• Title/Summary/Keyword: multi-static Radar

Search Result 8, Processing Time 0.026 seconds

A Case Study on Reliability Test of Embedded Software in the Multi-Function Radar (다기능레이더 소프트웨어 신뢰성시험 적용사례 및 결과)

  • Kim, Jong-Woo
    • Journal of IKEEE
    • /
    • v.19 no.3
    • /
    • pp.431-439
    • /
    • 2015
  • This paper introduces analysis technique and test procedure for verifying the reliability of the multi-function radar software. Also the process of software development and reliability test method for reducing the development period are described. Test results show that the verified software has reduced errors and improved reliability compared to the unverified software.

A Study on Radar Waveform - Polyphase Sequence (레이더 파형 연구 - 다위상 시퀀스)

  • Yang, Jin-Mo;Kim, Whan-Woo
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.13 no.4
    • /
    • pp.673-682
    • /
    • 2010
  • This paper describes and analyzes a various generation methods of the mutually orthogonal polyphase sequences with low cross-correlation peak sidelobe and low autocorrelation peak sidelobe levels. The mutual orthogonality is the key requirement of multi-static or MIMO(Multi-Input Multi-Output) radar systems which provides the good target detection and tracking performance. The polyphase sequences, which are generated by SA(Simulated Annealing) and GA(Genetic Algorithm), have been analyzed with ACF(Autocorrelation Function) PSL(Peak Sidelobe Level) and CCF(Crosscorrelation Function) level at the matched filter output. Also, the ambiguity function has been introduced and simulated for comparing Doppler properties of each sequence. We have suggested the phase selection rule for applying multi-static or MIMO systems.

Clock Synchronization for Multi-Static Radar Under Non-Line-of-Sight System Using Robust Least M-Estimation (로버스트한 최소 M-추정기법을 이용한 비가시선 상의 멀티스태틱 레이더 클락 동기 기술 연구)

  • Shin, Hyuk-Soo;Yeo, Kwang-Goo;Joeng, Myung-Deuk;Yang, Hoongee;Jung, Yongsik;Chung, Wonzoo
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.37C no.10
    • /
    • pp.1004-1010
    • /
    • 2012
  • In this paper, we propose the algorithm which considers applying recently proposed clock synchronization techniques with quite high accuracy in a few wireless sensor networks researches to time synchronization algorithm for multi-static radar system and especially overcomes the limitation of previous theory, cannot be applied between nodes in non-line of sight (NLOS). Proposed scheme estimates clock skew and clock offset using recursive robust least M-estimator with information of time stamp observations. And we improve the performance of algorithm by tracking and suppressing the time delays difference caused by NLOS system. Futhermore, this paper derive the mean square error (MSE) to present the performance of the proposed estimator and comparative analysis with previous methods.

3D Radar Objects Tracking and Reflectivity Profiling

  • Kim, Yong Hyun;Lee, Hansoo;Kim, Sungshin
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • v.12 no.4
    • /
    • pp.263-269
    • /
    • 2012
  • The ability to characterize feature objects from radar readings is often limited by simply looking at their still frame reflectivity, differential reflectivity and differential phase data. In many cases, time-series study of these objects' reflectivity profile is required to properly characterize features objects of interest. This paper introduces a novel technique to automatically track multiple 3D radar structures in C,S-band in real-time using Doppler radar and profile their characteristic reflectivity distribution in time series. The extraction of reflectivity profile from different radar cluster structures is done in three stages: 1. static frame (zone-linkage) clustering, 2. dynamic frame (evolution-linkage) clustering and 3. characterization of clusters through time series profile of reflectivity distribution. The two clustering schemes proposed here are applied on composite multi-layers CAPPI (Constant Altitude Plan Position Indicator) radar data which covers altitude range of 0.25 to 10 km and an area spanning over hundreds of thousands $km^2$. Discrete numerical simulations show the validity of the proposed technique and that fast and accurate profiling of time series reflectivity distribution for deformable 3D radar structures is achievable.

A Study on the Netted Radar Information Network (Jamming 효과를 고려한 Netted 레이다의 정보통합망 설계에 관한 연구)

  • 김춘길;이형재
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.17 no.4
    • /
    • pp.398-414
    • /
    • 1992
  • For designing the radar integrated data network, we construct the network structure with a spatial hierarchy decomposition scheme. The RIDN can be decomposed into several subnet classes, those of which are composed of the several group classes of radar sits, In a group class, the communication nodes of a radar site are modeled by the software modules formulated with the statistical attributes of discrete events. And we get the analysis over the network through the separately constructed infra group level models which were coded with the C language. After constructing the local area network with these infra models through the proper data links. We got the analysis of the communication performance of inner models and the global network.

  • PDF

A Study of the RCS Reduction by Pattern Synthesis for Singly Curved Structures (패턴 합성을 통한 단일 곡면 구조에서의 RCS 감소 기술에 관한 연구)

  • Kim, Woojoong;Seo, Hyeong Pil;Kim, Youngsub;Yoon, Young Joong
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.24 no.4
    • /
    • pp.366-373
    • /
    • 2013
  • This paper discusses the singly curved phased reflector for reduced RCS pattern, which has minimized RCS level at boresight with a null by phase cancelation and the lowered RCS level of main beam by splitting the main beam into multi directions. Considering the reduced level of boresight and main beam compared to the same sized reference PEC, this proposed multi-beam reflector can be adopted in the mono-static radar and the bi-static radar environment. The proposed reflector is a multi-beam reflector, which has different phase distributions at each row for different steering angle. It is designed through an intermediate stage of a single and dual-beam reflector. The behaviors of the designed reflectors are verified through full-wave simulation and experiment. The reflectors are designed in the frequency of 10 GHz and it has a size $240{\times}180mm^2$($8{\times}6\;{\lambda}^2$) with the curvature k=3.3. From the measured results, the proposed reflectors reduce the reflected power by 17 dB at boresight.

Wind Tunnel Test of Aerodynamic Forces and Wind Pressures Acting on Muilti-layer Radom in Active Phased Array Radar (풍동실험을 통한 능동위상배열레이더에서 다층레이돔에 작용하는 공기력과 풍압의 실험적 연구)

  • Yim, Sung-Hwan;Kang, Kwang-Hee;Choi, Ji-Ho;Lee, Seung-Ho;Kwon, Soon-Duck
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.17 no.1
    • /
    • pp.149-157
    • /
    • 2014
  • In this paper, we investigated the sensitivity of aerostatic force coefficients of multi-layer radom in the various wind speeds. The test was conducted in KOCED Wind Tunnel Center in Chonbuk National University, and wind speeds were in the range from 5 m/s to 26 m/s in order to determine the Reynolds number independence. The test results of present multi-layer radom were not affected by the Reynolds number, The maximum positive pressure coefficient was found to be 1.08 at the center of the front of the plane in angle of attack of 0 degree, the maximum negative pressure coefficient was -2.03 at the upper right corner in angle of attack of 120 degree, while maximum drag coefficient was 1.11 in angle of attack of 180 degree.

Design and Strength Analysis of a Mast and Mounting Part of Dummy Gun for Multi-Mission Unmanned Surface Vehicle (복합임무 무인수상정의 마스트 및 특수임무장비 장착부 설계 및 강도해석)

  • Son, Juwon;Kim, Donghee;Choi, Byungwoong;Lee, Youngjin
    • The Journal of Korean Institute of Information Technology
    • /
    • v.16 no.11
    • /
    • pp.51-59
    • /
    • 2018
  • The Multi-Mission Unmanned Surface Vehicle(MMUSV), which is manufactured using glass Fiber Reinforced Plastic(FRP) material, is designed to perform a surveillance and reconnaissance on the sea. Various navigation sensors, such as RADAR, RIDAR, camera, are mounted on a mast to perform an autonomous navigation. And a dummy gun is mounted on the deck of the MMUSV for a target tracking and disposal. It is necessary to analyze a strength for structures mounted on the deck because the MMUSV performs missions under a severe sea state. In this paper, a strength analysis of the mast structure is performed on static loads and lateral external loads to verify an adequacy of the designed mast through a series of simulations. Based on the results of captive model tests, a strength analysis for a heave motion of the mast structure is conducted using a simulation tool. Also a simulation and fatigue test for a mounting part between the MMUSV and the dummy gun are performed using a specimen. The simulation and test results are represented that a structure of the mast and mounting part of the dummy gun are appropriately designed.he impact amount are performed through simulation and experiments.