Issue 10,2015 Table of Contents

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  • 1  Application and Development of Multi鄄function Integrated Technique in Testing Range
    SUN Guozheng
    2015(10):1-4.
    [Abstract](2688) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    Based on the construction demand of the integration of campaign and test in the informative testing range, the crucial tech nique is analyzed in this paper by contrast with the development of foreign multi-function integrated technique. Moreover, the application demand of the integrated technique and developing tendency of military range equipment is proposed in this paper at last.
    2  Quantitative Description of Anti-active Jamming Ability for Ground Information Radar
    HU Jin LI Jianxun LIU Xiao
    2015(10):5-10.
    [Abstract](2855) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    The unitized and systematized quantitative description of radar's overall anti-jamming ability is proposed, which is based on the summary of typical active electronic jamming scenario and jamming pattern of the ground information radar. The tactical and tech nical index for quantitative describing radar's overall anti-jamming ability is constructed based on three scenarios, i. e. , main lobe jamming, side lobe jamming and combined jamming, which is also independent of particular jamming pattern and anti-jamming meas ures. The definitions, boundary conditions and application scope of the constructed index are provided, based on which the universal quantitative description of the jamming scenario irrelevant radar's overall anti-active jamming ability is extracted and purified.
    3  The Effect and Meaning of Software Ability Integration to Shipborne Electronic Equipment
    CHEN Feng WANG Jin LV Chengyue
    2015(10):11-13.
    [Abstract](2778) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    With bigger scale of large electronic equipment and higher systematic program in the future, there are limitations on the continuity, openness, transportability and extendibility of equipment research and development for traditional model. Based on the generic hardware platform and software frame, function implemented by software of electronic equipment is realized through software defined radio(SDR), and the problem of system capability integration for large electronic equipment is solved. Probability analysis is made through electronic technology support, technical management, engineering research and organization and whole-life maintenance, which could be applied during the process of development of large scale electronic equipment.
    4  A Method of Synthesizing Range Profile Based on LFM -BPSK Signal
    CHEN Hangyong ZHANG Dianzong
    2015(10):14-17.
    [Abstract](2751) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    In allusion to the design of a sharing signal for radar imaging and communication in integrated radar and communication system, a general design mode is analyzed for integrated signal. First, an integrated radar and communication signal is designed based on LFM-BPSK modulation, which can transmit with communication information phase modulation. The expression is given for the echo signal from an extended target. Secondly, by way of computing inverse discrete Fourier transform or discrete Fourier transform of echo signal sample, a method of synthesizing range profile is proposed based on integrated signal. Then, according to the effect of phase factor on fourier transform, the influence of Doppler effect on synthesizing range profile is analyzed for the new integration signal. Finally, some simulation is provided for verified the theoretic analysis in radar imaging performance of the new signal.
    5  Optimal Design of Window Function for LFM Signal Low-sidelobe Pulse Compression
    SHI Weiyuan LIN Zhengying CHEN Xixin
    2015(10):18-20.
    [Abstract](2771) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    The sidelobes of pulse compression (PC) of linear frequency- modulated (LFM) signal sometimes cannot be lowered sufficiently via the usual window functions because the amplitude spectrum of LFM signal is not of the standard rectangular shape. An optimal design approach to the window function of LFM signal low-sidelobe PC is presented in this paper. In this approach the window function making the PC sidelobes as low as possible is found via the standard second-order cone programming under the constraint that the difference between the PC mainlobe of designed window and that of the desired window is less than some given value. The simulation example shows that the PC sidelobes of designed window are remarkably lower than those of Hamming window,the constrained part of PC mainlobe of designed window is widened, and the PC SNRs of two window functions are almost same.
    6  TOA Location System Performance Test Based on Multichannel Vector Signal Generator
    LI Wenchen
    2015(10):21-24.
    [Abstract](2651) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    The TOA location system testing is the key component of system performance evaluation. In order to test the complicated electromagnetic signal environment adaptability of TOA location system, the semi-physical simulation scheme was used to build the testing multiple signal source and the multipath signal environment. The TOA location base station received signal of determinant location situation was built by the multichannel vector signal generators. In this paper, the four stations TOA location testing environment was built based on the double鄄channel vector signal generators R&S SMW200A and two vector signal generators R&S SGS100A, based on which the system performance parameters such as time difference testing accuracy, TOA location accuracy and complicated electromagnetic signal environment adaptability were tested.
    7  Inter-pulse Multi-carrier Modulated Signal Carrier Estimation Algorithm Based on Comprehensive Spectrum
    WU Zhenxing LUO Jingqing RUAN Huailin
    2015(10):25-28.
    [Abstract](2749) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    A kind of carrier frequency estimation for inter-purle multi-carrier modulated signal is mentioned in this paper. By analysis the characteristics of signal's spectrum and instantaneous frequency spectrum, a method of multi-carrier frequency estimation is given. Through this method, FSK signal and mixed coding signal's carrier frequency and the correspondence between carrier frequency and time can be estimated. The error factors estimation algorithm is analyzed and simulation results show the effectiveness of the algorithm.
    8  A Method of Parameters Estimation for MIMO Radar Orthogonal QPSK Signal
    LI Yunhao WANG Pei TANG Bin
    2015(10):29-33.
    [Abstract](2834) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    Based on cyclic autocorrelation, a method of parameters estimation for orthogonal QPSK signal used by MIMO radar is proposed in this paper. Firstly, cyclic autocorrelation function and cyclic spectrum density of orthogonal QPSK signal are deduced. According to the deduction, estimation of carrier frequency is accomplished through searching the cyclic spectrum density for the location of the maximal value. Then, cyclic autocorrelation functions of different time delay are accumulated to complete estimation of code frequency. Simulation results verify that the proposed method could achieve accurate parameters estimation when SNR is better than 1 dB.
    9  A Study on the Method of T-Rn Type Multi-station System Cooperating Target Localization Based on Information-level
    CAO Jinlong WANG Xing CHENG Siyi ZHOU Dongqing
    2015(10):34-38.
    [Abstract](2794) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    An information-level T-Rn type cooperating target localization method of the multi鄄station system is proposed in this paper, in which the concrete process is expounded of this kind of localization way. Firstly, single receivers complete the localization according to time-difference-direction-measurement information. Then, the center station applies the weighted least squares(WLS) to merge together the localization results of the four receivers. After deducing the ranging and localization error formulas, several factors affecting the localization precision are analyzed while geometrical dilution of precision (GDOP) is applied to analyze the localization error and the theoretical lower bound of error performance is deduced. It is demonstrated in the simulating experiment that the localization precision of the center station is much higher than that of a single receiver, reaching the Cramer-Rao lower bound(CRLB) of the error, having a kind of engineering applying value.
    10  A Study on Parallel Data Management Framework of Multi-radar Data Fusion
    SHI Yanlong WANG Xue LU Xiaoke
    2015(10):39-42.
    [Abstract](2837) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    Data management is one of the key factors in multi-radar data fusion. As the process capacity increased rapidly, the framework of serial data management cannot satisfy the requirements of data fusion any more. In this paper, a framework of parallel data management model is presented, and an OpenMP method of parallel technology is used to implement it. Simulation show that the parallel data management framework use to data fusion obtain a good speedup, it can satisfy the large scale multi-radar data fusion and has a good scalability.
    11  Angle Measurement Algorithm of Omnidirectional Detection System Based on Interferometer
    ZHAO Huaikun ZHANG Rongquan WANG Shengao
    2015(10):43-45.
    [Abstract](2656) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    Based on the principle of interferometer angle measurement, an omnidirectional meter-wave radar antenna and its related angle measurement algorithms are provided in this paper. Unlike traditional large and poor maneuverable antennas, the new antenna had small size and simple structure, and the algorithms were simple and high accurate. In addition, the paper designed the algorithms' signal processing flow, and presented the simulation results of angle error on different SNRs, which proved the algorithms' effectiveness.
    12  Design of X-band Wide-angle Scanning Phased Array Atenna
    ZHENG Gui WANG Jian SI Haifeng LIU Huatao MA Shijuan
    2015(10):46-50.
    [Abstract](2853) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    An X-band wide-band wide-angle scanning phased array radar antenna is designed, and Vivaldi antenna is used as the element of the array . Considering the mutual coupling effect between array units, 9*9 array is simulated and analyzed. Working in a bandwidth of 40% , active VSWR of the array is less than 2, and satisfies a symmetric pattern with 3 dB beam width better than 120degree and 110degree in the E-plane and H-plane, respectively. A 9*9 array antenna is fabricated and measured, the test result shows that the antenna array has a good characteristic of wide-band wide-angle scanning. Because of the simple structure and light weight, the array has a great application value in phased array.
    13  Design of Active Phased Array Antenna Swift Detection System
    LIU Jingran WANG Xing CHENG Siyi ZHAO Liang
    2015(10):51-55.
    [Abstract](2839) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    The intact-parameter detecting method of the airborne EW system's active phased array antenna comprises complicated steps while consumes considerable time. The novel antenna-detecting method is proposed in this paper, which can realize the auto- matic detection of the active phased array antenna and largely accelerate the parameter measurement of the antenna pattern, is designed based on the beam-agility characteristics of the active phased array antenna. An improved grey relevancy data鄄analyzing algorithm (GRA) is applied to perform the swift calculating and fault-cause analysis to the measured parameter sets. Technical supports to the studying, developing and detecting of the airborne EW system's active phased array antenna is provided.
    14  Design of X-band Broadband Slow-wave Delay Line
    WANG Hui YANG Ge ZHANG Hualin WANG Qi LI Shuliang
    2015(10):56-59.
    [Abstract](2863) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    A design of broadband slow-wave delay line performed in X-band is presented. Basic concepts of the slow-wave delay line are introduced. The layout of the branch length, branch spacing distance, branch width and bend shape are optimized by using electromagnetic simulate software. Miniaturization structure is realized and broadband performance is enhanced. Simulation and experimentation prove that meander line can achieve high delay efficiency up to 200£¥ , low port reflect coefficient less than -25 dB and phase linearity in band less than 8 degree, in contrast to conventional trace forms.
    15  Design and Simulation of C-band T / R Module on ADS
    NI Henan GU Yingyan
    2015(10):60-64.
    [Abstract](2770) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    The T/ R module is the core part of active phased array radar. For space-borne, airborne and shipborne platforms, how to design a miniature, highly reliable T/ R module suitable for mass production is very important. The introduction of Agilent ADS software in early stages can effectively shorten the design cycle and improve the design efficiency. A kind of C -band T/ R module is presented in this paper, using a variety of monolithic microwave integrated circuit chips to realize the function of each part. The self-excited problem of amplifier is discussed and the solutions are presented. Transmitting and receiving function in C-band is realized and the simulation results meet the design requirements well.
    16  A Study on the Method of Anti-voltage Sag of High Power Pulse Instrumentation Radar
    WANG Lu LANG Dingchuan LI Naizhong LIU Yanqiang
    2015(10):65-68.
    [Abstract](2720) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    According to the protection shutdown problem of high power pulse instrumentation radar caused by alarm of servo, transmitter and forcing water cooling system due to alternation current (AC) power supply voltage sag, the simple description of pulse radar system composition and the corresponding power capacity is presented. A detailed analysis of feasibility to pnuer the servo, transmitter and water cooling system by AC power and uninterrupted power supply (UPS), simultaneously power are specially emphasized. The improvement suggestions of low voltage control circuit and the corresponding control and protection logic of programmable logic controller are put forward to improve the ability of radar system against voltage transient sag.
    17  Universal Design of Automated Test System for Radar
    DUAN Daoju ZHANG Yongzhen ZHANG Peng ZHU Chuanming
    2015(10):69-72.
    [Abstract](2657) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    In order to meet the general test requirements of the radar equipment for automatic test equipment, we developed the automatic test system based on PXI and VXI bus by using mixed bus technology. This system used the design method of the connector-a-dapter interface to design the test interface, and the software platform for automatic test system is developed based on the method of signal oriented system. This paper introduced the design method of the radar automatic test system, and mainly explained the design method of the general hardware platform and the test interface adapter, and the software of the automatic test system was described.The system has ample test resources, compact structure and high automation degree, and can be used to test many kinds of active radar equipments. The system conquered the shortcomings of low automation degree, low equipment reuse rate and high quality requirements for the maintenance in the course of radar equipment maintenance, so this system would have a certain military significance.
    18  Application of ATS Technology in Microwave Network Debugging
    HUO Liying YANG Limin CHEN Yan
    2015(10):73-76.
    [Abstract](2745) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    This paper introduces the actual application of ATS technology in the microwave network debugging, gives the hardware composition and software implementation. The microwave network complex form required by a large number of debugging work to make the indicators meet the requirements. The debugging personnel need to index the debugging and testing repeatedly replacing port. A kind of ATS technology is introduced to the microwave network debugging system. Based on GPIB bus, signal transmission center and the corresponding control software to realize the purpose of automation testing and auxiliary debugging. Introduced the system debugging of ATS technology of accuracy can be achieved: amplitude error is less than or equal to 0. 05 dB, the phase error is less than 1 degrees, the debugging efficiency is increased by 40% .
    19  Analysis and Optimization of Spreading Thermal Resistance for Solid-state T / R Module Cold Plate
    QIAN Jiyu WEI Tao
    2015(10):77-81.
    [Abstract](2838) [HTML](0) [PDF 0.00 Byte](0)
    Abstract:
    The spreading thermal resistance caused by the area difference between the electronic device and the cooling plate is significantly high when the heat flux density is higher than 100 W/ cm2 . In this paper, the thermal spreading resistance of the solid- state T/ R module cold plate was modeled and simulated with a simplified analytical method, and then the effect of heat transfer coefficient, thickness, radius, heat transfer coefficient of the cold plate was studied. The optimal combination of parameters, such as, the radius and the thickness was obtained, with which the spreading thermal resistance and the total heat transfer resistance was minimum. Finally, the present model was validated with a CFD simulation, with a reasonable match obtained, which proved the present work as a solid reference of relevant applications

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