Sc-fdma In The Lte

Hello friend!

The main advantage of SC-FDMA is low PAPR compare to OFDMA used in LTE downlink. This increases the efficiency of power amplifier and hence increases the battery life.

Thanks!

Hello,

OFDM forms the basic signal format used within 4G LTE. OFDM, Orthogonal Frequency Division Multiplex is the basic format used and this is modified to provide the multiple access scheme: OFDMA, orthogonal frequency division multiple access in the downlink and SC-FDMA, single channel orthogonal frequency division multiple access in the uplink.

Using multiple carriers, each carrying a low data rate, OFDM is ideal for high speed data transmission because it provides resilience against narrow band fading that occurs as a result of reflections and the general propagation properties at these frequencies.

Within the basic LTE OFDM signal format a variety of modulation formats are used including PSK and QAM. Higher order modulation is used to achieve the higher data rates: the modulation order being determined by the signal quality.

Thanks