

제1도는 본 방식에 의해 발생된 신호의 합성 과정을 도시한 도면.1 is a diagram illustrating a synthesis process of a signal generated by the present scheme.

제2도는 본 발명의 변조 방식을 도시한 블럭도.2 is a block diagram showing a modulation scheme of the present invention.

제3도는 본 발명에 사용된 직교 여현 파형용 신호 합성기의 블럭도.3 is a block diagram of a signal synthesizer for an orthogonal cosine waveform used in the present invention.

Claims (3)

전송할 데이타 시이퀸스를 매 주기마다 교호적으로 분주하여 제1 데이타 시이퀸스군과 제2 데이타 시이퀸스군으로 분할하여 제1데이타 시이퀸스군의 신호는 직교 여현 파형용 신호 합성기(2a)에서 낮은 주파수의 직교 여현 파형의 변조 신호를 얻은 후 여현 반송 주파수를 곱하여 주파수를 변환시키며, 제2데이타 시이퀸스군의 신호는 직교 여현 파형용 신호 합성기(2b)에서 낮은 주파수의 직교 여현 파형의 변조신호를 얻은 후 정현 반송 주파수를 곱하여 주파수를 변환시켜서, 각각 덧셈기(4)로 더한 후 대역 여파기(5)로 불요 신효 성분을 제거함으로써 높은 주파수의 직교 여현 파형의 변조 신호와 높은 주파수의 직교 정현 파형의 변조 신호가 중첩되도록 함을 특징으로 하는 정현/여현 파형을 이용한 데이타 변조 방식.The data sequence to be transmitted is alternately divided every cycle, divided into a first data sequence group and a second data sequence group, so that the signal of the first data sequence group has a low frequency in the orthogonal cosine waveform signal synthesizer 2a. After obtaining the modulated signal of the orthogonal cosine waveform of, the frequency is converted by multiplying the cosine carrier frequency, and the signal of the second data sequence group is obtained from the orthogonal cosine waveform signal synthesizer (2b). The frequency is converted by multiplying the sinusoidal carrier frequency, and then added with an adder (4), and then removed with unnecessary band components by the band filter (5). The modulation signal of the high frequency orthogonal sinusoidal waveform and the modulation signal of the high frequency orthogonal sinusoidal waveform A data modulation scheme using sinusoidal / cosine waveforms characterized in that superimposes the superposition. 제1항에 의한 변조 방식에 의하여 변조된 신호를 한쪽은 여헌 기준 신호를 곱하여 수신된 변조 신호의 주파수를 낮추어 직교 여현 파형을 이용한 변조 방식에 의해 변조된 데이타 시이퀸스를 복조하여 제1데이타 시이퀸스를 추출하고, 다른 한 쪽은 정현 파형 기준 신호를 곱하여 수신된 변조 신호의 주파수를 낮춘 후 직교 정현 파형을 이용한 변조방식에 의해 변조된 데이타 시이튄스를 복조하여 제2데이타 시이퀸스를 추출하여, 이 추출된 제1 데이타 시이튄스와 제2 데이타 시이퀸스를 절환기(demultiplexer)로 순차적으로 더하여 원래의 데이타 시이퀸스(dk)로 복조되게 함을 특징으로 하는 여현/정현 파형을 이용한 데이타 복조 방식.The signal modulated by the modulation method according to claim 1 is multiplied by a reference signal to reduce the frequency of the received modulation signal to demodulate the data sequence modulated by the modulation method using an orthogonal cosine waveform to obtain a first data sequence. The other side is multiplied by the sinusoidal waveform reference signal to lower the frequency of the received modulation signal, and then demodulates the data sequence splattered by the modulation method using the orthogonal sinusoidal waveform to extract the second data sequence. A method of demodulating data using a cosine / sinusoidal waveform, wherein the extracted first data sequence and second data sequence are sequentially added to a demultiplexer to demodulate the original data sequence (d k ). 데이타통신 시스템에 있어서, 송신부에서는 데이타 시이퀸스를 매 주기마다 교호적으로 분주하여 제1데이타 시이퀸스군과 제2데이타 시이퀸스군으로 분할하여 제1 데이타 시이퀸스군의 신호는 직교 여현파형용 신호 합성기(2a)에서 낮은 주파수의 직교 여현 파형의 변조 신호를 얻은 후 여현 반송 주파수를 곱하여 주파수를 변환시키며, 제2 데이타 시이퀸스군의 신호는 직교 여현 파형용 신호 합성기(2b)에서 낮은 주파수의 직교 여현 파형의 변조 신호를 얻은 후 정현 반송 주파수를 곱하여 주파수를 변환시켜서, 각각 덧셈기(4)로 더한 후 대역 여파기(5)로 불요 성분을 제거하여 높은 주파수의 직교 여현 파형의 변조 신호와 직교 정현 파형의 변조 신호를 중첩하여 전송로를 통하여 송신하고 수신부에서는 수신된 데이타변조 신호에 한쪽은 여현 기준 신호를 곱하여 수신된 변조 신호의 주파수를 낮추어 직교 여현 파형을 이용한 변조 방식에 의해 변조된 데이타 시이퀸스를 복조하여 제2 데이타 시이퀸스를 추출하고, 다른 한쪽은 정현 파형 기준 신호를 곱하여 수신된 변조 신호의 주파수를 낮춘 후 직교 정현 파형을 이용항 변조 방식에 의해 변조된 데이타 시이퀸스를 복조하여 제2데이타 시이퀸스를 추출하여, 이 추출된 제1 및 제2 데이타 시이퀀스를 절환기로 순차적으로 더하여 원래의 데이타 시이퀀스로 복조되게 하여 한 전송로에2개로 분할된 신호를 분할된 신호 간의 간섭없이 동시에 전송하여 데이타 전송속도를 높이게 함을 특징으로 하는 정현/여현 파형을 이용한 데이타 통신 시스템.In the data communication system, the transmitting unit alternately divides the data sequence every cycle, divides the data sequence into a first data sequence group and a second data sequence group, and the signal of the first data sequence group is a quadrature cosine waveform signal. The modulator 2a obtains a modulated signal of a low frequency orthogonal cosine waveform and multiplies the cosine carrier frequency to convert frequencies. The signal of the second data sequence group is orthogonal to a low frequency orthogonal cosine waveform synthesizer 2b. After acquiring the modulated signal of the cosine waveform, multiply it by the sinusoidal carrier frequency to convert the frequency, add it with the adder (4), and then remove the unnecessary components with the band filter (5) to modulate the quadrature and quadrature sinusoidal waveform of high frequency. Superimposed modulated signals are transmitted through the transmission path, and the receiver receives coarse reference signal on one side of the received data modulation signal. By lowering the frequency of the received modulation signal by multiplying by arc, demodulating the data sequence modulated by the modulation method using the orthogonal cosine waveform, the second data sequence is extracted, and the other side is multiplied by the sinusoidal waveform reference signal to receive the received modulation signal. After lowering the frequency of the quadrature sinusoidal waveform, the data sequence modulated by the modulation method is used to demodulate the second data sequence, and the extracted first and second data sequences are sequentially added to the switcher. A data communication system using sinusoidal / cosine waveforms, characterized by demodulating data sequences of two signals to simultaneously transmit two divided signals in one transmission path without interference between the divided signals. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019850007600A 1985-10-16 1985-10-16 Data modulation demodulation system and data communication system KR880001370B1 (en)

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KR1019850007600A KR880001370B1 (en) 1985-10-16 1985-10-16 Data modulation demodulation system and data communication system

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KR880001370B1 KR880001370B1 (en) 1988-07-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100331012B1 (en) * 1998-01-30 2002-04-01 모리시타 요이찌 Modulation method and radio communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100331012B1 (en) * 1998-01-30 2002-04-01 모리시타 요이찌 Modulation method and radio communication system

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