Bit rate maximization for LP-OFDM with noisy channel estimation

Fahad Syed Muhammad (1) , Jean-Yves Baudais (2) , Jean-François Hélard (2)

1 IETR - Institut d'Electronique et de Télécommunications de Rennes
2 IETR - Institut d'Électronique et des Technologies du numéRique

The resource allocation problem to maximize the bit rate of a linear precoded orthogonal frequency division multiplexing ({LP-OFDM}) system is considered taking into account the effects of imperfect channel state information. A discrete bit loading algorithm is proposed, which sustains the target bit error rate even under high mean square error (MSE) of estimation. The proposed scheme enhances the robustness of the system against noisy channel estimation without significantly compromising on the system throughput. It is shown that the proposed {LP-OFDM} allocation is more robust to estimation noise than {OFDM} allocations and provides sustainable mean bit error rate performance even at high MSEs. The results are shown for a power line communication system using a well-known multipath channel model.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Fahad Syed Muhammad, Jean-Yves Baudais, Jean-François Hélard. Bit rate maximization for LP-OFDM with noisy channel estimation. 3rd International Conference on Signal Processing and Communication Systems, Sep 2009, Omaha, Nebrask, United States. pp.1--6, ⟨10.1109/ICSPCS.2009.5306408⟩. ⟨hal-00429812⟩