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The probability of bit error of multiple-input multiple-output spatial multiplexing (MIMO-SM) systems employing linear zero-forcing (ZF) receivers is addressed. In this paper, we first present a near exact approximation for the average bit error rate (BER) of each substream with quaternary phase-shift keying (QPSK) in spatially correlated Ricean distributed channels. Then a closed-form expression...
A multi-user MIMO channel is characterized by multiple degrees of freedom that can be alternatively exploited for increasing the link quality through diversity or improving the achievable data-rate through spatial multiplexing. A convenient trade-off between diversity and multiplexing gain is achieved by multi-user orthogonal space-time block coding (OSTBC): an independent space-time code is employed...
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