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 subblock is modeled by a CCE-BEM. Hence, we first develop and analyze the STBC

under this block fading CCE-BEM channel model, and then, we show

how to decode the STBC for real-life channels, which do not exactly

fit this block fading CCE-BEM channel model-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 subblock is modeled by a CCE-BEM. Hence, we first develop and analyze the STBC

under this block fading CCE-BEM channel model, and then, we show

how to decode the STBC for real-life channels, which do not exactly

fit this block fading CCE-BEM channel model