Automatic optimization method of performance parameters of a signal generator circuit
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsAjan JOSHI, Florian FISCHBACHER, Haisang YU, Chlodwig NEUHAEUSLER, Michael KOENIG
Life of this patent
Estimating the term…
Abstract
An optimization method of automatically optimizing a performance parameter of a signal generator circuit is described. An RF output signal is generated by the signal generator circuit. A performance parameter of the signal generator circuit is determined based on the RF output signal by the control circuit. At least one operational parameter of the signal generator circuit is adapted by the control circuit in order to optimize the performance parameter. Further, a signal generator circuit is described.
Claims21
An optimization method of automatically optimizing a performance parameter of a signal generator circuit, the signal generator circuit comprising a digital signal generator circuit, a digital compensation circuit, at least one digital-to-analog converter (DAC), an IQ modulation circuit, an RF circuit, and a control circuit, the optimization method comprising the steps of:
- generating, by the digital signal generator circuit, a digital baseband signal;
- filtering, by the digital compensation circuit, the digital baseband signal, thereby obtaining a filtered baseband signal;
- converting, by the at least one DAC, the filtered baseband signal into an analog baseband signal;
- modulating, by the IQ modulation circuit, the analog baseband signal, thereby obtaining a modulated RF signal,
- processing, by the RF circuit, the modulated RF signal, thereby obtaining an RF output signal,
- determining, by the control circuit, a performance parameter of the signal generator circuit based on the RF output signal, and
- automatically adapting, by the control circuit, at least one operational parameter of the signal generator circuit in order to optimize the performance parameter;
- wherein the at least one operational parameter comprises a power level of the digital baseband signal, a baseband frequency offset of the digital baseband signal, a filter headroom of the digital compensation circuit, a frequency response of the digital compensation circuit, an operating point of the at least one DAC, an IQ offset of the IQ modulation circuit, a gain of the IQ modulation circuit, a quadrature value of the IQ modulation circuit, and/or an RF frequency offset of the RF circuit.
A signal generator circuit, comprising a digital signal generator circuit, a digital compensation circuit, at least one digital-to-analog converter (DAC), an IQ modulation circuit, an RF circuit, and a control circuit,
- wherein the digital signal generator circuit is configured to generate a digital baseband signal,
- wherein the digital compensation circuit is configured to filter the digital baseband signal, thereby obtaining a filtered baseband signal,
- wherein the at least one DAC is configured to convert the filtered baseband signal into an analog baseband signal,
- wherein the IQ modulation circuit is configured to modulate the analog baseband signal, thereby obtaining a modulated RF signal,
- wherein the RF circuit is configured to process the modulated RF signal, thereby obtaining an RF output signal,
- wherein the control circuit is configured to determine a performance parameter of the signal generator circuit based on the RF output signal,
- wherein the control circuit is configured to automatically adapt at least one operational parameter of the signal generator circuit in order to optimize the performance parameter, and
- wherein the at least one operational parameter comprises a power level of the digital baseband signal, a baseband frequency offset of the digital baseband signal, a filter headroom of the digital compensation circuit, a frequency response of the digital compensation circuit, an operating point of the at least one DAC, an IQ offset of the IQ modulation circuit, a gain of the IQ modulation circuit, a quadrature value of the IQ modulation circuit, and/or an RF frequency offset of the RF circuit.
A signal generator circuit, comprising a digital signal generator circuit, a digital compensation circuit, at least one digital-to-analog converter (DAC), an IQ modulation circuit, an RF circuit, and a control circuit,
- wherein the digital signal generator circuit is configured to generate a digital baseband signal,
- wherein the digital compensation circuit is configured to filter the digital baseband signal, thereby obtaining a filtered baseband signal,
- wherein the IQ modulation circuit is configured to modulate the filtered baseband signal, thereby obtaining a digital modulated RF signal,
- wherein the at least one DAC is configured to convert the digital modulated RF signal into a modulated RF signal, wherein the modulated RF signal is an analog signal,
- wherein the RF circuit is configured to process the modulated RF signal, thereby obtaining an RF output signal,
- wherein the control circuit is configured to determine a performance parameter of the signal generator circuit based on the RF output signal,
- wherein the control circuit is configured to automatically adapt at least one operational parameter of the signal generator circuit in order to optimize the performance parameter, and
- wherein the at least one operational parameter comprises a power level of the digital baseband signal, a baseband frequency offset of the digital baseband signal, a filter headroom of the digital compensation circuit, a frequency response of the digital compensation circuit, an operating point of the at least one DAC, and/or an RF frequency offset of the RF circuit.
Dependencies are inferred from the claim text.