PAPR Reduction Using CAZAC Sequences in SC-FDMA

In this paper,a group of methods in reducing Peak to Average Power Ratio(PAPR)in 3GPP-LTE uplink Single-Carrier Frequency Division Multiple Access(SC-FDMA)using Constant Amplitude Zero Auto-Correlation Sequences(CAZAC)sequences were proposed.The authors discussed the methods of reducing PAPR using pilot sequences and detailed schemes.Then they investigated several CAZAC sequences,mainly about phase shifted sequences,such as Chu sequence,Frank sequence and Golomb sequence.They also compared the differences between various kinds of pilot sequence positions.Compared to simple binary sequences,CAZAC has a great improvement in peak power reduction.With respect to pilot sequence orders and pilot density,all three CAZAC sequences have similar performances,which is an advantage in designing SC-FDMA systems.