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公开(公告)号：US08339315B2
公开(公告)日：2012-12-25
申请号：US12646444
申请日：2009-12-23
申请人： Russell Gavin Morrison , Alasdair Ward Helliwell , David Charles Lancashire , Charles Stephen Dixon
发明人： Russell Gavin Morrison , Alasdair Ward Helliwell , David Charles Lancashire , Charles Stephen Dixon
IPC分类号： G01S1/08
摘要： A positioning system (1) comprising one or more transmitters configured to transmit transmissions including positioning data, wherein the system is configured to synchronize the transmission with a reference time. The transmissions are formed using a repeating pseudorandom number (PRN) code comprising a plurality of chips. The system (1) is configured to determine a timing bias (44;54) between the first transmission and the reference time. The system (1) is configured to change the number of chips in one or more of said transmissions such that the timing bias of a subsequent pseudorandom number (PRN) code is reduced.
摘要翻译： 一种定位系统（1），包括被配置为发送包括定位数据的传输的一个或多个发射机，其中所述系统被配置为使所述传输与参考时间同步。 使用包括多个码片的重复伪随机数（PRN）码来形成发送。 系统（1）被配置为确定第一传输和参考时间之间的定时偏差（44; 54）。 系统（1）被配置为改变所述传输中的一个或多个中的码片数量，使得后续伪随机数（PRN）码的定时偏移减小。
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公开(公告)号：US20100265123A1
公开(公告)日：2010-10-21
申请号：US12504933
申请日：2009-07-17
CPC分类号： H01Q3/36 , G01S13/9035 , G01S2013/0254 , H01Q3/385 , H01Q21/0006 , H01Q21/22
摘要： A radar system is disclosed for forming a scanning receive beam from signals received by a phased array having a plurality of sub arrays. An exemplary radar system includes a plurality of phase units each configured to receive a signal from one or more sub arrays. Each phase unit includes a waveform generator configured to generate an analog waveform having a frequency corresponding to a time-varying phase shift. Each waveform generator is arranged to digitally generate the analog waveform, and output a comparison of the received signal with the waveform, incorporating the time-varying phase shift. The system further includes a combining unit configured to combine the outputs from the plurality of phase units to form a scanning receive beam.
摘要翻译： 公开了用于由具有多个子阵列的相控阵列接收的信号形成扫描接收波束的雷达系统。 示例性雷达系统包括多个相位单元，每个相位单元被配置为从一个或多个子阵列接收信号。 每个相位单元包括波形发生器，其被配置为产生具有对应于时变相移的频率的模拟波形。 每个波形发生器被布置成数字地产生模拟波形，并且输出接收信号与波形的比较，并结合时变相移。 该系统还包括组合单元，其被配置为组合来自多个相位单元的输出以形成扫描接收波束。
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公开(公告)号：US20090051587A1
公开(公告)日：2009-02-26
申请号：US11662520
申请日：2006-11-15
IPC分类号： G01S13/90
CPC分类号： G01S13/90 , G01S7/2926 , G01S13/22 , G01S13/9035
摘要： A method of operating synthetic aperture radar in a low PRF mode, comprising generating a stream of radar pulses, imposing onto said stream a predetermined modulation of the Pulse Repetition Frequency (PRF), directing said stream to a target area, and processing received pulses, comprising separating the received pulses as a sequence of sets, and superposing received radar pulses of said sets, whereby to enhance the central received lobe and to attenuate side lobes.
摘要翻译： 一种以低PRF模式操作合成孔径雷达的方法，包括产生雷达脉冲流，将脉冲重复频率（PRF）的预定调制施加到所述流上，将所述流引导到目标区域，以及处理接收到的脉冲， 包括将所接收的脉冲作为一组序列分离，并叠加所述组的接收的雷达脉冲，从而增强中心接收的波瓣并衰减旁瓣。
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公开(公告)号：US20110074628A1
公开(公告)日：2011-03-31
申请号：US12646444
申请日：2009-12-23
申请人： Russell Gavin Morrison , Alasdair Ward Helliwell , David Charles Lancashire , Charles Stephen Dixon
发明人： Russell Gavin Morrison , Alasdair Ward Helliwell , David Charles Lancashire , Charles Stephen Dixon
IPC分类号： G01S19/11
摘要： A positioning system (1) comprising one or more transmitters configured to transmit transmissions including positioning data, wherein the system is configured to synchronise the transmission with a reference time. The transmissions are formed using a repeating pseudorandom number (PRN) code comprising a plurality of chips. The system (1) is configured to determine a timing bias (44;54) between the first transmission and the reference time. The system (1) is configured to change the number of chips in one or more of said transmissions such that the timing bias of a subsequent pseudorandom number (PRN) code is reduced.
摘要翻译： 一种定位系统（1），包括被配置为发送包括定位数据的传输的一个或多个发射机，其中所述系统被配置为使所述传输与参考时间同步。 使用包括多个码片的重复伪随机数（PRN）码来形成发送。 系统（1）被配置为确定第一传输和参考时间之间的定时偏差（44; 54）。 系统（1）被配置为改变所述传输中的一个或多个中的码片数量，使得后续伪随机数（PRN）码的定时偏移减小。
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公开(公告)号：US08362944B2
公开(公告)日：2013-01-29
申请号：US12504933
申请日：2009-07-17
CPC分类号： H01Q3/36 , G01S13/9035 , G01S2013/0254 , H01Q3/385 , H01Q21/0006 , H01Q21/22
摘要： A radar system is disclosed for forming a scanning receive beam from signals received by a phased array having a plurality of sub arrays. An exemplary radar system includes a plurality of phase units each configured to receive a signal from one or more sub arrays. Each phase unit includes a waveform generator configured to generate an analog waveform having a frequency corresponding to a time-varying phase shift. Each waveform generator is arranged to digitally generate the analog waveform, and output a comparison of the received signal with the waveform, incorporating the time-varying phase shift. The system further includes a combining unit configured to combine the outputs from the plurality of phase units to form a scanning receive beam.
摘要翻译： 公开了用于由具有多个子阵列的相控阵列接收的信号形成扫描接收波束的雷达系统。 示例性雷达系统包括多个相位单元，每个相位单元被配置为从一个或多个子阵列接收信号。 每个相位单元包括波形发生器，其被配置为产生具有对应于时变相移的频率的模拟波形。 每个波形发生器被布置成数字地产生模拟波形，并且输出接收信号与波形的比较，并结合时变相移。 该系统还包括组合单元，其被配置为组合来自多个相位单元的输出以形成扫描接收波束。
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公开(公告)号：US07705766B2
公开(公告)日：2010-04-27
申请号：US11662520
申请日：2006-11-15
CPC分类号： G01S13/90 , G01S7/2926 , G01S13/22 , G01S13/9035
摘要： A method of operating synthetic aperture radar in a low PRF mode, comprising generating a stream of radar pulses, imposing onto said stream a predetermined modulation of the Pulse Repetition Frequency (PRF), directing said stream to a target area, and processing received pulses, comprising separating the received pulses as a sequence of sets, and superposing received radar pulses of said sets, whereby to enhance the central received lobe and to attenuate side lobes.
摘要翻译： 一种以低PRF模式操作合成孔径雷达的方法，包括产生雷达脉冲流，将脉冲重复频率（PRF）的预定调制施加到所述流上，将所述流引导到目标区域，以及处理接收到的脉冲， 包括将所接收的脉冲作为一组序列分离，并叠加所述组的接收的雷达脉冲，由此增强中心接收的波瓣并衰减旁瓣。
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