Analysis and power diversity-based cancellation of nonlinear distortions in OFDM systems

Abstract : One of the main drawbacks of orthogonal frequency division multiplexing (OFDM) systems is the high peak-to-average power ratio (PAPR) of the transmitted signals, which can cause the introduction of inter-carrier interference (ICI) due to the presence of nonlinear power amplifiers (PAs). In this paper, a theoretical analysis of ICI in nonlinear OFDM systems with polynomial PAs is made. Contrarily to other works, this analysis provides an exact description of nonlinear ICI. Moreover, three receivers for channel estimation and ICI cancellation in OFDM systems with polynomial PAs are proposed, based on the concept of power diversity that consists in re-transmitting the information symbols several times with a different transmission power each time. The transmission powers that minimize the sum of the residual mean square errors (MSEs) provided by the proposed receivers are derived in the case of a third-degree polynomial PA. An important advantage of the proposed receivers is that the optimal transmission powers do not depend on the channel nor the PA coefficients.
Liste complète des métadonnées

Cited literature [37 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00718626
Contributor : Gérard Favier <>
Submitted on : Tuesday, July 17, 2012 - 5:00:34 PM
Last modification on : Monday, November 5, 2018 - 3:52:01 PM
Document(s) archivé(s) le : Friday, December 16, 2016 - 12:31:38 AM

File

IEEE_TSP_July_2012.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-00718626, version 1

Collections

Citation

Carlos Alexandre Rolim Fernandes, João Mota, Gérard Favier. Analysis and power diversity-based cancellation of nonlinear distortions in OFDM systems. IEEE Transactions on Signal Processing, Institute of Electrical and Electronics Engineers, 2012, 60 (7), pp.3520-3531. ⟨hal-00718626⟩

Share

Metrics

Record views

247

Files downloads

242