• Title/Summary/Keyword: Phase-Comparison Monopulse

Search Result 8, Processing Time 0.03 seconds

A Performance Analysis of Phase Comparison Monopulse Algorithm for Antenna Spacing and Antenna Array (안테나 간격 및 배열에 따른 위상 비교 모노펄스 알고리즘의 성능 분석)

  • Sim, Heon-Kyo;Jung, Min-A;Kim, Seong-Cheol
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.40 no.7
    • /
    • pp.1413-1419
    • /
    • 2015
  • Monopulse RADAR is the radar which detects the range of the target using a single transmitted signal. In this paper, using 9.41GHz X-band radar, the research for the phase comparison monopulse algorithm used in the marine environment is conducted. In addition, by applying the phase comparison monopulse algorithm, we calculate the RMSE for the various antenna spacings and the positions of the target. Based on that result, we compare the performance of the phase comparison monopulse algorithm in the uniform linear array with that in the non-uniform linear array. Finally, the differences in performance among the MUSIC algorithm, Bartlett method and the proposed phase comparison monopulse algorithm are analyzed.

Angle Estimation of Two Targets in the Same Antenna Beam Using Adaptive Phase-Comparison Monopulse Technique (안테나 빔 내의 두 표적에 대한 각도 추정을 위한 적응형 위상 비교 모노펄스 기법)

  • Lee, Seong-Hyeon;Lee, Seung-Jae;Choi, Gak-Gyu;Yi, Jae-Woong;Kim, Kyung-Tae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.26 no.7
    • /
    • pp.666-674
    • /
    • 2015
  • In this paper, we introduce an adaptive phase-comparison monopulse technique for angle estimation of two targets in the same antenna beam. The proposed method determines a more suitable technique(between conventional phase comparison monopulse technique and Zheng's method) based on interference between two targets in Fourier domain. Consequently, regardless of the interference, angles of each individual target can be accurately estimated by means of the proposed method. In simulations, we assumed that two point targets with same velocity are located in the same antenna beam, and the accuracy improvement of the proposed method is verified by using several simulations.

Accuracy Improvement of the Estimated Angle Using Phase Averaging in Phase-Comparison Monopulse Algorithm (위상 비교 모노 펄스 알고리즘에서 위상평균법을 이용한 추정 각도 정확도 향상)

  • Cho, Byung-Lae;Lee, Jung-Soo;Lee, Jong-Min;Sun, Sun-Gu
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.23 no.10
    • /
    • pp.1212-1215
    • /
    • 2012
  • This study describes the accuracy improvement of the estimated angle using phase averaging in phase-comparison monopulse algorithm. In addition, to compensate the time-delay due to the phase averaging, we propose the time-delay compensation algorithm which uses the derivative of the estimated angle. These derivative is calculated by the curve fitting method. Using the real radar interferometer, we have verified that the phase averaging and time-delay compensation algorithms are effective in real-time signal processing application.

Performance Comparison to Solve Angle Ambiguity Needed to Angle of Arrival Estimation in 2D Radar Interferometer (2차원 레이다 간섭계에서 각도 추정 알고리즘의 각도 모호성 해소 성능 비교)

  • Cho, Byung-Lae;Lee, Jung-Soo;Lee, Jong-Min;Sun, Sun-Gu
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.23 no.3
    • /
    • pp.410-413
    • /
    • 2012
  • This study describes the performance comparison to solve angle ambiguity needed to angle of arrival estimation in 2D radiometer. There are three algorithms to solve its ambiguity such as phase-comparison monopulse method, digital beam-forming method and least square error of the phase difference in 2D radar interferometer. To estimate two direction angles, phase-comparison monopulse method is sequentially applied to azimuth and elevation direction. To analyze the performance of these methods, probability of solving angle ambiguity and execution time have been chosen as performance indexes. Through the Monte Carlo simulation, we have verified that phase-comparison monopulse method is most effective in real-time signal processing application.

Genetic Algorithm Based Linear Region Extension for Multivariable Monopulse Tracking Systems (다변수 모노펄스 추적 시스템에서 유전 알고리즘 기반 선형구간 확장)

  • Jung, Jinwoo;Kim, Jaesin;Ryu, Young-Jae
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.20 no.2
    • /
    • pp.272-278
    • /
    • 2017
  • In this paper, we consider a single-channel amplitude comparison monopulse system(SCACMS). The monopulse ratio curve(MR-C) of the SCACMS can be controlled by an amplitude difference between sum and different signal, a phase difference and the coefficient of the signal processor. We first propose the SCACMS with multiple variables, and then apply a genetic algorithm to optimize the multiple variables in terms of minimizing a root mean square error. The simulation results show that when three variables of the SCACMS are jointly optimized, the linear region of the MR-C can be extended approximately 187 % compared to that of two variables.

Two Unresolved Target Angle Estimation in Phase Comparison Monopulse Radar (위상비교모노펄스를 이용한 근접한 두 표적 분리에 관한 연구)

  • Lee, Seung-Phil;Cho, Byung-Lae;Kim, Young-Soo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.27 no.6
    • /
    • pp.539-544
    • /
    • 2016
  • This paper improves Sherman's two-pulse method for angle estimation of two unresolved targets in phase comparison monopulse radar. The proposed method provides the angle information with only a single-pulse measurement instead of two pulses. The proposed method can estimate a single-target angle by single-target indicator, in contrast with previous techniques. The accuracy of angle estimation for proposed method is demonstrated by simulations.

Design and Implementation of Multifunction 2-Channel Receiver for 3 Dimensional Phased Array Radar (3차원 위상배열 레이다용 다기능 2채널 수신기 설계 및 제작)

  • 강승민;양진모;송재원
    • Journal of the Korean Institute of Telematics and Electronics D
    • /
    • v.35D no.9
    • /
    • pp.1-12
    • /
    • 1998
  • We have implemented receiver for a 3 Dimensional Phased-Array Radar detecting the azimuth angle, the altitude, the range of a target on real time. This system consists of high frequency module, which protects receiver and controls sensitivity, intermediate frequency module, monopulse detector, IQ phase detector, AGC controller. A two-channel receiver with same function is implemented for increasing accuracy of target altitude data by amplitude comparison monopulse method. The TSS sensitivity of the receiver is -98dBm. The bandwidth of the receiver is 500 MHz. We can control the system gain manually by 100 dB when be AGC off. The gain and phase unbalance of two channels is 5 dB and 30 degree, respectively. The image rejection rate of the IQ detector is 30 dB. We used duroid substrate and package- type device.

  • PDF

Dual-band Monopulse Receiver for Tracking Radar (추적 레이다용 Dual-band 모노펄스 수신기)

  • Yang Seong-Uk;Park Dong-Min;Na Young-Jin
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.17 no.8 s.111
    • /
    • pp.767-772
    • /
    • 2006
  • The receiver of this paper is Dual-band monopulse type for prototype of tracking radar. Localization of radar technology is an issue of SamsungThales and go into development. Dual-band radar in comparison with Single-band radar requires higher cost and power consumption but there are many advantages of dealing with jamming, detection range, image signal rejection, cloud-rain influence, clutter, resolution. The receiver is comprised of X-band RF head module, Ka-band RF head module and common IF module. Each signal of X-band and Ka-band is selected by the switch in If module. Phase shifter in IF module of local stage controls the phase of sum, azimuth, elevation channel. In the test result, gain is $40{\pm}3 dB$, isolation of transmitter/receiver is 39 dBc, dynamic range is 110 dB and noise figure of each channel is 4.5dB and 6.9dB.