In this paper, two selected mapping (SLM)-based schemes are proposed to reduce the peak-to-average power ratio (PAPR) in the orthogonal frequency division multiplexing (OFDM) systems. One is SLM-based partial data circulation (PDC) scheme. The other is SLM-based. PDC with hamming coded side information (SI) scheme. In the PDC scheme, the partial samples within the data sequence are scrambled by circularly shifting to obtain a set of candidate sequences and, then, each sequence is combined with the corresponding SI to form the candidate OFDM symbol. With the selection of the candidate OFDM symbols with the lowest PAPR, the PAPR of the transmitted signal could be greatly reduced. In the other scheme, hamming code is used to protect the SI to improve the system performance. Simulation results show that the proposed method could reduce PAPR and it has a better bandwidth efficiency and less modules of inverse fast Fourier transform than that with the SLM-based dummy sequence insertion scheme. Copyright ? 2008 John Wiley & Sons, Ltd.
Relation:
International Journal of Communication Systems 22 (1) , pp. 87-100
