Method and device for detecting power of a periodic signal in a band of interest
AssigneeKeysight Technologies, Inc.
InventorsJoel P. Dunsmore, Jean-Pierre Teyssier
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Abstract
A method is provided for detecting power of a periodic signal in a band of interest of the periodic signal having a predetermined bandwidth. The method includes determining frequencies of multiple tones in the periodic signal, respectively; receiving the periodic signal at a signal analyzer; selectively measuring power values at the frequencies of the multiple tones; and determining a band power of the periodic signal over the predetermined bandwidth by summing the power values at the frequencies of the multiple tones.
Claims20
A method of detecting power of a periodic signal in a band of interest of the periodic signal having a predetermined bandwidth, the method comprising:
- determining frequencies of multiple tones in the periodic signal, respectively, the multiple tones being within the predetermined bandwidth;
- receiving the periodic signal at a signal analyzer in a time domain, and transforming the periodic signal including the multiple tones to a frequency domain;
- selectively measuring power values at the frequencies of the multiple tones in the periodic signal in the frequency domain;
- and
- determining a band power of the periodic signal over the predetermined bandwidth by summing only the power values selectively measured at the frequencies of the multiple tones, excluding power values at frequencies not corresponding to the frequencies of the multiple tones.
A signal analyzing device, comprising:
- a receiver for receiving a periodic signal from a device under test (DUT) in a time domain, the periodic signal including a band of interest having a predetermined bandwidth;
- and
- a processing unit configured to execute instructions, stored in a non-transitory memory, wherein executing the instructions causes the processing unit to determine frequencies of multiple tones in the predetermined bandwidth of the periodic signal, respectively, to transform the periodic signal to a frequency domain, to selectively measure power values at the determined frequencies of the multiple tones of the periodic signal in the frequency domain, respectively, and to sum only the selectively measured power values at the determined frequencies of the multiple tones, excluding power values at frequencies not corresponding to the frequencies of the multiple tones, to determine a band power over the predetermined bandwidth of the periodic signal.
A signal analyzing device, comprising:
- a receiver for receiving a periodic signal from a device under test (DUT) in a time domain, the periodic signal having a repeating waveform and including a band of interest having a predetermined bandwidth;
- an analog-to-digital converter (ADC) for sampling the periodic signal;
- and
- a processing unit configured to execute instructions, stored in a non-transitory memory, wherein executing the instructions causes the processing unit to:
- acquire data from the sampled periodic signal in the time domain over multiple periods of the repeating waveform of the periodic signal;
- average the acquired data in the time domain;
- transform the periodic signal with the averaged data to a frequency domain;
- selectively measure power values at frequencies of multiple tones of the periodic signal in the frequency domain, respectively;
- and
- sum only the selectively measured power values at the frequencies of the multiple tones, excluding power values at frequencies not corresponding to the frequencies of the multiple tones, to determine a band power over the predetermined bandwidth of the periodic signal.
Dependencies are inferred from the claim text.