Description: OFDM (Orthogonal Frequency Division Multiplexing) technology is MCM (Multi-Carrier Modulation, multi-carrier modulation) is. The main idea is to channel into a number of orthogonal sub-channel, high-speed data signals into sub-parallel low-speed data streams, modulation in the transmission on each channel. Orthogonal signal at the receiving end through the use of related technologies to separate, thus reducing the mutual interference between the channel (ICI). Each channel on the signal bandwidth is less than the relevant channel bandwidth on each channel of the decline can be seen as flat, make it possible to eliminate inter-symbol interference. And because of the bandwidth of each channel is the original channel only a small portion of bandwidth, channel capacity become relatively balanced
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