Real-time digital phase and gain adaptation method using feedback and arrangement using such a method
First Claim
1. An arrangement for correcting gain as a function of amplitude and of correcting frequency-dependent gain and phase for a device with a digital input signal and an analogue output signal, said arrangement comprising:
- a gain correction block said gain correction block being connected at a first input for receiving an input signal, further being connected in a feedback path to an input of a power amplifier through a first output of said gain correction block and through a second input of said gain correction block to an output of said power amplifier;
said gain correction block being arranged for receiving said input signal at a third input and a gain reference signal at said second input and for correcting a first power of said input signal, relative to a second power of said output signal, to form a predistorted outgoing signal and for outputting said pre-distorted outgoing signal at said first output, said gain reference signal having a gain identical to said second power of said output signal relative to said first power of said input signal, and a phase correction block said phase correction block being connected at a third input for receiving said input signal, said phase correction block being connected in said feedback path to said input of said power amplifier through a first output of said phase correction block, and through a second input of said phase correction block to said output of said power amplifier;
said phase correction block being arranged for receiving said input signal at a third input and a phase reference signal at said second input and for correcting said first absolute phase of said input signal, relative to said second absolute phase of said output signal, as a function of frequency to form a phase-corrected outgoing signal and for outputting at said first output said phase-corrected outgoing signal, said phase reference signal having a phase value identical to said second absolute phase of said output signal relative to said first absolute phase of said input signal, said gain correction block and said phase correction block using a single feedback signal in said feedback path for deriving said gain reference signal and said phase reference signal, respectively.
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Abstract
Arrangement for real-time phase and gain adaptation as a function of frequency and gain adaptation as a function of amplitude of an input signal in relation to an output signal, the input signal having a first absolute phase and first power as a function of frequency, the output signal having a second absolute phase and second power as a function of frequency, the output signal, in use, being amplified relative to the input signal, the arrangement including a gain correction, and a power amplifier, the gain correction being arranged for receiving the input signal at a third input and a gain reference signal at the second input and for correcting the first power of the input signal, relative to the second power of the output signal, to form a predistorted outgoing signal and for outputting at the first output the predistorted outgoing signal, the gain reference signal having a gain value identical to the second power of the output signal relative to the first power of the input signal, wherein the arrangement includes a phase correction arranged for receiving the input signal at a third input and a phase reference signal at the second input and for correcting the first absolute phase of the input signal, relative to the second absolute phase of the output signal, as a function of frequency to form a phase-corrected outgoing signal and for outputting at the first output the phase-corrected outgoing signal, the phase reference signal having a phase value identical to the second absolute phase of the output signal relative to the first absolute phase of the input signal, the gain correction and the phase correction using a single feedback signal in the feedback path for deriving the gain reference signal and the phase reference signal, respectively.
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Citations
11 Claims
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1. An arrangement for correcting gain as a function of amplitude and of correcting frequency-dependent gain and phase for a device with a digital input signal and an analogue output signal, said arrangement comprising:
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a gain correction block said gain correction block being connected at a first input for receiving an input signal, further being connected in a feedback path to an input of a power amplifier through a first output of said gain correction block and through a second input of said gain correction block to an output of said power amplifier;
said gain correction block being arranged for receiving said input signal at a third input and a gain reference signal at said second input and for correcting a first power of said input signal, relative to a second power of said output signal, to form a predistorted outgoing signal and for outputting said pre-distorted outgoing signal at said first output, said gain reference signal having a gain identical to said second power of said output signal relative to said first power of said input signal, and a phase correction block said phase correction block being connected at a third input for receiving said input signal, said phase correction block being connected in said feedback path to said input of said power amplifier through a first output of said phase correction block, and through a second input of said phase correction block to said output of said power amplifier;
said phase correction block being arranged for receiving said input signal at a third input and a phase reference signal at said second input and for correcting said first absolute phase of said input signal, relative to said second absolute phase of said output signal, as a function of frequency to form a phase-corrected outgoing signal and for outputting at said first output said phase-corrected outgoing signal, said phase reference signal having a phase value identical to said second absolute phase of said output signal relative to said first absolute phase of said input signal, said gain correction block and said phase correction block using a single feedback signal in said feedback path for deriving said gain reference signal and said phase reference signal, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for real-time phase and gain adaptation as a function of frequency and gain adaptation as a function of amplitude of an input signal in relation to an output signal, said input signal having a first absolute phase and first power as a function of frequency, said output signal having a second absolute phase and second power as a function of frequency, said output signal, in use, being amplified relative to said input signal,
said method comprising a gain correction and a phase correction; -
said gain correction comprising;
receiving said input signal and a gain reference signal from a feedback path, correcting said first power of said input signal, relative to said second power of said output signal, into a predistorted outgoing signal, and outputting said predistorted outgoing signal, said gain reference signal having a gain value identical to said second power of said output signal relative to said first power of said input signal, and;
said phase correction comprising;
receiving said input signal and a phase reference signal from said feedback path, correcting said first absolute phase of said input signal, relative to said second absolute phase of said output signal, as a function of frequency into a phase-corrected outgoing signal, and outputting said phase-corrected outgoing signal, said phase reference signal having a phase value identical to said second absolute phase of said output signal relative to said first absolute phase of said input signal, wherein said gain correction and said phase correction are using a single feedback signal in said feedback path for deriving said gain reference signal and said phase reference signal, respectively.
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10. A computer program product for correcting gain as a function of amplitude and of correcting frequency-dependent gain and phase for a device with a digital input signal and an analogue output signal, said computer program product comprising:
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instructions in a computer readable media for said gain correction comprising;
instructions for receiving said input signal and a gain reference signal from a first feedback loop, instructions for correcting said first power of said input signal, relative to said second power of said output signal, as a function of frequency into a predistorted outgoing signal, and instructions for outputting said predistorted outgoing signal, said gain reference signal having a gain value identical to said second power of said output signal relative to said first power of said input signal, and instructions in the computer readable media for said phase correction comprising;
instructions for receiving said input signal and a phase reference signal from said feedback path, instructions for correcting said first absolute phase of said input signal, relative to said second absolute phase of said output signal, as a function of frequency into a phase-corrected outgoing signal, and instructions for outputting said phase-corrected outgoing signal, said phase reference signal having a phase value identical to said second absolute phase of said output signal relative to said first absolute phase of said input signal, wherein said gain correction and said phase correction are using a single feedback signal in said feedback path for deriving said gain reference signal and said phase reference signal, respectively.
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11. (canceled)
Specification