Cyclic Prefix-Free OFDM/OFDMA Systems, Design, and Implementation
CP-free OFDM/OFDMA system refers to an orthogonal frequency-division multiplexing (OFDM) system or an orthogonal frequency-division multiple access (OFDMA) system, without insertion of cyclic prefix (CP) at the transmitter.
With an increasing demand for a higher data rate, such as 5G, more bandwidths will be required, which makes transmit signals extremely sensitive to inter-symbol interference (ISI) in a multipath channel. Orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency-division multiple access (OFDMA), working as a multi-carrier transmission scheme, receives much attention due to its ability to combat ISI. A common approach to tackle ISI for an OFDM/OFDMA system is to insert a cyclic prefix (CP) at the beginning of every block before transmission. As long as the length of CP is made longer than channel delay spread, ISI...
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