This paper presents MIMO-OFDM channel estimation for spatially correlated channels using frequency domain estimation techniques. First, the exploitation of spatial correlation on further improving the channel estimates is investigated. It is observed that spatial filtering provides additional gain when the spatial correlation and the number of antennas are high. For example, in a system with 16 transmit antennas, the use of additional filtering in spatial domain improves the performance of Mean Square Error (MSE) by 2 dB and that of BER by 0:5 dB, when spatial correlation is around 0:9. Then, equivalence between channel Power Delay Profile (PDP) parameters and parameters extracted from subspace methods in frequency domain is demonstrated. This has the advantage of improving the performance of the channel estimation in frequency domain.
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