I have a basic question about maximum likelihood (ML) estimator and its implementation with power allocation.
Suppose we are using $MIMO$ system with $4$x$4$ transmit and receive antennas, so the received signal which includes the signal + noise + ISI can be written :
$y = HX + n$
My question is about the possibility to use power allocation to detect the active antenna, which means the estimated signal will be as:
I am asking if we can detect the active antenna in that way, is that possible ? Is there another method we can use instead of that ? Is there any document explain that ?