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    • 2. 发明授权
    • Method for detecting a message sent by an interrogator or a transponder in mode S
    • 用于在模式S中检测由询问器或应答器发送的消息的方法
    • US09024803B2
    • 2015-05-05
    • US13375944
    • 2010-04-19
    • Dominique RobinLaurent BelmonClaude Provost
    • Dominique RobinLaurent BelmonClaude Provost
    • G01S13/00G01S13/78G01S13/76
    • G01S13/782G01S13/767
    • A method for detecting a message provided with a preamble with a number of pulses in a signal sent by an interrogator or a transponder in mode S, said method including a step for decomposition of said signal into an amplitude signal and into a complex phase signal, a step for detection of said preamble by correlating the amplitude signal with a replica signal of the expected pulses, and a phase control step executed by adding together the samples of the phase signal for the duration of the pulses of said preamble and by comparing the sum obtained with a threshold. The method may include a step for time synchronization by correlation of the complex phase signal with a reference sequence formed by one or more known bits before the decoding of the data. The method applies notably to the decoding of interrogation messages borne by low-power signals.
    • 一种用于在模式S中用于检测由询问器或应答器发送的信号中具有多个脉冲的前导码的消息的方法,所述方法包括将所述信号分解成振幅信号并转换成复相位信号的步骤, 通过将幅度信号与期望脉冲的复制信号相关联来检测所述前导码的步骤,以及相位控制步骤,通过将所述前同步码的脉冲持续时间内的相位信号的样本相加, 用阈值获得。 该方法可以包括通过在数据解码之前将复相位信号与由一个或多个已知比特形成的参考序列相关的时间同步的步骤。 该方法特别适用于由低功率信号承载的询问消息的解码。
    • 4. 发明授权
    • Reply detection in a secondary surveillance radar
    • 二次监视雷达中的回复检测
    • US08259000B2
    • 2012-09-04
    • US12676298
    • 2008-09-03
    • Fabrizio FioriGaspare GalatiStefano GelliEmilio Giuseppe Piracci
    • Fabrizio FioriGaspare GalatiStefano GelliEmilio Giuseppe Piracci
    • G01S13/00
    • G01S13/784G01S7/2922G01S13/782
    • The present invention relates to a detecting device for detecting an SSR signal having a characteristic structure. The detecting device comprises filtering means matched to the characteristic structure of the SSR signal, and means for maintaining a false-alarm rate at a substantially constant value. The characteristic structure of the SSR signal comprises either a preamble or an initial pulse and a final pulse separated by a fixed dwell time. The means for maintaining a false-alarm rate at a substantially constant value comprise computing means configured to compute a detection threshold on the basis of a signal supplied by the filtering means, and decision means configured to detect the SSR signal on the basis of the detection threshold and of the signal supplied by the filtering means.
    • 本发明涉及一种用于检测具有特征结构的SSR信号的检测装置。 检测装置包括与SSR信号的特征结构相匹配的滤波装置,以及用于将误报率维持在基本上恒定的值的装置。 SSR信号的特征结构包括前同步码或初始脉冲,以及由固定停留时间分离的最终脉冲。 用于将假警报速率保持在基本上恒定的值的装置包括被配置为基于由滤波装置提供的信号来计算检测阈值的计算装置,以及被配置为基于检测来检测SSR信号的判定装置 阈值和由滤波装置提供的信号。
    • 5. 发明授权
    • Transponder-based beacon transmitter for see and avoid of unmanned aerial vehicles
    • 基于发射机的信标发射机,用于查看和避免无人机
    • US07969346B2
    • 2011-06-28
    • US12246644
    • 2008-10-07
    • Michael R. FranceschiniDavid W. MeyersKelly P. Muldoon
    • Michael R. FranceschiniDavid W. MeyersKelly P. Muldoon
    • G08G5/04G01S13/00G01S13/74
    • G01S13/782G01S13/765G01S13/9303H04W4/046
    • A transponder-based beacon transmitter system in an unmanned aerial vehicle is provided. The transponder-based beacon transmitter system comprises a global positioning system interface communicatively coupled to receive position information indicative of a current location of the unmanned aerial vehicle, a message formatter communicatively coupled to the global positioning system interface, and a transponder-based beacon transmitter. The message formatter formats vehicle identification of the unmanned aerial vehicle and the position information indicative of the current location of the unmanned aerial vehicle into an automatic dependent surveillance broadcast mode-select squitter message. The message formatter operates in one of a military mode, a National Airspace System mode, and a combined military/National Airspace System mode. The transponder-based beacon transmitter transmits the automatic dependent surveillance broadcast mode-select squitter messages from the unmanned aerial vehicle. Receivers in the vicinity of the unmanned aerial vehicle receive unsolicited vehicle identification and location of the unmanned aerial vehicle.
    • 提供了一种无人机中的基于应答器的信标发射机系统。 基于应答器的信标发射机系统包括通信地耦合以接收指示无人驾驶飞行器的当前位置的位置信息的全球定位系统接口,通信地耦合到全球定位系统接口的消息格式化器,以及基于应答器的信标发射机。 消息格式化器将无人机的车辆识别和指示无人驾驶飞行器的当前位置的位置信息形成为自动依赖监视广播模式选择脉冲消息。 信息格式化器以军事模式,国家空域系统模式和军事/国家空域系统组合模式运行。 基于应答器的信标发射机从无人驾驶飞行器发送自动相关监视广播模式选择脉冲信号。 无人驾驶飞机附近的接收器接收无人驾驶飞行器的未经请求的车辆识别和位置。
    • 6. 发明申请
    • SECONDARY SURVEILLANCE RADAR AND METHOD OF ANALYZING REPLIES FOR SECONDARY SURVEILLANCE RADAR
    • 二次监测雷达和二次监测雷达分析方法
    • US20100253566A1
    • 2010-10-07
    • US11627552
    • 2007-01-26
    • Masami INO
    • Masami INO
    • G01S13/91G01S13/93G01S13/87
    • G01S13/782
    • Provided is a secondary surveillance radar with an improved capability of eliminating an unnecessary Mode A/C target report, which includes a transmission unit transmitting interrogations, a reception unit receiving replies, from a transponder, corresponding respectively to the interrogations, and a signal processing unit generating a Mode S target report and a Mode A/C target report from the replies. The radar also includes a combiner generating a Mode S track and a Mode A/C track respectively from the Mode S and the Mode A/C reports, and then judging whether the Mode S report and the Mode A/C report are of the same target on the basis of the Mode S and the Mode A/C tracks. When the Mode S and the Mode A/C reports are of the same target, the combiner rejects the Mode A/C report.
    • 提供了一种二次监视雷达,其具有消除不必要的模式A / C目标报告的能力的提高,该目标报告包括发送单元发送询问,接收单元从应答器接收分别对应于询问的回复,以及信号处理单元 从回复中生成模式S目标报告和模式A / C目标报告。 雷达还包括从模式S和模式A / C报告分别生成模式S轨道和模式A / C轨道的组合器,然后判断模式S报告和模式A / C报告是否相同 目标在模式S和模式A / C轨道的基础上。 当模式S和模式A / C报告具有相同的目标时,组合器拒绝模式A / C报告。
    • 7. 发明授权
    • Method for pre-detecting responses in a secondary radar or application to the detection of mode S responses
    • 在二次雷达或应用中预先检测响应以检测模式S响应的方法
    • US07688250B2
    • 2010-03-30
    • US10575075
    • 2004-09-29
    • Philippe Jean BillaudClaude Rene De Volder
    • Philippe Jean BillaudClaude Rene De Volder
    • G01S13/87G01S7/292G01S13/74G01S13/00
    • G01S13/782G01S13/781G01S13/784
    • The invention relates to a method for pre-detecting responses in a secondary radar. It applies in particular to the detection of mode S responses. An aim of the invention is to process the signals received before decoding the responses so as to allow the detection of mixed responses, and avoid the detection of ghost responses. For this purpose, the invention has in particular as subject a method for pre-detecting responses in a secondary radar, the responses to be pre-detected comprising a message coded by a modulated signal, characterized in that the presence of a signal exhibiting modulation characteristics in accordance with those of a message of a response to be pre-detected is identified; the duration of the signal identified is measured; this duration is compared with a minimum duration, this minimum duration being determined on the basis of the duration of the messages of the responses to be pre-detected.
    • 本发明涉及一种用于预先检测次级雷达中的响应的方法。 它特别适用于模式S响应的检测。 本发明的目的是处理在解码响应之前接收到的信号,以便允许检测混合响应,并避免检测到幽灵响应。 为此目的,本发明特别地作为一种用于预先检测次级雷达中的响应的方法,预先检测的响应包括由调制信号编码的消息,其特征在于存在具有调制特性的信号 根据预先检测到的响应的消息进行识别; 测量所识别信号的持续时间; 将该持续时间与最小持续时间进行比较,该最小持续时间是基于要预先检测的响应的消息的持续时间来确定的。