Issue 2,2010 Table of Contents

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  • 1  Review of SAR Oceanic Remote Sensing Technology
    ZHU Min-hui
    2010, 32(2).
    [Abstract](2542) [HTML](0) [PDF 0.00 Byte](24)
    Abstract:
    Based on the research importance and main performance of SAR oceanic remote sensing technologies,the key aspects on maritime surveillance used by SAR technology are reviewed in this paper.Focusing on randomness and time-variation of ocean environment state,we study the ocean surface microwave scattering property and its SAR ocean surface imaging mechanism.The main research results are presented.To meet the requirement of SAR oceanic observation,the important features of the SAR system including wide observa...
    2  Two-dimensional Optimal Sensors Placement for Passive Location System Using Three Aircrafts
    JIA Xing-jiang ZHOU Yi-yu GUO Fu-cheng
    2010, 32(2).
    [Abstract](2382) [HTML](0) [PDF 0.00 Byte](6)
    Abstract:
    For optimal two-dimensional(2-D) sensors placement for 3-aircraft passive location system,a method based on maximum area principle is proposed.In this paper,3-aircraft time difference of arrival(TDOA) location,frequency difference of arrival(FDOA) location and hybrid TDOA/FDOA location are taken as examples.First,the basic description of passive location models is given.Then,the concept of effective location region is introduced based on Cramer-Rao Lower Bound(CRLB).Besides,the principle of maximum effectiv...
    3  Analysis of Detection Performance of Radar System Network under SOJ Interference
    WANG Lian-rong XU Rui-lai GUAN Cheng-bin
    2010, 32(2).
    [Abstract](2439) [HTML](0) [PDF 0.00 Byte](6)
    Abstract:
    The detection probability distribution of radar system based on K rule and Neyman-pearson rule is studied through constructing a detection probability distribution model of radar under SOJ interference.Simulations of the detection probability distribution are given and the fusion performances of the two rules are analysed and compared.The results show that detection probability distribution of radar system overcomes the limitation of conventional method which uses detection probability of a single space pos...
    4  Simulation Analysis of Navigation and Location Errors in Airborne Radar Network
    PENG Jin-long ZHANG Ce WU Jing
    2010, 32(2).
    [Abstract](2267) [HTML](0) [PDF 0.00 Byte](1)
    Abstract:
    Airborne radar network have superiority of both radar network and maneuverability.But obtaining the exact data of navigation and position of airplane in network is important.First,the mechanism of how the errors of navigation and position in airborne radar network produce the target position error is analysed in this paper,then by simulation,we obtained the relationships between target position errors and navigation and position errors in airborne radar network.After that we got the significant conclusion t...
    5  A Study on the Power Property of Barrage-type Jamming to Bistatic SAR
    LIU Fang WANG Jian-guo
    2010, 32(2).
    [Abstract](2294) [HTML](0) [PDF 0.00 Byte](1)
    Abstract:
    In this paper,from the interference equation of Bi-SAR,the product of parameters such as transmitting power etc,which are related to the transmitter is equated to the echo power intensity detected by the jammer,and the interference equation(J/S) is simplified.We derived the coverage area of J/S contours under the condition that J/S reached a feasible value.Then the characteristics of the area and its relationship with jammer parameters are analyzed.Finally,we discuss the relations among the value of J/S,the...
    6  Design of Space-borne Radar Waveform Based on Minimum Average Energy Expenditure Criteria
    HE Song-hua HUANG Da-hua CHEN Wei-bing ZHANG Jun
    2010, 32(2).
    [Abstract](2297) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    In this paper,a novel method of determining the optimized separation of detection range of different mode and computing the signal waveform parameters is presented for long-range multi-mode space-borne radar target tracking application.Energy expenditure is used minimally with given minimum detection range,maximum detection range and tracking mode number.A practical technical solution is given for new kind of space-borne radar operating mode and waveform design.Theoretical analysis and simulation showed the...
    7  Analysis of Dominant Construction Factors of Foreign Electromagnetic Fences
    GUO Wei CUI Hai-ying
    2010, 32(2).
    [Abstract](2396) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    The growing number of space debris brings serious threats to spacecraft and limited orbit resources,and the electromagnetic fence is a powerful measurement equipment for space debris in medium and low earth orbit.In order to analyze the dominant construction factors of foreign representative electromagnetic fences in detail,the U.S Navy Spasur System and the French Graves are introduced.The main influence factors on their operating performance difference are analyzed and their advantages are summarized in t...
    8  Radar Signal Sorting Method Based on Set Pair Analysis
    ZHANG Xiu-hui LIU Yi-an CAO Ning-sheng LI San-quan
    2010, 32(2).
    [Abstract](2447) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    With the new system and technique radars developing rapidly,the radar signals received by the radar reconnaissance receiver are more intensive and complicated.Traditional radar signal sorting methods can't sort these signals effectively.A method using set pair analysis is presented in this paper.Radar pulse and known characteristics of radar pulses were regarded as one set pair to achieve signal sorting by calculating the correlation of the pulse signal with set pair analysis algorithm.Simulation results in...
    9  A Fast High Frequency Algorithm for Predicting Wide Band Radar Signal
    WANG Hai-bin JIN Lin YANG Zheng-long LI Da-sheng
    2010, 32(2).
    [Abstract](2389) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    A fast novel method is presented,that combines SBR and EEC techniques with radar chirp signal processing.This fast method gives an order of magnitude speedup in computation time compared with conventional methods.With the wide radar signal data obtained by this method,range profiles and ISAR images are obtained,which validated the accuracy and efficiency of this fast method.
    10  Symbol Timing Estimation of the Uplink for OFDMA Systems
    WANG Yan-li LI Wen-ming
    2010, 32(2).
    [Abstract](2272) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    In multi-path channels,any change of symbol timing will increase the sensitivity to delay spread for OFDMA systems.In order to obtain optimum performance of systems,the error of symbol timing synchronization should be reduced as much as possible.Currently,most of the symbol-timing-estimation algorithms are based on training sequences.The advantages of these algorithms are that their implementations are simple,and relatively accurate.However,they also need more spectrum resources,and the timing offset should...
    11  Application of Data Fusion in Airborne Early Warning Radar
    WANG Feng XIE Yan-min ZHANG Yi
    2010, 32(2).
    [Abstract](2347) [HTML](0) [PDF 0.00 Byte](3)
    Abstract:
    The main computer software configuration and functions of airborne early warning radar software are introduced.The control and information flow chart of airborne early warning radar software are given.The functions of radar software and JDL-USER fusion model are analyzed and compared.The design framework of fusion software is presented and its modules and function requirements are introduced.The fusion software processing and the track fusion algorithm are described,and the function of radar track fusing wi...
    12  A Biparametric Cell-averaging CFAR Detector in Sea Clutter Background
    WU Nan XU Yan-guo LI Zong-wu
    2010, 32(2).
    [Abstract](2577) [HTML](0) [PDF 0.00 Byte](10)
    Abstract:
    A model for the amplitude statistics of radar sea clutter is introduced,and it is shown that for the same threshold coefficient,the probability of false alarm in spiked sea clutter is obviously higher than that in noise.Then the configuration map of a biparametric cell-averageing(CA-CFAR) detector is proposed,and the performance of this detector is analyzed by simulation.Finally,the real data detection results processed by the biparametric CA-CFAR detector and the traditional CA-CFAR method are compared.For...
    13  A T Difference Smoothing Fast Algorithm for DOA Estimation
    ZHANG Lu-you ZHANG Yong-shun XU Jia-han
    2010, 32(2).
    [Abstract](2481) [HTML](0) [PDF 0.00 Byte](24)
    Abstract:
    For the need of coherent signal source DOA estimation in the presence of unknown non-stationary noise,a T difference smoothing fast(TDSF) Algorithm is proposed.According to the diagonal-dominated characteristic of non-stationary noise,a T matrix was constructed in this algorithm,which does the difference smoothing operation on the data covariance matrix.This algorithm can both resolve the correlated and uncorrelated signal sources.The algorithm adopts power iteration method to get the noise subspace,doesn't...
    14  Wald Detection Method of ARM in Gaussian Mixed Clutter Distribution
    FANG Qian-xue b WANG Yong-lianga WANG Shou-yongb
    2010, 32(2).
    [Abstract](2328) [HTML](0) [PDF 0.00 Byte](3)
    Abstract:
    In this paper,a Wald detection method is proposed to detect the anti-radiation missile(ARM) in Gaussian mixed clutter distribution.When we estimate the distribution parameters with the expectation maximization(EM) iterative algorithm,the iterative algorithm may end due to initialization trap and lead to error estimation if there is not an appropriate initialization.So a moment-EM algorithm is suggested to estimate the parameters.The Wald decision rule of the detection of ARM target under gaussian mixed clut...
    15  Interacting Multiple Model Algorithm Based on Square-root Central Difference Kalman Filter
    XIA Zhong-ting WANG Sheng-li WU Yang
    2010, 32(2).
    [Abstract](2523) [HTML](0) [PDF 0.00 Byte](3)
    Abstract:
    This paper presents a SRCDKF based IMM algorithm,which can effectively deal with maneuvering target tracking problems in practice.This algorithm performs better in terms of tracking stability,converging speed and numerical precision than those methods such as EKF based IMM algorithm,and also avoids computing complicated Jacobi matrix.Numerous monte carlo simulations indicate that our algorithm is both effective and efficient.
    16  Analysis of the Performance of the GBR-P Antenna
    FEI A-li ZHU Rui-ping MA Jing
    2010, 32(2).
    [Abstract](2338) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    The Ground Based Radar(GBR) in American NMD system is one of the commanding heights in the development history of the world's radar in terms of both the level of the technology and the complexity of the configuration.Its functions are also self-contained.From the existing domestic and foreign literatures and photographs,combined with the problems faced in the application of the large-scale aperiodic phased array,this paper analyzed the performance,array arrangement method,choice of element,beam control meth...
    17  A Study on the Influence of Rotation Speed Undulation on Drive System of Radar Pedestal
    GU Ji-feng DUAN Yong-jun PING Li-hao YANG Guo-lai
    2010, 32(2).
    [Abstract](2326) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    为了更深入研究齿轮、轴承系统动力学问题,特别是研究其结构和几何参数对其动力学性能的影响,文中结合实际应用需要,基于某机载雷达天线座传动系统,着重考虑齿轮啮合时的时变刚度、齿轮侧隙以及轴承支撑刚度、摩擦等因素,建立了齿轮、轴、轴承动力学模型,运用数值仿真方法,研究了上述因素对其转速波动的影响.根据上述参数改变对转速波动影响的分析可知,当结构参数调整到一定值时,对转速波动的影响就不再有很大的变化,趋于平稳,此时若再继续调整结构参数就会浪费空间尺寸及重量,尤其是重量和空间都较为苛刻的机载产品,这对齿轮、轴承系统优化设计提供一定的理论依据和方法.
    18  A Method of Polarization Control on Wave Monitoring Radars
    ZHU Xiao-zhang CHEN Zhu-ming WANG Xue-gang
    2010, 32(2).
    [Abstract](2319) [HTML](0) [PDF 0.00 Byte](2)
    Abstract:
    Wave monitoring radar is a kind of radar which uses the back scattering image of ocean surface to measure and monitor waves.To satisfy the need of dual polarization switching,this paper analyzed the characteristics of the servo system in marine radar,discussed several ways of controlling the polarization switching,chosed and implemented a novel,stable and effective method in which the hall-effect is employed.This method transmits the control command and the feedback signal by using several electromagnets an...
    19  Design of a Ultra-wide Band Low Switching Time Stepped-frequency Signal Generator
    WANG Hua LU Bi-ying ZHOU Zhi-min
    2010, 32(2).
    [Abstract](2306) [HTML](0) [PDF 0.00 Byte](1)
    Abstract:
    A frequency synthesis concept based on direct digital synthesis(DDS)and direct synthesis(DS)technology is suggested,as it is difficult for the current frequency synthesis method to generate a wideband and high-speed frequency hopping signal.The basic principle,design method and test result are provided.A 1.5 GHz stepped-frequency signal generator is realized,with its frequency hopping interval less than 50 ns.It could be easily realized and the performance is good.
    20  Integrated Design of Multifunctional Solid-state Transmitter
    ZHOU Bin WANG Wei-hua ZHENG Xin
    2010, 32(2).
    [Abstract](2486) [HTML](0) [PDF 0.00 Byte](4)
    Abstract:
    A multifunctional solid-state transmitter is introduced in this paper.A few issues are discussed,including multifunctional requirements of the solid-state transmitter,different transmitter schemes,composition and principle of the solid-state transmitter modules,and key technical difficulties of the transmitter.Transmitting low sidelobe of active phased array radar antenna is a notable feature of the transmitter.Transmitting low sidelobe can be realized by using distributed,amplitude weighted transmitter mod...
    21  Test Parameters Setup of Shock Response Spectrum
    LIU Ji-cheng HUANG Guang-ping
    2010, 32(2).
    [Abstract](2371) [HTML](0) [PDF 0.00 Byte](3)
    Abstract:
    SRS test simulates the complex shock environment conditions a military equipment is likely to encounter during its service life-cycle more precisely than classical shock test.This paper introduces the basic concepts of SRS,describes the parameters setup method of SRS test and discusses the influence of different setup on test.Example test result shows that accurate SRS can be achieved using the described setup method.
    22  A Study on Cloud Echo Interference with Monopulse Radar
    GUO Yong-kang FANG Hua-jin YU Xue-ming GUO Ke-cheng
    2010, 32(2).
    [Abstract](2328) [HTML](0) [PDF 0.00 Byte](3)
    Abstract:
    Receiver and transmitter of monopulse radar are worked at the same frequency.This character of monopulse radar,receiving frequency is the same with emissive frequency,bings various echo interferences to radar.In planning of monoplulse radar,the reflected electromagnetic wave,which is come from the immediate vicinity of radar,has been considered.But the radar lacks a method to avoiding interference of the familiar cloud echo.In a cloudy or rainy day,the cloud echo would interfere with the radar's working.Thi...
    23  Analysis of False-target Deception Jamming for Doppler Weather Radar
    LU Jing LU Hong-tao MENG Bo GUO Ke-cheng
    2010, 32(2).
    [Abstract](2374) [HTML](0) [PDF 0.00 Byte](12)
    Abstract:
    Doppler weather radar is a sort of PD radar of weather detection using doppler effect between scattering particle and radar.First,false-target deception jamming of doppler weather radar is analyzed by simulation in this paper.Then,a new way of false-targets deception jamming is presented on the basis of image weather radar's rationale.

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