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Low Complexity Discrete Bit-loading for OFDM Systems with Application in Power Line Communications

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Author(s): Khalifa S. Al-Mawali | Amin Z. Sadik | Zahir M. Hussain

Journal: International Journal of Communications, Network and System Sciences
ISSN 1913-3715

Volume: 04;
Issue: 06;
Start page: 372;
Date: 2011;
Original page

Keywords: Bit-Loading | OFDM | Power Line Communications

ABSTRACT
Adaptive bit-loading algorithms can improve the performance of OFDM systems significantly. The tradeoff between the performance of the algorithm and its computational complexity is essential for the implementation of loading algorithms. In this paper, we present a low complexity non-iterative discrete bit-loading algorithm to maximize the data rate subject to specified target BER and uniform power allocation. Simulation results show that the proposed algorithm outperforms the equal-BER loading and achieves similar rates to incremental allocation, yet with much lower complexity.

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