Finite-snr Dmt of Mimo System with Zf Receiver

In Multiple Input and Multiple Output (MIMO) systems, spectral efficiency can be increased when compared to single antenna systems without increasing transmit power., A point-to-point MIMO system is considered along with a zero-forcing (ZF) linear receiver. At the receiver, perfect channel state information (CSI) is assumed. Also, at the transmitter no CSI is assumed. The diversity and multiplexing gain (DMT) is metric for comparison of multiple-antenna systems. We compute the exact closed-form expression of the DMT of this MIMO system with a ZF receiver at finite signal-to-noise ratio (SNR). We show that the asymptotic diversity gain at practical SNRs is quite optimistic and hence it is better to use DMT at finite-SNR for system analysis.