Finding the Bandwidth of PSK Signal

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SUMMARY

The discussion focuses on determining the 3 dB bandwidth of a Phase Shift Keying (PSK) signal, which has a center frequency denoted as f_{c} and utilizes a root raised cosine filter for bandwidth shaping. The main challenge identified is the absence of a specific equation to represent the PSK signal, which prevents the application of the Fourier transform necessary for spectrum analysis. Without the Fourier transform, calculating the bandwidth remains unattainable.

PREREQUISITES
  • Understanding of Phase Shift Keying (PSK) modulation techniques
  • Knowledge of root raised cosine filters and their application
  • Familiarity with Fourier transform concepts and their significance in signal processing
  • Basic principles of bandwidth measurement in communication systems
NEXT STEPS
  • Research the mathematical representation of PSK signals
  • Study the application of Fourier transforms in signal analysis
  • Explore methods for calculating bandwidth in filtered signals
  • Investigate alternative techniques for bandwidth estimation without Fourier transforms
USEFUL FOR

Signal processing engineers, communication system designers, and researchers focused on digital modulation techniques and bandwidth analysis.

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I've got a signal and I would like to find the 3 dB bandwidth. The signal has a center frequency of [tex]f_{c}[/tex] and a has a bandwidth shaping filter applied to it (ie, a root raised cosine filter).

The problem with finding the bandwidth, is that I have no equation for representing a PSK signal. For this reason, I can't take the Fourier transform to get the spectrum. If I could take the Fourier transform, then I could find the bandwidth, but this seems to be a necessary step that I'm unable to take.
 
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