Single Carrier FDMA Modulation Scheme

Single Carrier Frequency Division Multiple Access (SC-FDMA) is an alternative modulation scheme to Orthogonal Frequency Division Multiple Access (OFDMA) employed in the uplink Long Term Evolution (LTE) cellular wireless communications systems. The SC-FDMA has similar performance and essentially the same overall complexity as OFDMA system. The OFDMA waveform exhibits a high Peak-to-Average Power Ratio (PAPR), requiring the power amplifier to operate with a large back-off from their peak power. This results in the power amplifier to operate with low efficiency and places a significant burden on battery-limited mobile handsets.