公开(公告)号：US4731870A

公开(公告)日：1988-03-15

申请号：US674128

申请日：1984-11-23

申请人： Harold D. Black ,  John Daniels ,  Nadav Levanon ,  Thomas E. Strikwerda

发明人： Harold D. Black ,  John Daniels ,  Nadav Levanon ,  Thomas E. Strikwerda

IPC分类号： H04B1/04 ,  H04B1/16 ,  H04B7/185 ,  H01Q11/12

CPC分类号： H04B7/18576 ,  H04B1/1607 ,  H04B1/04 ,  H04B7/18517

摘要： An improved platform transmitter terminal (PTT) is disclosed for use in an ARGOS type satellite system. The PTT has reduced size, weight and extended life due to a solar array/rechargeable battery power source operating under the supervision of a unique power supply control and protection means. The invented PTT, when used in an ARGOS type system, opens the possibility of tracking, on a global basis, wild animals weighing as little as a few kilograms.

摘要翻译： 公开了一种用于ARGOS型卫星系统的改进的平台发射机终端（PTT）。 由于在独特的电源控制和保护装置的监督下操作的太阳能阵列/可充电电池电源，PTT减小了尺寸，重量和延长的使用寿命。 发明的PTT在ARGOS型系统中使用时，可以在全球范围内追踪重达几公斤的野生动物。

公开(公告)号：US06392588B1

公开(公告)日：2002-05-21

申请号：US09564650

申请日：2000-05-03

申请人： Nadav Levanon

发明人： Nadav Levanon

IPC分类号： G01S7282

CPC分类号： G01S13/288

摘要： A multifrequency phase-coded signal structure is presented for use in a system like a radar or sonar or detecting a remote target. The signal structure comprises at least one pulse signal in the form of a mutually complementary set of M sequences, each sequence being composed of M phase-modulated bits. Each two adjacent sequences are modulated on subcarriers separated by a frequency fs such that fs=1/tb, tb being a bit duration, and a the subcarriers are transmitted simultaneously.

摘要翻译： 提供了多频相位编码信号结构，用于诸如雷达或声纳的系统或检测远程目标。 该信号结构包括M个序列的相互互补集合形式的至少一个脉冲信号，每个序列由M个相位调制比特组成。 每两个相邻序列在由频率fs分离的子载波上进行调制，使得fs = 1 / tb，tb为比特持续时间，并且副载波同时传输。

公开(公告)号：US06327534B1

公开(公告)日：2001-12-04

申请号：US08723725

申请日：1996-09-30

申请人： Nadav Levanon ,  Edward B. Victor ,  Sridhar Vembu

发明人： Nadav Levanon ,  Edward B. Victor ,  Sridhar Vembu

IPC分类号： G06G778

CPC分类号： G01S5/12 ,  G01S2205/008

摘要： A system and method for unambiguously determining the position of a user terminal (for example, a mobile wireless telephone) in a low-Earth orbit satellite communications system. The system includes a user terminal, at least two satellites with known positions and known velocities, and a gateway (that is, a terrestrial base station) for communicating with the user terminal through the satellites. The method includes the steps of determining a range parameter, a range difference parameter, and either or both of a range-rate parameter and a range-rate difference parameter. A range parameter represents a distance between one of the satellites and the user terminal. A range difference parameter represents the difference between (1) the distance between a first one of the satellites and the user terminal and (2) the distance between a second one of the satellites and the user terminal. A range-rate parameter represents a relative radial velocity between one of the satellites and the user terminal. A range-rate difference parameter represents the difference between (a) a relative radial velocity between a first one of the satellites and the user terminal and (b) a relative radial velocity between a second one of the satellites and the user terminal. The position of the user terminal on the Earth's surface is then determined based on the known positions and known velocities of the satellites, the range parameter, the range difference parameter, and either or both of the range-rate parameter and the range-rate difference parameter.

摘要翻译： 一种用于明确地确定低地球轨道卫星通信系统中的用户终端（例如，移动无线电话）的位置的系统和方法。 该系统包括用户终端，具有已知位置和已知速度的至少两个卫星，以及用于通过卫星与用户终端进行通信的网关（即，地面基站）。 该方法包括确定范围参数，范围差参数以及范围速率参数和范围速率差参数中的一个或两个的步骤。 范围参数表示其中一个卫星与用户终端之间的距离。 范围差参数表示（1）第一卫星与用户终端之间的距离与（2）第二卫星与用户终端之间的距离之间的差。 距离率参数表示卫星之一和用户终端之间的相对径向速度。 距离率差参数表示（a）第一卫星与用户终端之间的相对径向速度和（b）第二卫星与用户终端之间的相对径向速度之间的差。 然后根据卫星的已知位置和已知速度，范围参数，距离差参数以及范围速率参数和距离率差异中的任一个或两者来确定用户终端在地球表面上的位置 参数。

公开(公告)号：US06366762B1

公开(公告)日：2002-04-02

申请号：US09338163

申请日：1999-06-22

申请人： David S. Miller ,  Nadav Levanon ,  Avneesh Agrawal

发明人： David S. Miller ,  Nadav Levanon ,  Avneesh Agrawal

IPC分类号： H04B1700

CPC分类号： H04B7/1855 ,  G01S5/0036 ,  G01S5/12 ,  G01S2205/008

摘要： A system and method for determining a round trip delay of signals transmitted between first and second objects, such as a satellite and a mobile telephone, that move relative to each other. A first signal is transmitted from the first object to the second object. The first signal is received at the second object after a propagation delay D1, the delay D1 being the time taken by the first signal to traverse from the first object to the second object. A frequency of the first signal is measured at the second object. The second object then transmits to the first object a second signal containing a report of the measured first frequency. The second signal is received at the first object after a propagation delay D2, D2 being the time taken by the second signal to traverse from the second object to the first object. The first object measures a frequency of the second signal. The first object then determines the range between the first and second object from the measured overall delay and the measured frequencies of the first and second signals.

摘要翻译： 一种用于确定在相对于彼此移动的第一和第二对象（例如卫星和移动电话）之间传输的信号的往返行程延迟的系统和方法。 第一信号从第一对象发送到第二对象。 第一个信号在传播延迟D1之后的第二个物体处被接收，延迟D1是第一个信号从第一个物体穿过到第二个物体所花费的时间。 在第二物体处测量第一信号的频率。 然后，第二对象向第一对象发送包含所测量的第一频率的报告的第二信号。 在传播延迟D2之后，在第一对象处接收第二信号，D2是第二信号从第二对象穿过第一对象所花费的时间。 第一个对象测量第二个信号的频率。 然后，第一个对象从测量的总延迟和第一和第二信号的测量频率确定第一和第二对象之间的范围。

公开(公告)号：US06282500B1

公开(公告)日：2001-08-28

申请号：US09149467

申请日：1998-09-09

申请人： Avneesh Agrawal ,  Rajiv Vijayan ,  Nadav Levanon

发明人： Avneesh Agrawal ,  Rajiv Vijayan ,  Nadav Levanon

IPC分类号： H04B110

CPC分类号： G01S1/045 ,  G01R29/0892 ,  H03J7/04 ,  H04L27/0014 ,  H04L2027/0067

摘要： An apparatus and method for generating an accumulated phase measurement of a communications signal over a predetermined time interval. A frequency estimate of the signal is generated; the frequency estimate is then converted to a coarse phase measurement. A phase error is generated based on the frequency estimate; the phase error is then converted to a fine phase measurement. The coarse and fine phase measurements are summed to yield an accumulated phase measurement.

摘要翻译： 一种用于在预定时间间隔内产生通信信号的累积相位测量的装置和方法。 产生信号的频率估计; 然后将频率估计值转换为粗略相位测量。 基于频率估计产生相位误差; 然后将相位误差转换为精细相位测量。 粗和细相位测量相加以产生累积相位测量。

公开(公告)号：US6078284A

公开(公告)日：2000-06-20

申请号：US723722

申请日：1996-09-30

申请人： Nadav Levanon

发明人： Nadav Levanon

IPC分类号： G01S5/00 ,  G01S5/12 ,  G01S19/25 ,  H04B7/15 ,  H04B7/185 ,  G01S5/01

CPC分类号： G01S5/12 ,  G01S5/0027 ,  H04B7/18547 ,  H04B7/18554

摘要： A system and method for passively determining the position of a user terminal (for example, a mobile wireless telephone) in a low-Earth orbit satellite communications system. The system includes a user terminal, at least two satellites with known positions and known velocities, and a gateway (that is, a terrestrial base station) for communicating with the user terminal through the satellites. The method includes the steps of determining a range difference parameter and a range-rate difference parameter. A range difference parameter represents the difference between (1) the distance between a first one of the satellites and the user terminal and (2) the distance between a second one of the satellites and the user terminal. A range-rate difference parameter represents the difference between (a) a relative radial velocity between a first one of the satellites and the user terminal and (b) a relative radial velocity between a second one of the satellites and the user terminal. The position of the user terminal on the Earth's surface is then determined based on the known positions and known velocities of the satellites, the range difference parameter, and the range-rate difference parameter.

摘要翻译： 一种用于被动地确定低地球轨道卫星通信系统中的用户终端（例如，移动无线电话）的位置的系统和方法。 该系统包括用户终端，具有已知位置和已知速度的至少两个卫星，以及用于通过卫星与用户终端进行通信的网关（即，地面基站）。 该方法包括确定范围差参数和范围差差参数的步骤。 范围差参数表示（1）第一卫星与用户终端之间的距离与（2）第二卫星与用户终端之间的距离之间的差。 距离率差参数表示（a）第一卫星与用户终端之间的相对径向速度和（b）第二卫星与用户终端之间的相对径向速度之间的差。 然后根据卫星的已知位置和已知速度，距离差参数和距离速率差参数来确定用户终端在地球表面上的位置。

公开(公告)号：US5920522A

公开(公告)日：1999-07-06

申请号：US889149

申请日：1997-07-07

申请人： Nadav Levanon

发明人： Nadav Levanon

IPC分类号： G01S5/18 ,  G01S5/28

CPC分类号： G01S5/28 ,  G01S5/18 ,  Y10S367/906

摘要： This invention discloses a method of indicating information related to the trajectory of a projectile traveling at a supersonic velocity, the trajectory intersecting a predefined target plane at a point of incidence and having an angle of incidence with the target plane, the method including sensing a shock wave generated by the projectile at a plurality of fixed locations in a vicinity of the target plane, not all of which locations lie on a single straight line, and providing a plurality of outputs responsive, respectively, to the shock wave sensed at the plurality of locations determining a time-delay for each of the plurality of locations, relative to a predefined, common, reference time, based on the plurality of outputs and determining at least one of the point of incidence, the angle of incidence and the supersonic velocity by at least estimating a solution to a set of time-delay equations, each equation providing an independent representation of only one of the time-delays as a function of the point of incidence, the angle of incidence and the supersonic velocity.A system for indicating information related to the trajectory of a projectile traveling at a supersonic velocity and intersecting a predefined target plane at a point of incidence, the trajectory having an angle of incidence with the target plane is also disclosed.

摘要翻译： 本发明公开了一种指示与超音速行进的弹丸的轨迹相关的信息的方法，该轨迹与入射点处的预定目标平面相交，并且与目标平面具有入射角，该方法包括感测震动 由射弹在目标平面附近的多个固定位置产生的波，并不是所有这些位置都在一条直线上，并且分别响应于在多个位置处感测到的冲击波提供多个输出 基于多个输出，相对于预定义的公共参考时间确定多个位置中的每一个的时间延迟的位置，并且通过以下方式确定入射点，入射角和超音速中的至少一个： 至少估计一组时间延迟方程的解，每个方程提供仅一个时间延迟的独立表示，作为 入射点的功能，入射角和超音速。 还公开了一种用于指示与在超音速下行进并与预定目标平面在入射点相交的弹丸的轨迹相关信息的系统，该轨迹具有与目标平面的入射角。

公开(公告)号：US06697417B2

公开(公告)日：2004-02-24

申请号：US09919626

申请日：2001-07-27

申请人： Ivan Fernandez-Corbaton ,  Nadav Levanon

发明人： Ivan Fernandez-Corbaton ,  Nadav Levanon

IPC分类号： H04B1707

CPC分类号： H04B1/7115 ,  H04B1/7113 ,  H04B1/7117

摘要： A method for estimating the earliest signal arrival in a wireless communication system is presented. The system includes a base station that transmits a plurality of pilot signals and a mobile station configured to receive a plurality of signals corresponding to the pilot signals. The mobile station includes a receiver containing a searcher correlation mechanism and at least one finger correlation mechanism. The mobile station receiver detects the arrival times and energy levels of the received signals and constructs a searcher histogram and a finger histogram associated with each pilot signal. Each of the searcher and finger histograms represents an arrival time distribution of samples corresponding to the received signals. The mobile station receiver processes samples contained within each of the searcher histograms and the finger histograms to generate a plurality of estimated early signal arrivals. The earliest signal arrival is determined from the plurality of estimated early signal arrivals.

摘要翻译： 提出了一种估计无线通信系统中最早信号到达的方法。 该系统包括发送多个导频信号的基站和被配置为接收对应于导频信号的多个信号的移动台。 该移动站包括一个包含搜索器相关机制和至少一个手指相关机构的接收机。 移动站接收机检测接收到的信号的到达时间和能级，并且构建与每个导频信号相关联的搜索器直方图和手指直方图。 搜索器和手指直方图中的每一个表示对应于接收信号的采样的到达时间分布。 移动站接收机处理包含在每个搜索器直方图和手指直方图中的样本以产生多个估计的早期信号到达。 从多个估计的早期信号到达确定最早的信号到达。

公开(公告)号：US06369754B1

公开(公告)日：2002-04-09

申请号：US09536262

申请日：2000-03-27

申请人： Nadav Levanon

发明人： Nadav Levanon

IPC分类号： G01S502

CPC分类号： G01S5/12 ,  G01S1/026 ,  G01S1/045 ,  G01S5/0054 ,  G01S2205/008

摘要： An improved method for determining the location of a user terminal with a high degree of accuracy. By repeating N times the basic active positioning measurement sets, a much better accuracy is reached that will be of value to the user. According to the method of the present invention, the user makes a position call. A position call prompts a gateway to establish a traffic channel on which a positioning message will yield the basic set of measurements: round-trip delay and round-trip Doppler in single-satellite positioning, and the addition of delay-difference and Doppler difference to a second satellite in two-satellite positioning. The accumulated measurements are used to determine position and theoretical error. The call is terminated when an accuracy threshold is reached or a time limit has expired. The user terminal receives a position message or a failure message.

摘要翻译： 一种用于以高精确度确定用户终端的位置的改进方法。 通过重复N次基本的主动定位测量集，达到对用户有价值的更好的精度。 根据本发明的方法，用户进行位置呼叫。 位置呼叫提示网关建立一个定位消息将产生基本测量集的业务信道：单卫星定位中的往返延迟和往返多普勒，以及将延迟差和多普勒差加到 卫星定位的第二颗卫星。 累积测量用于确定位置和理论误差。 当达到精度阈值或时间限制时，呼叫终止。 用户终端接收到位置消息或故障消息。

公开(公告)号：US6137441A

公开(公告)日：2000-10-24

申请号：US150500

申请日：1998-09-09

申请人： Jin Dai ,  Nadav Levanon ,  Bill Ames ,  Ed Victor ,  Jim Determan

发明人： Jin Dai ,  Nadav Levanon ,  Bill Ames ,  Ed Victor ,  Jim Determan

IPC分类号： G01S19/25 ,  G01S5/12 ,  H04B7/185 ,  G01S5/02

CPC分类号： H04B7/1855 ,  G01S5/12 ,  G01S19/00 ,  G01S19/38

摘要： The present invention is a system and method for accurately determining the distance (range) between one or more satellites and a user terminal and the rate of change (range rate) of that distance. When accurately determined according to the present invention, these quantities can be used to determine the location of the user terminal with a high degree of accuracy. When one satellite is available, the present invention determines the range and range rate based on the Doppler frequency shift that a signal experiences between the satellite and the user terminal, the round trip delay a signal experiences during transmission from the satellite to the user terminal and back via a satellite to a gateway, the Doppler frequency shift a signal experiences between the satellite and the gateway, and the timestamps of the measurements. When a second satellite is available, the present invention determines the range and range rate between the second satellite and the user terminal based on the round trip delay, the Doppler frequency shift that a signal experiences between the second satellite and the user terminal, and the difference in arrival times at the user terminal of the signals from the satellites.

摘要翻译： 本发明是一种用于精确地确定一个或多个卫星与用户终端之间的距离（范围）和该距离的变化率（范围速率）的系统和方法。 当根据本发明精确地确定时，可以使用这些量来高精度地确定用户终端的位置。 当一个卫星可用时，本发明基于信号在卫星和用户终端之间经历的多普勒频移，信号从卫星到用户终端的传输期间经历的往返延迟，确定范围和范围速率;以及 通过卫星返回到网关，多普勒频移卫星和网关之间的信号以及测量的时间戳。 当第二卫星可用时，本发明基于往返延迟，信号在第二卫星和用户终端之间经历的多普勒频移以及第二卫星可用的多普勒频移，确定第二卫星与用户终端之间的范围和距离率 来自卫星的信号在用户终端的到达时间的差异。