Simulating EVM for a GaN based HEMT power amplifier

There are a number of different ways to simulate EVM using ADS. You can use a Ptolemy co-simulation, you can use Verification Test Benches (see examples/Tutorial/VTB_Basics_wrk), you can simulate EVM from a 1-tone, swept-power harmonic balance simulation.
http://edadocs.software.keysight.com/display/eesofkcads/Computing+Swept+Input+Power+ACPR
http://edadocs.software.keysight.com/pages/viewpage.action?pageId=213462866
http://edadocs.software.keysight.com/display/eesofkcads/Swept+Power+ACPR%2C+EVM%2C+and+PAE+from+Ptolemy+Co-simulation

I am also interested in performing EVM simulation. I tried those links but the first one does't work and the rest of two are dead. Could you kindly post them again? Thank you.

Actually, all of these links are still valid. However, you have to have a login to the Keysight EEsof Knowledge Center to access them. From your e-mail, it appears that you are with a university, so you should be able to get a login. Please contact Keysight EEsof Technical Support.

Also, you can search the ADS examples for EVM (from the ADS Main window, select Tools > Examples Search.) There are many EVM simulation examples using various communications standards.

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