Bistatic/multistatic radar has great potential advantages over its monostatic counterpart. However, the separation of a transmitter and a receiver leads to difficulties in locating the target position accurately and g...Bistatic/multistatic radar has great potential advantages over its monostatic counterpart. However, the separation of a transmitter and a receiver leads to difficulties in locating the target position accurately and guaranteeing space-timefrequency synchronization of the transmitter and the receiver.The error model of space-time-frequency synchronization in a motion platform of bistatic/multistatic radar is studied. The relationship between the space synchronization error and the transmitter platform position, receiver platform position, moving state, and beam pointing error, is analyzed. The effect of space synchronization error on target echo power is studied. The target scattering characteristics are restructured by many separate scattering centers of the target in high frequency regions. Based on the scattering centers model of the radar target, this radar target echo model and the simulation method are discussed. The algorithm of bistatic/multistatic radar target echo accurately reflects the scattering characteristics of the radar target, pulse modulation speciality of radar transmitting signals, and spacetime-frequency synchronization error characteristics between the transmitter station and the receiver station. The simulation of bistatic radar is completed in computer, and the results of the simulation validate the feasibility of the method.展开更多
传统高频脉振电压注入法采用基于带通滤波器与低通滤波器结合的策略,实现位置误差信号提取。但该策略的不足在于无法同时兼顾位置观测闭环的滤波精度与动态性能。为此,提出一种基于双频陷波器(dual frequency notch filter,DFNF)级联低...传统高频脉振电压注入法采用基于带通滤波器与低通滤波器结合的策略,实现位置误差信号提取。但该策略的不足在于无法同时兼顾位置观测闭环的滤波精度与动态性能。为此,提出一种基于双频陷波器(dual frequency notch filter,DFNF)级联低通滤波器的改进型位置误差信号提取策略。该策略通过提高环路增益实现带宽扩展,再利用DFNF加强对二次注入谐波的抑制能力,使位置观测环同时具备高带宽与强滤波特性。首先,对位置观测等效闭环进行建模,并利用闭环传递函数幅频特性分析传统位置误差信号提取策略存在的问题;然后,对改进型位置误差信号提取策略的原理进行介绍,并对比2种位置误差信号提取策略的性能;最后,基于RT-LAB实验平台,对2种位置误差信号提取策略的位置辨识效果进行对比验证。展开更多
基金supported by the National Natural Science Foundation of China(61271327)
文摘Bistatic/multistatic radar has great potential advantages over its monostatic counterpart. However, the separation of a transmitter and a receiver leads to difficulties in locating the target position accurately and guaranteeing space-timefrequency synchronization of the transmitter and the receiver.The error model of space-time-frequency synchronization in a motion platform of bistatic/multistatic radar is studied. The relationship between the space synchronization error and the transmitter platform position, receiver platform position, moving state, and beam pointing error, is analyzed. The effect of space synchronization error on target echo power is studied. The target scattering characteristics are restructured by many separate scattering centers of the target in high frequency regions. Based on the scattering centers model of the radar target, this radar target echo model and the simulation method are discussed. The algorithm of bistatic/multistatic radar target echo accurately reflects the scattering characteristics of the radar target, pulse modulation speciality of radar transmitting signals, and spacetime-frequency synchronization error characteristics between the transmitter station and the receiver station. The simulation of bistatic radar is completed in computer, and the results of the simulation validate the feasibility of the method.
文摘传统高频脉振电压注入法采用基于带通滤波器与低通滤波器结合的策略,实现位置误差信号提取。但该策略的不足在于无法同时兼顾位置观测闭环的滤波精度与动态性能。为此,提出一种基于双频陷波器(dual frequency notch filter,DFNF)级联低通滤波器的改进型位置误差信号提取策略。该策略通过提高环路增益实现带宽扩展,再利用DFNF加强对二次注入谐波的抑制能力,使位置观测环同时具备高带宽与强滤波特性。首先,对位置观测等效闭环进行建模,并利用闭环传递函数幅频特性分析传统位置误差信号提取策略存在的问题;然后,对改进型位置误差信号提取策略的原理进行介绍,并对比2种位置误差信号提取策略的性能;最后,基于RT-LAB实验平台,对2种位置误差信号提取策略的位置辨识效果进行对比验证。
