Signal/Data Processing Question

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SUMMARY

The discussion focuses on methods to separate signal from noise in data sets, particularly in the context of RF signal strength measurements. Participants suggest that the signal appears to be lower frequency than the noise and inquire about the nature of the data, including whether it originates from a log detector or radar pulses. Key questions include the identification of regular high amplitude spikes and the influence of termination resistors on the noise floor. The necessity of defining an ideal signal without noise is emphasized for effective analysis.

PREREQUISITES
  • Understanding of RF signal processing
  • Familiarity with log detectors and radar signal characteristics
  • Knowledge of signal-to-noise ratio concepts
  • Experience with band-pass filtering techniques
NEXT STEPS
  • Research band-pass filtering methods for signal separation
  • Explore techniques for analyzing RF signal strength in dB
  • Learn about the impact of termination resistors on noise performance
  • Investigate the use of boxcar integrators in signal processing
USEFUL FOR

This discussion is beneficial for signal processing engineers, RF engineers, and researchers involved in data analysis and noise reduction techniques in electronic signals.

crispyrice2008
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Hi,

I'm curious if there is a method to separate the signal from the noise in this kind of data set, other than manually do it by indexing.
the top plot is the data, the bottom plot is the zoom in of the data.
the time length for signal & data are relatively constant throughout the data, it always follow the order: noise, data, noise, data...


2eobpra.png
 
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Looks like the signal is lower frequency than the noise. Can you band-separate the signal from the noise?
 
Welcome to PF>

What are the regular high amplitude spikes? a reliable part of the the signal or synchronous noise?
What is the data? Is it RF signal strength in dB from a log detector? Maybe radar pulses?
Is it output from a two channel switching detector, so an application for a boxcar integrator?

Why is the noise floor with signal lower than without signal?
Is it a 50 ohm termination resistor at room temperature compared to a FET low noise signal preamp?

Is the raw signal, IF, available before log detection?

We cannot find something if we do not know what you are looking for.
I think it is necessary for you to define or identify what an ideal signal without noise would be.
 

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