Expresiones analíticas de capacidad de sistemas MIMO-OSFBC

Abstract

Orthogonal frequency-division multiplexing (OFDM) combined with orthogonal space-frequency block coding (OSFBC) has been shown to be a simple and efficient means to exploit the inherent spatial diversity of multiple-input-multipleoutput (MIMO) configurations in frequency-selective channels. In this paper we derive simple analytical closed-form expressions for the ergodic and outage capacity of OSFBC-OFDM systems assuming that the channel is unknown at the transmitter. The resulting expressions are simple functions of the spatial correlation matrices at the channel taps. They clearly reveal the dependence of the capacity on the channel and system parameters. Numerical results show the excellent accuracy of the derived expressions.