Adaptive power loading based on unequal-ber strategy for OFDM systems
An adaptive power loading algorithm with uniform (nonadaptive) bit allocation is proposed for constant data rate OFDM systems in this letter. This algorithm aims to minimize the transmit power while guaranteeing the target mean bit error rate (BER). The power loading is based on the unequal-BER (UBE...
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| Vydáno v: | IEEE communications letters Ročník 13; číslo 7; s. 474 - 476 |
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| Hlavní autoři: | , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
New York, NY
IEEE
01.07.2009
Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Témata: | |
| ISSN: | 1089-7798, 1558-2558 |
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| Abstract | An adaptive power loading algorithm with uniform (nonadaptive) bit allocation is proposed for constant data rate OFDM systems in this letter. This algorithm aims to minimize the transmit power while guaranteeing the target mean bit error rate (BER). The power loading is based on the unequal-BER (UBER) strategy which permits unequal mean BERs on different subcarriers. The closed-form expressions for optimal BER and power distributions are derived. Simulation results indicate the superiority of the proposed algorithm. |
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| AbstractList | An adaptive power loading algorithm with uniform (nonadaptive) bit allocation is proposed for constant data rate OFDM systems in this letter. This algorithm aims to minimize the transmit power while guaranteeing the target mean bit error rate (BER). The power loading is based on the Unequal-BER (UBER) strategy which permits unequal mean BERs on different subcarriers. The closed-form expressions for optimal BER and power distributions are derived. Simulation results indicate the superiority of the proposed algorithm. |
| Author | Kaiming Liu Bihua Tang Yuan'an Liu |
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| Copyright | 2009 INIST-CNRS Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2009 |
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| Keywords | Adaptive algorithm OFDM Bit error rate Information rate Subcarrier Information transmission Bit allocation power loading Simulation Unequal-BER Power distribution Orthogonal frequency division multiplexing Adaptive modulation |
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| SubjectTerms | Adaptive algorithms Adaptive systems Algorithms Allocations Applied sciences Bit error rate Bit rate Broadband communication Closed-form solution Exact sciences and technology Exact solutions Frequency division multiplexing Information, signal and communications theory Mathematical analysis Modulation coding Modulation, demodulation Multiplexing OFDM Optimization Orthogonal Frequency Division Multiplexing Partitioning algorithms Power distribution Signal and communications theory Strategy Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Transmission and modulation (techniques and equipments) Wireless communication |
| Title | Adaptive power loading based on unequal-ber strategy for OFDM systems |
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