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Performance Analysis of Single Channel Interferometer using circular array antenna in FH environment
JongMook Won,CheolSoo Lee,JeungMin Joo,JunHo Song,YoungJin Ryoo,KwangIl Lee,JeongKi Pack 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
In this paper, we perform the one channel Interferometer technique using circular array antenna in practical Frequency Hopping environment. For the one channel Interferometer technique, switching process and phase estimation algorithm and Correlation Vector Direction Finding (CVDF) is used. And we simulate the Direction Finding (DF) Accuracy by the error of switching and phase estimation in case Frequency Hopping signal exist. Also, the simulations include the DF error by the modulation of the interested narrow band signal.
김상원(Sangwon Kim),김정훈(Junghoon Kim),주증민(Jeungmin Joo),이동근(Donggeun Lee),조성진(Seongjin Jo) 한국전자파학회 2021 한국전자파학회논문지 Vol.32 No.9
본 논문에서는 넓은 주파수 범위에 매우 짧은 시간 존재하는 신호에 대해 낮은 샘플링 속도의 ADC를 이용하여 주파수를 측정하는 방식을 제안하였다. 다중 sub-Nyquist 샘플링 채널과 주파수 추정부(estimator)를 사용하는 주파수 측정 구조를 이용해 입력 주파수에 대해 각 채널에서 발생가능한 주파수 측정 모호성 패턴을 설계 시 분석하고, 각 채널에서 측정된 주파수 모호성이 포함된 결과를 처리하여 입력신호의 주파수를 추정한다. 이를 통해 신호 샘플링 속도 대비 수십 배 넓은 주파수 범위의 신호 주파수를 모호성 없이 측정할 수 있으며, 일반적인 DFD에 비해 더 좋은 주파수 측정성능을 잡음환경 시뮬레이션을 통해 보여주었다. This paper proposes an alternative method for measuring the frequency of a short-time signal in a wideband frequency range. A frequency measuring architecture comprising multiple sub-Nyquist sampling channels and a frequency estimator is proposed. The simulation results show that the proposed method has better frequency accuracy, though it uses lower sampling rates than typical DFDs for wideband input frequency range.
통신 신호 방향 탐지를 위한 광대역 다중 채널 수신기 개발
장재원,안준일,주증민,이동원,Chang, Jaewon,Ahn, Junil,Joo, Jeungmin,Lee, Dongweon 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.5
In wireless environments, wideband receivers are used in a communication intelligent system to detect unknown signals and obtain azimuth information. To design a wideband receiver that performs multiple signal detection and direction finding simultaneously, it is necessary to consider a reception structure composed of multiple channels. In this paper, we propose a wideband multi-channel receiver for direction finding of unknown wideband communication signals including frequency hopping signals. A signal processing method for detecting received signals and estimating azimuth information is presented, and components of the manufactured wideband receiver are described. In addition, test results of the signal detection performance by mounting the proposed wideband multi-channel receiver on the flight system are included.