基于混合阵的自适应单脉冲测向方法
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Adaptive single-pulse direction finding method based on hybrid array
CHEN Wangjie1²， ZHU Weiqiang²，FAN Zhenhong1，WANG Tianyu²，LU Fanghui² （1.Nanjing University of Science and Technology，Nanjing 2lOO94， Jiangsu， China; 2.Nanjing Electronic Equipment Research Institute，Nanjing 2lOoOO， Jiangsu， China）
Abstract： An adaptive monopulse direction finding（DF） technology based on FPGA is presented，integrating the strengths of circular and orthogonal linear antenna arrays.The technology explores the principles of direction finding using hybrid array interferometers，adaptive phase diference measurement，and adaptive ambiguity resolution search mechanisms. By incorporating a frequency-adaptive ambiguity resolution search strategy，the method dynamically adjusts the number of searches based on signal frequency.It not only optimizes search eficiency but also enhances computational resource utilization. Additionally，an adaptive phase diffrence measurement technique， leveraging signal pulse width characteristics，significantly improves measurement accuracy. The technology employs dynamic resource allocation via FPGA，which flexibly adjusts resources according to real-time task requirements to ensure effcient operation. Simulation results demonstrate that within a 45∘ field of view，the technique achieves a 100% correct ambiguity resolution probability with an angular measurement accuracy better than 0.006∘ . Within a 65∘ field of view，the angular accuracy remains better than 0.012∘ .Compared to traditional methods，this technology significantly enhances direction-finding accuracy and ambiguity resolution probability while exhibiting superior anti-interference capabilities. These features make it highly suitable for high-precision direction-finding tasks in complex electromagnetic environments，offering broad application potential.
Key words： self-adaptation； single-pulse direction finding； position error； complex electromagneticenvironment
0 引言
在现代军事和民用领域，测向技术的应用日益广泛，尤其是在雷达探测、卫星导航和室内定位等关键任务中。（剩余5973字）
