An effective constellation extension method for PAPR reduction in OFDM system

Projection onto Convex Sets (POCS) and Smart Gradient Project (SGP) method to Active Constellation Extension (ACE) are proposed in this paper. The Peak-to-average ratio in Orthogonal Frequency Division Multiplexing (OFDM) system can be reduced through the constellation extension. The experimental results have shown that the proposed method is feasible and effective.