Optimal Transmit Signal Design for Estimation of Spatially Correlated MIMO-OFDM Channels

초록

In this paper, we design an optimal training scheme for multiple-input multiple-out (MIMO) orthogonal frequency division multiplexing (OFDM) systems under spatially correlated frequency-selective fading channels. We first develop the optimal pilot symbols and placement of pilot tones with respect to the mean square error of the linear channel estimate. Then, we derive the optimal power allocation for pilot symbols in two-dimensional way: Key words: Channel estimation, MIMO-OFDM, MMSE, pilot symbol, spatially correlated channels