Back to results
US 7,453,931 B2Granted
Method for measuring the modulation error of digitally modulated high frequency signals
AssigneeRohde & Schwarz GmbH & Co. KG
InventorsRoland Minihold, Albert Winter
Life of this patent
Estimating the term…
Abstract
A method is described for measuring the modulation error in digital modulated high frequency signal, whose amplitude and/or phase is digitally distorted according to a predetermined function, in particular limited by a given clip factor, in which the signal to be measured is compared with a locally generated reference signal that was generated by taking the predetermined distortion function into account.
Claims13
A method for measuring a modulation error, comprising:
- receiving a signal having amplitude distortion or phase distortion on a digital side according to a predetermined function, the signal being a digitally modulated high frequency signal;
- locally generating an ideal reference signal;
- distorting the locally generated, ideal reference signal in accordance with said predetermined function;
- and
- comparing the signal with the distorted, locally generated, ideal reference signal to determine the modulation error.
2 more elements
A measurement device, comprising:
- means for receiving a signal having amplitude distortion or phase distortion on a digital side according to a predetermined function, the signal being a digitally modulated high frequency signal;
- a signal generator for generating an ideal reference signal;
- means for distorting the ideal reference signal in accordance with said predetermined function;
- and
- means for comparing the signal with the distorted, locally generated, ideal reference signal to determine modulation error.
2 more elements
A method for measuring a modulation error, comprising:
- receiving a signal having amplitude distortion or phase distortion on a digital side according to a predetermined clip factor, the signal being a digitally modulated high frequency signal;
- locally generating an ideal reference signal, at a measuring device, by calculation from bits and modulation parameters used for the digital modulation of the signal to be measured;
- entering the predetermined clip factor into the measuring device and distorting the locally generated, ideal reference signal in accordance with the predetermined clip factor;
- and
- comparing the signal with the distorted locally generated, ideal reference signal to determine the modulation error.
2 more elements
Dependencies are inferred from the claim text.