KR970024759A - Digital data transmission and reception device - Google Patents

Digital data transmission and reception device Download PDF

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Publication number
KR970024759A
KR970024759A KR1019950036196A KR19950036196A KR970024759A KR 970024759 A KR970024759 A KR 970024759A KR 1019950036196 A KR1019950036196 A KR 1019950036196A KR 19950036196 A KR19950036196 A KR 19950036196A KR 970024759 A KR970024759 A KR 970024759A
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KR
South Korea
Prior art keywords
output
outputting
data
filtering
delay
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KR1019950036196A
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Korean (ko)
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KR0156195B1 (en
Inventor
허서원
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구자홍
엘지전자 주식회사
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Priority to KR1019950036196A priority Critical patent/KR0156195B1/en
Publication of KR970024759A publication Critical patent/KR970024759A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/01Equalisers

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

Abstract

본 발명은 디지탈 데이타의 송신 및 수신 시스템에 관한 것으로, 특히 QAM(Quadrature Amplitude Modulation) 변조 및 복조에서 파형의 정형을 위한 필터링 과정을 개선하여 하드웨어의 복잡도를 줄일 수 있는 디지탈 데이타의 송신 및 수신장치에 관한 것이다.The present invention relates to a system for transmitting and receiving digital data, and more particularly, to an apparatus for transmitting and receiving digital data that can reduce hardware complexity by improving a filtering process for shaping waveforms in QAM (Quadrature Amplitude Modulation) modulation and demodulation. It is about.

Description

디지탈 데이타의 송신 및 수신장치Digital data transmission and reception device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명의 송신블럭의 필터처리부 구성도,3 is a block diagram of a filter processing unit of a transmission block of the present invention;

제4도는 본 발명의 수신블럭의 필터처리부 구성도.4 is a block diagram of a filter processing unit of a reception block of the present invention.

Claims (4)

디지탈 데이타의 송신장치에 있어서, 순방향 오류정정 코드가 부가된 데이타를 맵핑 처리하여 출력하는 맵핑부와, 상기 맵핑부에서 출력되는 I채널의 출력 데이타를 선형 위상값이 중심축을 기준으로 좌우 대칭으로 나타나는 두 필터의 계수가 순차적으로 입력되어 필터링 및 디지탈 변조 출력하는 제1필터링 수단부와, 상기 맵핑부에서 출력되는 Q채널의 출력 데이타를 선형 위상값이 중심축을 기준으로 좌우 비대칭으로 나타나는 두 필터의 계수가 순차적으로 입력되어 필터링 및 디지탈 변조 출력하는 제2필터링 수단부와, 상기 제1,2필터링 수단부의 출력신호를 선택적으로 출력하는 MUX와, 상기 MUX의 출력신호를 아나로그 변환하는 D/A 변환부를 포함하여 구성됨을 특징으로 하는 디지탈 데이타의 송신장치.A digital data transmitting apparatus comprising: a mapping unit for mapping and outputting data to which a forward error correction code has been added; and outputting data of I channels output from the mapping unit are linearly symmetrical with respect to a central axis. First filtering means for filtering and digitally modulating and outputting the coefficients of the two filters, and the coefficients of the two filters whose linear phase values are asymmetrical with respect to the center axis of the output data of the Q channel output from the mapping unit. Second filtering means for sequentially inputting and filtering and digitally modulating and outputting the MUX, selectively outputting the output signals of the first and second filtering means, and D / A conversion for analog-converting the output signals of the MUX. An apparatus for transmitting digital data, comprising a portion. 제1항에 있어서, 제1필터링 수단부는 맵핑부에서 출력되는 I채널의 출력 데이타를 순차적으로 각각 n차수(0.1, 2, …, n)만큼 지연 출력하는 n개의 지연 수단부와, 더해진 지연차수가 n의 값을 갖는 두개의 지연수단부((0.n), (1,n-1), (2,n-2), …, ()의 지연 출력값을 각각 합산하여 출력하는개의 덧셈기와, 상기 덧셈기의 출력신호와 선형 위상값이 중심축을 기준으로 좌우 대칭으로 나타나는 두 필터의 계수를 차례대로 대응하여 믹싱하고,차수의 지연 수단부의 출력 값과번째의 필터계수를 믹싱하는개의 곱셈기와, 상기 곱셈기의 모든 출력값을 가산하여 출력하는 덧셈기를 포함하여 구성됨을 특징으로 하는 디지탈 데이타의 송신장치.2. The apparatus of claim 1, wherein the first filtering means unit sequentially delays the output data of the I channel output from the mapping unit by n orders (0.1, 2, ..., n), respectively, and an added delay order. Two delay means ((0.n), (1, n-1), (2, n-2), ..., ( Sum the delay output values of Two adders and the output signals of the adder and the coefficients of two filters whose linear phase values are symmetrically with respect to the central axis are sequentially mixed, The output value of the order delay means To mix the first filter coefficient And a multiplier and an adder for adding and outputting all output values of the multiplier. 제1항에 있어서, 제2필터링 수단부는 맵핑부에서 출력되는 Q채널의 출력 데이타를 순차적으로 각가 n차수(0, 1, 2, …, n) 만큼 지연 출력하는 n개의 지연 수단부와, 더해진 지연차수가 n의 값을 갖는 두개의 지연수단부((0,n), (1,n-1), (2,n-2), …, ()의 지연 출력값을 각각 합산하여 출력하는개의 덧셈기와, 선형 위상값의 중심축을 기준으로 좌우 비대칭으로 나타나는 두 필터의 계수를 선택적으로 출력하는,개의 멀티플렉서와, 상기 덧셈기의 출력신호와 멀티플렉서의 출력신호를 믹싱하고,차수의 지연 수단부의 출력값과번째의 멀티플렉서의 출력값을 믹싱하는 각각의개의 곱셈기와, 상기 곱셈기의 모든 출력값을 가산하여 출력하는 덧셈기를 포함하여 구성됨을 특징으로 하는 디지탈 데이타의 송신장치.The method of claim 1, wherein the second filtering means unit adds n delay means for sequentially outputting the output data of the Q channel output from the mapping unit by n orders (0, 1, 2, ..., n) in order. Two delay means ((0, n), (1, n-1), (2, n-2), ..., ( Sum the delay output values of Adders and selectively output the coefficients of two filters asymmetrically with respect to the central axis of the linear phase value, The multiplexer, the output signal of the adder and the output signal of the multiplexer, The output value of the order delay means Each mixing the outputs of the first multiplexer And a multiplier and an adder for adding and outputting all output values of the multiplier. 디지탈 데이타의 수신장치에 있어서, 수신되는 IF 신호를 디지탈 변환 출력하는 A/D 변환부와, 상기 디지탈 변환되어진 I채널의 데이타를 다운 샘플링 하여 필터링 및 디지탈 복조 출력하는 제1필터링 수단부와, 상기 디지탈 변환되어진 Q채널의 데이타를 다운 샘플링하여 필터링 및 디지탈 복조 출력하는 제2필터링 수단부와, 상기 제1, 2필터링 수단부의 출력 데이타를 등화하여 변화된 주파수 특성을 보상 출력하는 등화부를 포함하여 구성됨을 특징으로 하는 디지탈 데이타의 수신장치.An apparatus for receiving digital data, comprising: an A / D converter for digitally converting and receiving an received IF signal, a first filtering means for downsampling, filtering, and digital demodulating and outputting data of the digitally converted I-channel; And a second filtering means for down-sampling, filtering, and digital demodulating and outputting the digitally converted Q channel data, and an equalizing part for equalizing output data of the first and second filtering means to compensate for the changed frequency characteristics. A digital data receiver. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950036196A 1995-10-19 1995-10-19 An apparatus for transmitting and receiving digital data KR0156195B1 (en)

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Application Number Priority Date Filing Date Title
KR1019950036196A KR0156195B1 (en) 1995-10-19 1995-10-19 An apparatus for transmitting and receiving digital data

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Application Number Priority Date Filing Date Title
KR1019950036196A KR0156195B1 (en) 1995-10-19 1995-10-19 An apparatus for transmitting and receiving digital data

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KR970024759A true KR970024759A (en) 1997-05-30
KR0156195B1 KR0156195B1 (en) 1998-11-16

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