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公开(公告)号：JP2000092412A
公开(公告)日：2000-03-31
申请号：JP23319899
申请日：1999-08-19
Applicant: HARRIS CORP
Inventor： KORTE THEODORE , MALEC JEFFREY , ZHIQUN HU , ABASCAL CARLOS , KELLER JAMES
Abstract: PROBLEM TO BE SOLVED: To avoid the shutdown of a transmitter, even if a device gets out of order in the RF power amplifier control system for amplification control over an RF signal. SOLUTION: This RF power amplifier control system is equipped with groups of power amplifier modules which amplify the RF signal. The respective groups are equipped with a 1st and a 2nd group controller, which control operation including ON/OFF operation of the power amplifier modules in the groups. The 1st group controller controls amplifying operation, and only when this 1st group controller is turned off, is the 2nd group controller turned on. This system is provided with a 1st and a 2nd central controller which totally controls those 1st and 2nd group controllers. The 1st central controller performs control operation, and the 2nd central controller monitors the operation of the 1st controller and performs control operation, when the 1st central controller becomes functionally disabled.
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公开(公告)号：EP1579568A4
公开(公告)日：2006-12-06
申请号：EP03814869
申请日：2003-12-19
Applicant: HARRIS CORP
Inventor： MATTSSON ANDERS S , ABASCAL CARLOS , DUELLO WAYNE , DANIELSSONS DAVE
CPC classification number: H03F1/3241 , H03F1/3247 , H03F1/3258
Abstract: A method and apparatus are disclosed for predistorting an input signal to a non-linear amplifier. An appropriate precorrection is determined for the input signal over a series of iterative stages according to an amplifier model. The amplifier model includes a limiting function that clips the input signal to reduce error due to amplifier saturation. The determined precorrection is then applied to the input signal.
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公开(公告)号：EP1634379A4
公开(公告)日：2007-06-27
申请号：EP04785740
申请日：2004-05-03
Applicant: HARRIS CORP
Inventor： DUELLO WAYNE DOUGLAS , LUU KY THOAI , ABASCAL CARLOS , MATTSSON ANDERS S
CPC classification number: H03F1/3282 , H03F1/3241 , H04B1/0475
Abstract: A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated carrier signal which may exhibit distortions caused by the amplitude modulating of the RF carrier signal. A digitally adaptive corrector precorrects the amplitude varying signal prior to application thereof to the network to compensate for any modulated carrier signal distortions. This includes a digital processor that provides signal correction as a function of digital samples representing amplitude variations of the modulated RF carrier signal.
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Patent Agency Ranking
公开(公告)号：AU2003297374A1
公开(公告)日：2004-07-29
申请号：AU2003297374
申请日：2003-12-19
Applicant: HARRIS CORP
Inventor： MATTSSON ANDERS S , ABASCAL CARLOS , DUELLO WAYNE , DANIELSSONS DAVE
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公开(公告)号：CA2529698C
公开(公告)日：2010-06-29
申请号：CA2529698
申请日：2004-05-03
Applicant: HARRIS CORP
Inventor： DUELLO WAYNE DOUGLAS , LUU KY THOAI , ABASCAL CARLOS , MATTSSON ANDERS S
Abstract: A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated carrier signal which may exhibit distortions caused by the amplitude modulating of the RF carrier signal. A digitally adaptive corrector precorrects the amplitude varying signal prior to application thereof to the network to compensate for any modulated carrier signal distortions. This includes a digital processor that provides signal correction as a function of digital samples representing amplitude variations of the modulated RF carrier signal.
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公开(公告)号：CA2529698A1
公开(公告)日：2005-01-06
申请号：CA2529698
申请日：2004-05-03
Applicant: HARRIS CORP
Inventor： MATTSSON ANDERS S , DUELLO WAYNE DOUGLAS , LUU KY THOAI , ABASCAL CARLOS
Abstract: A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated carrier signal which may exhibit distortions caused by the amplitude modulating of the RF carrier signal. A digitally adaptive corrector precorrects the amplitude varying signal prior to application thereof to the network to compensate for any modulated carrier signal distortions. This includes a digital processor that provides signal correction as a function of digital samples representing amplitude variation s of the modulated RF carrier signal.
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公开(公告)号：CA2512858A1
公开(公告)日：2004-07-22
申请号：CA2512858
申请日：2003-12-19
Applicant: HARRIS CORP
Inventor： DANIELSSONS DAVE , MATTSSON ANDERS S , ABASCAL CARLOS , DUELLO WAYNE
Abstract: A method and apparatus are disclosed for predistorting an input signal to a non-linear amplifier. An appropriate precorrection is determined for the inp ut signal over a series of iterative stages according to an amplifier model. Th e amplifier model includes a limiting function that clips the input signal to reduce error due to amplifier saturation. The determined precorrection is th en applied to the input signal.
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公开(公告)号：CA2280489A1
公开(公告)日：2000-02-19
申请号：CA2280489
申请日：1999-08-18
Applicant: HARRIS CORP
Inventor： KELLER JAMES , ABASCAL CARLOS , HU ZHIQUN , KORTE THEODORE , MALEC JEFFREY
Abstract: An RF power amplifier control system includes a group of power amplifier modules for amplifying an RF signal. Each group includes first and second group controllers controlling the operation of the power amplifier modules including turning on and turning off each of the modules within the group. The first group controller is on for controlling the amplifier operation and the second group controller is turned on for controlling the operation only when the first controller is turned off. First and second central controllers are provided for, controlling the operation of the first and second group controllers. The first central controller is to provide the control operation and the second central controller monitors the operation of the first controller and performs the control operation in the event that the first central controller malfunctions.
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