AU2002214448A1 - A transmitter - Google Patents
A transmitterInfo
- Publication number
- AU2002214448A1 AU2002214448A1 AU2002214448A AU1444802A AU2002214448A1 AU 2002214448 A1 AU2002214448 A1 AU 2002214448A1 AU 2002214448 A AU2002214448 A AU 2002214448A AU 1444802 A AU1444802 A AU 1444802A AU 2002214448 A1 AU2002214448 A1 AU 2002214448A1
- Authority
- AU
- Australia
- Prior art keywords
- signal
- conversion
- frequency
- transmission signal
- transmitter
- 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.)
- Abandoned
Links
- 238000006243 chemical reaction Methods 0.000 abstract 8
- 230000005540 biological transmission Effects 0.000 abstract 6
- 230000006978 adaptation Effects 0.000 abstract 1
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
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0433—Circuits with power amplifiers with linearisation using feedback
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Pens And Brushes (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A transmitter comprises a device ( 20 ) for frequency up-conversion of a communication signal having at least two consecutive frequency conversion stages, a power amplifier ( 27 ) for amplifying the output signal therefrom for obtaining a transmission signal and means ( 29 ) for extracting the transmission signal. It also has a device for frequency down-conversion of said extracted transmission signal to the same frequency as the communication signal before said up-conversion for creating a feedback signal. Said two devices use the same local oscillators ( 25, 26 ). The transmitter also has means for signal parameter adaptation of the communication signal on basis of the feedback signal for obtaining a desired character of the transmission signal. The frequency down-conversion device comprises a local oscillator combiner ( 30 ) producing a combined frequency signal used for frequency down-conversion of the transmission signal reducing the number of conversion stages in the path of the extracted transmission signal with respect to the corresponding number of the frequency up-conversion device.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0004330A SE519258C2 (en) | 2000-11-24 | 2000-11-24 | Transmitter |
SE0004330 | 2000-11-24 | ||
PCT/SE2001/002440 WO2002043260A1 (en) | 2000-11-24 | 2001-11-07 | A transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2002214448A1 true AU2002214448A1 (en) | 2002-06-03 |
Family
ID=20281966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2002214448A Abandoned AU2002214448A1 (en) | 2000-11-24 | 2001-11-07 | A transmitter |
Country Status (7)
Country | Link |
---|---|
US (1) | US7065330B2 (en) |
EP (1) | EP1336252B1 (en) |
AT (1) | ATE367683T1 (en) |
AU (1) | AU2002214448A1 (en) |
DE (1) | DE60129457D1 (en) |
SE (1) | SE519258C2 (en) |
WO (1) | WO2002043260A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050143025A1 (en) * | 2002-06-19 | 2005-06-30 | Masayoshi Suzuki | Transmitting apparatus |
JP4323968B2 (en) * | 2004-01-14 | 2009-09-02 | 株式会社日立コミュニケーションテクノロジー | Timing adjustment method for wireless communication device |
US8085868B2 (en) * | 2004-11-03 | 2011-12-27 | Freescale Semiconductor, Inc. | Phase modulating and combining circuit |
FI20055632A0 (en) * | 2005-11-30 | 2005-11-30 | Nokia Corp | Attenuation of a local oscillator leak in a radio transmitter |
WO2008146090A1 (en) * | 2007-05-25 | 2008-12-04 | Freescale Semiconductor, Inc. | Wireless communication unit, baseband module, radio frequency module, wireless terminal and computer program product |
US7576665B2 (en) * | 2007-11-27 | 2009-08-18 | Amx Llc | System and method for receiving analog and digital input |
US8094748B2 (en) * | 2008-07-14 | 2012-01-10 | Motorola Mobility, Inc. | Transceiver architecture with combined smart antenna calibration and digital predistortion |
US8499328B2 (en) * | 2010-02-02 | 2013-07-30 | Vecima Networks Inc. | Agile distortion and noise cancellation across multiple channels and ports in a CATV upconverter/modulator |
US8837620B2 (en) * | 2011-05-03 | 2014-09-16 | Optis Cellular Technology, Llc | Adaptive multi-channel transmitter linearization system using a shared feedback receiver |
CN105721036B (en) * | 2016-02-03 | 2019-04-16 | 北京邮电大学 | A kind of MIMO frequency conversion system |
TWI610566B (en) * | 2016-07-22 | 2018-01-01 | 晨星半導體股份有限公司 | Audio/video signal processing circuit and associated signal processing method |
CN112953868B (en) * | 2019-12-10 | 2022-09-09 | 珠海全志科技股份有限公司 | Predistortion method, apparatus, computer device and readable storage medium |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4700151A (en) | 1985-03-20 | 1987-10-13 | Nec Corporation | Modulation system capable of improving a transmission system |
GB9320078D0 (en) * | 1993-09-29 | 1993-11-17 | Linear Modulation Tech | Cartesian amplifier power control and related applications |
JPH08316756A (en) * | 1995-05-22 | 1996-11-29 | Saitama Nippon Denki Kk | Transmission output control system |
US5732333A (en) * | 1996-02-14 | 1998-03-24 | Glenayre Electronics, Inc. | Linear transmitter using predistortion |
US5937011A (en) | 1996-03-26 | 1999-08-10 | Airnet Communications Corp. | Multi-carrier high power amplifier using digital pre-distortion |
US5974302A (en) | 1997-03-24 | 1999-10-26 | Lucent Technologies Inc. | Dual band cellular/PCS transceiver |
US6072364A (en) | 1997-06-17 | 2000-06-06 | Amplix | Adaptive digital predistortion for power amplifiers with real time modeling of memoryless complex gains |
US6029052A (en) | 1997-07-01 | 2000-02-22 | Telefonaktiebolaget Lm Ericsson | Multiple-mode direct conversion receiver |
GB9811381D0 (en) * | 1998-05-27 | 1998-07-22 | Nokia Mobile Phones Ltd | Predistortion control for power reduction |
JP2000138602A (en) | 1998-10-30 | 2000-05-16 | Hewlett Packard Japan Ltd | Up-down converter |
KR100398664B1 (en) * | 2001-02-21 | 2003-09-19 | 주식회사 쏠리테크 | Device for Linearizing Power Amplifier with Predistortion in IF Band |
-
2000
- 2000-11-24 SE SE0004330A patent/SE519258C2/en not_active IP Right Cessation
-
2001
- 2001-11-07 AT AT01982991T patent/ATE367683T1/en not_active IP Right Cessation
- 2001-11-07 WO PCT/SE2001/002440 patent/WO2002043260A1/en active IP Right Grant
- 2001-11-07 AU AU2002214448A patent/AU2002214448A1/en not_active Abandoned
- 2001-11-07 DE DE60129457T patent/DE60129457D1/en not_active Expired - Lifetime
- 2001-11-07 EP EP01982991A patent/EP1336252B1/en not_active Expired - Lifetime
- 2001-11-07 US US10/432,549 patent/US7065330B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1336252B1 (en) | 2007-07-18 |
DE60129457D1 (en) | 2007-08-30 |
WO2002043260A1 (en) | 2002-05-30 |
US20040029542A1 (en) | 2004-02-12 |
SE0004330L (en) | 2002-05-25 |
SE0004330D0 (en) | 2000-11-24 |
SE519258C2 (en) | 2003-02-04 |
US7065330B2 (en) | 2006-06-20 |
ATE367683T1 (en) | 2007-08-15 |
EP1336252A1 (en) | 2003-08-20 |
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