TABLE OF CHALLENGED CLAIMS
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`1[a]
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`1[c]
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`1[d]
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`1[e]
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`1[b]
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`1[pre] An adaptive method for predistorting an RF modulated signal, to be
`transmitted, supplied by a signal source to an input of a power
`amplifier having an output for delivering an amplified output signal,
`said method comprising the steps of:
`predistorting the RF modulated signal to be transmitted using an I/Q
`modulator interposed between the signal source and the input of the
`power amplifier, and controlled by means of amplitude and phase look-
`up tables stored in a distorting generator;
`producing, via a first digital receiver, a first feedback signal in response
`to the RF predistorted signal;
`producing, via a second digital receiver, a second feedback signal in
`response to the RF amplified output signal from the power amplifier;
`modeling the power amplifier in response to the first and second
`feedback signals; and
`updating the predistortion amplitude and phase look-up tables in
`response to said modeling of the power amplifier,
`wherein said second feedback signal includes the complex envelope of
`the RF amplified output signal, and
`wherein said modeling step includes the discrimination of the complex
`envelope of the first feedback signal referenced to the complex
`envelope of the second feedback signal to yield a predistortion function
`correlated to a behaviour of the power amplifier including
`nonlinearities and memory effects.
`An adaptive method as recited in claim 1, wherein said modeling step
`is done in real time.
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`1[f]
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`1[g]
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`2
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`3[a]
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`3[pre] An adaptive method for predistorting an RF modulated signal, to be
`transmitted, supplied by a signal source to an input of a power
`amplifier having an output for delivering an amplified output signal,
`said method comprising the steps of:
`predistorting the RF modulated signal to be transmitted using an I/Q
`modulator interposed between the signal source and the input of the
`power amplifier, and controlled by means of amplitude and phase look-
`up tables stored in a distorting generator;
`producing, via a first digital receiver, a first feedback signal in response
`to the RF predistorted signal;
`producing, via a second digital receiver, a second feedback signal in
`response to the RF amplified output signal from the power amplifier;
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`3[b]
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`3[c]
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`1
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`PETITIONERS EXHIBIT 1028
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`TABLE OF CHALLENGED CLAIMS
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`3[d]
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`3[e]
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`3[f]
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`4
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`modeling the power amplifier in response to the first and second
`feedback signals; and
`updating the predistortion amplitude and phase look-up tables in
`response to said modeling of the power amplifier,
`wherein said updating step is done when a linearity metric adjacent
`channel power ratio (ACPR) measurement sub-step indicates that the
`predistorting step is not adequate to meet predetermined ACPR
`standards.
`An adaptive method as recited in claim 3, wherein said linearity metric
`ACPR measurement sub-step is done via a digital receiver that includes
`a first channel tuned to a mean frequency and a second channel that is
`tuned to a predetermined offset frequency, said linearity metric ACPR
`measurement sub-step including comparing an average power at the
`mean frequency and at the predetermined offset frequency.
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`5[a]
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`5[b]
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`5[c]
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`5[d]
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`5[pre] An adaptive device for predistorting an RF modulated signal to be
`transmitted, supplied by a signal source to an input of a power
`amplifier having an output for delivering an amplified output signal,
`said adaptive device comprising:
`an I/Q modulator interposed between the signal source and the input of
`the power amplifier;
`a distorting generator including predistortion amplitude and phase
`look-up tables; said distorting generator controlling said I/Q modulator
`to predistort the RF modulated signal to be transmitted in amplitude
`and in phase;
`a first digital receiver producing a first feedback signal in response to
`the RF predistorted signal from said I/Q modulator;
`a second digital receiver producing a second feedback signal in
`response to the RF amplified output signal from the power amplifier;
`a control module receiving said first and second feedback signals from
`said first and second digital receivers; said control module being so
`configured as to model the power amplifier in response to the first and
`second feedback signals and to update said amplitude and phase look-
`up tables of said distorting generator in response to a dynamic
`modeling of the power amplifier;
`wherein said look-up tables of said distorting generator are indexed by
`an envelope detector that detects the envelope of the signal to be
`transmitted before predistortion.
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`5[e]
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`5[f]
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`2
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`TABLE OF CHALLENGED CLAIMS
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`6
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`An adaptive device as recited in claim 5, wherein said envelope
`detector indexes the distorting generator via an analog to digital
`converter.
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`7[a]
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`7[b]
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`7[c]
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`7[d]
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`7[e]
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`7[pre] An adaptive device for predistorting an RF modulated signal to be
`transmitted, supplied by a signal source to an input of a power
`amplifier having an output for delivering an amplified output signal,
`said adaptive device comprising:
`an I/Q modulator interposed between the signal source and the input of
`the power amplifier;
`a distorting generator including predistortion amplitude and phase
`look-up tables; said distorting generator controlling said I/Q modulator
`to predistort the RF modulated signal to be transmitted in amplitude
`and in phase;
`a first digital receiver producing a first feedback signal in response to
`the RF predistorted signal from said I/Q modulator;
`a second digital receiver producing a second feedback signal in
`response to the RF amplified output signal from the power amplifier;
`a control module receiving said first and second feedback signals from
`said first and second digital receivers; said control module being so
`configured as to model the power amplifier in response to the first and
`second feedback signals and to update said amplitude and phase look-
`up tables of said distorting generator in response to a dynamic
`modeling of the power amplifier;
`wherein said look-up tables of said distorting generator are indexed by
`data from a third digital receiver that down-converts the signal to be
`transmitted to baseband.
`An adaptive device as recited in claim 7, wherein the data from said
`third digital receiver is supplied to said control module that indexes
`said distorting generator accordingly.
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`7[f]
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`8
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`9[pre] An adaptive device for predistorting an RF modulated signal to be
`transmitted, supplied by a signal source to an input of a power
`amplifier having an output for delivering an amplified output signal,
`said adaptive device comprising:
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`3
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`9[a]
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`9[b]
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`9[c]
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`9[d]
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`9[e]
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`9[f]
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`10
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`TABLE OF CHALLENGED CLAIMS
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`an I/Q modulator interposed between the signal source and the input of
`the power amplifier;
`a distorting generator including predistortion amplitude and phase
`look-up tables; said distorting generator controlling said I/Q modulator
`to predistort the RF modulated signal to be transmitted in amplitude
`and in phase;
`a first digital receiver producing a first feedback signal in response to
`the RF predistorted signal from said I/Q modulator;
`a second digital receiver producing a second feedback signal in
`response to the RF amplified output signal from the power amplifier;
`a control module receiving said first and second feedback signals from
`said first and second digital receivers; said control module being so
`configured as to model the power amplifier in response to the first and
`second feedback signals and to update said amplitude and phase look-
`up tables of said distorting generator in response to a dynamic
`modeling of the power amplifier,
`wherein said control module is so configured as to update said
`amplitude and phase look-up tables when an adjacent channel power
`ratio (ACPR) measurement indicates that the predistortion made by
`said predistorting generator is not adequate to meet predetermined
`ACPR standards.
`An adaptive device as recited in claim 9, wherein said ACPR
`measurement is done via said second digital receiver that includes a
`first channel tuned to a mean frequency and a second channel that is
`tuned to a predetermined offset frequency, said ACPR measurement
`including comparing an average power at the means frequency and at
`the predetermined offset frequency.
`
`11[a]
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`11[pre] An adaptive device for predistorting an RF modulated signal to be
`transmitted, supplied by a signal source to an input of a power
`amplifier having an output for delivering an amplified output signal,
`said adaptive device comprising:
`an I/Q modulator interposed between the signal source and the input of
`the power amplifier;
`a distorting generator including predistortion amplitude and phase
`look-up tables; said distorting generator controlling said I/Q modulator
`to predistort the RF modulated signal to be transmitted in amplitude
`and in phase;
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`11[b]
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`4
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`TABLE OF CHALLENGED CLAIMS
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`a first digital receiver producing a first feedback signal in response to
`the RF predistorted signal from said I/Q modulator;
`a second digital receiver producing a second feedback signal in
`response to the RF amplified output signal from the power amplifier;
`a control module receiving said first and second feedback signals from
`said first and second digital receivers; said control module being so
`configured as to model the power amplifier in response to the first and
`second feedback signals and to update said amplitude and phase look-
`up tables of said distorting generator in response to a dynamic
`modeling of the power amplifier;
`wherein said control module is further configured as to insert an
`adequate delay between the first feedback signal and the second
`feedback signal.
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`11[c]
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`11[d]
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`11[e]
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`11[f]
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`5
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