PAPR control of OFDM signals using spinal codes

Orthogonal Frequency Division Multiplexing (OFDM) produces higher peak-to-average power ratio (PAPR) than single carrier modulation because of the superposition of subcarrier signals. The high PAPR causes the amplitude distortion on OFDM signals of the output at high power amplifier. The distortion degrades the transmission efficiency and bit error rate. In this paper, spinal codes are introduced for PAPR control system of OFDM. In this system, PAPR can be reduced by two steps of partial transmit sequence (PTS) and spinal codes. PTS reduces PAPR by phase rotation of multiple clusters and spinal codes can control by puncturing high PAPR symbols which exceed the threshold.