KR950016116A - Synchronous Tracking and Circuit in the Direct Spread Spectrum Receiver - Google Patents

Synchronous Tracking and Circuit in the Direct Spread Spectrum Receiver Download PDF

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Publication number
KR950016116A
KR950016116A KR1019930025955A KR930025955A KR950016116A KR 950016116 A KR950016116 A KR 950016116A KR 1019930025955 A KR1019930025955 A KR 1019930025955A KR 930025955 A KR930025955 A KR 930025955A KR 950016116 A KR950016116 A KR 950016116A
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KR
South Korea
Prior art keywords
spread spectrum
multipliers
value
synchronous
receiver
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Application number
KR1019930025955A
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Korean (ko)
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KR960000612B1 (en
Inventor
정성헌
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김광호
삼성전자 주식회사
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Priority to KR1019930025955A priority Critical patent/KR960000612B1/en
Publication of KR950016116A publication Critical patent/KR950016116A/en
Application granted granted Critical
Publication of KR960000612B1 publication Critical patent/KR960000612B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B2001/70724—Spread spectrum techniques using direct sequence modulation featuring pilot assisted reception

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

직접 대역확산방식에 의한 수신기의 동기 추적방식에 있어서, 상기 수신데이타를 중간주파수로 다운한 후 디지탈화하고, 상기 디지탈화된 값을 현재(P), 이전(E), 이후(L)의 파이롯신호의 상관값과 곱하여 지연하며, 상기 지연값과 이전 자기값을 곱하여 누산한다. 상기의 값으로 부터 차신호를 구하고 동기신호를 검출하여 상기 검출된 동기에 따라 상기 차신호로 클럭발생을 조정하여 동기를 계속 추적 유지한다.In a synchronous tracking method of a receiver using a direct spread spectrum method, after receiving the data down to an intermediate frequency, the received data is digitized, and the digitized values are present (P), before (E), and after (L) pilot signals. Delay by multiplying by the correlation value of and multiplying the delay value by the previous magnetic value to accumulate. The difference signal is obtained from the above values, the synchronization signal is detected, and the clock generation is adjusted to the difference signal according to the detected synchronization to keep track of the synchronization.

Description

직접대역 확산방식의 수신기에 있어서 동기 추적방식 및 회로Synchronous Tracking and Circuit in the Direct Spread Spectrum Receiver

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

제3도는 본 발명에 따른 직접 대역 확산방식의 동기 추적회로도.3 is a synchronization tracking circuit diagram of a direct spread spectrum method according to the present invention.

Claims (2)

PN발생기(62), 클럭 발생기(61), 클럭조정기(62), 가산기(63), 클럭조정기(60), 클럭방생기(61), PN발생기(62), 곱셈기(45∼47, 51∼53), 누산기(54∼56)를 구비한 직접대역 확산수신기의 동기 추적회로에 있어서, 상기 곱셈기(45∼47)의 출력을 지연하는 지연기(48∼50)와, 상기 지연기(48∼50)의 출력과 상기 곱셈기(45∼47)의 출력을 곱셈하여 상기 자기 상관함수를 구하여 누산기(55)에 제공되어 상기 구한 상관함수에 따라 동기를 추적하는 곱셈기(51∼53)로 구성됨을 특징으로 하는 직접대역 확산방식의 수신기에 있어서 동기추적회로.PN generator 62, clock generator 61, clock adjuster 62, adder 63, clock adjuster 60, clock generator 61, PN generator 62, multipliers 45-47, 51-. 53. A synchronous tracking circuit of a direct band spreading receiver having accumulators 54 to 56, comprising: delayers 48 to 50 for delaying outputs of the multipliers 45 to 47, and delayers 48 to 48; 50) and the output of the multipliers 45 to 47 to multiply the output of the multipliers 45 to 47 to obtain the autocorrelation function, and to the accumulator 55 to track synchronization according to the obtained correlation function. A synchronization tracking circuit in a direct spread spectrum receiver. 직접 대역확산방식에 의한 수신기의 동기 추적방식에 있어서, 상기 수신데이타를 중간주파수로 다운한 후 디지탈화하는 제1과정과, 상기 제1과정의 디지탈화된 값을 현재(P), 이전(E), 이후(L)의 파이롯신호의 상관값과 곱하여 지연하는 제2과정과, 상기 제2과정의 지연값과 이전 자기값을 곱하여 누산하는 제3과정과, 상기 제3과정의 값으로 부터 차신호를 구하고 동기신호를 검출하여 상기 검출된 동기에 따라 상기 차신호로 클럭발생을 조정하여 동기를 계속 추적 유지하는 제4과정으로 이루어짐을 특징으로 하는 직접 대역확산 방식의 수신기에 있어서 동기 추적방식.In the synchronous tracking method of a receiver using a direct spread spectrum method, the first process of digitizing the received data after downgrading the received data to an intermediate frequency, and the current (P), transfer (E), A second process of delaying by multiplying by a correlation value of a subsequent pilot signal (L), a third process of multiplying and accumulating a delay value of the second process and a previous magnetic value, and a difference signal from a value of the third process And a fourth process of detecting a synchronous signal, adjusting a clock generation with the difference signal according to the detected synchronous signal, and continuing to keep track of the synchronous signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930025955A 1993-11-30 1993-11-30 Synchronization tracking method and circuit in direct sequence/spread spectrum receiver KR960000612B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930025955A KR960000612B1 (en) 1993-11-30 1993-11-30 Synchronization tracking method and circuit in direct sequence/spread spectrum receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930025955A KR960000612B1 (en) 1993-11-30 1993-11-30 Synchronization tracking method and circuit in direct sequence/spread spectrum receiver

Publications (2)

Publication Number Publication Date
KR950016116A true KR950016116A (en) 1995-06-17
KR960000612B1 KR960000612B1 (en) 1996-01-09

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KR1019930025955A KR960000612B1 (en) 1993-11-30 1993-11-30 Synchronization tracking method and circuit in direct sequence/spread spectrum receiver

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100458341B1 (en) * 1996-01-30 2005-04-06 소니 가부시끼 가이샤 Wireless receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100458341B1 (en) * 1996-01-30 2005-04-06 소니 가부시끼 가이샤 Wireless receiver

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KR960000612B1 (en) 1996-01-09

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