MIMO channel metrics
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Space diversity processing when suitable either at the transmitter side or at the receiver side provides a reduction on the transmitted power for the same received signal quality. The paper discusses the importance of the channel entropy in order to design, derived directly from the channel sounder, first, a system able to decide whether it is worth that the transmitter knows the channel or not (CSIT or Channel State Information at the Transmitter). Second, a channel metric is proposed in order to classify the channel regardless of the Tx-Rx space processing to be used. Among other aspects, this channel classifier would help in designing a vector quantifier to feedback the channel state information to the transmitter when CSIT is required.
CitacióLagunas, M.; Saladrigas, I.; Pérez, A. MIMO channel metrics. A: CODEC06, International Conference on Computers and Devices for Communications. "CODEC06, International Conference on Computers and Devices for Communications". Calcuta: 2006, p. 1-5.