Based on the modeling of transmission rate maximization problem for Orthogonal Frequency Division Multiplexing (OFDM) underwater acoustic communication, the computing amount for water-filling algorithm is reduced reasonably, which realizes rapid assignments for sub-carriers’ initial energy. To deal with the serious waste of symbol energy existing in the bit assigning algorithm based on fixed threshold, the new greedy algorithm is brought forward, which improves the OFDM transmission rate remarkably with less cost of additional calculation. Results show that the new algorithm behaves favorable properties of transmission rate and Bit Error Rate (BER) even with incomplete channel estimation information suitable for time-variant underwater acoustic channel.
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Luo Ya-song, Xu Jiang-hu, Hu Hong-ning, He Jing-bo, Chen Zhan-wei. Research on Self-adjusting OFDM Underwater Acoustic Communication Algorithm for Transmission Rate Maximization. JEIT, 2015, 37(12): 2872-2876.
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