中文说明：在单载波通信系统中，符号周期必须远远大于延迟时间，以避免符号间干扰 （ISI） [1]。由于数据速率是符号周期成反比的有长符号周期意味着低数据率和沟通效率低下。多载波系统，如有限差分法 （aka： 频分复用），在光谱中总的可用带宽划分为多个运营商传输并行 [2] 的子带。整体高数据速率可以通过放置载体密切在光谱中。但是，载波间干扰 （ICI） 会发生由于缺乏间距要分开运营商。若要避免载波间干扰，保护频带需要放在之间任何相邻的载体，在降低的数据率的结果。OFDM （又名： 正交频分复用
English Description：
In a single carrier communication system, the symbol period must be much greater than the delay time in order to avoid inter-symbol interference (ISI)[1]. Since data rate is inversely proportional to symbol period, having long symbol periods means low data rate and communication inefficiency. A multicarrier system, such as FDM (aka: Frequency Division Multiplexing), divides the total available bandwidth in the spectrum into sub-bands for multiple carriers to transmit in parallel [2]. An overall high data rate can be achieved by placing carriers closely in the spectrum. However, inter-carrier interference (ICI) will occur due to lack of spacing to separate the carriers. To avoid inter-carrier interference, guard bands will need to be placed in between any adjacent carriers, which results in lowered data rate. OFDM (aka: Orthogonal Frequency Division Multiplexing