6.3.3 OFDM systems 3.The block diagram of a OFDM system Serial-to- Multicarrier Add cyclic Input prefix and D/A Output to parallet modulator data inverse DFT) parallel-to- converter buffer transmitter serial convert Remove Parallel- Multicarrier cyclic Output to- Detector demodulator prefix and A/D bits serial (DFT) serial-to- converter converter parallel convert Fig 6.50 on p471 Note FFT (or DFT)serves as the demodulator. UESTC-Digital transmission thro BLAWGN channels Prof李晓峰 11