Measuring the BER and the EVM for Signals with Low SNR

Signals with low signal-to-noise ratios (SNR) often cause bit errors during demodulation, so that modulation accuracy values such as the error vector magnitude (EVM) may not be determined correctly.

This application sheet describes:

  • The significance of the Bit Error Rate (BER) parameter for signal analysis
  • How the R&S FSW VSA application calculates the BER and determines bit errors
  • How this knowledge can be used to obtain correct modulation accuracy results
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