WO2004040406A3 - Estimating the operating point on a nonlinear traveling wave tube amplifier - Google Patents

Estimating the operating point on a nonlinear traveling wave tube amplifier

Info

Publication number
WO2004040406A3
WO2004040406A3 PCT/US2003/033130 US0333130W WO2004040406A3 WO 2004040406 A3 WO2004040406 A3 WO 2004040406A3 US 0333130 W US0333130 W US 0333130W WO 2004040406 A3 WO2004040406 A3 WO 2004040406A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
operating
point
non
input
twta
Prior art date
Application number
PCT/US2003/033130
Other languages
French (fr)
Other versions
WO2004040406A2 (en )
Inventor
Ernest C Chen
Shamik Maitra
Original Assignee
Directv Group Inc
Ernest C Chen
Shamik Maitra
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851Systems using a satellite or space-based relay
    • H04B7/18515Transmission equipment in satellites or space-based relays

Abstract

A method, apparatus, article of manufacture, and a memory structure provide the ability to determine an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA). The non-linearity of the TWTA is measured (1302). An input roots mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA is computed (1304). The RMS value identifies an input operating point of the measured non-linearity of the TWTA. Lastly, an output operating point is obtained (1306).
PCT/US2003/033130 2001-04-27 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier WO2004040406A3 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US09844401 US7209524B2 (en) 2001-04-27 2001-04-27 Layered modulation for digital signals
US10165710 US7778365B2 (en) 2001-04-27 2002-06-07 Satellite TWTA on-line non-linearity measurement
US42128902 true 2002-10-25 2002-10-25
US60/421,289 2002-10-25
US51036803 true 2003-10-10 2003-10-10
US60/510,368 2003-10-10

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CA 2503532 CA2503532C (en) 2002-10-25 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier
EP20030777694 EP1563601B1 (en) 2002-10-25 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier
US10532509 US7230480B2 (en) 2002-10-25 2003-10-17 Estimating the operating point on a non-linear traveling wave tube amplifier
DE2003631766 DE60331766D1 (en) 2002-10-25 2003-10-17 Estimate of the operating point of a non-linear propagation wave stir amplifier
US10962346 US7502430B2 (en) 2001-04-27 2004-10-08 Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US10961579 US7502429B2 (en) 2003-10-10 2004-10-08 Equalization for traveling wave tube amplifier nonlinearity measurements

Publications (2)

Publication Number Publication Date
WO2004040406A2 true WO2004040406A2 (en) 2004-05-13
WO2004040406A3 true true WO2004040406A3 (en) 2004-07-22

Family

ID=32719427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/033130 WO2004040406A3 (en) 2001-04-27 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier

Country Status (1)

Country Link
WO (1) WO2004040406A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002207A1 (en) * 2004-11-26 2006-06-01 Rohde & Schwarz Gmbh & Co. Kg Method and system for determining the amplitude and / or phase of the output signal of a transmission link in dependence of the amplitude of the input signal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6177836B1 (en) * 1999-05-07 2001-01-23 The Aerospace Corporation Feed forward linearized traveling wave tube
US6369648B1 (en) * 1999-04-21 2002-04-09 Hughes Electronics Corporation Linear traveling wave tube amplifier utilizing input drive limiter for optimization

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6369648B1 (en) * 1999-04-21 2002-04-09 Hughes Electronics Corporation Linear traveling wave tube amplifier utilizing input drive limiter for optimization
US6177836B1 (en) * 1999-05-07 2001-01-23 The Aerospace Corporation Feed forward linearized traveling wave tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1563601A4 *

Also Published As

Publication number Publication date Type
WO2004040406A2 (en) 2004-05-13 application

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