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Article Dans Une Revue Eurasip Journal on Applied Signal Processing Année : 2007

Resource allocation with adaptive spread spectrum OFDM using 2D spreading for power line communications

Résumé

Bit-loading techniques based on OFDM are frequently used over wire-line channels. In the power-line context, channel state information can reasonably be obtained at both transmitter and receiver sides, and adaptive loading can advantageously be carried out. In this paper, we propose to apply loading principles to an SS-OFDM waveform which is a multi-carrier system using 2D spreading in the time and frequency domains. The presented algorithm handles the subcarriers, spreading codes, bits and energies assignment in order to maximize the data rate and the range of the communication system. The optimization is realized at a target symbol error rate and under spectral mask constraint as usually imposed. The analytical study shows that the merging principle realized by the spreading code improves the rate and the range of the DMT system in single and multi-user contexts. Simulations have been run over measured PLC channel responses and highlight that the proposed system is all the more interesting than the received SNR is low.
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Dates et versions

hal-00173430 , version 1 (18-09-2014)

Identifiants

  • HAL Id : hal-00173430 , version 1

Citer

Jean-Yves Baudais, Matthieu Crussière. Resource allocation with adaptive spread spectrum OFDM using 2D spreading for power line communications. Eurasip Journal on Applied Signal Processing, 2007, 2007, pp.ID 20542. ⟨hal-00173430⟩
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