Active point modification for sidelobe suppression with PAPR constraint in OFDM systems
In this paper, we propose an active point modification (APM) scheme to suppress the sidelobe of orthogonal frequency division multiplexing (OFDM) signals, and the key idea of APM is slightly enlarging the amplitudes of constellation points on some sub-carriers while keeping unchanged the minimum distance between constellation points. Moreover, the peak-to-average power ratio of the OFDM signal is considered. We formulate the sidelobe suppression problem by APM as a quadratically constrained quadratic programming problem, which could be solved by numerical tools. Simulation results show that APM could provide well sidelobe suppression performance while the peak-to-average power ratio could be efficiently controlled at a desired level.
sidelobe suppression ofdm active point modification (apm) peak-to-average power ratio (papr)