OFDM can generate a new symbol (composed of 48 subcarriers) every 4 microseconds . Based on that, it’s possible to signal 250,000 symbol transitions every second on each of the subcarriers.
Read moreWhat is OFDM symbol time?
802.11ax introduces a longer OFDM symbol time of 12.8 μs , which is four times longer than the legacy symbol time of 3.2 μs. Subcarrier spacing is equal to the reciprocal of the symbol time. As a result of the longer symbol time, the subcarrier size and spacing decreases from 312.5 KHz to 78.125 KHz.
Read moreWhy SC-FDMA is used in?
SC-FDMA is preferred for LTE uplink mainly due to its advantage of having low peak-to-average power ratio (PAPR) during signal transmission. The performance of SC-FDMA depends on modulation scheme used for it.
Read moreDoes 5G use FDMA?
Direct Fourier Transform spread OFDM, commonly abbreviated to DFT-s-OFDM, is an SC or single carrier-like transmission scheme that can be combined with OFDM that gives significant flexibility for a mobile communications system like 5G. It is more commonly known as SC-FDMA .
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