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홍순목,황찬식,배건성 경북대학교 전자기술연구소 1982 電子技術硏究誌 Vol.3 No.1
A new simple type of digital transition tracking loop is proposed and investigated for synchronization of a binary nonreturn-to-zero(NRZ) sequence which doesn't have symbol rate frequency components in spectrum. The loop operation is analyzed theoretically and experimentally and simulated by computer program. Results of experiments and simulation show that the loop operates well as a data-derived symbol synchronizer having frequency tracking ability within ±0.07 f_o approximately and the range is extended using square wave as an input signal.
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홍순목,신해곤 한국센서학회 1993 센서학회지 Vol.2 No.1
In this paper the normalized innovations squared of a Kalman filter is used to detect a bias level in prediction errors due to target accelerations. The probability density function of the normalized innovation squared is obtained for a steady state Kalman filter, and it is used to calculate the detection probability of the bias level. A typical example is given to compute the detection probability and to plot the maneuver detector operating characteristic curves.
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위상배열 레이다를 위한 가변 표본화 빈도 추적 필터의 설계
홍순목 한국센서학회 1992 센서학회지 Vol.1 No.1
The phased array antenna has the ability to perform adaptive sampling by directing the radar beam without inertia in any direction. The adaptive sampling capability of the phased array antenna allows each sampling time interval to be varied for each target, depending on the acceleration of each target at any time. In this paper we design a three-dimensional adaptive tracking algorithm for the phased array radar system with a given set of measurement parameters. The tracking algorithm avoids taking unnecessarily frequent samples, while keeping the angular prediction error within a fraction of antenna beamwidth so that the probability of detection will not be degraded during a track update illuminations. In our algorithm, the target model and the sampling rate are selected depending on the target range and the target maneuver status which is determined by a maneuver detector. A detailed simulation is conducted to test the validity of our tracking algorithm for encounter geometries under various conditions of maneuver.
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위상배열 레이다를 위한 가변 표본화 빈도 추적 필터의 설계
홍순목,Hong, Sun-Mog 한국센서학회 1992 센서학회지 Vol.29 No.3
위상배열 안테나 레이다에서는 기계적 관성에 관계없이 레이다 빔의 신속한 조향이 가능하기 때문에 측정을 원하는 목표와 그 목표에 대한 측정시간, 측정표본속도를 선택적으로 취할 수 있게 된다. 이 논문에서는 주어진 측정 파라미터에 대해 이러한 위상배열 레이다 시스템을 위한 3차원 가변 포본화 빈도 추적 필터를 설계했다. 이 추적 필터는 추적목표의 탐지확률을 적정한 값 이상으로 유지하기 위해서 목표의 각도 예측오차를 안테나 빔 폭의 일정한 비율이내로 줄일 수 있어야 한다. 여기서 설계한 추적 필터는 이러한 요구를 만족하는 범위에서 표본화 빈도를 낮출 수 있도록 목표까지의 거리와 기동에 따라 표본화 빈도를 선택하게 된다. 이 추적 필터설계의 타당성은 여러가지 기동목표에 대한 수치실험을 통해 확인했다. The phased array antenna has the ability to perform adaptive sampling by directing the radar beam without inertia in any direction. The adaptive sampling capability of the phased array antenna allows each sampling time interval to be varied for each target, depending on the acceleration of each target at any time. In this paper we design a three-dimensional adaptive tracking algorithm for the phased array radar system with a given set of measurement parameters. The tracking algorithm avoids taking unnecessarily frequent samples, while keeping the angular prediction error within a fraction of antenna beamwidth so that the probability of detection will not be degraded during a track update illuminations. In our algorithm, the target model and the sampling rate are selected depending on the target range and the target maneuver status which is determined by a maneuver detector. A detailed simulation is conducted to test the validity of our tracking algorithm for encounter geometries under various conditions of maneuver.
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Quantification of Angular Prediction Accuracy for Phased Array Radar Tracking
홍순목,Hong, Sun-Mog The Institute of Electronics and Information Engin 2012 電子工學會論文誌-SC (System and control) Vol.37 No.3
위상배열레이더를 이용한 추적의 성능을 지수화하기 위해서 각도예측 오차공분산행렬의 함수를 이용한 정량화 방법에 대해 검토하였다. 특히, 이 오차공분산행렬의 함수로 최대고유값과 대각합을 이용하여 정량화하는 경우에 대해 안테나 빔조향 손실을 반영한 표적탐지확률을 기준으로 정량화의 일관성을 수치실험을 통해 검토하였다. 이를 통해 추적성능을 표적탐지확률로 기준하는 경우, 대각합이 최대고유값 보다 더 일관성을 갖는 정량화 함수임을 확인하였다. Scalar quantification of the angular prediction error covariance matrix is considered for characterizing tracking performances in phased array radar tracking. Specifically, the maximum eigenvalue and the trace of the covariance matrix are examined in terms of consistency in parameterizing the probability of detection, taking antenna beam-pointing losses into account, and it is shown numerically that the latter is more consistent.
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홍순목,여준혁 경북대학교 전자기술연구소 1997 電子技術硏究誌 Vol.18 No.1
In this paper we propose an efficient algorithm for computing the growth function between moving polytopes. The algorithm can track contact features between moving polytopes which are either grown or contracted so that they just touch. The contact features are determined by checking the maintenance of contact coherence or by tracking the contact transition. The contact features are exploited effectively in computing the growth function of moving polytopes at grid points along a given path. Numerical results show that the algorithm is more effective as either the total number of faces or the number of grid-points increases.
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洪淳穆 경북대학교 공과대학 1980 工大硏究誌 Vol.9 No.-
The maximum Euclidean norm of the complementary signal response at samling times of the networks of which element values are within tolerance and are interconnected properly, is chosen as the criterion of GO-NO-GO decision. And using SPICE program, the fault detection resolution to single component parameter variations is determined about a 2-pole Butterworth filter and a 4-pole/2-zero Butterworth filter and it is shown that the maximum Euclidean norm of the output can be used as a simple criterion for fault detection.
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