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Subchannel Power Control in the OFDM System to Improve BER Performance under Multipath Channels

Hongku KANG, Wooncheol HWANG, Kiseon KIM

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Summary :

We propose a subchannel power control scheme in the OFDM system, which transmits data with a variable power level for each subchannel based on the received SNR. The OFDM system, employing the D-QPSK modulation and the proposed subchannel power control with a grouping coefficient equal to 3, gives about 2.3 dB gain in Eb/N0 comparing with the conventional OFDM system, under the two-ray multipath channel with the mean value of the second-ray's attenuation coefficient equal to 0.25, for the required BER equal to 10-5.

Publication
IEICE TRANSACTIONS on Communications Vol.E85-B No.5 pp.902-907
Publication Date
2002/05/01
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Wireless Communications Issue)
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