OFDM PAPR Reduction Using Interior Point Method

The main problem of OFDM signaling is the high peak-to-average power ratio in time domain that limits transmitter amplifier power efficiency. In this paper we present a convex optimization algorithm for minimizing the PAR of an OFDM signal subject to bound the constellation error vector magnitude (EVM). Simulation results are based upon the 802.11a/g wireless local-area network standard. The globally minimum PAR, subject to the constellation error constraint, ranges from 0.7 dB for 6-Mbps binary-phase-shift keying to 4.1 dB for 54-Mbps 64-QAM. Hybrid Newton and IPM method has been used for optimization and the simulation results show that this algorithm is faster than optimum IPM and the main complexity is IFFT calculation and line search algorithm to find minimum point.