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An Unambiguity and Anti-Range Eclipse Method for PD Radar Using Biphase Coded Signals

Computer Modeling in Engineering & Sciences 2023年第2期134卷 1337-1351页

作者： Jihong Yan Weihan Ni Jianshu Zhai Haiyang Dong Yangtze Delta Region Institute(Quzhou) University of Electronic Science and Technology of ChinaQuzhou324000China School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu611731China

Target detection is an important research content in the radar *** present,efforts are being made to optimize the precision of detection *** this paper,we use the high pulse repetition frequency(HPRF)transmission method and orthogonal biphase coded signals in each pulse to avoid velocity ambiguity and range ambiguity of radar *** addition,We also apply Walsh matrix and genetic algorithm(GA)to generate satisfying orthogonal biphase coded signals with low auto-correlation sidelobe peak and cross-correlation peak,which make the results more *** a radar receiver,data rearrangement of echo signals is performed,and then pulse compression and moving target detection(MTD)are utilized to get the final velocity and range information of a target without velocity ambiguity and range ***,a small transmitting pulse time width is adopted to reduce the working blind area,and two different high pulse repetition frequencies(HPRFs)are adopted to solve the problem of range *** results finally prove the effectiveness and feasibility of the proposed method.

关键词： Biphase coded velocity ambiguity range ambiguity genetic algorithm range eclipse

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velocity measurement technique for high-speed targets based on digital fine spectral line tracking

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Journal of Systems Engineering and Electronics 2006年第1期17卷 6-12页

作者： Wen Shuliang Yuan Qi Dept. of Electronic Engineering Beijing Inst. of Technology Beijing 100081 P. R. China No.23 Inst. of the Second Research Academy China Aercspace Science and Industry Corporation Beijing 100854 P. R. Caina

Target vdocity and acceleration are two of the most important features for identification of warheads and decoys in ballistic missile defense phased array radar systems. velocity compensation is also the necessary step for one-dimensional range profile imaging. According to the high-vdocity characteristics of ballistic objects and the low data rate of phased array radars with multiple target tracking, a fine spectral line digital velocity tracking frame is presented and a new method is developed to extract velocity error and resolve the velocity ambiguity in the measurement loop. Simulation results demonstrate the effectiveness of the proposed technique.

关键词： radar tracking radial velocity measurement velocity error extraction velocity ambiguity

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QUALITY CONTROL OF SINGLE DOPPLER RADAR DATA AND RETRIEVAL OF HORIZONTAL WIND FOR A LANDING TYPHOON

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Journal of Tropical Meteorology 2008年第2期14卷 165-167页

作者：刘淑媛闫丽凤孙健 Air Force Meteorological Center Yantai Weather Bureau Chinese Academy of Meteorological Sciences/State key Laboratory of Severe Weather

The removal of noise and velocity ambiguity and retrieval and verification of horizontal wind field is a prerequisite to make the best and fullest use of Doppler radar measurements. This approach was applied to the Doppler radar data collected during August 2005 for a landing typhoon Matsa (0509) in Yantai, Shangdong Province, and the verified result shows that the quality control for this dataset was successful. The horizontal wind field was retrieved and then verified by studying the characteristics of the radar radial velocity and large-scale wind field and the vertical cross section of the radial velocity determined with the typhoon center as the circle center and comparing it with satellite imagery. The results show that the meso- and small-scale systems in Matsa and its horizontal and vertical structure could be clearly retrieved using the dataset collected by single Doppler radar, and a shear or a convergence was corresponding with a band of severe storm around Matsa. At the same time, the retrieved wind field from single Doppler radar is proved to be a reliable and high-resolution dataset in analyzing the inner meso-scale structure of Matsa. It is also proved that the method for removing the velocity ambiguity could be an effective approach for preliminary quality control of the Doppler radar data, and the VAP method could also be a reasonable solution for the analysis of mesoscale wind field.

关键词： Doppler radar horizontal wind retrieval velocity ambiguity landing typhoon

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