Compressed sensing techniques for receiver based post-compensation of transmitter's nonlinear distortions in OFDM systems

Damilola S. Owodunni, Anum Z. Ali, Ahmed Abdul Quadeer, Ebrahim B. Al-Safadi, Oualid Hammi, Tareq Y. Al-Naffouri

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In this paper, compressed sensing techniques are proposed to linearize commercial power amplifiers driven by orthogonal frequency division multiplexing signals. The nonlinear distortion is considered as a sparse phenomenon in the time-domain, and three compressed sensing based algorithms are presented to estimate and compensate for these distortions at the receiver using a few and, at times, even no frequency-domain free carriers (i.e. pilot carriers). The first technique is a conventional compressed sensing approach, while the second incorporates a priori information about the distortions to enhance the estimation. Finally, the third technique involves an iterative data-aided algorithm that does not require any pilot carriers and hence allows the system to work at maximum bandwidth efficiency. The performances of all the proposed techniques are evaluated on a commercial power amplifier and compared. The error vector magnitude and symbol error rate results show the ability of compressed sensing to compensate for the amplifier's nonlinear distortions. © 2013 Elsevier B.V.
Original languageEnglish (US)
Pages (from-to)282-293
Number of pages12
JournalSignal Processing
Volume97
DOIs
StatePublished - Apr 2014

ASJC Scopus subject areas

  • Signal Processing
  • Software
  • Computer Vision and Pattern Recognition
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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