KR20000040740A - Gain control signal generating device of multi level demodulator - Google Patents
Gain control signal generating device of multi level demodulator Download PDFInfo
- Publication number
- KR20000040740A KR20000040740A KR1019980056459A KR19980056459A KR20000040740A KR 20000040740 A KR20000040740 A KR 20000040740A KR 1019980056459 A KR1019980056459 A KR 1019980056459A KR 19980056459 A KR19980056459 A KR 19980056459A KR 20000040740 A KR20000040740 A KR 20000040740A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- gain control
- multi level
- generating device
- signal generating
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
- H04L25/4923—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using ternary codes
- H04L25/4925—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using ternary codes using balanced bipolar ternary codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3809—Amplitude regulation arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Control Of Amplification And Gain Control (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980056459A KR100311383B1 (ko) | 1998-12-19 | 1998-12-19 | 멀티레벨복조기의이득제어신호발생장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980056459A KR100311383B1 (ko) | 1998-12-19 | 1998-12-19 | 멀티레벨복조기의이득제어신호발생장치 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20000040740A true KR20000040740A (en) | 2000-07-05 |
KR100311383B1 KR100311383B1 (ko) | 2001-11-15 |
Family
ID=19563973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019980056459A KR100311383B1 (ko) | 1998-12-19 | 1998-12-19 | 멀티레벨복조기의이득제어신호발생장치 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100311383B1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100382653B1 (ko) * | 2001-03-28 | 2003-05-09 | 삼성전자주식회사 | 원하는 신호를 기준으로 동작하는 agc 시스템 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4814719A (en) * | 1987-12-14 | 1989-03-21 | Ford Aerospace & Communications Corporation | Unsymmetrical QPSK demodulator |
JPH0377457A (ja) * | 1989-08-18 | 1991-04-03 | Mitsubishi Electric Corp | 復調装置 |
-
1998
- 1998-12-19 KR KR1019980056459A patent/KR100311383B1/ko not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100382653B1 (ko) * | 2001-03-28 | 2003-05-09 | 삼성전자주식회사 | 원하는 신호를 기준으로 동작하는 agc 시스템 |
Also Published As
Publication number | Publication date |
---|---|
KR100311383B1 (ko) | 2001-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR920001870A (ko) | 변조 캐리어 신호 수신용 전자 수신기 | |
RU95122672A (ru) | Способ автоматической регулировки усиления и исключения смещения постоянной составляющей в приемнике с квадратурной демодуляцией и устройство для его осуществления | |
CA2296312A1 (en) | Frequency synthesizer systems and methods for three-point modulation with a dc response | |
RU94033150A (ru) | Устройство для компенсации вращения фазы в оконечной ступени усилителя | |
HU9402492D0 (en) | Psk demodulator | |
ATE416522T1 (de) | Erzeugung von einem phasenverriegelten schleifesignal mit reduzierten störemissionen | |
CA2198337A1 (en) | Frequency spreading clock modulation | |
GB1105337A (en) | Improvements in or relating to single side band modulation systems | |
EP0580269A3 (ko) | ||
KR20000040740A (en) | Gain control signal generating device of multi level demodulator | |
CA2080786A1 (en) | Vector fm modulator | |
KR900008789A (ko) | 직접 혼합동기 am 수신기 | |
CA2052589A1 (en) | Rate conversion apparatus | |
ES2060536A1 (es) | Sintetizador de frecuencias. | |
EP0325459A3 (en) | Digital modulator | |
CA2314879A1 (en) | Digital demodulator | |
GB1217746A (en) | Improvements in or relating to demodulators | |
EP0445664A3 (de) | Schaltungsanordnung zum Detektieren von Kennschwingungen | |
JPS5662407A (en) | Phase modulating circuit | |
JPS57185741A (en) | Monitoring device for phase modulator | |
JPS57140057A (en) | Demodulating system for phase displacement modulation signal | |
JPH0424669Y2 (ko) | ||
ATE91830T1 (de) | Frequenzmodulationsverfahren sowie anordnung. | |
JPS57136810A (en) | Frequency modulating system using pll | |
KR920015715A (ko) | 디지탈 통신시스템의 fsk 변조회로 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20050607 Year of fee payment: 5 |
|
LAPS | Lapse due to unpaid annual fee |