By transforming a wideband signal into an array of orthogonal narrowband signals, the Orthogonal Frequency Division Multiplexing (OFDM) scheme converts a wideband frequency-selective fading channel into a bank of sub-channels that suffer from frequency non-selective fading only. The received sample of the mth sub-channel at the nth regular symbol interval is then given by Y{sub}mn=H{sub}mnX{sub}mn+N{sub}mn
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机译：通过将宽带信号转换为正交窄带信号的阵列，正交频分复用（OFDM）方案将宽带频率选择性衰减信道转换为仅遇到频率非选择性逐渐衰落的子信道库中。然后由y {sub} mn = h {sub} mn + n {sub} mn给出第n个规则符号间隔处的Mth子信道的接收样本
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