为了研究目标舰船辐射噪声对声纳作用距离产生的影响，用蒙特卡洛方法对目标航速进行模拟。
In order to research the affection of ship's radiate noise on sonar detecting range, this paper simulates the ship's velocity by Monte Carlo method.
声纳：利用声学方法侦测或测定水下物体的距离和方向的技术。
Sonar :Technique for detecting and determining the distance and direction of underwater objects by tracking acoustic echoes.
本文针对主动声纳的特点，分析了利用LMS算法的自适应线谱增强器提高主动声纳作用距离的可行性。
This paper analysised the possibility of using the adaptive line spectrum enhancer with LMS to improve the detection range of active sonar according to its characteristics.
军用方面，匹配场定位、低频远程声纳作用距离预报、潜艇沉底隐蔽地点选择等方面都有广泛的应用。
In military engineering applications, identification of sea bottom types are vary important for match field location, low-frequency sonar distance forecast, and choosing the location for submarine.
本文通过对低频主动声纳的主动声纳方程的分析与声学探测过程的仿真，初步研究了低频主动声纳在不同距离上的最优探测频率问题。
With analyzing the detecting procedure of Low-frequency active sonar and emulating about it, the Optimum Detection frequency Band of Low-frequency active sonar were researched.
被动测距声纳系统是利用换能器基阵接收的目标辐射（噪声）信号来估计目标距离。
The system of passive ranging SONAR makes use of the target noise received by the equipment which converts energy from one form to another to estimate the target distance.
脉冲压缩雷达体制很好的解决了在普通脉冲雷达中作用距离和分辨能力之间的矛盾，因此脉冲压缩技术广泛用于雷达、声纳等系统。
The technique of pulse compression is widely applied in radar and sonar systems because it resolves the contradiction between action distance and differentiate.
首先根据声纳方程，推导出了声纳浮标作用距离的预报模型。
Firstly, the prediction model was induced according to the equation of sonar.
合成孔径技术相对于常规声纳技术的突出优势在于，它只利用小孔径的物理声阵，就可以得到与径向距离和频率都无关的高方位分辨率。
The very strong property of the synthetic array sonar is the ability to acquire a high azimuth resolution from a physically small array.
利用有一定间距的两部声纳基阵提供的目标方位和时延差的信息，实现对目标的被动测距。建立了测距物理模型，给出了后置距离滤波算法。
In this paper, we introduce passive ranging of target based on the bearings and time-delay information of dual arrays and filtering algorithm of ranging.
利用有一定间距的两部声纳基阵提供的目标方位和时延差的信息，实现对目标的被动测距。建立了测距物理模型，给出了后置距离滤波算法。
In this paper, we introduce passive ranging of target based on the bearings and time-delay information of dual arrays and filtering algorithm of ranging.
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