KR970055706A - High speed operation PN code initial synchronization acquisition device for CDMA - Google Patents

High speed operation PN code initial synchronization acquisition device for CDMA Download PDF

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Publication number
KR970055706A
KR970055706A KR1019950052647A KR19950052647A KR970055706A KR 970055706 A KR970055706 A KR 970055706A KR 1019950052647 A KR1019950052647 A KR 1019950052647A KR 19950052647 A KR19950052647 A KR 19950052647A KR 970055706 A KR970055706 A KR 970055706A
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KR
South Korea
Prior art keywords
cdma
memory
processor
acquisition device
signal
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Application number
KR1019950052647A
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Korean (ko)
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KR0150278B1 (en
Inventor
김영일
전상영
송일현
이경준
이헌
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양승택
한국전자통신연구원
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Priority to KR1019950052647A priority Critical patent/KR0150278B1/en
Publication of KR970055706A publication Critical patent/KR970055706A/en
Application granted granted Critical
Publication of KR0150278B1 publication Critical patent/KR0150278B1/en

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Classifications

    • 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
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70754—Setting of search window, i.e. range of code offsets to be searched
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker

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

Abstract

본 발명은 CDMA방식의 기지국에서 초기동기를 획득하는 장치(Searcher)의 구성에 관한 것으로, 미리 PN 코드를 발생시켜 메모리에 저장시킨 후, 오프셋(상관관계을 구하기 위해 처음 시작되는 PN 메모리의 출력번지)을 순차적으로 바꿔가며 수신데이타와의 상관관계를 구한후, 최종적으로 가장 큰 상관관계값을 갖는 PN 메모리 시작번지를 PN 오프셋값으로 취하는 방식의 CDMA용 고속 동작 PN 코드 초기동기 획득장치를 제공하여 제4도에서 보는 바와 같이 Data Memory의 데이타를 일정하게 유지하고 PN 메모리의 오프셋값을 변화시키면서 Correlation값을 구하는 것이다.The present invention relates to a configuration of a device (Searcher) for acquiring the initial synchronization in the base station of the CDMA method, and after generating the PN code in advance and storing it in the memory, the offset (output address of the PN memory first started to find the correlation) To obtain a fast operation PN code initial synchronization acquisition device for CDMA, which obtains the PN memory start address having the largest correlation value as the PN offset value after obtaining the correlation with the received data by sequentially changing the As shown in Fig. 4, the data in the data memory is kept constant and the correlation value is obtained by changing the offset value of the PN memory.

Description

CDMA용 고속 동작 PN 코드 초기 동기 획득 장치High speed operation PN code initial synchronization acquisition device for CDMA

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

제3도는 본 발명에 따른 동작 타이밍도.3 is an operation timing diagram according to the present invention.

Claims (1)

CDMA방식의 이동국 및 기지국에서 파일럿신호의 동기를 획득하기 위한 장치에 있어서, 동기획득 장치의 전반적인 제어를 수행하며, 다른 블럭들을 메모리 맵 입출력장치(Memory Mapped I/O)로 간주하여 제어하는 프로세서부(U01)와; 안테나에서 수신한 신호를 기저대역으로 천이시킨 후 칩클럭의 n배로 오버샘플링(Oversampling)으로 A/D변환하여 출력시키는 수신모듈(U06)와; 상기 프로세서(U01)의 명령에 따라 각 모듈에서 필요로 하는 제어신호를 발생시키는 제어신호 발생부(U03)와; CDMA방식에서 필요한 PN 시퀸스(Sequence)를 발생시키는 PN 발생기(U04)와; PN 발생기에서 발생시킨 PN 열을 저장시키는 PN 메모리(U05)와; 상기 수신모듈(U06)로 부터 분배되어 입력되는 A/D변환된 수신신호(Inphase신호와 Quadrature신호)들을 저장하는 DATA 메모리(U07)와; PN 열과 수신된 I,Q데이타를 곱해서 누적시키는 기능을 수행하는 논리연산 블럭(U08)과; 여러 ALU에서 계산한 Correlation값을 차례대로 저장한후, 필요시 프로세서(U1)에 인터럽트 신호를 발생시켜 프로세서가 DPRAM의 내용을 읽어 갈 수 있도록 하는 DPRAM(U09)를 포함하는 것을 특징으로 하는 CDMA용 고속 동작 PN 코드 초기 동기 획득 장치.A device for acquiring synchronization of pilot signals in a CDMA mobile station and a base station, the processor performing overall control of the synchronization acquisition device and controlling other blocks as memory mapped I / O. (U01); A receiving module (U06) for converting the signal received from the antenna to the baseband and then performing A / D conversion on oversampling with n times the chip clock to output the result; A control signal generator (U03) for generating a control signal required by each module according to the command of the processor (U01); A PN generator U04 for generating a PN sequence required in the CDMA scheme; A PN memory U05 for storing the PN string generated by the PN generator; A data memory (U07) for storing A / D-converted received signals (Inphase signal and Quadrature signal) distributed and input from the receiving module (U06); A logic operation block U08 for performing a function of multiplying the PN sequence by the received I and Q data and accumulating the PN sequence; High speed for CDMA, including DPRAM (U09) which stores the Correlation values calculated by several ALUs in order and generates an interrupt signal to the processor (U1) if necessary to allow the processor to read the contents of the DPRAM. Operation PN code initial synchronization acquisition device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950052647A 1995-12-20 1995-12-20 Apparatus for accomplishing fast pn code synchronization in cdma KR0150278B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950052647A KR0150278B1 (en) 1995-12-20 1995-12-20 Apparatus for accomplishing fast pn code synchronization in cdma

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950052647A KR0150278B1 (en) 1995-12-20 1995-12-20 Apparatus for accomplishing fast pn code synchronization in cdma

Publications (2)

Publication Number Publication Date
KR970055706A true KR970055706A (en) 1997-07-31
KR0150278B1 KR0150278B1 (en) 1998-11-02

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KR1019950052647A KR0150278B1 (en) 1995-12-20 1995-12-20 Apparatus for accomplishing fast pn code synchronization in cdma

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010028099A (en) * 1999-09-17 2001-04-06 박종섭 Method and apparatus for tracking synchronization in a reciever using CDMA

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010028099A (en) * 1999-09-17 2001-04-06 박종섭 Method and apparatus for tracking synchronization in a reciever using CDMA

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Publication number Publication date
KR0150278B1 (en) 1998-11-02

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