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| Research on Self-adjusting OFDM Underwater Acoustic Communication Algorithm for Transmission Rate Maximization |
| Luo Ya-song① Xu Jiang-hu① Hu Hong-ning① He Jing-bo① Chen Zhan-wei② |
①(Electronics Engineering College, Naval Universit of Engineering, Wuhan 430033, China)
②(Coach Division of Logistic Department, Navy Qingdao Marine Area, Qingdao 266102, China) |
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Abstract 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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Received: 15 April 2015
Published: 13 October 2015
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| Fund: The National Natural Science Foundation of China (61101205) |
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Corresponding Authors:
Luo Ya-song
E-mail: yours_baggio@sina.com
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