CA2062776A1 - Digital automatic gain control - Google Patents

Digital automatic gain control

Info

Publication number
CA2062776A1
CA2062776A1 CA2062776A CA2062776A CA2062776A1 CA 2062776 A1 CA2062776 A1 CA 2062776A1 CA 2062776 A CA2062776 A CA 2062776A CA 2062776 A CA2062776 A CA 2062776A CA 2062776 A1 CA2062776 A1 CA 2062776A1
Authority
CA
Canada
Prior art keywords
gain control
automatic gain
signal
digital automatic
receiver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2062776A
Other languages
French (fr)
Other versions
CA2062776C (en
Inventor
John William Arens
David Edward Borth
James Frank Michael Kepler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2062776A1 publication Critical patent/CA2062776A1/en
Application granted granted Critical
Publication of CA2062776C publication Critical patent/CA2062776C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H03G3/3078—Circuits generating control signals for digitally modulated 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
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits

Abstract

There is provided a mechanism for Automatic Gain Control in a receiver. It comprises: determining, within a certain dy-namic range, the difference in power between the desired signal and a signal received, and providing open loop gain control for the signal in response to the differential so determined, scaled by the receiver's gain characteristics, such that the signal is posi-tioned within dynamic range so as to reduce saturation and noise.
CA002062776A 1990-04-27 1991-04-09 Digital automatic gain control Expired - Fee Related CA2062776C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51590090A 1990-04-27 1990-04-27
US515,900 1990-04-27

Publications (2)

Publication Number Publication Date
CA2062776A1 true CA2062776A1 (en) 1991-10-28
CA2062776C CA2062776C (en) 1996-06-04

Family

ID=24053240

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002062776A Expired - Fee Related CA2062776C (en) 1990-04-27 1991-04-09 Digital automatic gain control

Country Status (8)

Country Link
EP (1) EP0484476A4 (en)
JP (1) JP2586214B2 (en)
KR (1) KR950009559B1 (en)
AU (1) AU635134B2 (en)
BR (1) BR9105733A (en)
CA (1) CA2062776C (en)
FI (1) FI107089B (en)
WO (1) WO1991017606A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5509030A (en) * 1992-03-04 1996-04-16 Alcatel Network Systems, Inc. RF receiver AGC incorporating time domain equalizer circuity
JPH05327378A (en) * 1992-05-22 1993-12-10 Toshiba Corp Automatic gain control circuit for radio communication equipment
DE4332161A1 (en) * 1993-09-22 1995-03-23 Thomson Brandt Gmbh Radio frequency receiver
EP0721715B1 (en) * 1993-09-30 2001-11-28 Conexant Systems, Inc. Multiple antenna home base for digital cordless telephones
JP3274055B2 (en) * 1996-01-29 2002-04-15 沖電気工業株式会社 Receiver saturation prevention circuit based on spread spectrum method.
EP0859462A4 (en) * 1996-09-05 1999-11-24 Mitsubishi Electric Corp Gain controlling method and receiver
KR100595839B1 (en) * 1999-10-04 2006-07-05 에스케이 텔레콤주식회사 Apparatus and method for compensating rf module gain using measured rf module noise
SG93224A1 (en) * 2000-02-02 2002-12-17 Koninkl Philips Electronics Nv Measuring antenna signal strength with automatic gain control receiver
DK1458117T3 (en) * 2000-10-19 2006-10-30 Interdigital Tech Corp TDD receives with selectively activated AGC signal measuring unit
US7085255B2 (en) * 2000-10-19 2006-08-01 Interdigital Technology Corporation Selectively activated AGC signal measurement unit
GB2400272B (en) * 2003-04-04 2006-08-02 Ubinetics Ltd Method of controlling the transmit power of a mobile communications device
DE10343835B4 (en) * 2003-09-22 2005-07-28 Infineon Technologies Ag Amplitude compression of signals in a multicarrier system
US7817731B2 (en) 2003-09-22 2010-10-19 Infineon Technologies Ag Amplitude compression of signals in a multicarrier system
JP5407596B2 (en) * 2009-06-30 2014-02-05 株式会社リコー Wireless communication apparatus and signal strength measuring method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227256A (en) 1978-01-06 1980-10-07 Quadracast Systems, Inc. AM Broadcast tuner with automatic gain control
JPS5544225A (en) * 1978-09-25 1980-03-28 Nec Corp Time sharing gain adjustment circuit
US4191995A (en) * 1979-01-02 1980-03-04 Bell Telephone Laboratories, Incorporated Digital automatic gain control circuit
JPS5752741A (en) * 1980-09-12 1982-03-29 Toshiba Corp Liquid heating apparatus
FR2520952A1 (en) 1982-02-03 1983-08-05 Trt Telecom Radio Electr AUTOMATIC GAIN CONTROL DEVICE (AGC) WITH QUICK ACTION
JPS6027234A (en) * 1983-07-22 1985-02-12 Nec Corp Receiver
FR2576472B1 (en) * 1985-01-22 1988-02-12 Alcatel Thomson Faisceaux METHOD AND DEVICE FOR AUTOMATICALLY GAIN CONTROL OF A TIME-DIVISION MULTIPLE ACCESS RECEIVER
DK163699C (en) * 1986-02-11 1992-08-17 Poul Richter Joergensen PROCEDURE FOR AUTOMATIC AMPLIFIER CONTROL OF A SIGNAL AND A CIRCUIT FOR EXERCISING THE PROCEDURE
US4696027A (en) 1986-08-01 1987-09-22 Motorola, Inc. Handoff apparatus and method with interference reduction for a radio system
IE64560B1 (en) * 1988-11-30 1995-08-23 Motorola Inc Digital automatic gain control

Also Published As

Publication number Publication date
FI916141A0 (en) 1991-12-27
JPH04507182A (en) 1992-12-10
CA2062776C (en) 1996-06-04
AU7689591A (en) 1991-11-27
FI107089B (en) 2001-05-31
AU635134B2 (en) 1993-03-11
BR9105733A (en) 1992-05-19
KR920702803A (en) 1992-10-06
JP2586214B2 (en) 1997-02-26
KR950009559B1 (en) 1995-08-24
EP0484476A4 (en) 1993-02-24
EP0484476A1 (en) 1992-05-13
WO1991017606A1 (en) 1991-11-14

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed