Abstract
We consider the problem of adaptive distribution of bits and power across the subcarriers in an OFDM radio-communication system operating in frequency-selective environments and propose a new joint adaptive bit and power allocation which ensures a significant increase in the data transmission rate for the given bit error probability. We present a scheme for practical implementation of the proposed algorithm. The results of mathematical simulation, which demonstrate the high efficiency of the proposed algorithm, are presented for the case of a multipath Rayleigh channel with an exponential multipath intensity profile. We study the influence of the Doppler variation in the frequency-selective channel in time on the efficiency of the proposed algorithm.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 49, No. 2, pp. 174–184, January 2006.
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Mal’tsev, A.A., Rubtsov, A.E. & Pudeev, A.V. Method of adaptive distribution of bits and power across the subcarriers in OFDM radio-communication systems. Radiophys Quantum Electron 49, 156–165 (2006). https://doi.org/10.1007/s11141-006-0047-8
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DOI: https://doi.org/10.1007/s11141-006-0047-8