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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (2 ): 5-    DOI: 10.1631/jzus.2006.A0135
    
Time-domain clustered transmit power adaptation for OFDM system in fading channels
Gan Xiao-ying, Xu You-yun, Guan Yun-feng, Song Wen-tao
Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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Abstract  This paper proposes a time-domain clustered transmitter power adaptation scheme for orthogonal frequency division multiplexing (OFDM) system, which can significantly reduce the feedback amount during power adaptation comparison with conventional frequency-domain adaptation schemes. It was found that the cluster size plays an important role on the adaptation performance, especially for the vehicular environment. Simulation results showed that using Lagrange interpolation to obtain an explicit curve of Doppler frequency vs cluster size yields good trade-off between the resulted bit error rate (BER) and the amount of feedback.

Key words： Power adaptation      Orthogonal frequency division multiplexing (OFDM)      Time-domain cluster      Coherence time     
Received: 23 June 2005     
CLC:  TN92  
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Gan Xiao-ying
Xu You-yun
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Song Wen-tao
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Gan Xiao-ying, Xu You-yun, Guan Yun-feng, Song Wen-tao. Time-domain clustered transmit power adaptation for OFDM system in fading channels. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(2 ): 5-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.A0135     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/I2 /5

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