战场监视雷达发展概况

本文系统地介绍外军战场监视雷达的发展情况、战术应用、技术特点和今后的发展趋向,重点分析了三个有代表性的产品,供国内同行参考。     

“地平线”远程战场侦察雷达系统

远程战场侦察雷达是外军８０年代中后期研制的一种新型占场侦察雷达。在海湾战争后，其作用正被得到进一步认可与发展。法军研制并投入海湾战争的直升机载“地平线”远程侦察雷达系统在战后的“起死复生”充分表明：直升机载的远程战场侦察雷达系统完全可以满足现代高技术战争的作战需要。本文在分析该系统的作战能力以后，重点论述“地平线”系统的论证思路，最后简要介绍其发展现状与趋势。     

远程战场侦察雷达系统的应用和发展

现代战争，往往有大量机械化部队的投入，有飞机、坦克、各种车辆、舰船以及各种规代杀伤性武器，敌我态势瞬息万变。可以说，战局的胜负在指挥员运筹和决心的一瞬间。指挥员的决心出自对敌情报的了解，这就需要实时、可靠地情报侦察。在８０年代一些国家大量投资‘发展的远程战场侦察雷达，在对敌战场纵深侦察上可发挥重要作用，这已被海湾战争的情况所证实。本文评述国内外远程战场侦察雷达的应用和发展，并且提出对我国发展远程战     

机载战场监视雷达系统现状及趋势的市场分析

现代战争中,战场情报监视是赢得信息优势的重要手段之一,机载战场监视雷达因其机动性强及较低成本而成为探测目标和获取信息的主要装备。文中详细介绍了典型的有人及无人机载监视雷达系统的历史背景及服役状况;并从市场投资、现役SAR雷达技术,包括作用距离及长航时进行分析,同时对机载战场监视雷达的市场趋势进行了展望。     

机载远程战场侦察雷达发展评述

主要说明顾固定冀和直升机载战场侦察雷达的特点,以及近年来机载战场侦察雷达的发展状况并展望今后的发展趋势。     

地面战场监视雷达及其应用综述

地面监视雷达（GSR）系统有时又称战场侦察雷达或动目标侦察雷达,可以用于多种战术战场应用。此类系统主要装备于陆军部队,用于警戒、侦察敌方运动中的人员、车辆和坦克等目标,测定方位、距离和活动路线,提供敌军地面活动情报。     

国外升空战场侦察雷达评述

本文在讨论了战场侦察雷达升空的必要性及其性能要求以后,以空中平台为例,介绍了各国正在研制的各种升空战场侦察雷达系统的概况,并将各种空中平台(系留气球、旋翼式遥控飞行器、飞艇、直升机、无人机和固定翼飞机等)的性能进行比较。文章最后认为,旋翼式遥控飞行器将是第三世界国家适宜采用的一种空中平台。     

系留气球载监视雷达述评

本文着重论述国外系留气球载监视雷达系统的技术,发展现状及其应用。描述这种系统的各个组成部分,列表汇总了几种典型的陆基和舰基系留气球载监视雷达系统。并根据这种系统的特点,对我国发展系留气球载雷达提出一些建议。     

多径效应及其对二次警戒雷达的干扰影响

在航空交通管制(ATC)方面,二次警戒雷达(SSR)较之一次雷达有许多优点,且有较好的性能/价格比。由于二次雷达在航管方面的应用愈来愈多,二次雷达的一些系统问题也就表现得较为突出了。本文讨论了多径和互扰的一些问题,并提出了相应的解决方法。     

国外战场雷达发展现状

本文介绍国外战场雷达的现状,包括轻小型化、武器定位及低空目标探测等几个方面。     

Improvement on algorithm of confidence declaration of mode s second surveillance radar

Mode S Second Surveillance Radar (SSR) is very important means for Air Traffic Control (ATC) now and future, all the responding data which the radar receives need parity processing. Bit and confidence declaration is an vital step before error detection and error correction. Based on the commonly used baseline multi-sample algorithm, different conditions are presented and analyzed, the conditions under which error happens are pointed out, and the algorithm in which two statistical variables are added to avoid false declara-tion. In addition, the moving average method is used to preprocess the sampled data, so as to reduce the in-fluence of noise. The merits the baseline multi-sample technique owes are preserved, and the added computa-tion is small. The declaration veracity is improved, and consequently makes error detection and error correc-tion be facilitated successfully.     

战场侦察雷达杂波对消技术

为了进一步改善战场侦察雷达对杂波的抑制能力,通过对递归与非递归动目标显示(MTI)滤波器的性能研究,总结了零级点对MTI滤波器性能的影响。结合战场侦察雷达的特性,设计了3种MTI滤波器模型。通过仿真分析其频谱特性和改善因子,结果表明,在不同的杂波背景下,选择设计相应的MTI滤波器,能够有效抑制杂波,并能得到较大的改善因子。     

Method of multi-target tracking in wide area surveillance airborne radar system basing on clustering analysis

This paper proposed a robust method based on the definition of Mahalanobis distance to track ground moving target. The feature and the geometry of airborne ground moving target tracking systems are studied at first. Based on this feature, the assignment relation of time-nearby target is calculated via Mahalanobis distance, and then the corresponding transformation formula is deduced. The simulation results show the correctness and effectiveness of the proposed method.     

战场情报侦察系统的现状前瞻及发展建议

本文介绍当前国外战场情报侦察系统的发展近况。文中对几种典型的战场侦察系统进行了评论。最后作者就发展我国战场情报侦察系统提出了几点建议     

Gait recognition based on vision systems: A systematic survey

With the growing popularity of biometrics technology in the pattern recognition field, especially identification of human has gained the attention of researchers from both academia and industry. One such type of biometric technique is Gait recognition, which is used to identify a human being based on their walking style. Generally, two types of approaches are adopted by any algorithm designed for gait recognition, namely model based and model free approaches. The key reason behind the popularity of gait recognition is that it can identify a person from a considerable distance while other biometrics has failed to do so. In this paper, the authors have conducted a survey of extant studies on gait recognition in consideration of gait recognition approaches and phases of a gait cycle. Moreover, some aspects like floor sensors, accelerometer based recognition, the influences of environmental factors, which are ignored by exiting surveys, are also covered in our survey study. The information of gait is usually obtained from different parts of silhouettes. This paper also describes different benchmark datasets for gait recognition. This study will provide firsthand knowledge to the researchers working on the gait recognition domain in any real-world field. It has been observed that work done on the gait recognition with sufficiently high accuracy is limited in comparison to research on various other biometric recognition systems and has enough potential for future research.