Improving Effectiveness of the Active Constellation Extension Method for PAPR Reduction in Generalized Multicarrier Signals

摘要

In this paper, the Active Constellation Extension (ACE) method of Peak-to-Average Power Ratio (PAPR) reduction is studied for the application in Generalized Mulicarrier (GMC) transmission using nonorthogonal subcarriers. It is shown, that GMC signaling is advantageous for modern wireless communications due to its high spectral efficiency, however, it faces even higher PAPR than in the case of the conventional Orthogonal Frequency Division Multiplexing (OFDM) transmission. The modification of the ACE method for the GMC signals is presented, which takes into account overlapping of data symbol pulses and of their subband spectra. Further improvements of the proposed method are suggested that lead to the decrease of the computational complexity and to more efficacious PAPR reduction in comparison with the conventional ACE scheme. With these improvements, the PAPR reduction for the GMC signaling is the same as for OFDM.