Post-IFFT-Modified Selected Mapping to Reduce the PAPR of an OFDM System

Montadar Abas Taher, Mandeep Jit Singh, Mahamod Ismail, Salina Abdul Samad, M. T. Islam, Hussain Falih Mahdi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Orthogonal frequency-division multiplexing is now one of the most important modulation techniques due to its advantages. Despite its ability to overcome the equalization problem, multipath fading channels, and other issues, this system has a serious problem concerning the high output peaks with respect to the average power, which is called the peak-to-average power ratio (PAPR). Selected mapping (SLM), partial transmitted sequence, and amplitude clipping and filtering are some efficient methods to reduce the PAPR. In a previous work, we slid a single-phase rotation vector on the data sequence in the frequency domain to reduce the PAPR and the complexity compared to the conventional SLM. In this paper, we present a novel method that utilizes the same approach of our previous work, but it processes the data after the inverse fast Fourier transform block (time-domain operations) using a modified version of the SLM scheme, which has less computational complexity than the conventional one. The mathematical derivations and the simulation results show that the PAPR, the computational complexity, and the side information were reduced significantly by the proposed method.

Original languageEnglish
Pages (from-to)535-555
Number of pages21
JournalCircuits, Systems, and Signal Processing
Volume34
Issue number2
DOIs
Publication statusPublished - 2014

Fingerprint

Peak-to-average Power Ratio (PAPR)
Orthogonal Frequency Division multiplexing (OFDM)
Orthogonal frequency division multiplexing
Computational complexity
Computational Complexity
Multipath fading
Clipping
Fast Fourier transforms
Fading channels
Side Information
Equalization
Fast Fourier transform
Multipath
Fading Channels
Modulation
Frequency Domain
Time Domain
Filtering
Partial
Output

Keywords

  • Complexity reduction
  • OFDM
  • PAPR
  • Post IFFT
  • SLM

ASJC Scopus subject areas

  • Signal Processing
  • Applied Mathematics

Cite this

Post-IFFT-Modified Selected Mapping to Reduce the PAPR of an OFDM System. / Taher, Montadar Abas; Singh, Mandeep Jit; Ismail, Mahamod; Samad, Salina Abdul; Islam, M. T.; Mahdi, Hussain Falih.

In: Circuits, Systems, and Signal Processing, Vol. 34, No. 2, 2014, p. 535-555.

Research output: Contribution to journalArticle

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