浅谈水下定位技术的发展

本文介绍了水下定位技术的分类、研究与应用现状,并对其今后的发展趋势作了展望。     

线性最小均方误差在水声通信中应用

首先对水声信号的结构进行分析和研究,然后对影响其性能的部分采用线性最小均方误差估计的均衡算法,通过调制方式进行实验仿真。实验结果表明,本文所设计的算法性能比较稳定、复杂度低、均衡效果好。     

Multi-agent immune recognition of water mine model

It is necessary for mine countermeasure systems to recognise the model of a water mine before destroying because the destroying measures to be taken must be determined according to mine model. In this paper, an immune neural network （INN） along with water mine model recognition system based on multi-agent system is proposed. A modified clonal selection algorithm for constructing such an INN is presented based on clonal selection principle. The INN is a two-layer Boolean network whose number of outputs is adaptable according to the task and the affinity threshold. Adjusting the affinity threshold can easily control different recognition precision, and the affinity threshold also can control the capability of noise tolerance.     

水下信息体系发展及运用探讨

水下空间是信息透明差的空间,水下信息作战起步滞后。随着水下潜艇和水中兵器威胁的不断加大,以及水下通信、水下远程预警、信息融合及其他现代化技术的不断提高,水下信息战日渐成熟并将进入现代海战。本文分析外军典型的水下信息网络系统,并对水下信息作战体系框架及AUV在水下信息作战网络的运用特性进行探讨,研究结果有助于推动水下信息体系的发展。     

095型核潜艇会是什么样

近日，海外媒体报道中国海军已经开始建造新一代095型攻击核潜艇。从各方面的报道来看，095型攻击核潜艇采用了更先进的动力系统、水声系统、艇载武器及自动化指挥系统，综合作战能力达到了一个较高的水平。     

基于DSP的直接序列扩频水声通信技术研究

水声通信由于严重的多普勒效应和多径干扰衰落,导致传输误码率较高,而扩展频谱通信具有较好的抗干扰、抗衰落能力,可以实现数据的远距离、低功耗、高可靠性传输.论文首先对扩频通信中的直接序列扩频技术进行了系统仿真研究,然后在DSP硬件平台上进行实现.最后利用湖试实验,对采用直接序列扩频技术的水声通信功能进行验证.     

水声对抗技术发展及其概念拓展

近年来，我国的水声对抗技术有了长足的发展，主战潜艇和水面舰已经装备了实用的水声对抗系统。面对新的国际军事形势及各种新技术的发展，水声对抗也需要随之发展。通过从深度、广度、内涵和外延等四个方面对水声对抗技术的概念进行拓展，使其更加接近概念的本质。     

一种带反馈的多声纳跟踪融合算法

为了改善声纳系统目标跟踪性能,提出并推导了一种带反馈的两声纳跟踪融合算法,利用声纳距离、方位测量,对由两同步声纳构成的声纳系统目标跟踪融合性能进行仿真研究,结果表明:该融合算法能有效改善由两声纳构成的声纳系统目标跟踪性能,对声纳系统数据融合处理技术研究具有较大参考价值.     

运用水声探测进行RCS测量的技术简析

介绍了回声室主要组成和功能，并对声波和电磁波的散射特性进行了对比分析，指出两者不仅都遵循相同的反射和绕射定理，而且计算声场刚体有效散射面积的公式与计算理想金属物的RCS的公式在形式的“内容”上完全一致。     

A new source number estimation method based on the beam eigenvalue

Most source number estimation methods based on the eigenvalues are decomposed by covariance matrix in MUSIC algorithm. To develop the source number estimation method which has lower signal to noise ratio and is suitable to both correlated and uncorrelated impinging signals, a new source number estimation method called beam eigenvalue method (BEM) is proposed in this paper. Through analyzing the space power spectrum and the correlation of the line array, the covariance matrix is constructed in a new way, which is decided by the line array shape when the signal frequency is given. Both of the theory analysis and the simulation results show that the BEM method can estimate the source number for correlated signals and can be more effective at lower signal to noise ratios than the normal source number estimation methods.