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J Electromagn Eng Sci > Volume 7(4); 2007 > Article
Journal of the Korean Institute of Electromagnetic and Science 2007;7(4):169-174.
DOI: https://doi.org/10.5515/JKIEES.2007.7.4.169   
An Orthogonal Phase-Superimposed Peak-to-Average Power Ratio Reduction Technique
Tae-Young Han1, Nam Kim1, Jung-Hun Choi1, Jae-Hwan Lee2
1Department of Information and Communication Engineering, Chungbuk National University
2IT R&D Performance Coordination Division, Institute for Information Technology Advancement
Abstract
This paper presents a method of superimposing the rotation phases over the pilot and data symbols in order to reduce the peak-to-average power ratio(PAPR) in orthogonal frequency division multiplexing(OFDM). The phases of the rotation vector are added to those of the pilot symbols and those of the data symbols by interlaying them between any two pilot symbols. The receiver restores the data symbols by utilizing the channel estimation of the pilot symbols. Therefore, the bandwidth efficiency is improved by not using the subcarriers that are assigned for the reduction of the PAPR. Also, the enormous increase of the bit error rate which would be caused by incorrectly receiving the side information, i.e. the phases of the rotation vector, is prevented. The simulation results of the bit error rate performance for the BPSK are given using the COST-207 channel model.
Key words: OFDM, PAPR, Channel Estimation, PTS
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