基于DCT的DMT系统设计与峰均功率比研究
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天津大学电子信息工程学院,天津大学电子信息工程学院,天津大学电子信息工程学院

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国家重点基础研究发展计划(973计划);国家自然科学基金项目(面上项目,重点项目,重大项目)


THE DCT-BASED DMT SYSTEM DESIGN AND PAPR ANALYSIS
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School of Electronic Information Engineering, Tianjin University,School of Electronic Information Engineering, Tianjin University,School of Electronic Information Engineering, Tianjin University

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The National Basic Research Program of China (973 Program);The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    提出一种新的基于离散余弦变换及其逆变换的离散多音调制系统(DCT-Based-DMT)实现方案,利用IDCT/DCT变换替代IFFT/FFT变换实现多载波信号的调制与解调,并对该系统的峰均功率比(PAPR)进行了理论分析。在此基础上,提出一种利用离散余弦变换能量集中特性降低系统PAPR的方法,与基于选择性映射算法的离散多音调制系统(SLM-FFT-DMT)相比,基于DCT算法的DCT-Based-DMT系统比SLM-FFT-DMT系统的PAPR低1.5dB,且具有计算法复杂度低的优点。

    Abstract:

    A new scheme based on discrete cosine transform and its inverse is proposed to realize the discrete multitone modulation (DCT-Based-DMT) system. We use the IDCT/DCT to construct the DMT system by replacing the IFFT/FFT transform to complete multi-carrier modulation, and then analyze the peak to average power ratio (PAPR) performance of the proposed system. Based on these results, an energy compressional DCT algorithm is proposed to reduce the PAPR of the DCT-Based-DMT system. The comparison with the selected mapping algorithm based DMT system (SLM-FFT-DMT) demonstrates that the proposed DCT based DMT system (DCT-Based-DMT) with DCT algorithm provides 1.5dB PAPR reduction and lower complexity.

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李鹏,侯永宏,汪清.基于DCT的DMT系统设计与峰均功率比研究[J].数据采集与处理,2012,27(2):168-148

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历史
  • 收稿日期:2011-05-16
  • 最后修改日期:2011-09-05
  • 录用日期:2011-10-25
  • 在线发布日期: 2012-11-06