Hi,
I am trying to simulate EVM of a MUX based QPSK modulator as shown in attached figure. There are 4 1Vpeak sines at 5GHz with phases 0, 90, 180, 270. The select switch of the MUX is controlled by switches S0, S1. The bit rate is 2Mbps and hence symbol rate is 1Mbps.
The envlp analysis form and direct plot form are also attached.
The EVM is unrealistic and is 98.9%. The I components are +-0.6 and Q components are +-3.3
This is not a traditonal IQ modulation. How to evaluate EVM for this in ADE? The transient output is perfect showing QPSK modulation.
Note: It is very difficult to upload images in this forum!!!!
