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1. 发明申请

US20060057959A1 Radio having a MEMS preselect filter 失效
标题翻译：具有MEMS预选滤波器的无线电
公开(公告)号：US20060057959A1
公开(公告)日：2006-03-16
申请号：US10938482
申请日：2004-09-10
申请人： David Vacanti , Ijaz Jafri , Keith Bayern
发明人： David Vacanti , Ijaz Jafri , Keith Bayern
IPC分类号： H03H7/00
CPC分类号： H03H9/462
摘要： The present invention provides systems and methods for pre-filter in a VHF receiver using Micro-Electro-Mechanical Systems (MEMS) filters. The system includes an antenna, and first and second Micro-Electro-Mechanical Systems (MEMS) filters. The first MEMS filter filters a signal received by the antenna based on a first pre-defined bandwidth, and the second MEMS filter filters the signal filtered by the first MEMS filter based on a second bandwidth. The system also includes an analog to digital converter that converts the signal filtered by the second MEMS filter into a digital signal, a down converter that down converts the digital signal produced by the A to D converter, and a digital signal processor that processes the down converted digital signal produced by the down converter. The first and second MEMS filters or the down converter are adjustable based on a received tuning signal.
摘要翻译：本发明提供了使用微机电系统（MEMS）滤波器在VHF接收机中进行预滤波的系统和方法。该系统包括天线以及第一和第二微机电系统（MEMS）滤波器。第一MEMS滤波器基于第一预定义带宽对由天线接收的信号进行滤波，并且第二MEMS滤波器基于第二带宽对由第一MEMS滤波器滤波的信号进行滤波。该系统还包括将由第二MEMS滤波器滤波的信号转换为数字信号的模数转换器，将由A转D转换器产生的数字信号下变频的下变频器以及处理下降的数字信号处理器由转换器产生的转换数字信号。第一和第二MEMS滤波器或降压转换器可基于接收到的调谐信号来调节。

2. 发明申请

US20070139259A1 SYSTEMS AND METHODS FOR SELF-TEST OF A RADAR ALTIMETER 有权
标题翻译：雷达高度计自动测试系统和方法
公开(公告)号：US20070139259A1
公开(公告)日：2007-06-21
申请号：US11306185
申请日：2005-12-19
申请人： David Vacanti
发明人： David Vacanti
IPC分类号： G01S7/40
CPC分类号： G01S7/4004 , G01S7/35 , G01S13/34 , G01S13/882 , H03L7/06
摘要： Systems and methods for testing a signal generated by a Direct Digital Synthesizer (DDS) in a radar altimeter. In an embodiment of the method, a voltage signal derived by comparing a fixed reference frequency to a ramped frequency signal generated by the DDS based on a clock-based reference signal is generated. The generated voltage signal is integrated over a predefined range of clock signals. The integration is sampled at a previously defined clock tick. The sample is compared to a desired value and an indication that the radar altimeter is malfunctioning is provided if the comparison exceeds a predefined threshold value. The radar altimeter system is deactivated if an indication that the radar altimeter is malfunctioning has been provided.
摘要翻译：用于测试由雷达高度计中的直接数字合成器（DDS）产生的信号的系统和方法。在该方法的实施例中，产生通过基于基于时钟的参考信号将固定参考频率与由DDS产生的斜坡频率信号进行比较而导出的电压信号。所产生的电压信号被集成在预定范围的时钟信号上。在以前定义的时钟刻度上对积分进行采样。如果比较超过预定义的阈值，则将样本与期望值进行比较，并且提供雷达高度计故障的指示。如果提供了雷达高度计发生故障的指示，则雷达测高仪系统将被停用。

3. 发明申请

US20060049977A1 Navigation system 有权
标题翻译：导航系统
公开(公告)号：US20060049977A1
公开(公告)日：2006-03-09
申请号：US11018886
申请日：2004-12-21
申请人： David Vacanti
发明人： David Vacanti
IPC分类号： G01S13/08
CPC分类号： G01S7/006 , G01S7/35 , G01S13/882
摘要： A radar altimeter system with a closed-loop modulation for generating more accurate radar altimeter values. The present invention combines flight safety critical sensors into a common platform to permit autonomous or semi-autonomous landing, enroute navigation and complex precision approaches in all weather conditions. An Inertial Navigation System (INS) circuit board, a radar altimeter circuit board and a Global Navigation Satellite System (GNSS) circuit board are housed in a single chassis. VHF (Very High Frequency) Omni-directional Radio (VOR), Marker Beacon (MB), and VDB (VHF Data Broadcast) receiver circuit boards may also be implemented on circuit boards in the chassis.
摘要翻译：具有闭环调制的雷达高度计系统，用于产生更准确的雷达高度计值。本发明将飞行安全关键传感器组合到通用平台中，以允许在所有天气条件下进行自主或半自主着陆，导航导航和复杂的精确方法。惯性导航系统（INS）电路板，雷达高度计电路板和全球导航卫星系统（GNSS）电路板被安装在单个机箱中。 VHF（超高频）全向无线电（VOR），标记信标（MB）和VDB（VHF数据广播）接收机电路板也可以在机箱中的电路板上实现。

4. 发明申请

US20070139261A1 SYSTEMS AND METHODS FOR SELF-CALIBRATING A RADAR ALTIMETER 有权
标题翻译：用于自动校准雷达高度计的系统和方法
公开(公告)号：US20070139261A1
公开(公告)日：2007-06-21
申请号：US11306183
申请日：2005-12-19
申请人： David Vacanti
发明人： David Vacanti
IPC分类号： G01S7/40
CPC分类号： G01S7/4056 , G01S7/35 , G01S13/882
摘要： Systems and methods for performing self calibration of a radar altimeter. An example system includes a first component that generates a simulated return signal based on one or more range values. A transmitter generates a transmission radar signal and a receiver processes the simulated return signal based on the transmission radar signal. A second component determines one or more calibration factors based on the processed simulated return signal and ideal return signal characteristics. The transmission radar signal is a fixed frequency signal and the first component includes a programmable frequency divider that creates at least on sideband of a known signal. A third component determines if the radar system is in at least one of a calibration mode or normal mode of operation. If the radar system is determined to be in a normal mode of operation, a fourth component applies the determined calibration factors to actual radar return signals.
摘要翻译：执行雷达测高仪自校准的系统和方法。示例系统包括基于一个或多个范围值产生模拟返回信号的第一组件。发射机产生传输雷达信号，接收机根据传输雷达信号处理仿真的返回信号。第二组件基于处理的仿真返回信号和理想的返回信号特性来确定一个或多个校准因子。传输雷达信号是固定频率信号，并且第一分量包括至少创建已知信号的边带的可编程分频器。第三组件确定雷达系统是否处于校准模式或正常操作模式中的至少一个。如果确定雷达系统处于正常操作模式，第四个组件将确定的校准因子应用于实际的雷达返回信号。

5. 发明申请

US20060044182A1 Radar altimeter 有权
标题翻译：雷达高度表
公开(公告)号：US20060044182A1
公开(公告)日：2006-03-02
申请号：US10926676
申请日：2004-08-26
申请人： David Vacanti
发明人： David Vacanti
IPC分类号： G01S13/08 , G01S7/40
CPC分类号： G01S13/882 , G01S7/032 , G01S7/35
摘要： The present invention provides a radar altimeter system with a closed loop modulation for generating more accurate radar altimeter values. The system includes an antenna, a circulator, a receiver, and a transmitter. The circulator receives or sends a radar signal from/to the antenna. The receiver receives the received radar signal via the circulator. The transmitter generates a radar signal and includes a phase-locked loop circuit for generating the radar signal based on a pre-defined phase signal. The transmitter includes a direct digital synthesizer that generates the phase signal based on a pre-defined clock signal and a control signal. The system includes a digital signal processor and a tail strike warning processor that determine position of a tail of the aircraft relative to ground and present an alert if a warning condition exists based on the determined position of the tail of the aircraft and a predefined threshold.
摘要翻译：本发明提供一种具有闭环调制的雷达高度计系统，用于产生更精确的雷达高度计值。该系统包括天线，循环器，接收器和发射器。循环器从天线接收或发送雷达信号。接收机通过循环器接收接收到的雷达信号。发射机产生雷达信号，并包括用于基于预定义的相位信号产生雷达信号的锁相环电路。发射机包括直接数字合成器，其基于预定义的时钟信号和控制信号产生相位信号。该系统包括数字信号处理器和尾部警告处理器，其确定飞行器相对于地面的尾部的位置，并且如果基于确定的飞行器尾部的位置和预定义的阈值而存在警告条件，则呈现警报。

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