2nd International ICST Conference on Communications and Networking in China

Research Article

Selected Mapping in Correlatively Coded OFDM

  • @INPROCEEDINGS{10.1109/CHINACOM.2007.4469583,
        author={Xun  Yang and Jian  Wang and Daoben  Li},
        title={Selected Mapping in Correlatively Coded OFDM},
        proceedings={2nd International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2008},
        month={3},
        keywords={Distortion  Filtering  Frequency division multiplexing  Information processing  Laboratories  OFDM modulation  Partial transmit sequences  Peak to average power ratio  Pulse amplifiers  Robustness},
        doi={10.1109/CHINACOM.2007.4469583}
    }
    
  • Xun Yang
    Jian Wang
    Daoben Li
    Year: 2008
    Selected Mapping in Correlatively Coded OFDM
    CHINACOM
    IEEE
    DOI: 10.1109/CHINACOM.2007.4469583
Xun Yang1, Jian Wang1, Daoben Li1
  • 1: School of Information Engineering, Key Laboratory of Information Processing and Intelligent Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China

Abstract

The peak-to-average raito (PAPR) in correlatively coded orthogonal frequency-division multiplexing (OFDM) system is studied. Correlative codes are proposed by large numbers of papers to significantly improve the spectral performance of OFDM with rectangular pulse. The large PAPR makes amplifier distort the signal before transmission and thus becomes one of the most serious drawbacks of OFDM. However, simulations illustrate that correlatively coded OFDM has much larger PAPR than uncoded OFDM. This makes its implementation very difficult. Selected mapping (SLM) is a promising PAPR reduction technique, which is distortionless and has good PAPR reducing performance. We use SLM to reduce the PAPR of correlatively coded OFDM, and prove that the very high spectral efficiency is not affected by the PAPR reduction. Simulations show that SLM can lower the PAPR of correlatively code OFDM efficiently without any loss of the spectral performance.