2x2 stbc-ofdm channel environment at selective and flat fading channel

Orthogonal STBC [4], [5] has been designed to achieve the spatial diversity offered by multiple transmit and/or receive antennas. The STBC schemes proposed in [4] and [5] are designed for flat-fading channels, which lead to a performance degradat

Both these questions can be answered by assuming a restrictive yet simple doubly-selective channel model. More specifically, we assume ablock fading CCE-BEMchannel, which is defined as a block fading channel where the time-variation subblock to