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Peak to mean envelope power ratio of oversampled OFDM signals: An analytical approach

Sharif, M ; Sharif University of Technology | 2001

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  1. Type of Document: Article
  2. Publisher: 2001
  3. Abstract:
  4. Orthogonal frequency division multiplexing (OFDM) has a large peak to mean envelope power ratio (PMEPR), which can result in significant signal distortion in presence of nonlinear amplifiers. In this paper, we will show that peak of the continuous envelope of OFDM signal can be bounded by maximum of corresponding oversampled sequence. This fact is then used as the corner stone of our study in two parts. In the first part, statistical analysis is used to find probability upper bound for complementary cumulative distribution function of PMEPR. It is also proven that for large number of subcarriers, only one redundant bit is necessary to limit PMEPR within %10 of its maximum value. In the second part, PMEPR estimation using oversampling and fast Fourier transform is revisited [1]. Here, we will introduce a novel measure on estimation error using oversampled OFDM signal
  5. Keywords:
  6. OFDM ; Statistical analysis ; Power amplifiers ; Frequency estimation ; Nonlinear distortion ; Frequency division multiplexing ; Distribution functions ; Estimation error ; Upper bound ; Signal analysis
  7. Source: International Conference on Communications (ICC2001), Helsinki, 11 June 2000 through 14 June 2000 ; Volume 5 , 2001 , Pages 1476-1480 ; 05361486 (ISSN)
  8. URL: https://ieeexplore.ieee.org/document/937166