Preliminary Technical
Data
Rev. PrA | Page 58 of 82
Applying the CFR settings discussed in earlier section, where we have the target PAR set to 8 dB, the degradation observed in
EVM is shown in Figure 61.
Figure 61. Observed EVM After Applying CFR (Target PAR = 8 dB)
We can see above that the rms EVM degraded from 0.6 % to 2% due to application of CFR. From a quick sweep of the rms EVM at
different target PAR, we see the trend shown in Figure 62. Note that different systems have different requirements for maximum
tolerable EVM degradation due to CFR, which would drive the minimum achievable PAR for a given waveform configuration. Note
also that the performance shown here is highly dependent on the “goodness” of the CFR correction pulse. With a different pulse,
we should expect a different result.
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