KR950010334A - Carrier Recovery Circuit of Digital Reception System - Google Patents
Carrier Recovery Circuit of Digital Reception System Download PDFInfo
- Publication number
- KR950010334A KR950010334A KR1019930019514A KR930019514A KR950010334A KR 950010334 A KR950010334 A KR 950010334A KR 1019930019514 A KR1019930019514 A KR 1019930019514A KR 930019514 A KR930019514 A KR 930019514A KR 950010334 A KR950010334 A KR 950010334A
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- KR
- South Korea
- Prior art keywords
- output
- detector
- low pass
- carrier
- phase
- Prior art date
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- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
본 발명은 디지탈 수신 시스템의 반송파 복구 회로에 관한 것으로, 종래에는 수신 신호를 복구할 때 초기 주파수 동기에 대한 반송파의 주파수 및 위상을 정확히 추정할 수 없음으로 직교 진폭 변조된 수신 신호의 복조 시간이 지연되는 문제점이 있었다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier recovery circuit of a digital reception system. In the related art, when demodulating a received signal, the demodulation time of a quadrature amplitude modulated received signal is delayed because the frequency and phase of the carrier cannot be accurately estimated for initial frequency synchronization. There was a problem.
이러한 점을 감안하여 본 발명에서는 직교 진폭 변조된 신호를 수신할 때 초기에 반송파의 주파수 및 위상 차를 검출하여 원래의 신호를 추정함에 따라 반송파의 주파수 및 위상을 신속 정확하게 동기시키게 된다.In view of this point, when the quadrature amplitude modulated signal is received, the frequency and phase of the carrier are initially detected to estimate the original signal to quickly and accurately synchronize the frequency and phase of the carrier.
따라서, 본 발명을 적용하면 초기에 반송파를 원래의 신호로 복조시킴으로써 초기의 동기 지연 시간을 줄일 수 있다.Therefore, by applying the present invention, the initial synchronization delay time can be reduced by demodulating the carrier with the original signal initially.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명의 반송파 복구 회로 블럭도,1 is a block diagram of a carrier recovery circuit of the present invention;
제2도는 16레벨 직교 변조 신호의 레벨 좌표를 보인 상태도.2 is a state diagram showing level coordinates of a 16-level orthogonal modulation signal.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930019514A KR100279585B1 (en) | 1993-09-23 | 1993-09-23 | Carrier Recovery Circuit of Digital Receiving System |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930019514A KR100279585B1 (en) | 1993-09-23 | 1993-09-23 | Carrier Recovery Circuit of Digital Receiving System |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950010334A true KR950010334A (en) | 1995-04-28 |
KR100279585B1 KR100279585B1 (en) | 2001-02-01 |
Family
ID=66823987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930019514A KR100279585B1 (en) | 1993-09-23 | 1993-09-23 | Carrier Recovery Circuit of Digital Receiving System |
Country Status (1)
Country | Link |
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KR (1) | KR100279585B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100245330B1 (en) * | 1997-06-26 | 2000-02-15 | 전주범 | Phase and frequency detector of digital communication system |
KR100266629B1 (en) * | 1997-09-26 | 2000-09-15 | 김영환 | Stream encipher and decipher apparatus |
-
1993
- 1993-09-23 KR KR1019930019514A patent/KR100279585B1/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100245330B1 (en) * | 1997-06-26 | 2000-02-15 | 전주범 | Phase and frequency detector of digital communication system |
KR100266629B1 (en) * | 1997-09-26 | 2000-09-15 | 김영환 | Stream encipher and decipher apparatus |
Also Published As
Publication number | Publication date |
---|---|
KR100279585B1 (en) | 2001-02-01 |
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