Space- Time Block-Coded OFDM- Space-time coding on two adjacent blocks of data symbols, i.e., X(n)and X(n+1) idFt h() Cycl Prefix Serial to X(m) Parallel idft h2 (n+1) Cyclic Prefix Parallel Combiner Pref to Serial&Detector (n+1) Removal det Channel Estimato Georgia Institute of Technology Center for Signal and Image ProcessingGeorgia Institute of Technology Center for Signal and Image Processing • Space-time coding on two adjacent blocks of data symbols, i.e., X(n) and X(n+1). Space-Time Block-Coded OFDM - I Serial to Parallel IDFT & Cyclic Prefix Prefix Removal & DFT X(m) X(n) Combiner & Detector X(m) Channel Estimator Y(n+1) Tx1 Rx h1(n) Parallel to Serial Y(n) X(n+1) IDFT & Cyclic Prefix Tx2 h2(n) - X(n+1) X(n) * *