IT1264347B1 - Apparato di controllo automatico di guadagno per ricevitore a radiofrequenza incorporante circuiteria di equalizzazione nel dominio - Google Patents
Apparato di controllo automatico di guadagno per ricevitore a radiofrequenza incorporante circuiteria di equalizzazione nel dominioInfo
- Publication number
- IT1264347B1 IT1264347B1 IT93MI000380A ITMI930380A IT1264347B1 IT 1264347 B1 IT1264347 B1 IT 1264347B1 IT 93MI000380 A IT93MI000380 A IT 93MI000380A IT MI930380 A ITMI930380 A IT MI930380A IT 1264347 B1 IT1264347 B1 IT 1264347B1
- Authority
- IT
- Italy
- Prior art keywords
- gain control
- automatic gain
- domain
- circuitery
- control apparatus
- Prior art date
Links
- 238000001914 filtration Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
- H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/001—Digital control of analog signals
-
- 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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/30—Circuits for homodyne or synchrodyne receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/08—Amplitude regulation arrangements
-
- 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)
- Control Of Amplification And Gain Control (AREA)
- Circuits Of Receivers In General (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Segnali di retroazione per l'uso nel controllare una porzione amplificatore a guadagno variabile di un radioricevitore vengono ottenuti da esistenti segnali di controllo automatico di guadagno comprendenti una parte di una sezione equalizzatore nel dominio del tempo di un ricevitore tale che filtraggio passa banda e circuiteria di demodulazione del segnale di retroazione, unitamente ad un apparato di linearizzazione della circuiteria del demodulatore richiesto negli schemi di retroazione della tecnica anteriore, possono essere eliminati dallo schema complessivo. L'apparato che ne risulta fornisce un livello costante all'ingresso del convertitore analogico-digitale incorporato e l'anello risultante si adatta alle cangianti larghezze di banda RF/banda base.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/846,496 US5509030A (en) | 1992-03-04 | 1992-03-04 | RF receiver AGC incorporating time domain equalizer circuity |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI930380A0 ITMI930380A0 (it) | 1993-02-26 |
ITMI930380A1 ITMI930380A1 (it) | 1994-08-26 |
IT1264347B1 true IT1264347B1 (it) | 1996-09-23 |
Family
ID=25298108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT93MI000380A IT1264347B1 (it) | 1992-03-04 | 1993-02-26 | Apparato di controllo automatico di guadagno per ricevitore a radiofrequenza incorporante circuiteria di equalizzazione nel dominio |
Country Status (7)
Country | Link |
---|---|
US (1) | US5509030A (it) |
JP (1) | JPH0613823A (it) |
CA (1) | CA2082998C (it) |
DE (1) | DE4306551A1 (it) |
ES (1) | ES2056743B1 (it) |
GB (1) | GB2264829A (it) |
IT (1) | IT1264347B1 (it) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6104442A (en) * | 1994-06-28 | 2000-08-15 | Samsung Electronics Co., Ltd. | Radio receiver for receiving both VSB and QAM digital HDTV signals |
US20040213358A1 (en) * | 1994-05-23 | 2004-10-28 | Samsung Electronics Co., Ltd. | Radio receiver for receiving both VSB and QAM digital HDTV signals |
US5565932A (en) * | 1994-11-08 | 1996-10-15 | Zenith Electronics Corp. | AGC system with pilot using digital data reference |
US5722063A (en) * | 1994-12-16 | 1998-02-24 | Qualcomm Incorporated | Method and apparatus for increasing receiver immunity to interference |
JP3130794B2 (ja) * | 1996-05-27 | 2001-01-31 | 日本電気株式会社 | 復調器 |
KR100193848B1 (ko) * | 1996-10-05 | 1999-06-15 | 윤종용 | 대역확산통신기에 있어서 수신신호 이득 자동제어장치 및 방법 |
JP3024755B2 (ja) * | 1998-06-24 | 2000-03-21 | 日本電気株式会社 | Agc回路及びその制御方法 |
JP3214463B2 (ja) * | 1998-10-21 | 2001-10-02 | 日本電気株式会社 | 無線通信装置 |
US6229998B1 (en) | 1999-04-12 | 2001-05-08 | Qualcomm Inc. | Method and system for detecting in-band jammers in a spread spectrum wireless base station |
AU2002237226A1 (en) * | 2000-12-20 | 2002-07-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for classifying interference |
DE10141597B4 (de) * | 2001-08-24 | 2017-11-09 | Lantiq Deutschland Gmbh | Verfahren zum Rekonstruieren von über eine Übertragungsstrecke übertragenen Daten in einem Empfänger und entsprechende Vorrichtung |
US8027657B2 (en) * | 2001-10-26 | 2011-09-27 | Texas Instruments Incorporated | Sampling mixer with asynchronous clock and signal domains |
US20040002312A1 (en) * | 2002-06-27 | 2004-01-01 | Liang Li | Baseband receiver and method of using same |
US7660344B2 (en) * | 2002-06-28 | 2010-02-09 | Bwa Technology, Inc. | AGC fine-tuning by the adaptive time domain equalizer |
US6768441B2 (en) | 2002-08-20 | 2004-07-27 | Telefonaktiebolaget L.M. Ericsson | Methods of receiving communications signals including a plurality of digital filters having different bandwidths and related receivers |
JP2007195075A (ja) * | 2006-01-20 | 2007-08-02 | Fujitsu Ltd | 復調回路および復調方法 |
KR102494784B1 (ko) | 2015-07-28 | 2023-02-01 | 삼성전자주식회사 | 수신기 및 그 동작 방법 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0213224B1 (en) * | 1985-08-28 | 1990-04-11 | International Business Machines Corporation | Method for rapid gain acquisition in a modem receiver |
US4665519A (en) * | 1985-11-04 | 1987-05-12 | Electronic Systems Technology, Inc. | Wireless computer modem |
DK163699C (da) * | 1986-02-11 | 1992-08-17 | Poul Richter Joergensen | Fremgangsmaade til automatisk forstaerkningsstyring af et signal samt et kredsloeb til udoevelse af fremgangsmaaden |
KR950009559B1 (ko) * | 1990-04-27 | 1995-08-24 | 모토로라 인코포레이티드 | 디지탈 자동 이득 제어 방법 및 그 장치 |
AU632707B2 (en) * | 1990-08-24 | 1993-01-07 | Motorola, Inc. | Dual mode automatic gain control |
US5083304A (en) * | 1990-09-28 | 1992-01-21 | Motorola, Inc. | Automatic gain control apparatus and method |
US5142695A (en) * | 1991-03-21 | 1992-08-25 | Novatel Communications, Ltd. | Cellular radio-telephone receiver employing improved technique for generating an indication of received signal strength |
JP2730347B2 (ja) * | 1991-10-09 | 1998-03-25 | 松下電器産業株式会社 | 受信機の自動利得制御方法 |
-
1992
- 1992-03-04 US US07/846,496 patent/US5509030A/en not_active Expired - Lifetime
- 1992-11-16 CA CA002082998A patent/CA2082998C/en not_active Expired - Fee Related
-
1993
- 1993-02-26 IT IT93MI000380A patent/IT1264347B1/it active IP Right Grant
- 1993-03-01 GB GB9304123A patent/GB2264829A/en not_active Withdrawn
- 1993-03-03 DE DE4306551A patent/DE4306551A1/de not_active Withdrawn
- 1993-03-04 ES ES09300446A patent/ES2056743B1/es not_active Expired - Fee Related
- 1993-03-04 JP JP5044158A patent/JPH0613823A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ES2056743B1 (es) | 1997-07-01 |
ES2056743A2 (es) | 1994-10-01 |
US5509030A (en) | 1996-04-16 |
CA2082998A1 (en) | 1993-09-05 |
GB9304123D0 (en) | 1993-04-14 |
GB2264829A (en) | 1993-09-08 |
DE4306551A1 (it) | 1993-09-09 |
ITMI930380A1 (it) | 1994-08-26 |
JPH0613823A (ja) | 1994-01-21 |
ITMI930380A0 (it) | 1993-02-26 |
ES2056743R (it) | 1996-11-16 |
CA2082998C (en) | 2000-05-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19990129 |