optic.comm.metrics.calcEVM

calcEVM(symb, M, constType, symbTx=None)

Calculate error vector magnitude (EVM) metrics.

Parameters:

• symb (np.array) – Sequence of noisy symbols.

• M (int) – Constellation order.

• constType (string) – Modulation type: ‘pam’, ‘qam’ or ‘psk’

• symbTx (np.array, optional) – Sequence of transmitted symbols (noiseless). The default is [].

Returns:

EVM – Error vector magnitude (EVM) per signal dimension.

Return type:

np.array

References

[1] R. A. Shafik, et al, “On the error vector magnitude as a performance metric and comparative analysis”, em 2006 International Conference on Emerging Technologies, 2006, p. 27–31. doi: 10.1109/ICET.2006.335992.

[2] H. A. Mahmoud e H. Arslan, “Error vector magnitude to SNR conversion for nondata-aided receivers”, IEEE Transactions on Wireless Communications, vol. 8, nº 5, p. 2694–2704, 2009, doi: 10.1109/TWC.2009.080862.