Improved SLM algorithm for PAPR reduction in OFDM system |
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Authors: | Ce JI Wenjing ZHU Ying WEI Dianxia JIA |
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Affiliation: | 1. School of Computer Science and Engineering,Northeastern University,Shenyang 110169,China;2. College of Information Science and Engineering,Northeastern University,Shenyang 110004,China |
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Abstract: | In order to reduce the peak to average power ratio (PAPR) of the conventional selective mapping (SLM) algorithm,decrease the transmission of side-band information,and improve the spectral efficiency in the orthogonal frequency division multiplexing (OFDM) system,the TL-SLM algorithm based on the conversion matrix and the chaotic sequence was proposed firstly.Although the TL-SLM algorithm could effectively decrease the transmission of side-band information,the reduction of PA P R was limited.To solve this problem,an improved TL-SLM algorithm based on the rotation vector was proposed,which was the TR-SLM algorithm.TR-SLM algorithm introduced the rotation vector to generate more time-domain alternative signals to further reducing the PA P R.The performance analysis shows that although the TL-SLM algorithm and the TR-SLM algorithm increase the complexity a little,the PA P R performance is effectively improved and the transmission of side-band information is greatly reduced. |
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Keywords: | orthogonal frequency division multiplexing conversion matrix chaotic sequence rotation vector |
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