(
5
)
where N0 is power of the additive noise. Throughout the simulations, we'll compare the results with “ideal” precoding. With this, we mean a precoding where the precoding matrices are always up to date with the latest channel information. This would be equivalent to performing a sounding right before the transmission of the MU packet. Note that there will still be a small amount of change since there is a small time lag between the sounding and the actual transmission, but it is minimal. The channels used in the simulation are complex-valued Gaussian channels.