OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, OFDM is a fact MCM (Multi Carrier Modulation), multi-carrier modulation. OFDM technology was developed by MCM (Multi-Carrier Modulation, multi-carrier modulation) evolved. OFDM technology is one way to achieve a multi-carrier transmission scheme, its modulation and demodulation, respectively, based on IFFT and FFT to achieve, is to achieve the least complex, the most widely used of a multi-carrier transmission scheme. In the communication system, the bandwidth of the channel can provide is usually higher than the bandwidth required to transmit a signal all the way to much wider. If a channel carries only one signal is very wasteful, in order to take full advantage of the bandwidth of the channel, you can use frequency division multiplexing method.

SAC.docx

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