KR970055718A - Synchronization tracking device using 3 correlators and its method - Google Patents

Synchronization tracking device using 3 correlators and its method Download PDF

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Publication number
KR970055718A
KR970055718A KR1019950047865A KR19950047865A KR970055718A KR 970055718 A KR970055718 A KR 970055718A KR 1019950047865 A KR1019950047865 A KR 1019950047865A KR 19950047865 A KR19950047865 A KR 19950047865A KR 970055718 A KR970055718 A KR 970055718A
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South Korea
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correlator
clock
synchronization
correlators
synchronization tracking
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KR1019950047865A
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Korean (ko)
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KR0171008B1 (en
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전상영
김영일
이경준
이헌
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양승택
한국전자통신연구원
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Publication of KR970055718A publication Critical patent/KR970055718A/en
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    • 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
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • 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
    • H04B1/709—Correlator structure

Abstract

본 발명은 CDMA PCS에서 확산된 본래의 데이타를 역확산시키기 위하여 PN코드 동기를 1/2PN Chip이 이내로 정확히맞추기 위한 동기추적장치 및 그 방법에 관한 것으로 CDMA PCS에서 확산된 본래의 데이타를 역환산시키기 위하여 PN코드 동기를 1/2PN 칩 이내로 정확히 맞추기 위한 동기추적장치에 있어서 3개의 코렐레이터(Correlator)와; 상기 코렐레이터 내 PN코드 발생기의 위상변화를 결정하는 위상 전이기와; 상기 위상전이기의 출력신호에 따라 상기 코렐레이터내의 PN코드 발생기로 클럭을 공급하는 클럭 공급기와; 상기 코렐레이터 사이의 간격을 조정하는 클럭발생기로 구성되어 동기추적의 알고리즘이 간단하고 하드웨어의 복작함을 줄일 수 있어경제적인 뿐만 아니라 Correlator 사이의 간격을 임의로 조정함으로써 동기추적의 정화고를 쉽게 가변시킬 수 있는 유연성의 효과가 있다.The present invention relates to a synchronization tracking device and a method for accurately fitting a PN code synchronization within a 1/2 PN chip in order to despread the original data spread in the CDMA PCS. In the synchronization tracking device for accurately matching the PN code synchronization within the 1 / 2PN chip, three Correlator (Correlator); A phase shifter for determining a phase change of the PN code generator in the correlator; A clock supplier for supplying a clock to the PN code generator in the correlator according to the output signal of the phase shifter; It is composed of a clock generator that adjusts the interval between the correlator is simple and the synchronization tracking algorithm can reduce the complexity of hardware, economical as well as arbitrarily adjust the interval between the correlator can easily change the purge of the synchronization tracking It has the effect of flexibility.

Description

3개의 Correlator를 이용한 동기추적장치 및 그 방법Synchronization tracking device using 3 correlators and its method

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

제3도는 본 발명에 의한 동기추적장치의 블럭 구성도.3 is a block diagram of a synchronization tracking device according to the present invention.

제4도는 본 발명에 의한 동기추적장치의 Correlator의 PN코드에 따른 Correlation값이 도시된 도면.4 is a diagram showing a correlation value according to the PN code of the correlator of the synchronization tracking device according to the present invention.

제5도는 본 발명에 의한 동기추적 알고리즘.5 is a synchronization tracking algorithm according to the present invention.

제6도는 본 발명에 의한 동기추적장치의 실시예를 보여주는 도면.6 is a view showing an embodiment of a synchronization tracking device according to the present invention.

Claims (4)

CDMA PCS에서 확산된 본래의 데이타를 역확산시키기 위하여 PN코드 동기를 1/2PN 칩 이내로 정확히맞추기 위한 동기추적장치에 있어서 3개의 코렐레이터(Correlator)와; 상기 코렐레이터 내 PN코드 발생기의 위상변화를 결정하는 위상 전이기와; 상기 위상전이기의 출력신호에 따라 상기 코렐레이터내의 PN코드 발생기로 클럭을 공급하는 클럭 공급기와; 상기 코렐레이터 사이의 간격을 조정하는 클럭발생기를 포함하여 구성되어 있는 것을 특징으로 하는 3개의 Correlator를 이용한 동기추적장치.A correlator for synchronizing the PN code synchronization within a 1/2 PN chip to despread the original data spread in the CDMA PCS; A phase shifter for determining a phase change of the PN code generator in the correlator; A clock supplier for supplying a clock to the PN code generator in the correlator according to the output signal of the phase shifter; And a clock generator for adjusting the interval between the correlators. 3개의 각 Correlator가 입력되는 신호에 따라 Correlation값을 계산하는 제1단계와; 위상 전이기가 상기 제1단계의 계산된 각 Correlation값을 입력하여 클럭 위상을 어떻게 변화시킬 것인가를 결정하도록 소정 값과 비교하는 제2단계와; 클럭 공급기가 제2단계의 위상 전이기의 비교출력되는 값에 따라 클럭위상을 변화시켜 각 Correlator의 PN코드 발생기로 클럭을 출력함으로써 동기를 추적하는 제3단계를 포함하여 수행되는 있는 것을 특징으로 하는 3개의 Correlator를 이용한 동기추적방법.A first step of calculating a correlation value according to a signal input to each of three correlators; A second step of comparing a predetermined value with the phase shifter to determine how to change the clock phase by inputting each calculated Correlation value of the first step; And a third step of tracking the synchronization by changing the clock phase according to the comparison output value of the phase shifter of the second stage and outputting the clock to the PN code generator of each correlator. Synchronization tracking method using three correlators. 제2항에 있어서 상기 제3단계의 동기 추적단계에서 소정시간마다 Correlation값을 체크하여 3개의 Correlator해당되는 값을 출력하는 경우에는 정확히 동기가 맞은 것으로 간주하여 PN발생기를 구동시켜 코드를 역확산하고 그렇지 않은 경우에는 Correlator의 클럭을 소정간격만큼 이동시켜 동기를 추적할 수 있는 있는 것을 특징으로 하는 3개의 Correlator를 이용한 동기추적방법.According to claim 2, in the third step of the synchronization tracking step, if the Correlation value is checked at every predetermined time and three Correlator values are outputted, the PN generator is despread and the code is despread by considering the correct synchronization. Otherwise, the synchronization tracking method using the three correlators, characterized in that the synchronization can be tracked by moving the clock of the correlator by a predetermined interval. 제2항에 있어서 상기 제2단계의 동기추적 수행시 동기추적의 정확도를 가변시키기 위하여 클럭 발생기의 클럭 주파수를 가변할수 있는 있는 것을 특징으로 하는 3개의 Correlator를 이용한 동기추적방법.The synchronization tracking method using three correlators according to claim 2, wherein the clock frequency of the clock generator can be changed to change the accuracy of the synchronization tracking when the synchronization tracking is performed in the second step. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950047865A 1995-12-08 1995-12-08 Apparatus for tracking synchronization by three correlator KR0171008B1 (en)

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Application Number Priority Date Filing Date Title
KR1019950047865A KR0171008B1 (en) 1995-12-08 1995-12-08 Apparatus for tracking synchronization by three correlator

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KR970055718A true KR970055718A (en) 1997-07-31
KR0171008B1 KR0171008B1 (en) 1999-03-30

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KR100346224B1 (en) * 2000-09-27 2002-08-01 삼성전자 주식회사 Discriminator in pseudo noise code timing tracking loop

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