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SC-FDMA tutorial

Does LTE use FDMA?

1 April 2022 Enpatika.com Genel

As a result, LTE uses a modulation scheme known as SC-FDMA – Single Carrier Frequency Division Multiplex which is a hybrid format.

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Which path used SC-FDMA in LTE?

1 April 2022 Enpatika.com Genel

SC-FDMA is widely used in LTE subscriber terminals in the transmit path and variant OFDMA is used in the eNodeB downlink(or receive path of LTE subscriber).

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Why SC-FDMA is used in LTE?

1 April 2022 Enpatika.com Genel

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.17 Şub 2020

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Why we are using SC-FDMA in LTE uplink instead of OFDMA?

1 April 2022 Enpatika.com Genel

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 .

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Why OFDMA used in downlink and SC-FDMA for uplink?

1 April 2022 Enpatika.com Genel

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.

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Which modulation technique is used in LTE for uplink transmission?

1 April 2022 Enpatika.com Genel

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.

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