How to calculate OFDM IQ Amplitude/phase imbalance?

[leoman0704]

Hi all !
i'm working on ofdm signal analysis.
i got a problem ,with How to calculate OFDM IQ Amplitude/phase imbalance?
i didn't have any idea to calculate the Amplitude/phase imbalance value with receive digital signal.

i had try the equation with matlab
receive signal = Yq + j*Yi;
Amplitude(G) = sqrt(E(Yq^2)/E(Yi^2));

G(in db) = 20 log10(G);
but the equation is right ? the value G(in db) is not currectly .

any response will be appricate.
thank you.
Leo

 

[leoman0704]

did any one have idea about this part ?
thank you.