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公开(公告)号:US20120098697A1
公开(公告)日:2012-04-26
申请号:US12911817
申请日:2010-10-26
申请人: Eung Gi Paek , Joon Y. Choe
发明人: Eung Gi Paek , Joon Y. Choe
IPC分类号: G01S7/40
CPC分类号: G01S13/003 , G01S13/0218 , G01S13/103
摘要: A Time Transfer Time Reverse Mirror (TT TRM) method and system includes a radio transceiver for transmitting a series of short pulses repeatedly at a period T and for receiving from a remote node a return signal that is a retransmission of the original signal at the same period T: a clock circuit for inputting a clock signal to the transceiver: and a computer for (i) computing and generating an imaginary time-reversed signal version of the original signal, (ii) comparing the return signal with the imaginary version. (iii) computing a delay between the return signal and the imaginary version that is substantially equal to twice the time difference between the two nodes, and (iv) applying the computed delay to a clock input calibration for a desired signal. The system includes time transfer using the ionospheric reflection (refraction), producing precise synchronization among remote nodes beyond the line-of-sight and thus without necessitating GPS or communication satellites.
摘要翻译: 时间传输时间反向镜(TT TRM)方法和系统包括用于在周期T反复发射一系列短脉冲的无线电收发器,并且用于从远程节点接收作为相同原始信号的重传的返回信号 周期T:用于向收发机输入时钟信号的时钟电路;以及计算机,用于(i)计算并产生原始信号的虚拟时间反转信号版本,(ii)将返回信号与虚拟版本进行比较。 (iii)计算基本上等于两个节点之间的时间差的两倍的返回信号和虚拟版本之间的延迟,以及(iv)将所计算的延迟应用于期望信号的时钟输入校准。 该系统包括使用电离层反射(折射)的时间转移,在远程节点之间产生精确的同步,从而不需要GPS或通信卫星。
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公开(公告)号:US08350750B2
公开(公告)日:2013-01-08
申请号:US12948841
申请日:2010-11-18
申请人: Eung Gi Paek , Joon Y Choe
发明人: Eung Gi Paek , Joon Y Choe
IPC分类号: G01S13/89
CPC分类号: G01S13/003 , G01S13/42 , G01S13/72 , G01S13/76
摘要: A distributed time reversal mirror array (DTRMA) system includes a plurality of independent, sparsely distributed time reversal mirrors (TRMs). Each of the TRMs includes an antenna; a transceiver connected to the antenna for transmitting a signal toward a target, for receiving a return, reflected signal from the target, and for retransmitting a time-reversed signal toward the target: means for phase-locking and for maintaining spatial and temporal coherences between the TRMs; and a computer including a machine-readable storage media having programmed instructions stored thereon for computing and generating the time-reversed retransmitted signal, thereby providing a phased array functionality for the DTRMA while minimizing distortion from external sources. The DTRMA is capable of operating in an autonomous, unattended, and passive state, owing to the time-reversal's self-focusing feature. The beam may be sharply focused on the target due to the coherently synthesized extended aperture over the entire array.
摘要翻译: 分布式时间反转镜阵列(DTRMA)系统包括多个独立的,稀疏分布的时间反转镜(TRM)。 每个TRM包括天线; 连接到天线的收发器,用于向目标发送信号,用于接收来自目标的返回反射信号,以及向目标发射时间反转信号:用于相位锁定和用于维持空间和时间相干性的装置 TRMs; 以及包括其上存储有编程指令的机器可读存储介质的计算机,用于计算和产生时间反转的重传信号,从而为DTRMA提供相控阵列功能,同时最小化来自外部源的失真。 由于时间反转的自我聚焦功能,DTRMA能够以自主,无人值守和被动状态运行。 由于在整个阵列上的相干合成的扩展孔,光束可能会尖锐地聚焦在目标上。
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公开(公告)号:US07671799B1
公开(公告)日:2010-03-02
申请号:US12145601
申请日:2008-06-25
申请人: Eung Gi Paek , Mark G Parent , Joon Y Choe
发明人: Eung Gi Paek , Mark G Parent , Joon Y Choe
CPC分类号: H01Q3/267 , H01Q1/405 , H01Q3/2676 , H01Q7/00 , H01Q9/26 , H01Q15/0053 , H01Q21/061
摘要: A phased array antenna system includes an RF front end, a radome, and an optical calibrator embedded in the radome for enabling in-situ calibration of the RF front end. The optical calibrator employs an optical timing signal generator (OTSG), a Variable Optical Amplitude and Delay Generator array (VOADGA) for receiving the modulated optical output signal and generating a plurality of VOADGA timing signals, and an optical timing signal distributor (OTSD). The in-situ optical calibrator allows for reduced calibration time and makes it feasible to perform calibration whenever necessary.
摘要翻译: 相控阵天线系统包括RF前端,天线罩和嵌入天线罩中的光学校准器,用于实现RF前端的原位校准。 光学校准器采用光学定时信号发生器(OTSG),可变光学幅度和延迟发生器阵列(VOADGA),用于接收调制的光输出信号并产生多个VOADGA定时信号,以及光学定时信号分配器(OTSD)。 原位光学校准器允许减少校准时间,并使得在必要时进行校准是可行的。
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公开(公告)号:US07535409B1
公开(公告)日:2009-05-19
申请号:US11612153
申请日:2006-12-18
申请人: Joon Y Choe , Eung Gi Paek
发明人: Joon Y Choe , Eung Gi Paek
CPC分类号: G01S13/426 , G01S7/282 , G01S2013/0227 , G01S2013/0254 , H01Q3/30 , H01Q3/40
摘要: A time-reversal imaging radar system for acquiring an image of a remote target includes an antenna array having a plurality of spaced-apart antennas, and a transceiver coupled to the antenna array for alternately transmitting a radar signal via the antenna array toward the target and for receiving target-reflected radar signals. The transceiver includes means for multiple-pass time-reversing the transmitted and received radar signals whereby coherent beam focusing is realized at both the target and at the receiver to thereby enhance the resolution of the acquired target image.
摘要翻译: 用于获取远程目标的图像的时间反转成像雷达系统包括具有多个间隔开的天线的天线阵列和耦合到天线阵列的收发器,用于经由天线阵列朝向目标交替地发射雷达信号, 用于接收目标反射的雷达信号。 收发器包括用于多次时间反转发射和接收的雷达信号的装置,由此在目标和接收机处实现相干光束聚焦,从而增强所获取的目标图像的分辨率。
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公开(公告)号:US07408507B1
公开(公告)日:2008-08-05
申请号:US11376633
申请日:2006-03-14
申请人: Eung Gi Paek , Mark Parent , Joon Y Choe
发明人: Eung Gi Paek , Mark Parent , Joon Y Choe
CPC分类号: H01Q3/267 , H01Q1/405 , H01Q3/2676 , H01Q7/00 , H01Q9/26 , H01Q15/0053 , H01Q21/061
摘要: A phased array antenna system includes an RF front end, a radome, and an optical calibrator embedded in the radome for enabling in-situ calibration of the RF front end. The optical calibrator employs an optical timing signal generator (OTSG), a Variable Optical Amplitude and Delay Generator array (VOADGA) for receiving the modulated optical output signal and generating a plurality of VOADGA timing signals, and an optical timing signal distributor (OTSD). The in-situ optical calibrator allows for reduced calibration time and makes it feasible to perform calibration whenever necessary.
摘要翻译: 相控阵天线系统包括RF前端,天线罩和嵌入天线罩中的光学校准器,用于实现RF前端的原位校准。 光学校准器采用光学定时信号发生器(OTSG),可变光学幅度和延迟发生器阵列(VOADGA),用于接收调制的光输出信号并产生多个VOADGA定时信号,以及光学定时信号分配器(OTSD)。 原位光学校准器允许减少校准时间,并使得在必要时进行校准是可行的。
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公开(公告)号:US20120127020A1
公开(公告)日:2012-05-24
申请号:US12948841
申请日:2010-11-18
申请人: Eung Gi Paek , Joon Y. Choe
发明人: Eung Gi Paek , Joon Y. Choe
IPC分类号: G01S13/00
CPC分类号: G01S13/003 , G01S13/42 , G01S13/72 , G01S13/76
摘要: A distributed time reversal mirror array (DTRMA) system includes a plurality of independent, sparsely distributed time reversal mirrors (TRMs). Each of the TRMs includes an antenna; a transceiver connected to the antenna for transmitting a signal toward a target, for receiving a return, reflected signal from the target, and for retransmitting a time-reversed signal toward the target; means for phase-locking and for maintaining spatial and temporal coherences between the TRMs; and a computer including a machine-readable storage media having programmed instructions stored thereon for computing and generating the time-reversed retransmitted signal, thereby providing a phased array functionality for the DTRMA while minimizing distortion from external sources. The DTRMA is capable of operating in an autonomous, unattended, and passive state, owing to the time-reversal's self-focusing feature. The beam may be sharply focused on the target due to the coherently synthesized extended aperture over the entire array.
摘要翻译: 分布式时间反转镜阵列(DTRMA)系统包括多个独立的,稀疏分布的时间反转镜(TRM)。 每个TRM包括天线; 连接到天线的收发器,用于向目标发送信号,用于从目标接收返回的反射信号,并向目标发送时间反转信号; 用于相位锁定和维持TRM之间的空间和时间相干的手段; 以及包括其上存储有编程指令的机器可读存储介质的计算机,用于计算和产生时间反转的重传信号,从而为DTRMA提供相控阵列功能,同时最小化来自外部源的失真。 由于时间反转的自我聚焦功能,DTRMA能够以自主,无人值守和被动状态运行。 由于在整个阵列上的相干合成的扩展孔,光束可能会尖锐地聚焦在目标上。
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公开(公告)号:US08264397B2
公开(公告)日:2012-09-11
申请号:US12911817
申请日:2010-10-26
申请人: Eung Gi Paek , Joon Y Choe
发明人: Eung Gi Paek , Joon Y Choe
IPC分类号: G01S13/00
CPC分类号: G01S13/003 , G01S13/0218 , G01S13/103
摘要: A Time Transfer Time Reverse Mirror (TT TRM) method and system includes a radio transceiver for transmitting a series of short pulses repeatedly at a period T and for receiving from a remote node a return signal that is a retransmission of the original signal at the same period T: a clock circuit for inputting a clock signal to the transceiver: and a computer for (i) computing and generating an imaginary time-reversed signal version of the original signal, (ii) comparing the return signal with the imaginary version, (iii) computing a delay between the return signal and the imaginary version that is substantially equal to twice the time difference between the two nodes, and (iv) applying the computed delay to a clock input calibration for a desired signal. The system includes time transfer using the ionospheric reflection (refraction), producing precise synchronization among remote nodes beyond the line-of-sight and thus without necessitating GPS or communication satellites.
摘要翻译: 时间传输时间反向镜(TT TRM)方法和系统包括用于在周期T反复发射一系列短脉冲的无线电收发器,并且用于从远程节点接收作为相同原始信号的重传的返回信号 周期T:用于向收发机输入时钟信号的时钟电路;以及计算机,用于(i)计算并产生原始信号的虚拟时间反转信号版本,(ii)将返回信号与虚拟版本进行比较( iii)计算返回信号和虚拟版本之间的延迟,其基本上等于两个节点之间的时间差的两倍,以及(iv)将所计算的延迟应用于期望信号的时钟输入校准。 该系统包括使用电离层反射(折射)的时间转移,在远程节点之间产生精确的同步,从而不需要GPS或通信卫星。
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