摘要
正交频分复用调制（ＯＦＤＭ）是一种信道利用率很高的调制方式，具有良好的抗衰落能力，可实现并行传送。它所发送的信号是由一组正交的正弦信号作为副载波，用码元周期为Ｔ的不归零方波作为基带码型调制而成的。其信号产生与解调的过程为ＩＤＦＴ／ＤＦＴ的变换过程。
OFDM is a modulation method which was often used in the channels. It has better capability against the fading and can realized parallel transmission. The transmitted signals which were modulated is a group of orthogonal sine signals as subcarrier and non-regular zero square waves that the code elements period is T as baseband coded formats. The process of signals production and demodulation is a transform process of IDFT/DFT.
作者
张峻峰
Tianjin University Zhang Junfeng
