GB2389494A - Distortion pre-corrector for communication apparatus - Google Patents

Distortion pre-corrector for communication apparatus Download PDF

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Publication number
GB2389494A
GB2389494A GB0318255A GB0318255A GB2389494A GB 2389494 A GB2389494 A GB 2389494A GB 0318255 A GB0318255 A GB 0318255A GB 0318255 A GB0318255 A GB 0318255A GB 2389494 A GB2389494 A GB 2389494A
Authority
GB
United Kingdom
Prior art keywords
channel
distortion
corrector
stage group
group
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
GB0318255A
Other versions
GB0318255D0 (en
GB2389494B (en
Inventor
Brian Herbert Beech
David G Edwards
Ravin Perinpanayagam
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.)
Ericsson Television AS
Original Assignee
Tandberg Television AS
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 Tandberg Television AS filed Critical Tandberg Television AS
Publication of GB0318255D0 publication Critical patent/GB0318255D0/en
Publication of GB2389494A publication Critical patent/GB2389494A/en
Application granted granted Critical
Publication of GB2389494B publication Critical patent/GB2389494B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • 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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

A pre-corrector for producing non-linear distortion in a signal channel containing a root Nyquist bandpass filter (52, 57) in transmission and reception portions of the channel has plural cascaded groups of stages (78a, 70b). Each group has a series connection of a static pre-distorting section (48a, 48b) configured to represent an inverse function of magnitude and phase distortion estimated to occur in the channel, and a dynamic pre-distortion section (40a, 40b) including a forward model (42) configured to represent magnitude and phase distortion in the channel. Each successive stage group is connected to receive output from a preceding stage group so that distortion in the channel is successively reduced towards zero with each successive stage group.

Description

GB 2389494 A continuation (72) Inventor(s): Brian Herbert Beech David G
Edwards Ravin Perinpanayagam (74) Agent and/or Address for Service: Wildman Harrold Allen & Dixon 11th Floor Tower 3, Clements Inn, LON DON, WC2A 2AZ, U n ited Kingdom
GB0318255A 2001-03-13 2002-03-13 Distortion pre-corrector for communication apparatus Expired - Fee Related GB2389494B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0106160A GB0106160D0 (en) 2001-03-13 2001-03-13 Distortion pre-corrector for communication apparatus
PCT/GB2002/001153 WO2002073920A1 (en) 2001-03-13 2002-03-13 Distortion pre-corrector for communication apparatus

Publications (3)

Publication Number Publication Date
GB0318255D0 GB0318255D0 (en) 2003-09-10
GB2389494A true GB2389494A (en) 2003-12-10
GB2389494B GB2389494B (en) 2005-03-02

Family

ID=9910567

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0106160A Ceased GB0106160D0 (en) 2001-03-13 2001-03-13 Distortion pre-corrector for communication apparatus
GB0318255A Expired - Fee Related GB2389494B (en) 2001-03-13 2002-03-13 Distortion pre-corrector for communication apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0106160A Ceased GB0106160D0 (en) 2001-03-13 2001-03-13 Distortion pre-corrector for communication apparatus

Country Status (2)

Country Link
GB (2) GB0106160D0 (en)
WO (1) WO2002073920A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201302359D0 (en) 2013-02-11 2013-03-27 Newtec Cy Predistortion circuit and method for predistorting a signal
NL2012479B1 (en) 2014-03-19 2016-07-20 Newtec Cy Device and Method for Predistortion.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000025495A1 (en) * 1998-10-23 2000-05-04 Tandberg Television Asa Method and apparatus for reducing distortion of digital data

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000025495A1 (en) * 1998-10-23 2000-05-04 Tandberg Television Asa Method and apparatus for reducing distortion of digital data

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MAN-CHE KIM ET AL: COMPENATION OF NONLINEAR DISTORTION USING A PREDISTORTER BASED ON THE FIXED POINT APPROACH IN OFDN SYSTEMS, VEHICULAR TECHNOLOGY CONFERENCE 1998, 48TH IEEE OTTAWA, PAGES 2145-2149 *
WOLCOTT T J ET AL: "UPLINK-NOISE LIMITED SATELLITE CHANNELS" PROC. MILITARY COMMUNICATIONS CONFERENCE SAN DIEGO, 8, 1995, VOL. 1, PAGES 717-721 *

Also Published As

Publication number Publication date
GB0318255D0 (en) 2003-09-10
GB2389494B (en) 2005-03-02
WO2002073920A1 (en) 2002-09-19
GB0106160D0 (en) 2001-05-02

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20090416 AND 20090422

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160313