基于最小二乘的短垂线阵匹配场处理

发布时间：2018-02-07 13:41

本文关键词： 匹配场处理被动定位最小二乘算法声场重构　出处：《电子与信息学报》2017年06期 　论文类型：期刊论文

【摘要】：匹配场处理通常要求接收基阵能够覆盖整个水层,如此大尺度的布阵方式严重阻碍了该方法的广泛使用。为了缓解匹配场处理对阵形的苛刻要求,该文提出一种基于最小二乘的短垂线阵匹配场处理技术。该方法把接收阵的声场分解为模态函数矩阵和模态系数向量,并在最小范数意义下用最小二乘算法得到了各阶模态系数的估计值,在此基础上重新构造了短垂线阵的测量场向量,使得重构后的测量场包含更多的环境信息,从而提高了短垂线阵匹配场处理的性能。最后,在典型的Pekeris波导环境中进行仿真,以3种布放在水面附近的短垂线阵为例,分析了匹配场被动定位的性能,并用广义余弦量化分析了不同布阵方式对测量场的影响。结果表明:使用最小二乘算法对短阵的测量场进行声场重构后广义余弦变大,此时短垂线阵匹配场处理的定位性能得到改善,验证了该算法的有效性。
[Abstract]:The matching field processing usually requires that the receiving array can cover the whole water layer, so the widespread use of the method is seriously hindered by the large scale array arrangement. In order to alleviate the harsh requirements of matching field processing on the formation, In this paper, a method for processing the matching field of a short vertical array based on least squares is proposed, which decomposes the sound field of the receiving array into a modal function matrix and a modal coefficient vector. In the sense of minimum norm, the estimated values of each order modal coefficients are obtained by using the least square algorithm. On this basis, the measurement field vector of the short vertical array is reconstructed, which makes the reconstructed measurement field contain more environmental information. Finally, the simulation is carried out in the typical Pekeris waveguide environment. Taking three kinds of short perpendicular arrays located near the water as an example, the performance of passive location of the matching field is analyzed. The effect of different array arrangement on the measurement field is analyzed by using generalized cosine quantization. The results show that the generalized cosine becomes larger after the sound field reconstruction of the measurement field of the short array by using the least square algorithm. At the same time, the location performance of the short vertical array matching field processing is improved, and the effectiveness of the algorithm is verified.
【作者单位】：西北工业大学航海学院;
【分类号】：TB56

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