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A comparison between different adaptive beamforming techniques 不同自适应波束形成技术的比较
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069636
Rajen Kumar Patra, C. Nayak
{"title":"A comparison between different adaptive beamforming techniques","authors":"Rajen Kumar Patra, C. Nayak","doi":"10.1109/ICORT46471.2019.9069636","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069636","url":null,"abstract":"Smart antennas consist of an antenna array and an adaptive processor which is used to optimise some specific criteria. In this paper, different adaptive beamforming algorithms like Least Mean Square (LMS), Recursive Least Square (RLS), Sample Matrix Inversion (SMI), Conjugate Gradient (CG) and Constant Modulus (CM) algorithms are looked into. LMS, RLS and CG beamformers iteratively converge to optimum weights for signal and interference conditions. Here number of operations per iteration and number of iterations needed for convergence contribute to computational complexity. In case of SMI beamformer the dimension of block of received data snapshots contributes to complexity. The performance of these beamformers is analysed in terms of convergence speed and complexity. Simulations have been carried out with 8, 16 and 32-element array. The complexity increases with increase in number of array elements whereas their beam width reduces. Reduction in beamwidth improves angular resolution in beam steering. It is observed that the LMS beamformer is a potential candidate in terms of performance trade off between array dimensions and computational complexity. Results are consistent for beam steering towards a specific signal and interference direction as well as for varying arrival angles of signal and interference.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121542139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Flight Trial against Low Speed Ballistic Target Emulating High Speed Target Interception 模拟高速目标拦截的低速弹道目标飞行试验
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069616
U. Sahu, P. Dwivedi, A. Bhattacharyya
{"title":"Flight Trial against Low Speed Ballistic Target Emulating High Speed Target Interception","authors":"U. Sahu, P. Dwivedi, A. Bhattacharyya","doi":"10.1109/ICORT46471.2019.9069616","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069616","url":null,"abstract":"Defending the territory against the incoming threats like high speed Intercontinental Ballistic Missiles (ICBMs), Theatre Ballistic Missiles (TBMs), multiple Re-entry Vehicles (RVs), Quassi-Ballistic Missiles (QBMs) and simultaneous or coordinated attack of one such class or combination of all, still poses a daunting challenge to the missile defence designers. Although missile and other supporting systems are designed (or selected) using extensive modeling & simulations and each of them undergo various stages of qualification and checks, it is imperative to carry out the actual flight trials to assess the performances of each of these along with the overall mission. Many times, flight trial with actual target is not possible due to unavailability of high speed (or higher range) targets and test range constraint. In this paper, a method has been proposed where the flight trial can be conducted with a low speed target which can simulate all the problems of hight speed target and hence eliminate the requirement of testing high speed real target.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130910169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Passive Radar using non-electronic steering surveillance Radar as source
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069649
Bharadwaj Ls, S. D., Vishnu Oc
{"title":"Passive Radar using non-electronic steering surveillance Radar as source","authors":"Bharadwaj Ls, S. D., Vishnu Oc","doi":"10.1109/ICORT46471.2019.9069649","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069649","url":null,"abstract":"Various sources of illuminators can be used as source for Passive Radar. In this paper we examine the use a non electronic steering surveillance Radar as source. A technique is devised to use a single receive station in bistatic configuration to obtain 2D information of targets. We propose a low cost commercial SDR and workstation based solution for prototyping the Radar. Preliminary results obtained using the prototype setup which detects commercial aircrafts in excess of 80 kms is presented.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130982317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
3D pose estimation of UAVs using Stereovision 基于立体视觉的无人机三维姿态估计
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069621
Samvram Sahu, Arnab Karmakar, Priyadarshnam Hari
{"title":"3D pose estimation of UAVs using Stereovision","authors":"Samvram Sahu, Arnab Karmakar, Priyadarshnam Hari","doi":"10.1109/ICORT46471.2019.9069621","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069621","url":null,"abstract":"Pose estimation for Unmanned Aerial Vehicles (UAV) is essential for critical maneuvers such as landing and docking. In this work we propose a simple stereovision based pose estimation algorithm using salient points detection. We propose a modular pipeline consisting of 3 major blocks: Image Segmentation (IS), Perspective Transform (PT) and Pose Determination (PD). IS block uses segmentation to detect salient points from the image which the PT block transforms from image coordinates to world coordinates. PD block uses camera parameters and object dimensions to provide Attitude and Translation matrix of the UAV. The proposed approach is highly dynamic and can adjust with change in environmental parameters.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123793072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Background Oriented Schlieren (BOS) Technique: An Effective Flow Visualization Tool for Intermediate Ballistics 背景定向纹影(BOS)技术:一种有效的中程弹道流场可视化工具
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069668
S. Mohapatra, P N Mohanty, H S Panda, T. K. Biswal
{"title":"Background Oriented Schlieren (BOS) Technique: An Effective Flow Visualization Tool for Intermediate Ballistics","authors":"S. Mohapatra, P N Mohanty, H S Panda, T. K. Biswal","doi":"10.1109/ICORT46471.2019.9069668","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069668","url":null,"abstract":"The motion of the projectile inside the gun barrel and its emergence from it causes different flow phenomena such as precursor phenomena, muzzle flash phenomena to occur, across its surrounding. The projectile is under the influence of muzzle flash shock wave till it is completely out of it. To visualize the intermediate ballistic zone of a low calibre supersonic projectile, an effective non-intrusive flow visualization tool i.e. Background Oriented Schlieren (BOS) technique is implemented here. The technique involves that the variation of density in the flow field causes change in refractive index. The BOS technique involves a background of good contrast characteristics, digital camera of good resolution. The details about the experimental set up are described in the paper. The density field is reconstructed by solving the Poisson equation in which the source term is obtained from cross-correlation between the distorted and undistorted image of the background. The muzzle flash phenomena and the density field distribution in the intermediate ballistic zone are discussed.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122653696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Advanced Techniques for Low sidelobe level array antennas 低旁瓣电平阵列天线的先进技术
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069601
P. H. Rao
{"title":"Advanced Techniques for Low sidelobe level array antennas","authors":"P. H. Rao","doi":"10.1109/ICORT46471.2019.9069601","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069601","url":null,"abstract":"This paper presents a review of novel methods in realizing the low sidelobe level array antennas. These methods highlight the concept of CSRR loading, inteferometry by end element loading, unequal spaced array, phase only synthesis for creating low sidelobe levels. In one of the approaches, Left hand media (LH) in the form of complementary split ring resonators (CSRRs) loaded array antennas is presented to achieve a sidelobe suppression of better than 10dB. In another approach, a synthesis technique of pattern interferometry in linear and planar arrays configurations is proposed, to exhibit control over the sidelobe suppression. Interferometry patterns are generated by loading one element each at the end of linear array. Alternatively genetic algorithms (GA) and its variations are used to create un-equal spacing between the antenna elements to create low sidelobe level array antennas. Multilayer planar array antennas are also proposed for sidelobe suppression and cross polarisation reduction.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125956997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Investigation on burning behaviour of different Propellants in Closed Vessel of Gas generator Cartridge for water-jet application 不同推进剂在喷水用燃气发生器装药密闭容器内燃烧特性的实验研究
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069657
B. Parate, A. Sahu, C. P. Shetty, H. Shekhar, S. Chandel, V. Dixit, K. M. Rajan
{"title":"Experimental Investigation on burning behaviour of different Propellants in Closed Vessel of Gas generator Cartridge for water-jet application","authors":"B. Parate, A. Sahu, C. P. Shetty, H. Shekhar, S. Chandel, V. Dixit, K. M. Rajan","doi":"10.1109/ICORT46471.2019.9069657","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069657","url":null,"abstract":"Gas generator cartridges gives certain specified performances to operate various mechanisms related to aircraft. The propellants used in this cartridge under study are utilised in destruction of doubtful improvised explosive devices (IEDs) by generating high speed water-jet. The novelty in this research article is that, it is attempted to find out the various internal ballistic parameters of single base propellants and double base propellants in the form of powder. The outputs from closed vessel (CV) evaluation of gun propellants are maximum pressure, differentiation of pressure with respect to time, average vivacity, force constant, rise time, pressure index including burning coefficient. The ballistic parameters of single base propellant & double base propellants are evaluated in CV. The double base propellant gives more pressure (290.1 MPa) than single base propellant (253.5 MPa). The rise time for single base propellant (0.46 ms) is less than that of double base propellant (0.38 ms) which indicates that it burn fast. The study is undertaken to see behaviour of different propellants burning in CV at same loading density of 0.2 g/cc. Both the propellants gave the same performance considering the end use i.e. destruction of IEDs. After analysis of the results, it is recommended that double base propellant should be used as it is safe during manufacturing, more storage life and possesses more energy in terms of force constant. This paper describes the experimental investigation on burning behaviour of single and double base propellant and approach adopted for comparative performance of propellants in CV. From this study it is concluded that both the propellants can be used for disruptor application after conduct of experimental trials.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129146538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development Of A Decision Algorithm For Range Safety During Missile Flight Test 导弹飞行试验中射程安全决策算法的发展
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069664
Saumya Basu Thakur, S. Mukhopadhyay, Shraboni Ghosh
{"title":"Development Of A Decision Algorithm For Range Safety During Missile Flight Test","authors":"Saumya Basu Thakur, S. Mukhopadhyay, Shraboni Ghosh","doi":"10.1109/ICORT46471.2019.9069664","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069664","url":null,"abstract":"The paper deals with development of an algorithm to help the missile test Range Safety Officer (RSO) in deciding the continuation of the flight vehicle trial based on the estimated impact point of the vehicle. It deals with development of a flight vehicle simulation model with the provision of introducing various types of failures that affect the vehicle trajectory. With the estimated trajectory computed, a decision algorithm has been developed to warn the RSO of any potential range violation by the vehicle as well as to indicate the time left for giving the ‘Destroy’ command to the vehicle before it goes out of range.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126754121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis and Analysis of Bioceramic Material for Mitigation of Electromagnetic Interference in Radar Communication 抗雷达通信电磁干扰生物陶瓷材料的合成与分析
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069651
S. Garnayak, S. P. Mishra, P. Mishra, G. Nath
{"title":"Synthesis and Analysis of Bioceramic Material for Mitigation of Electromagnetic Interference in Radar Communication","authors":"S. Garnayak, S. P. Mishra, P. Mishra, G. Nath","doi":"10.1109/ICORT46471.2019.9069651","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069651","url":null,"abstract":"Reduction of radar cross section is an important aspect in radar technology. The radar absorbent material (RAM) plays significant role in reduction of radar signature by mitigation of radio wave interference used in ships, helicopters, tanks and transport planes. Bio ceramic material composed of china clay and carbon rich waste rice husk ash possesses good dielectric loss for frequency 10 GHz and reflection loss −20 dB which is quite significant for stealth technology. Scanning electron microscopy (SEM) study shows good dispersion of rice husk ash in the epoxy matrix. Frequency dependence of both dielectric constant and dielectric loss are measured in the X band frequency range (8.2GHz-12.4GHz). This low cost laboratory scale synthesized RAM find its application in designing of stealth aircraft and jet fighter for military purposes.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117194435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
1 KW GaN HEMT Based Power Amplifier in UHF Band 基于UHF频段的1kw GaN HEMT功率放大器
2019 International Conference on Range Technology (ICORT) Pub Date : 2019-02-01 DOI: 10.1109/ICORT46471.2019.9069633
Ashish Jindal, Umakant Goyal, Archana Ahirwar, Parul Gupta, S. Tomar, M. Mishra, S. Vinayak
{"title":"1 KW GaN HEMT Based Power Amplifier in UHF Band","authors":"Ashish Jindal, Umakant Goyal, Archana Ahirwar, Parul Gupta, S. Tomar, M. Mishra, S. Vinayak","doi":"10.1109/ICORT46471.2019.9069633","DOIUrl":"https://doi.org/10.1109/ICORT46471.2019.9069633","url":null,"abstract":"In this work, design and implementation of GaN HEMT based 1 KW linear power power amplifier in UHF band (400–450 MHz) has been presented. The designed system consists of four stages with overall small signal gain of 70 dB and delivers 60 dBm output power at an input power of −10 dBm.","PeriodicalId":147815,"journal":{"name":"2019 International Conference on Range Technology (ICORT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129393708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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