OFDM調(diào)制解調(diào)電路的基本構(gòu)成方框圖
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OFDM調(diào)制解調(diào)電路的基本構(gòu)成方框圖,輸入數(shù)據(jù)經(jīng)串,井轉(zhuǎn)換成并行的多路數(shù)據(jù),
經(jīng)多路調(diào)制后再經(jīng)并,串轉(zhuǎn)換變成串行數(shù)據(jù),再經(jīng)D/A轉(zhuǎn)換,然后經(jīng)低通濾波器和調(diào)制器調(diào)制后經(jīng)帶通濾
波器(BPF),然后進(jìn)行發(fā)射傳輸。在接收端經(jīng)帶通濾波器(BPF)將載波選入,再進(jìn)行解調(diào)和低通取出
調(diào)制信號(hào),然后經(jīng)A/D轉(zhuǎn)換器再變成數(shù)據(jù)信號(hào),數(shù)據(jù)信號(hào)經(jīng)串,并轉(zhuǎn)換變成多路多載頻調(diào)制信號(hào),經(jīng)OFDM
解調(diào)后經(jīng)并,串轉(zhuǎn)換恢復(fù)成原數(shù)據(jù)信號(hào)輸出。