A low-complexity PTS-based PAPR reduction technique for OFDM signals without transmission of side information

Partial Transmit Sequence (PTS) is an efficient Peak-to-Average Power Ratio (PAPR) reduction technique for Orthogonal Frequency Division Multiplexing (OFDM) signals. This paper proposes a new PTS-based PAPR reduction technique of marginal complexity and its VLSI implementation aspects. The proposed technique does not require the explicit transmission of side information as required in conventional PTS implementations. The proposed decoder uses the predefined values of pilot tones and explores all the permissible combinations of weighting factors in order to identify the factor combination that has been selected and used by the transmitter. The proposed decoder requires no additional pilot tones, therefore no data rate loss is implied. Subsequently this paper presents a digital implementation of the proposed PTS decoder and demonstrates its low power properties, as well as the architecture and VLSI implementation of the encoder required at the transmitter for the application of the proposed scheme.