SC-FDMA has drawn great attention as an attractive alternative to OFDMA, especially in the uplink communications where lower peak-to-average power ratio (PAPR) greatly benefits the mobile terminal in terms of transmit power efficiency and reduced cost of the power amplifier .
Read moreWhat is the advantage of FDMA over TDMA and FDMA?
Benefits or advantages of OFDMA Hence OFDMA makes efficient use of frequency allocations in comparison to FDMA and OFDM. ➨It provides multi-user diversity. This is due to the fact that OFDMA allows different users to transmit over different parts of the frequency spectrum known as traffic channel.
Read moreWhy we are using SC-FDMA in LTE uplink instead of OFDMA?
The performance of SC-FDMA in relation to OFDMA has been the subject of various studies. Although the performance gap is small, SC-FDMA’s advantage of low PAPR makes it desirable for uplink wireless transmission in mobile communication systems, where transmitter power efficiency is of paramount importance .
Read moreWhy OFDMA used in downlink and SC-FDMA for uplink?
OFDMA is used on the downling, but since it presents a high Peak-to-average Power Ratio it is not possible to use it on the uplink . For the uplink SC-FDMA will be used.
Read moreWhich modulation technique is used in LTE for uplink transmission?
While LTE’s downlink uses OFDM, the uplink uses a different modulation scheme known as single-carrier frequency-division multiplexing (SC-FDMA) . OFDM signals have a high peak to average power ratio (PAPR), requiring a linear power amplifier with overall low efficiency.
Read moreWhat is the purpose of using SC-FDMA?
The main objective of SC-FDMA is to introduce transmission with lower PAPR than OFDMA .
Read moreWhy SC-FDMA is used in uplink?
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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