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中文核心期刊

极地脉冲噪声环境下水声信道时延−多普勒参数估计方法

Estimation method of underwater acoustic channel delay-Doppler parameters in polar impulsive noise environment

  • 摘要: 针对极地脉冲噪声导致现有估计算法性能下降甚至失效的问题, 提出了一种鲁棒的正交匹配追踪算法。首先, 通过引入最大相关熵准则(MCC)实现原子基的准确选择; 其次, 利用L_1范数重构损失函数, 减轻脉冲噪声对于参数求解的影响。同时, 采用基于分布式迭代优化策略的交替方向乘子法(ADMM), 高效地获取全局最优解。数值仿真和基于中国第九次北极科考冰下实测脉冲噪声数据处理结果表明, 所提方法相较于经典算法有明显的性能提升, 在脉冲噪声下具有更高的估计精度和更强的鲁棒性。

     

    Abstract: To tackle the challenge where existing estimation algorithms exhibit performance deterioration or complete failure in polar environments due to impulsive noise, this paper presents a robust orthogonal matching pursuit (OMP) algorithm. Firstly, accurate selection of atom bases is achieved by introducing the maximum correntropy criterion (MCC). Secondly, the L_1-norm is utilized to reconstruct the loss function, mitigating the impact of impulse noise on parameter estimation. Simultaneously, the alternating direction method of multipliers (ADMM) is employed to efficiently obtain the global optimal solution. Numerical simulations and the processing of experimental data collected from the 9th Chinese National Arctic Research Expedition have shown that the proposed method exhibits significant performance improvements compared to classical algorithms. Specifically, it exhibits higher estimation accuracy and stronger robustness under impulsive noise conditions.

     

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