IEICE TRANSACTIONS on Communications
Low Complexity FFT Schemes for Multicarrier Demodulation in OFDMA Systems
Summary :
In OFDMA systems, various subcarrier allocation (SA) algorithms have been developed and adopted to realize the low-cost implementation or the optimized usage of resources, such as bandwidth and total transmit power, at the cost of increased complexity. Regardless of SA algorithms, however, it is computationally inefficient for a user who uses only a small number of subcarriers to use a full fast Fourier transform (FFT) for multicarrier demodulation at a conventional receiver in a downlink environment. In response, this letter proposes a novel low complexity FFT scheme that demodulates a set of desired multicarriers with smaller-size FFTs is proposed for computationally efficient and/or low hardware-cost receiver in OFDMA systems. Furthermore, a decision rule for the optimum size of FFT in the known transform decomposition methods is provided.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E90-B No.11 pp.3290-3293
- Publication Date
- 2007/11/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1093/ietcom/e90-b.11.3290
- Type of Manuscript
- LETTER
- Category
- Wireless Communication Technologies
Authors
Keyword
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Youngok KIM, Jaekwon KIM, "Low Complexity FFT Schemes for Multicarrier Demodulation in OFDMA Systems" in IEICE TRANSACTIONS on Communications,
vol. E90-B, no. 11, pp. 3290-3293, November 2007, doi: 10.1093/ietcom/e90-b.11.3290.
Abstract: In OFDMA systems, various subcarrier allocation (SA) algorithms have been developed and adopted to realize the low-cost implementation or the optimized usage of resources, such as bandwidth and total transmit power, at the cost of increased complexity. Regardless of SA algorithms, however, it is computationally inefficient for a user who uses only a small number of subcarriers to use a full fast Fourier transform (FFT) for multicarrier demodulation at a conventional receiver in a downlink environment. In response, this letter proposes a novel low complexity FFT scheme that demodulates a set of desired multicarriers with smaller-size FFTs is proposed for computationally efficient and/or low hardware-cost receiver in OFDMA systems. Furthermore, a decision rule for the optimum size of FFT in the known transform decomposition methods is provided.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.11.3290/_p
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@ARTICLE{e90-b_11_3290,
author={Youngok KIM, Jaekwon KIM, },
journal={IEICE TRANSACTIONS on Communications},
title={Low Complexity FFT Schemes for Multicarrier Demodulation in OFDMA Systems},
year={2007},
volume={E90-B},
number={11},
pages={3290-3293},
abstract={In OFDMA systems, various subcarrier allocation (SA) algorithms have been developed and adopted to realize the low-cost implementation or the optimized usage of resources, such as bandwidth and total transmit power, at the cost of increased complexity. Regardless of SA algorithms, however, it is computationally inefficient for a user who uses only a small number of subcarriers to use a full fast Fourier transform (FFT) for multicarrier demodulation at a conventional receiver in a downlink environment. In response, this letter proposes a novel low complexity FFT scheme that demodulates a set of desired multicarriers with smaller-size FFTs is proposed for computationally efficient and/or low hardware-cost receiver in OFDMA systems. Furthermore, a decision rule for the optimum size of FFT in the known transform decomposition methods is provided.},
keywords={},
doi={10.1093/ietcom/e90-b.11.3290},
ISSN={1745-1345},
month={November},}
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TY - JOUR
TI - Low Complexity FFT Schemes for Multicarrier Demodulation in OFDMA Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 3290
EP - 3293
AU - Youngok KIM
AU - Jaekwon KIM
PY - 2007
DO - 10.1093/ietcom/e90-b.11.3290
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2007
AB - In OFDMA systems, various subcarrier allocation (SA) algorithms have been developed and adopted to realize the low-cost implementation or the optimized usage of resources, such as bandwidth and total transmit power, at the cost of increased complexity. Regardless of SA algorithms, however, it is computationally inefficient for a user who uses only a small number of subcarriers to use a full fast Fourier transform (FFT) for multicarrier demodulation at a conventional receiver in a downlink environment. In response, this letter proposes a novel low complexity FFT scheme that demodulates a set of desired multicarriers with smaller-size FFTs is proposed for computationally efficient and/or low hardware-cost receiver in OFDMA systems. Furthermore, a decision rule for the optimum size of FFT in the known transform decomposition methods is provided.
ER -
English
