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(OFDM) In 802.11ac, a channel of 20MHz is split into 64 subcarriers, out of which 56 subcarriers are used, i.e., 52 subcarriers are used for

(OFDM) In 802.11ac, a channel of 20MHz is split into 64 subcarriers, out of which 56 subcarriers are used, i.e., 52 subcarriers are used for data transmissions and the other 4 are for pilot. Please calculate 1) the bandwidth for each subcarrier; 2) the theoretical bound of data rate when 256-QAM with a coding rate of 3/4 is used, and guard interval is 800ns

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