Title page for etd-0810108-154951


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URN etd-0810108-154951
Author Jia-Cheng Xie
Author's Email Address m943070011@student.nsysu.edu.tw
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Department Communications Engineering
Year 2007
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Novel Low-Complexity SLM Schemes for PAPR Reduction in OFDMA Uplink Systems
Date of Defense 2008-07-29
Page Count 63
Keyword
  • Orthogonal Frequency-Division Multiple Access
  • Selective Mapping
  • Conversion Vector
  • Peak-to Average Power Ratio
  • Abstract One of the major drawbacks of multi-carrier systems is the high peak-to-average power ratio (PAPR) of the transmitted signals. In this paper, the proposed novel low-complexity selective mapping (SLM) schemes are applicable to interleaved-4 orthogonal frequency division multiple access (OFDMA) uplink systems for PAPR reduction. The novel scheme just needs one inverse fast Fourier transform (IFFT) block because that the phases of the transmitted signals in frequency domain are rotated by circular convolution with conversion vectors in time domain. Moreover, a special set of conversion vectors are proposed in novel scheme, which are not only computed with low complexity but also reduce the PAPR effectively. In proposed scheme, different conversion vectors and appropriate subcarriers mapping are picked up for different users. The scheme supplies a practicable low-complexity method for PAPR reduction in interleaved-4 OFDMA uplink systems. Besides, the bit error rate (BER) performance is as good as the SLM scheme.
    Advisory Committee
  • Jyh-Horng Wen - chair
  • Tsang-Yi Wang - co-chair
  • Shyue-Win Wei - co-chair
  • Chih-Peng Li - advisor
  • Files
  • etd-0810108-154951.pdf
  • indicate in-campus access in a year and off_campus not accessible
    Date of Submission 2008-08-10

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