GB2432981B - Apparatus and method for amplitude variation reduction of a signal - Google Patents

Apparatus and method for amplitude variation reduction of a signal

Info

Publication number
GB2432981B
GB2432981B GB0524392A GB0524392A GB2432981B GB 2432981 B GB2432981 B GB 2432981B GB 0524392 A GB0524392 A GB 0524392A GB 0524392 A GB0524392 A GB 0524392A GB 2432981 B GB2432981 B GB 2432981B
Authority
GB
United Kingdom
Prior art keywords
signal
amplitude variation
variation reduction
reduction
amplitude
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.)
Active
Application number
GB0524392A
Other versions
GB2432981A (en
GB0524392D0 (en
Inventor
Robin Tingey
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
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority to GB0524392A priority Critical patent/GB2432981B/en
Publication of GB0524392D0 publication Critical patent/GB0524392D0/en
Priority to PCT/US2006/045473 priority patent/WO2007064611A2/en
Publication of GB2432981A publication Critical patent/GB2432981A/en
Application granted granted Critical
Publication of GB2432981B publication Critical patent/GB2432981B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/008—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general of digital or coded signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)
GB0524392A 2005-11-30 2005-11-30 Apparatus and method for amplitude variation reduction of a signal Active GB2432981B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0524392A GB2432981B (en) 2005-11-30 2005-11-30 Apparatus and method for amplitude variation reduction of a signal
PCT/US2006/045473 WO2007064611A2 (en) 2005-11-30 2006-11-28 Apparatus and method for amplitude variation reduction of a signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0524392A GB2432981B (en) 2005-11-30 2005-11-30 Apparatus and method for amplitude variation reduction of a signal

Publications (3)

Publication Number Publication Date
GB0524392D0 GB0524392D0 (en) 2006-01-04
GB2432981A GB2432981A (en) 2007-06-06
GB2432981B true GB2432981B (en) 2007-12-27

Family

ID=35601514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0524392A Active GB2432981B (en) 2005-11-30 2005-11-30 Apparatus and method for amplitude variation reduction of a signal

Country Status (2)

Country Link
GB (1) GB2432981B (en)
WO (1) WO2007064611A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5621762A (en) * 1995-06-12 1997-04-15 Motorola, Inc. Radio with peak power and bandwidth efficient modulation
GB2377141A (en) * 2001-06-29 2002-12-31 Nokia Corp WCDMA transmitter with an IQ vector magnitude limiter
US6819721B1 (en) * 1999-08-31 2004-11-16 Matsushita Electric Industrial Co., Ltd. Limiting method and limiter apparatus
US6879642B2 (en) * 2000-12-14 2005-04-12 Nokia Corporation Method of clipping signal amplitudes in a modulation system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870668A (en) * 1995-08-18 1999-02-09 Fujitsu Limited Amplifier having distortion compensation and base station for radio communication using the same
US5926052A (en) * 1996-07-01 1999-07-20 Motorola, Inc. Variable phase shifter and method
EP0822688A1 (en) * 1996-07-04 1998-02-04 Siemens Aktiengesellschaft Bus coupler with amplitude-controlled transmitter circuit
US7174356B2 (en) * 2003-06-24 2007-02-06 Motorola, Inc. Complex multiplication method and apparatus with phase rotation
US7453952B2 (en) * 2003-07-03 2008-11-18 Saed Aryan Predistortion circuit for a transmit system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5621762A (en) * 1995-06-12 1997-04-15 Motorola, Inc. Radio with peak power and bandwidth efficient modulation
US6819721B1 (en) * 1999-08-31 2004-11-16 Matsushita Electric Industrial Co., Ltd. Limiting method and limiter apparatus
US6879642B2 (en) * 2000-12-14 2005-04-12 Nokia Corporation Method of clipping signal amplitudes in a modulation system
GB2377141A (en) * 2001-06-29 2002-12-31 Nokia Corp WCDMA transmitter with an IQ vector magnitude limiter

Also Published As

Publication number Publication date
WO2007064611A2 (en) 2007-06-07
GB2432981A (en) 2007-06-06
WO2007064611A3 (en) 2007-12-06
GB0524392D0 (en) 2006-01-04

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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 20110127 AND 20110202

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

Free format text: REGISTERED BETWEEN 20170831 AND 20170906