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 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 .
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.
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