937 resultados para Lagrange interpolation
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"AEC Contract AT(04-3)-400."
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Discorso letto nel R. Liceo Galilei di Pisa per la Festa Letteraria Commemorativa.
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Errata: p. [143].
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Errata slip inserted.
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"First published during the war as a classified report to Section D2, National Defense Research Committee."
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This paper describes two algorithms for adaptive power and bit allocations in a multiple input multiple output multiple-carrier code division multiple access (MIMO MC-CDMA) system. The first is the greedy algorithm, which has already been presented in the literature. The other one, which is proposed by the authors, is based on the use of the Lagrange multiplier method. The performances of the two algorithms are compared via Monte Carlo simulations. At present stage, the simulations are restricted to a single user MIMO MC-CDMA system, which is equivalent to a MIMO OFDM system. It is assumed that the system operates in a frequency selective fading environment. The transmitter has a partial knowledge of the channel whose properties are measured at the receiver. The use of the two algorithms results in similar system performances. The advantage of the Lagrange algorithm is that is much faster than the greedy algorithm. ©2005 IEEE