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Your search keyword '"Odd-DFT"' showing total 3 results
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3 results on '"Odd-DFT"'

1. On the Odd-DFT and Its Applications to DCT/IDCT Computation.

Author

Mansour, Mohamed F.

Subjects
*ALGORITHMS, *FOURIER transforms, *FOURIER analysis, *EIGENVECTORS, *MATRICES (Mathematics)
Abstract

In this correspondence, efficient algorithms are presented for simultaneous calculation of the odd discrete Fourier transform (odd-DFT) and the real DFT. These algorithms are used to derive a new algorithm to calculate the discrete cosine transform (DCT) that is computationally equivalent to the classical fast Fourier transform (FFT)-based algorithm for DCT calculation [6]. In addition, odd-DFT properties are exploited to develop a novel algorithm for an inverse discrete cosine transform (IDCT) calculation that outperforms previous FFT-based solutions for IDCT calculation. [ABSTRACT FROM AUTHOR]

Published
2006
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2. Transmit Diversity Scheme for OFDM Systems Using the Odd DFT

Author

S.J. Flores, Amparo Girona, J. Marin-Roig, and Vicenc Almenar

Subjects
Scheme (programming language), Computer Networks and Communications, Orthogonal frequency-division multiplexing, Computer science, Data_CODINGANDINFORMATIONTHEORY, Topology, Channel models, Discrete Fourier transform, Odd discrete fourier transforms, TECNOLOGIA ELECTRONICA, TEORIA DE LA SEÑAL Y COMUNICACIONES, Transmissions, Electrical and Electronic Engineering, computer.programming_language, OFDM, Orthogonal frequency division multiplexing, Frequency diversity, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Telecommunication systems, Transmit diversity scheme, Diversity gain, Indoor channel model, Discrete Fourier transforms, Transmit data, Transmit diversity, OFDM systems, Odd-DFT, Transmission (telecommunications), Transmission of data, Telecommunications, business, computer, Software, Transmission schemes, Diversity scheme
Abstract

[EN] A new transmission scheme for OFDM systems that uses the odd discrete Fourier transform to provide frequency diversity gain is proposed. Odd DFT allows the transmission of data subcarriers in frequencies that are centred between those employed by the traditional DFT. This fact is exploited to transmit data subcarriers on the group of frequencies that gives better performance using either traditional DFT or odd DFT. As an example, by using this approach a diversity gain up to 5.3 dB at a BER of 10-4 in a typical indoor channel model can be achieved. © 2011 The Institute of Electronics, Information and Communication Engineers., This work was supported by the Spanish Ministerio de Ciencia e Innovacion under grant TEC2008-06787.

Published
2011

3. Transmit Diversity Scheme for OFDM Systems Using the Odd DFT

Author

Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Ministerio de Ciencia e Innovación, Almenar Terré, Vicenç, Girona, Amparo, Flores Asenjo, Santiago J., Marín-Roig Ramón, José, Universitat Politècnica de València. Departamento de Comunicaciones - Departament de Comunicacions, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Ministerio de Ciencia e Innovación, Almenar Terré, Vicenç, Girona, Amparo, Flores Asenjo, Santiago J., and Marín-Roig Ramón, José

Abstract

[EN] A new transmission scheme for OFDM systems that uses the odd discrete Fourier transform to provide frequency diversity gain is proposed. Odd DFT allows the transmission of data subcarriers in frequencies that are centred between those employed by the traditional DFT. This fact is exploited to transmit data subcarriers on the group of frequencies that gives better performance using either traditional DFT or odd DFT. As an example, by using this approach a diversity gain up to 5.3 dB at a BER of 10-4 in a typical indoor channel model can be achieved. © 2011 The Institute of Electronics, Information and Communication Engineers.

Published
2011

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