SC-FDMA is a hybrid modulation scheme that combines the low peak-to-average ratio (PAR) of traditional single-carrier formats such as GSM with the multipath resistance and in-channel frequency scheduling flexibility of orthogonal frequency-division multiplexing (OFDM). Acronyms galore: LTE history and context.
Read moreWhat is the advantage of OFDMA over conventional FDMA?
SC- FDMA has a lower PAPR and lower sensitivity to carrier frequency errors while OFDMA provides better frequency diversity resulting in better immunity against multipath fading .
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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