IQ Mismatch EVM Impairment
I and Q gain offsets or different amplitude ripple performance, will degrade EVM. The different amplitude transfer functions will shift all constellation points as will be described.
I and Q phase transfer functions may differ at all or some of the frequencies effectively skewing the ideal 900 phase between I and Q degrading EVM.
The different phase transfer functions will shift all constellation points as also presented in this video.
Academic articles by Dror Regev on RF related topics, can be found at https://scholar.google.com/citations?...
