Estratégias de Transmissão para Sistemas MIMO com Canal de Realimentação Quantizado

This paper presents two transmission schemes for MIMO systems considering the use of a precoding at the transmitter. The precoders are updated at each new transmission frame and this updating is based on the feedback information. One transmission scheme uses the precoder for rotating the transmitted symbol phase, while the other one considers the precoder for power allocation at the transmitter. Results revel that the scheme which consider the power allocation at the transmitter presents a better performance than the one which considers phase rotation.