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ZTE Communications ›› 2011, Vol. 9 ›› Issue (1): 45-48.

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ZP-CI/OFDM: A Power Efficient Wireless Transmission Technology

Pei Gao, Xiaohu Chen, and Jun Wang   

  1. National Key Laboratory of Science and Technology on Communications, the University of Electronic Science and Technology of China
  • 出版日期:2011-03-25 发布日期:2011-03-25
  • 作者简介:Pei Gao (gaopei@uestc.edu.cn) is working towards an M.S. degree at the National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China. His research interest is signal processing technologies for wireless communications. He has participated in three funded projects, published two papers indexed by EI, and has applied for one Chinese patent.

    Xiaohu Chen (cxh4389@163.com) is working towards an M.S. degree at the National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China. His research interests include signal processing technologies and waveform design for wireless communications. He has participated in three funded projects and applied for one Chinese patent.

    Jun Wang (junwang@uestc.edu.cn) is an associate professor at the National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China. His research interest is signal processing technologies for wireless communications. He has participated in eight funded projects, published 60 papers indexed by SCI/EI, and applied for eight Chinese patents.
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China under Grant No. 61071102.

ZP-CI/OFDM: A Power Efficient Wireless Transmission Technology

Pei Gao, Xiaohu Chen, and Jun Wang   

  1. National Key Laboratory of Science and Technology on Communications, the University of Electronic Science and Technology of China
  • Online:2011-03-25 Published:2011-03-25
  • About author:Pei Gao (gaopei@uestc.edu.cn) is working towards an M.S. degree at the National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China. His research interest is signal processing technologies for wireless communications. He has participated in three funded projects, published two papers indexed by EI, and has applied for one Chinese patent.

    Xiaohu Chen (cxh4389@163.com) is working towards an M.S. degree at the National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China. His research interests include signal processing technologies and waveform design for wireless communications. He has participated in three funded projects and applied for one Chinese patent.

    Jun Wang (junwang@uestc.edu.cn) is an associate professor at the National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China. His research interest is signal processing technologies for wireless communications. He has participated in eight funded projects, published 60 papers indexed by SCI/EI, and applied for eight Chinese patents.
  • Supported by:
    This work is supported by the National Natural Science Foundation of China under Grant No. 61071102.

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摘要： Low power efficiency is a deficiency in traditional Orthogonal Frequency Division Multiplexing (OFDM) systems. To counter this problem, a new wireless transmission technology based on Zero-Padding Carrier Interferometry OFDM (ZP-CI/OFDM) is proposed. In a ZP-CI/OFDM system, transmission symbols are spread to all OFDM subcarriers via carrier interferometry codes. This reduces the Peak-to-Average Power Ratio (PAPR) that traditional OFDM suffers and also exploits frequency diversity gain. By zero-padding at the transmitter, advanced receiver technologies can be adopted for ZP-CI/OFDM so that frequency diversity gain can be further utilized and the power efficiency of the system is improved.

关键词: power efficiency, carrier interferometry, orthogonal frequency division multiplex, zero-padding, frequency diversity gain

Abstract: Low power efficiency is a deficiency in traditional Orthogonal Frequency Division Multiplexing (OFDM) systems. To counter this problem, a new wireless transmission technology based on Zero-Padding Carrier Interferometry OFDM (ZP-CI/OFDM) is proposed. In a ZP-CI/OFDM system, transmission symbols are spread to all OFDM subcarriers via carrier interferometry codes. This reduces the Peak-to-Average Power Ratio (PAPR) that traditional OFDM suffers and also exploits frequency diversity gain. By zero-padding at the transmitter, advanced receiver technologies can be adopted for ZP-CI/OFDM so that frequency diversity gain can be further utilized and the power efficiency of the system is improved.

Key words: power efficiency, carrier interferometry, orthogonal frequency division multiplex, zero-padding, frequency diversity gain