On the use of discrete cosine transforms for multicarrier communications

Cruz Roldán, Fernando and Domínguez Jiménez, María Elena and Sansigre Vidal, Gabriela and Amo Lopez, Pedro and Blanco Velasco, Manuel and Bravo Santos, Ángel (2012). On the use of discrete cosine transforms for multicarrier communications. "IEEE Transactions on Signal Processing", v. 60 (n. 11); pp. 6085-6090. ISSN 1053-587X. https://doi.org/10.1109/TSP.2012.2210714.

Description

Title: On the use of discrete cosine transforms for multicarrier communications
Author/s:
  • Cruz Roldán, Fernando
  • Domínguez Jiménez, María Elena
  • Sansigre Vidal, Gabriela
  • Amo Lopez, Pedro
  • Blanco Velasco, Manuel
  • Bravo Santos, Ángel
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Signal Processing
Date: November 2012
ISSN: 1053-587X
Volume: 60
Subjects:
Freetext Keywords: Carrier-frequency offset (CFO), discrete cosine transform (DCT), discrete multitone modulation (DMT), multicarrier modulation (MCM), multicarrier transceiver, orthogonal frequency-division multi-plexing (OFDM).
Faculty: E.T.S.I. Industriales (UPM)
Department: Matemática Aplicada a la Ingeniería Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this correspondence, the conditions to use any kind of discrete cosine transform (DCT) for multicarrier data transmission are derived. The symmetric convolution-multiplication property of each DCT implies that when symmetric convolution is performed in the time domain, an element-by-element multiplication is performed in the corresponding discrete trigonometric domain. Therefore, appending symmetric redun-dancy (as prefix and suffix) into each data symbol to be transmitted, and also enforcing symmetry for the equivalent channel impulse response, the linear convolution performed in the transmission channel becomes a symmetric convolution in those samples of interest. Furthermore, the channel equalization can be carried out by means of a bank of scalars in the corresponding discrete cosine transform domain. The expressions for obtaining the value of each scalar corresponding to these one-tap per subcarrier equalizers are presented. This study is completed with several computer simulations in mobile broadband wireless communication scenarios, considering the presence of carrier frequency offset (CFO). The obtained results indicate that the proposed systems outperform the standardized ones based on the DFT.

More information

Item ID: 16055
DC Identifier: http://oa.upm.es/16055/
OAI Identifier: oai:oa.upm.es:16055
DOI: 10.1109/TSP.2012.2210714
Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=06252068
Deposited by: Memoria Investigacion
Deposited on: 09 Jul 2013 11:41
Last Modified: 21 Apr 2016 16:24
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