In this paper,we present a novel unimodular sequence design algorithm based on the coordinate descent(CD)algorithm,aimed at countering electronic surveillance(ES)systems based on cyclostationary analysis.Our algorithm...In this paper,we present a novel unimodular sequence design algorithm based on the coordinate descent(CD)algorithm,aimed at countering electronic surveillance(ES)systems based on cyclostationary analysis.Our algorithm not only provides resistance against cyclostationary analysis(CSA)but also maintains low integrated sidelobe(ISL)characteristics.Initially,we derive the expression of the cyclostationary feature(CSF)detector and simplify it into an iterative quadratic form.Additionally,we derive a quadratic form to ensure the similarity of the autocorrelation sidelobes.To balance the minimization of the detection probability and the ISL values,we introduce a Pareto scalar that transforms the multiobjective optimization problem into a convex combination of objective functions.This approach allows us to find an optimal trade-off between the two objectives.Finally,we propose a monotonic algorithm based on the CD algorithm to counter CSA analysis.This algorithm efficiently solves the optimization problem mentioned earlier.Numerical experiments are conducted to validate the correctness and effectiveness of our proposed algorithm.展开更多
为实现检测和精确提取LPI(Low probability of intercepting)雷达中脉冲压缩(PC)雷达信号的参数,文章提出基于数字信道化的接收机,采用频域子带分数阶傅里叶变换聚焦、滤波处理方法,以增强雷达信号检测与去噪能力,实现对雷达弱信号的检...为实现检测和精确提取LPI(Low probability of intercepting)雷达中脉冲压缩(PC)雷达信号的参数,文章提出基于数字信道化的接收机,采用频域子带分数阶傅里叶变换聚焦、滤波处理方法,以增强雷达信号检测与去噪能力,实现对雷达弱信号的检测和参数提取。文中给出了数字信道化接收机结构和分数阶傅里叶滤波步骤,仿真及性能分析。展开更多
基金support of the National Natural Science Foundation of China under grant numbers 62101570 and 61901494financial support has played a crucial role in the successful completion of this research.
文摘In this paper,we present a novel unimodular sequence design algorithm based on the coordinate descent(CD)algorithm,aimed at countering electronic surveillance(ES)systems based on cyclostationary analysis.Our algorithm not only provides resistance against cyclostationary analysis(CSA)but also maintains low integrated sidelobe(ISL)characteristics.Initially,we derive the expression of the cyclostationary feature(CSF)detector and simplify it into an iterative quadratic form.Additionally,we derive a quadratic form to ensure the similarity of the autocorrelation sidelobes.To balance the minimization of the detection probability and the ISL values,we introduce a Pareto scalar that transforms the multiobjective optimization problem into a convex combination of objective functions.This approach allows us to find an optimal trade-off between the two objectives.Finally,we propose a monotonic algorithm based on the CD algorithm to counter CSA analysis.This algorithm efficiently solves the optimization problem mentioned earlier.Numerical experiments are conducted to validate the correctness and effectiveness of our proposed algorithm.
文摘为实现检测和精确提取LPI(Low probability of intercepting)雷达中脉冲压缩(PC)雷达信号的参数,文章提出基于数字信道化的接收机,采用频域子带分数阶傅里叶变换聚焦、滤波处理方法,以增强雷达信号检测与去噪能力,实现对雷达弱信号的检测和参数提取。文中给出了数字信道化接收机结构和分数阶傅里叶滤波步骤,仿真及性能分析。
