Stats

  • Locked Locked
  • Replies 0
  • Subscribers 62
  • Views 15984
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

EVM simulation using envlp analysis

radiowaves

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!!!!


Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.