Low Complexity FFT Schemes for Multicarrier Demodulation in OFDMA Systems(Wireless Communication Technologies)
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概要
- 論文の詳細を見る
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.
- 社団法人電子情報通信学会の論文
- 2007-11-01
著者
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KIM Youngok
Department of ECE, University of Texas at Austin
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Kim Jaekwon
Computer And Telecommun. Engineering Division Yonsei Univ.
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Kim Jaekwon
Computer And Telecom. Engineering Division Yonsei Univ.
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Kim Youngok
Department Of Next Generation Mobile Development Of Kt Infra Laboratory
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Kim Youngok
Department Of Ece University Of Texas At Austin
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Kim Jaekwon
Computer & Telecommunications Engineering Division Yonsei University
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