2021 2nd International Conference on Range Technology (ICORT)最新文献

{"title":"Dimensionality Reduction and Evaluation in Hyperspectral Images using LSTM Models","authors":"S. Swain, Mainak Bandyopadhyay, S. Satapathy","doi":"10.1109/ICORT52730.2021.9582080","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9582080","url":null,"abstract":"Development in the field of computer-aided learning and testing have stimulated the progress of novel and efficient knowledge-based expert systems, that have shown hopeful outcomes in a broad variety of practical applications. In particular, deep learning (DL) techniques have been extensively carried out to identify remote sensed data obtained by the instruments of Earth Observation. Hyperspectral imaging (HSI) is an evolving area in the study of remotely sensed data due to the huge volume of information found in these images, which enables better classification and processing of the Earth's surface by integrating ample of spatial and spectral features. This paper primarily deals with the Recurrent Neural Networks (RNNs), especially the Long Short Term Memory (LSTM) networks for HSI classification. Different variants of LSTM are analyzed and compared, along with other state-of-the-art models in terms of accuracy metrics using certain hyperspectral datasets. The paper concludes with the analysis of some emerging future research axes.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115393197","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}

{"title":"Ground-based Passive Radar and On-board Beacon for Airborne Target Tracking with GPS based Time Synchronization","authors":"Udaya Kumar Sahoo, S. Kundu, B. Patnaik, S. Chintagunta","doi":"10.1109/ICORT52730.2021.9581439","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581439","url":null,"abstract":"To achieve the mission objectives of range safety, it is crucial to track the flight trajectory of an airborne target during its flight. Flight instrumentation systems like ground-based radar and on-board transponders are used to track the trajectory of airborne targets. In general, radar transmits a microwave signal to the target, and the transponder in the airborne targets retransmits an encoded microwave signal towards the radar and obtain the range using the round-trip radar range equation. However, this technique involves high-power microwave transmitters that use a large amount of electrical power from hundred kilowatts to few megawatts at peak to meet the link margin requirement. The transmitter deals with very high voltages and tubes, so they often become vulnerable to electrical and microwave damages to the system as well as the environment. It also reduces the reliability and increases the operation and maintenance cost of the radar. In this article, we propose a method using ground-based passive radar and transmitter-enabled onboard radio beacon. In the proposed approach, the airborne targets and passive radars are equipped with dual-band GPS receivers being synchronized with the GPS time to determine the timestamp of transmission and reception of radio pulses at the radar end. The beacon transmits a time-synchronized pulse width modulated signal from the on-board of a target to the passive radar to determine the range using a one-way radar range equation. The proposed method overcomes the requirement of huge electrical power and related issues in the radar. It also optimizes power usage and improves the power security of airborne targets by eliminating the involvement of high-power radio transponders. It also enhances the payload capacity of the airborne target with low weight and compact beacons instead of bulky and heavy transponders. An experimental prototype has been implemented using a drone as the airborne target to evaluate the feasibility and accuracy of the proposed method.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114536372","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}

{"title":"Survey on Ground to Air Communication:-Technical and Logistics Challenges, Recent Advancement and the Future","authors":"Komal Gaikwad, Rajesh Kumar, C. A. Jayprakash","doi":"10.1109/ICORT52730.2021.9582042","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9582042","url":null,"abstract":"The efficient Air Traffic Control system establish a strong communication network. All airborne objects should be able to communicate with a ground control room irrespective of the countries the airborne abject belongs to. Similarly increasing air traffic imposes a performance demands on the RF components. This paper addresses the RF challenges in the present ATC system along with Radiofrequency spectrum utilization, voice quality, and channel access techniques. Paper refers to the problems and the appropriate observational solutions. Also the test analysis of LDACs for building the Future Communication Infrastructure (FCI) along with an security protocols for an effective ATC system.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128225959","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}

{"title":"Performance Analysis of FSO for Different Modulation Techniques under Atmospheric Turbulence with Pointing Errors","authors":"Vinod Kiran Kappala, Jayashree Pradhan, Manish Sahu, A. K. Turuk, S. Das","doi":"10.1109/ICORT52730.2021.9581438","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581438","url":null,"abstract":"Free space optics (FSO) gained significant importance for extremely large bandwidth, unlicensed spectrum and low power secure communication. Despite the advantages, it is deeply impacted due to fog weather conditions and atmospheric turbulence. In this paper, different modulation schemes under the presence of pointing errors which are induced due to misalignment and atmospheric turbulence channels are analyzed. Under this channel condition, 16-PPM provided better performance compared to the other schemes, the performance is evaluated under weak to strong turbulence channel is also analyzed, the performance of FSO degrades with the influence of pointing errors. The performance of the system is evaluated in bit error rate (BER). This forms the basis for adaptive modulation technique according to channel condition.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125899579","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}

{"title":"Compact Test Range with improved reliability - A Case Study","authors":"P. Mohanty, G. Sadhukhan","doi":"10.1109/ICORT52730.2021.9582147","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9582147","url":null,"abstract":"This article explains the concept of designing a compact test range with minimum sensor configuration for test and evaluation of flight vehicles for improved accuracy and reliability. All aerial flight vehicles has to be validated for its intended use before their induction using test range with accurate sensors viz Electro-optical Tracking Systems (EOTS), RADAR & Telemetry and various other supporting instruments. A typical test range needs minimum configuration of sensor deployment. Various configurations have been consolidated for making of perfect Test Range. A compact Test Range with minimum infrastructure and instrumentations is discussed. A detailed analysis is also made to obtain accurate results and improved range reliability for determining the performance of the aerial target. Concept of using Laser Range Finder (LRF) with Infra Red (IR) imager is introduced for better measurement accuracy. The minimum configuration of a Test range should have RADAR with LRF or IR sensor and one LRF with IR sensor. Telemetry with IR sensors is also proposed. It is also depicted that the more the number of sensors, better will be the reliability of the results from the Test Range.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130122721","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}

{"title":"Scalabel & Modular Circular Polarized Antenna Array for Digital Beamforming Applications","authors":"Rajesh Chivukula, Tanuja VijayKumar","doi":"10.1109/ICORT52730.2021.9581664","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581664","url":null,"abstract":"Range telemetry applications are evolving over time from single target tracking to multiple simultaneous target tracking applications. In such scenarios, having a single antenna array to form simultaneous multiple beams provides great advantages in terms of extremely reduced cost of installation, saving time on calibration procedure and quick turnaround time for deployment. This paper outlines the simulation studies and development of an advanced scalabel S-band array antenna designed for digital multi beam forming over a wide scan angle (+/- 60°) for digital beamforming applications. The simulated results show that the antenna achieves a realized bandwidth of ~6% of the centre frequency across the entire scan region with a circular polarization (CP) axial ratio of < 2.5dB, a scan loss of ~ 3dB and cross-pol of better than 27dB upto +/-45° scan and better than 20dB upto +/-60° scan over the band of operation. Measured radiation patterns showing simultaneous digital beam formation of two beams at two different scan angles is also presented.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128980925","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}

{"title":"A review of different Sparse Arrays for DOA estimation using Subspace based algorithm","authors":"Rajen Kumar Patra, A. Dhar","doi":"10.1109/ICORT52730.2021.9581714","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581714","url":null,"abstract":"In this paper, a detailed review is carried out for different sparse array structures for direction-of-arrival (DOA) estimation. We know that there are different sparse arrays like the minimum redundancy array, minimum hole array, nested array, supernested array, coprime array, Cantor array etc. for DOA estimation. Here, we employ the spatial smoothing MUltiple SIgnal Classification (MUSIC) algorithm for DOA estimation. The spatial smoothing technique can be applied to the hole-free part of the difference coarray of the sparse array. We discuss the configuration of each of these arrays and look into the main properties of the arrays with their advantages and disadvantages. We also analyze the environment in which a particular array can be used to give its optimum performance. We then carry out the simulations to compare the performances of the arrays.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124437762","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}

{"title":"Polyphase Good Code Sets Based on Symmetrical and Anti-symmetrical Segments of Linear/Piecewise Linear FM Waveforms","authors":"Ravi Kadlimatti, Shivank Jha, Akash Bhandari","doi":"10.1109/ICORT52730.2021.9581865","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581865","url":null,"abstract":"Polyphase good code sets based on triangular FM waveforms consisting of linear FM (LFM) and piecewise linear FM (PLFM) segments are introduced. The triangular FM based polyphase codes are constructed from symmetrical and antisymmetrical segments of LFM and PLFM codes. This results in a set consisting of double the number of codes compared to the set obtained by changing only the slopes of the LFM or PLFM segments while preserving the cross-correlation properties of the set. Design of several such sets is discussed and their correlation properties compared. It also shown that extended matched filters for the LFM/PLFM could be used to enhance the Doppler tolerance and detection capability of the codes. The proposed good codes sets could be used for MIMO radar and netted radar applications.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134152260","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}

{"title":"Integrated X Band Active Phased Array Radar for Maritime Surveillance","authors":"R. Raghu, Nanditha Unnikrishnan, B. S. Kalyani, R. Rajesh, Reena Sharma","doi":"10.1109/ICORT52730.2021.9581760","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581760","url":null,"abstract":"Airborne maritime surveillance plays an important role in safeguarding the coastline and exclusive economic zones. A multi-functional Maritime Patrol Radar (MPR), which can provide 360 degree azimuth coverage and operate in various modes like sea surface surveillance, Synthetic Aperture Radar (SAR), Inverse SAR (ISAR), Search-and-Rescue, Weather etc., is crucial for providing an effective maritime situational awareness. The performance of such systems are usually limited by sea clutter and aperture constraints imposed by the aircraft. Unlike the older generation mechanical radar, MPR based on Active Electronically Scanned Array (AESA) can overcome these limitations with its capability in instantaneous beam steering, spacetime agility etc. This paper performs an extensive simulation study on sea-clutter, derives the optimal system parameters and defines a prototype Integrated X-band Active Phased Array Radar (IXAPAR). Each building block of IXAPAR has been designed using state-of-the-art technology. Finally, we report the performance results of the IXAPAR including opportune target detection, with various advanced digital domain processing like Extended Target CA-CFAR, digital monopulsing, simultaneous multi-direction looks using digital beamforming and jammer cancellation. The prototype IXAPAR can be easily scaled up based on various airborne and ground based applications.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131814051","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}

{"title":"Implementation of a Count Down Timer on RTOS Platform for Test Range Applications","authors":"C. Rajak, Soumitra Ray, Biswajit Biswas, A. Shrivastava","doi":"10.1109/ICORT52730.2021.9581814","DOIUrl":"https://doi.org/10.1109/ICORT52730.2021.9581814","url":null,"abstract":"There are multiple industrial and scientific applications which demand high end computations and involve complex input-output interfaces. These mission critical applications must be completed reliably within specified time deadline and must run without any interruption for long durations. These types of application cannot be implemented on a general purpose computer system. Therefore for such application Real-Time operating systems with specialized hardware is an essential requirement. In present work a mission critical Count Down Time generation application has been implemented on a Real-Time operating system with specialized hardware. Real-Time system based CDT generation systems are used for launch of flight vehicles in a Test Range. Performance evaluation of this CDT generation system will be presented here.","PeriodicalId":344816,"journal":{"name":"2021 2nd International Conference on Range Technology (ICORT)","volume":"469 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123032510","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}