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Adaptive modulation based on steady-state mean square error for underwater acoustic communication
EURASIP Journal on Wireless Communications and Networking ( IF 2.6 ) Pub Date : 2021-03-31 , DOI: 10.1186/s13638-021-01956-w
Zhiyong Liu , Zhoumei Tan , Fan Bai

To improve the transmission efficiency and facilitate the realization of the scheme, an adaptive modulation (AM) scheme based on the steady-state mean square error (SMSE) of blind equalization is proposed. In this scheme, the blind equalization is adopted and no training sequence is required. The adaptive modulation is implemented based on the SMSE of blind equalization. The channel state information doesn’t need to be assumed to know. To better realize the adjustment of modulation mode, the polynomial fitting is used to revise the estimated SNR based on the SMSE. In addition, we also adopted the adjustable tap-length blind equalization detector to obtain the SMSE, which can adaptively adjust the tap-length according to the specific underwater channel profile, and thus achieve better SMSE performance. Simulation results validate the feasibility of the proposed approaches. Simulation results also show the advantages of the proposed scheme against existing counterparts.



中文翻译:

基于稳态均方误差的水下声通信自适应调制

为了提高传输效率并促进该方案的实现,提出了一种基于盲均衡的稳态均方误差(SMSE)的自适应调制(AM)方案。该方案采用盲均衡,不需要训练序列。自适应调制是基于盲均衡的SMSE实现的。不需要假定信道状态信息是已知的。为了更好地实现调制方式的调整,多项式拟合被用于基于SMSE修改估计的SNR。此外,我们还采用了可调抽头长度盲均衡检测器来获得SMSE,它可以根据特定的水下通道轮廓自适应地调整抽头长度,从而获得更好的SMSE性能。仿真结果验证了所提方法的可行性。仿真结果也表明了该方案相对于现有方案的优势。

更新日期:2021-03-31
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