Another application for trellis shaping: PAR reduction for DMT (OFDM)

Another Application for Trellis Shaping: PAR Reduction for DMT (OFDM) Werner Henkel, Member, IEEE, and Björn Wagner Abstract—A bound for the possible reduction of the peak-to-average ratio (PAR) dependent on the rate as well as possible practical procedures are presented. The idea of trellis shaping, originally used to minimize average transmit power in single-carrier systems, is applied to the problem of PAR reduction in multi-carrier transmission. Its impact, as a function of code rate, as well as design practicability is considered using metrics in both time and frequency domain.