Reduction of amplitude clipping level with OFDM/TDM

Haris Gacanin, Shinsuke Takaoka, Fumiyuki Adachi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


The OFDM signals have a problem of high peak-to-average power ratio (PAPR). Hence, a large transmit-power backoff or amplitude clipping is required. The amplitude clipping causes signal degradation and the BER performance increases. A trade-off between the PAPR reduction and the BER performance is present; the PAPR reduces as the level of clipping reduces, but the BER degrades due to signal distortion. Recently, we proposed OFDM combined with time division multiplexing (OFDM/TDM) to alleviate the high PAPR problem, while achieving better BER performance than OFDM. In this paper, a theoretical bit error rate (BER) analysis of clipped OFDM/TDM system in a frequency-selective fading channel is developed. The average BER performance is evaluated by numerical computation using the derived conditional BER and by computer simulation. It is shown that OFDM/TDM can significantly reduce the amplitude clipping level and the required average signal energy per bit-to-AWGN power spectrum density ratio Eb/N0 for the given BER in comparison to conventional OFDM.

Original languageEnglish
Title of host publication2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Number of pages5
Publication statusPublished - 2006
Externally publishedYes
Event2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall - Montreal, QC, Canada
Duration: 2006 Sep 252006 Sep 28

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252


Other2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
CityMontreal, QC


  • Clipping
  • Component
  • Nonliner degradation
  • OFDM
  • TDM
  • Theoretical BER

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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