PAPR and Spectral Control Procedure for OFDM Wireless Systems Using CAZAC Equalization

摘要

A major drawback of Orthogonal Frequency Division Multiplexing (OFDM) signals is extremely high Peak-to-Average Power Ratio (PAPR). The CAZAC equalization scheme makes the PAPR of M-array Quadrature Amplitude Modulation (M-QAM) OFDM signals into the PAPR of M-QAM single-carrier signals. Therefore, it dramatically improves the PAPR of OFDM signals. However, severe bandpass filtering of CAZAC-OFDM signal lead to unacceptable degradation of the PAPR. The paper provides available control procedure for PAPR and spectrum managements. It is confirmed that the CAZAC-OFDM signal controlled by our procedure maintains enough low PAPR and can clear the spectrum mask specifications in IEEE802.11 standard.