Combined Reduction of Peak-to-Average Power Ratio and Average Transmit Power in Unique-Word OFDM via Selected Mapping

Jakob Rettelbach^* and Johannes Huber

Selected Mapping (SLM) is a powerful tool for shaping a signal to improve certain features like the peak-to-average power ratio (PAPR). To do so, SLM generates different signal candidates by a bijective mapping and selecting the candidate that fulfills the desired characteristic. In previous works, it has been shown that SLM can be used to shape signal features of Unique-Word OFDM. In detail, SLM was used to reduce the average PAPR and the average transmit power by diminishing the energy in the redundant subcarriers. In this work, we will focus on a combined reduction: Both, the PAPR and the average transmit power are jointly reduced. A selection criterion for SLM, that incorporates both features is introduced. Finally the correlations between the PAPR and the energy in the redundant subcarriers is analysed.

Mathematics Subject Classification: 94A12

Keywords: OFDM; PAPR; Peak-to-Average Power Ratio; Selected Mapping; Unique Word

Minisymposion: Unique Word OFDM