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Multiple-model GLMB filter based on track-before-detect for tracking multiple maneuvering targets

Journal of Systems Engineering and Electronics 2024年第5期35卷 1109-1121页

作者： cao chenghu ZHAO Yongbo School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China National Laboratory of Radar Signal Processing Xidian UniversityXi’an 710071China

A generalized labeled multi-Bernoulli(GLMB)filter with motion mode label based on the track-before-detect(TBD)strategy for maneuvering targets in sea clutter with heavy tail,in which the transitions of the mode of target motions are modeled by using jump Markovian system(JMS),is presented in this *** close-form solution is derived for sequential Monte Carlo implementation of the GLMB filter based on the TBD *** update,we derive a tractable GLMB density,which preserves the cardinality distribution and first-order moment of the labeled multi-target distribution of interest as well as minimizes the Kullback-Leibler divergence(KLD),to enable the next recursive *** relevant simulation results prove that the proposed multiple-model GLMB-TBD(MM-GLMB-TBD)algorithm based on K-distributed clutter model can improve the detecting and tracking performance in both estimation error and robustness compared with state-of-the-art algorithms for sea clutter ***,the simulations show that the proposed MM-GLMB-TBD algorithm can accurately output the multitarget trajectories with considerably less computational complexity compared with the adapted dynamic programming based TBD(DP-TBD)***,the simulation results also indicate that the proposed MM-GLMB-TBD filter slightly outperforms the JMS particle filter based TBD(JMSMeMBer-TBD)filter in estimation error with the basically same computational ***,the impact of the mismatches on the clutter model and clutter parameter is investigated for the performance of the MM-GLMB-TBD filter.

关键词： generalized labeled multi-Bernoulli(GLMB) trackbefore-detect(TBD) jump Markovian system(JMS) K-distribution Kullback-Leibler divergence(KLD)

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STAP method based on atomic norm minimization with array amplitude-phase error calibration

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Journal of Systems Engineering and Electronics 2021年第1期32卷 21-30页

作者： PANG Xiaojiao ZHAO Yongbo cao chenghu XU Baoqing HU Yili National Lab of Radar Signal Processing Department of Electrical EngineeringXidian UniversityXi’an 710071China

In this paper,a space-time adaptive processing(STAP)method is proposed for the airborne radar with the array amplitude-phase error considered,which is based on atomic norm minimization(ANM).In the conventional ANM-based STAP method,the influence of the array amplitude-phase error is not considered and restrained,which inevitably causes performance *** solve this problem,the array amplitude-phase error is firstly ***,by pre-estimating the array amplitude-phase error information,a modified ANM model is built,in which the array amplitude-phase error factor is separated from the clutter response and the clutter covariance matrix(CCM)to improve the estimation accuracy of the *** prove that the atomic norm theory is applicable in the presence of the array amplitude-phase error,the clutter sparsity is analyzed in this ***,simulation results demonstrate that the proposed method is superior to the state-of-the-art STAP ***,the measured data is used to verify the effectiveness of the proposed method.

关键词： atomic norm minimization(ANM) space-time adaptive processing(STAP) airborne radar array amplitude-phase error

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A method based on Chinese remainder theorem with all phase DFT for DOA estimation in sparse array

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Journal of Systems Engineering and Electronics 2020年第1期31卷 1-11页

作者： cao chenghu ZHAO Yongbo PANG Xiaojiao XU Baoqing CHEN Sheng National Laboratory of Radar Signal Processing Xidian UniversityXi’an 710071China Information Sensing and Understanding Xidian UniversityXi’an 710071China

This paper takes further insight into the sparse geometry which offers a larger array aperture than uniform linear array(ULA)with the same number of physical *** efficient method based on closed-form robust Chinese remainder theorem(CFRCRT)is presented to estimate the direction of arrival(DOA)from their wrapped phase with permissible *** proposed algorithm has significantly less computational complexity than the searching method while maintaining similar estimation ***,we combine all phase discrete Fourier transfer(APDFT)and the CFRCRT algorithm to achieve a considerably high DOA estimation *** the theoretical analysis and simulation results demonstrate that the proposed algorithm has a higher estimation precision as well as lower computation complexity.

关键词： direction of arrival(DOA) wrapped phase closedform robust Chinese remainder theorem(CFRCRT) all phase discrete Fourier transfer(APDFT)

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Target height and multipath attenuation joint estimation with complex scenarios for very high frequency radar

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Frontiers of Information Technology & Electronic Engineering 2022年第6期23卷 937-949页

作者： Sheng CHEN Yongbo ZHAO Yili HU chenghu cao Xiaojiao PANG National Laboratory ofRadar Signal Processing Xidian UniversityXi'an710071China

Low-angle estimation for very high frequency(VHF)radar is a difficult problem due to the multipath effect in the radar field,especially in complex scenarios where the reflection condition is *** deal with this problem,we propose an algorithm of target height and multipath attenuation joint *** amplitude of the surface reflection coefficient is estimated by the characteristic of the data itself,and it is assumed that there is no reflected signal when the amplitude is very *** phase of the surface reflection coefficient and the phase difference between the direct and reflected signals are searched as the same part,and this represents the multipath phase *** Cramer-Rao bound of the proposed algorithm is also ***,computer simulations and real data processing results show that the proposed algorithm has good estimation performance under complex scenarios and works well with only one snapshot.

关键词： Low-angle estimation Very high frequency(VHF)radar Complex scenarios Multipath effect Height estimation

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Range estimation based on symmetry polynomial aided Chinese remainder theorem for multiple targets in a pulse Doppler radar

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Frontiers of Information Technology & Electronic Engineering 2022年第2期23卷 304-316页

作者： chenghu cao Yongbo ZHAO National Lab of Radar Signal Processing Xidian UniversityXi’an 710071China Information Sensing and Understanding Xidian UniversityXi'an 710071China

To avoid Doppler ambiguity,pulse Doppler radar may operate on a high pulse repetition frequency(PRF).The use of a high PRF can,however,lead to range ambiguity in many *** present,the major efficient solution to solve range ambiguity is based on a waveform design *** adds complexity to a radar ***,the traditional multiple-PRF-based scheme is difficult to be applied in multiple targets because of unknown correspondence between the target range and measured range,especially using the Chinese remainder theorem(CRT)*** make a study of the CRT algorithm for multiple targets when the residue set contains noise *** this paper,we present a symmetry polynomial aided CRT algorithm to effectively achieve range estimation of multiple targets when the measured ranges are overlapped with noise error.A closed-form and robust CRT algorithm for single target and the Aitken acceleration algorithm for finding roots of a polynomial equation are used to decrease the computational complexity of the proposed algorithm.

关键词： Range ambiguity Erroneous range Multiple targets Symmetry polynomial aided Chinese remainder theorem

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Low-angle estimation using frequency-agile refined maximum likelihood algorithm based on optimal fusion

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Journal of Systems Engineering and Electronics 2021年第3期32卷 538-544页

作者： CHEN Sheng ZHAO Yongbo PANG Xiaojiao HU Yili cao chenghu National Laboratory of Radar Signal Processing Xidian UniversityXi’an 710071China

Low elevation estimation,which has attracted wide attention due to the presence of specular multipath,is essential for tracking *** agility not only has the advantage of strong anti-interference ability,but also can enhance the performance of tracking radars.A frequency-agile refined maximum likelihood(RML)algorithm based on optimal fusion is *** algorithm constructs an optimization problem,which minimizes the mean square error(MSE)of angle ***,the optimal weight at different frequency points is obtained for fusing the angle *** theoretical analysis and simulation,the frequency-agile RML algorithm based on optimal fusion can improve the accuracy of angle estimation effectively.

关键词： frequency-agile maximum likelihood multipath signal low-angle estimation

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基于封闭式鲁棒中国余数定理的两目标距离估计算法

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信号处理 2022年第7期38卷 1434-1441页

作者：曹成虎赵永波西安邮电大学电子工程学院陕西西安710121 西安电子科技大学雷达信号处理重点实验室陕西西安710071

工作在高脉冲重复频率(Pulsed Repetition Frequency,PRF)模式下的脉冲多普勒(Pulse Doppler,PD)雷达具有复杂气象杂波和强地杂波背景下检测运动目标的能力,但是远距离目标检测存在距离模糊问题。传统的解距离模糊算法大都采用参差重频... 详细信息

工作在高脉冲重复频率(Pulsed Repetition Frequency,PRF)模式下的脉冲多普勒(Pulse Doppler,PD)雷达具有复杂气象杂波和强地杂波背景下检测运动目标的能力,但是远距离目标检测存在距离模糊问题。传统的解距离模糊算法大都采用参差重频模式下的中国余数定理(Chinese Remainder Theorem,CRT),但是由于多目标的视在距离与目标的对应关系事先未知,对基于中国余数定理算法进行距离估计带来困难。该文提出一种基于封闭式鲁棒中国余数定理的两个目标距离估计的方法,该方法无需考虑视在距离与目标的对应关系,在视在距离存在误差的情况下,利用封闭式的简单解析方法快速准确地重构出两个目标的真实距离。理论分析和仿真结果表明,该文所提方法可以高效地实现高PRF雷达两个远距离目标的距离估计。

关键词：高脉冲重复频率距离模糊封闭式鲁棒中国余数定理两个目标

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电流激励型多通道经络阻抗检测仪的设计与实现

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中国医疗器械杂志 2015年第2期39卷 98-101页

作者：曹成虎陈新福州大学物理与信息工程学院福州市350108

该文介绍一种用于经络三维可视化研究的多通道阻抗检测仪。根据经络的低阻抗电学特性,采用电流激励方式的四电极测量方法,设计和研制多通道检测仪的各个模块,包括电源模块、正弦信号发生器、压控电流源、隔离放大电路、滤波电路和有效... 详细信息

该文介绍一种用于经络三维可视化研究的多通道阻抗检测仪。根据经络的低阻抗电学特性,采用电流激励方式的四电极测量方法,设计和研制多通道检测仪的各个模块,包括电源模块、正弦信号发生器、压控电流源、隔离放大电路、滤波电路和有效值检测模块等。

关键词：经络阻抗检测经络定位

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基于插值拟合的抛面共形阵盲极化DOA估计

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系统工程与电子技术 2021年第8期43卷 2037-2044页

作者：胡毅立赵永波陈胜曹成虎西安电子科技大学雷达信号处理国家重点实验室陕西西安710071

共形阵的载体曲率形式复杂,导致抛面共形阵的方向图指向不同,而且不同天线单元的极化特性迥异。常见的圆柱阵、圆锥阵在同一母线上的极化分量是相同的,但是抛面共形阵的载体曲率是变化的,因此抛面共形阵的参数估计问题需要考虑极化分量... 详细信息

共形阵的载体曲率形式复杂,导致抛面共形阵的方向图指向不同,而且不同天线单元的极化特性迥异。常见的圆柱阵、圆锥阵在同一母线上的极化分量是相同的,但是抛面共形阵的载体曲率是变化的,因此抛面共形阵的参数估计问题需要考虑极化分量的影响,导致无法直接用同一母线上阵元回波数据结合免搜索算法获得目标二维波达方向(direction of arrival,DOA)估计。首先,提出一种通过插值拟合思想将抛面共形阵带有极化参数的阵列流形拟合成无极化参数的阵列流形,然后合理选择子阵对,再利用旋转不变技术估计信号参数(estimation of signal parameters via rotational invariance techniques,ESPRIT)方法实现盲极化的DOA估计,同时给出了经过插值拟合后的克拉美罗边界(Cramer-Rao bound,CRB)。最后仿真验证了方法的有效性。

关键词：抛面共形阵插值拟合盲极化二维波达方向估计

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基于协方差拟合准则的降维空时自适应处理方法

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系统工程与电子技术 2022年第1期44卷 86-93页

作者：庞晓娇赵永波曹成虎胡毅立陈胜西安电子科技大学雷达信号处理国家重点实验室陕西西安710071

最优空时自适应处理方法由于计算量大且需要大量的训练样本来估计杂波协方差矩阵而无法满足实际应用,针对此问题,本文提出一种基于协方差拟合准则的降维空时自适应处理方法。该方法首先对每个阵元收到的回波信号进行时域滤波,然后通过... 详细信息

最优空时自适应处理方法由于计算量大且需要大量的训练样本来估计杂波协方差矩阵而无法满足实际应用,针对此问题,本文提出一种基于协方差拟合准则的降维空时自适应处理方法。该方法首先对每个阵元收到的回波信号进行时域滤波,然后通过协方差拟合准则构造了在高斯信源下与最大似然估计器渐近等价的优化问题,同时我们将协方差拟合优化问题转换为半定规划问题,并利用CVX工具包求解优化问题,进而估计杂波加噪声协方差矩阵。仿真实验表明,相比于现存在的多普勒滤波后空时联合处理方法,该方法所需的训练样本数更少,且杂波抑制性能更好。

关键词：协方差拟合准则空时自适应处理杂波抑制降维

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