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 |
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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. |
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ISSN: | 1089-7798 1558-2558 |
DOI: | 10.1109/LCOMM.2008.080618 |