Rate Maximization for Multiband OFDM Ultra Wideband Systems Using Adaptive Power and Bit Loading Algorithm
A new design for maximizing the data rate of the multiband orthogonal frequency division multiplexing ultra wideband systems is presented. The design is based on the generation of a series of M-ary quadrature amplitude modulation zones for each UWB subcarrier whose levels of fading depend on the UWB...
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| Vydáno v: | 2009 Fifth Advanced International Conference on Telecommunications s. 369 - 374 |
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| Hlavní autoři: | , , |
| Médium: | Konferenční příspěvek |
| Jazyk: | angličtina |
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IEEE
01.05.2009
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| ISBN: | 9781424438402, 1424438403 |
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| Abstract | A new design for maximizing the data rate of the multiband orthogonal frequency division multiplexing ultra wideband systems is presented. The design is based on the generation of a series of M-ary quadrature amplitude modulation zones for each UWB subcarrier whose levels of fading depend on the UWB channel model. The available transmitted power is then optimally distributed to use the modulation scheme with the maximum M in the subcarriers. The optimization is constrained by the target bit error rate and the limitation of the UWB transmit power spectral density in each subcarrier. The rate maximization has been obtained in a three-step algorithm consisting of M-QAM zones generation, primary and advanced power and bit loading. The performance of the proposed algorithm is analyzed over UWB channel. The results show that the data rate is significantly improved by an advanced power and bit loading scheme. |
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| AbstractList | A new design for maximizing the data rate of the multiband orthogonal frequency division multiplexing ultra wideband systems is presented. The design is based on the generation of a series of M-ary quadrature amplitude modulation zones for each UWB subcarrier whose levels of fading depend on the UWB channel model. The available transmitted power is then optimally distributed to use the modulation scheme with the maximum M in the subcarriers. The optimization is constrained by the target bit error rate and the limitation of the UWB transmit power spectral density in each subcarrier. The rate maximization has been obtained in a three-step algorithm consisting of M-QAM zones generation, primary and advanced power and bit loading. The performance of the proposed algorithm is analyzed over UWB channel. The results show that the data rate is significantly improved by an advanced power and bit loading scheme. |
| Author | Cano, E. McGrath, S. Liaoyuan Zeng |
| Author_xml | – sequence: 1 surname: Liaoyuan Zeng fullname: Liaoyuan Zeng organization: Wireless Access Res. Center, Univ. of Limerick, Limerick – sequence: 2 givenname: S. surname: McGrath fullname: McGrath, S. organization: Wireless Access Res. Center, Univ. of Limerick, Limerick – sequence: 3 givenname: E. surname: Cano fullname: Cano, E. |
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| Snippet | A new design for maximizing the data rate of the multiband orthogonal frequency division multiplexing ultra wideband systems is presented. The design is based... |
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| StartPage | 369 |
| SubjectTerms | Adaptive systems Bit error rate Constraint optimization Fading OFDM Performance analysis Power generation Power system modeling Quadrature amplitude modulation Ultra wideband technology |
| Title | Rate Maximization for Multiband OFDM Ultra Wideband Systems Using Adaptive Power and Bit Loading Algorithm |
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