利用改进MUSIC方法进行洋流方位估计  

Ocean current direction estimation based on improved MUSIC method

作　　者：潘博志 何宏昌 范冬林 宫子怡 刘镇豪 PAN Bozhi;HE Hongchang;FAN Donglin;GONG Ziyi;LIU Zhenhao(Guilin University of Technology,Guilin 541000,China)

机构地区：[1]桂林理工大学,广西桂林541000

出　　处：《测绘通报》2024年第6期134-138,共5页Bulletin of Surveying and Mapping

基　　金：广西自然科学基金(2022GXNSFBA035637);北部湾海域叶绿素a浓度场遥感监测方法研究(2022/03-2025/03);“广西八桂学者”专项经费。

摘　　要：洋流能够调节全球热量的分布,降低航运成本。以往的洋流方位估计方法未对洋流信号源之间的相关性进行完全消除,导致估计效果较差。因此,本文设计了基于改进MUSIC方法的洋流方位估计方法。首先,以采集到的洋流信号为基础,构建洋流阵列信号模型,并对洋流信号进行降噪处理,提高信号数据的质量。然后,为减少洋流信号源之间相关性对估计结果的影响,利用改进MUSIC方法及协方差矩阵,对洋流信号源相关性进行消除,通过计算信号源的相关参数,构建洋流方位估计模型。最后,通过对洋流信号源的转换,实现洋流方位的估计。在仿真试验中,以南海部分海域为试验对象,对不同谱点下估计方法的估计效果进行评价,与以往的洋流方位估计方法相比,设计的基于改进MUSIC方法的洋流方位估计方法精度高达97.2%,应用效果更好。Ocean currents can regulate global heat distribution and reduce shipping costs.The previous methods for estimating the direction of current have not completely eliminated the correlation between current signal sources,resulting in poor estimation performance.Therefore,a method for estimating the current direction based on the improved MUSIC method was designed.Firstly,based on the collected current signals,the current array signal model is constructed,and the current signals are denoised to improve the quality of signal data.Then to reduce the impact of the correlation between current signal sources on the estimation results,the correlation of current signal sources is eliminated using the improved MUSIC method and the covariance matrix.The current bearing estimation model is constructed by calculating the correlation parameters of the signal sources.Finally,by converting the ocean current signal source,the estimation of the ocean current direction is achieved.In the simulation experiment,a portion of the South China Sea is used as the experimental object to evaluate the estimation performance of estimation methods under different spectral points.Compared with previous ocean current direction estimation methods,the designed ocean current direction estimation method based on the improved MUSIC method has an estimation accuracy of 97.2%and a better application effect.

关 键 词：改进MUSIC方法 洋流方位估计 洋流 方法设计 

分 类 号：P229[天文地球—大地测量学与测量工程]