MIMO-OFDM and its application

In the last decade, we have witnessed revitalization of multi-carrier techniques, and in particular orthogonal frequency division multiplexing (OFDM) for wireless applications. For wireless applications, an OFDM air-interface is of interest, because it can turn a wideband frequency selective channel into narrowband frequency flat channels. This makes the receiver design particularly easy since it eliminates the need for equalizers and produces robustness to fading and other channel artifacts. Additionally, because OFDM produces time-frequency blocks in a natural manner, it leads to multiple-access techniques such as orthogonal frequency division multiple access (OFDMA).