I was working with the 3GPP release 14.6, and it mentioned that modern communication systems have cross polarized antennas, and in order to perform beam-forming we need to co-phase our pre-coder.
Pre-coding is an algorithm we use at the transmitter side in order to aid our performance at the receiver. We model our system as $y = Hx$ where H is the channel,x is transmitted data and y is received data.
Instead of sending $x$ we send $Wx$ where W is our pre-coder, our system would then be $y = HWx$ assuming we have the channel at the transmitter side we can just make $W = H^{-1}$ that way the channel doesn't affect the data.
What does co-phasing between cross-polarized antennas mean and how does it affect my precoder?