Power Allocation Method for OFDM System with both Total and Per-Antenna Power Constraints

In this paper, we propose an optimal power allocation method for OFDM system with both total transmit power constraint (TTPC) and per-antenna power constraint (PAPC). In contrast to traditional water-filling method, the new one takes into account of the signal distortion caused by PAPC in deducing s...

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Veröffentlicht in:IEEE communications letters 2008-09, Vol.12 (9), p.621-623
Hauptverfasser: Peng, Jingbo, Wei, Guo, Zhu, Jinkang
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper, we propose an optimal power allocation method for OFDM system with both total transmit power constraint (TTPC) and per-antenna power constraint (PAPC). In contrast to traditional water-filling method, the new one takes into account of the signal distortion caused by PAPC in deducing system capacity, therefore can achieve a more accurate allocation between multiple sub-channels. Simulation results confirm that the new method can better reduce signal distortion and maximize system capacity, especially when the signal power approaches the limit of PAPC.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2008.080618