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在浅海信道中目标点源与干扰点源的潜在信息——深度差异和远近差异,可以由垂直阵过滤简正波而加以利用.由于波导中点源激发的近场能量集中赋给“射线成员”;而点源远场能量则集中赋给“简正波成员”.换言之,与自由场中之点源不同,在波导中以简正波为正交基底展开的场表示中,近场点源是“宽带”过程,而远场点源是“窄带”过程,即近场点源具有很宽的简正波谱,而远场点源则具有较窄
The potential information of the point source and the point source of interference in the shallow-sea channel-the depth difference and the distance difference, can be used by filtering the normal wave through the vertical array. Because the near-field energy excited by the point source in the waveguide concentrates on the “ray members” In contrast, unlike the point sources in the free field, the field in the waveguide where the normalized wave is the orthogonal basis expresses that the near-field point source is the “broadband” process , While the far-field point source is a “narrow-band” process, ie, the near-field point source has a very wide normalized spectrum and the far-field point source has a narrower