Selected mapping without side information for PAPR reduction in OFDM
IEEE Transactions on Wireless Communications
Blind detection of partial transmit sequence in a coded OFDM system
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Comparison of selected mapping and partial transmit sequence for crest factor reduction in OFDM
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Selected mapping with symbol re-mapping for OFDM/TDM using MMSE-FDE
Wireless Communications & Mobile Computing
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Orthogonal frequency division multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels. However, the price paid for the high spectral efficiency is low power efficiency. OFDM signals suffer from high peak-to-average power ratios (PARs) which lead to power inefficiency in the RF portion of the transmitter. Selected mapping (SLM) is a promising technique to reduce the PAR of an OFDM signal and is distortionless. In this paper, we propose a novel technique which links the index of the phase rotation sequence in SLM to the location of the pilot tones that are used to estimate the channel. Each pilot tone location - phase sequence selection can lead to a different PAR value for the time-domain OFDM signal, and the signal with the lowest PAR value is transmitted. Our proposed method is "blind" in the sense that the optimum pilot tone location - phase sequence index is not transmitted as side information. We describe a novel technique to blindly detect the optimum index at the receiver. PAR reduction performance as well as BER performance of the proposed method in frequency selective fading channels are investigated