公开(公告)号：US20120139784A1

公开(公告)日：2012-06-07

申请号：US13369227

申请日：2012-02-08

Applicant: Javad Ashjaee ,  Lev B. Rapoport ,  Dmitry Kinkulkin ,  Vladimir Yefriemov

Inventor： Javad Ashjaee ,  Lev B. Rapoport ,  Dmitry Kinkulkin ,  Vladimir Yefriemov

IPC: G01S19/48 ,  G01S3/02

CPC classification number: G01S19/44 ,  G01S19/14 ,  G01S19/54

Abstract: A rover processor determines position of a rover based upon the interaction between multiple antennas located at the rover and multiple antennas located at a base. The rover antennas may include a rover master antenna having a phase center located at the centroid of the antennas patterns of at least two auxiliary rover antennas. The rover processor may determine the position of the rover master antenna based upon the relative positions of at least two rover antennas (e.g., the rover master antenna and at least one rover auxiliary antenna, or at least two rover auxiliary antennas) with respect to at least two antennas of a base transceiver.

Abstract translation: 流动站处理器基于位于流动站处的多个天线与位于基地的多个天线之间的交互来确定流动站的位置。 漫游器天线可以包括具有位于至少两个辅助漫游器天线的天线图案的质心的相位中心的漫游器主天线。 流动站处理器可以基于至少两个漫游者天线（例如，漫游器主天线和至少一个漫游器辅助天线或至少两个漫游器辅助天线）相对于在...的相对位置来确定漫游器主天线的位置 基站收发器的至少两个天线。

公开(公告)号：US08022868B2

公开(公告)日：2011-09-20

申请号：US12347218

申请日：2008-12-31

Applicant: Sergey Yudanov ,  Vyacheslav Varyukhin ,  Nikolay Shurygin ,  Stanislav Sila-Novitskiy ,  Javad Ashjaee

Inventor： Sergey Yudanov ,  Vyacheslav Varyukhin ,  Nikolay Shurygin ,  Stanislav Sila-Novitskiy ,  Javad Ashjaee

IPC: G01S19/23

CPC classification number: G01S19/235

Abstract: Dynamic inter-channel bias calibration of a navigational receiver is provided. A reference signal is propagated through front end circuitry of the receiver. A delay caused by the propagation of the reference signal through the front end circuitry is measured. The inter-channel bias of the navigational receiver is reduced using the measured delay associated with the front end circuitry of the receiver.

Abstract translation: 提供导航接收机的动态信道间偏置校准。 参考信号通过接收器的前端电路传播。 测量由参考信号通过前端电路传播引起的延迟。 使用与接收机的前端电路相关联的测量延迟来减少导航接收机的信道间偏置。

公开(公告)号：US06731701B2

公开(公告)日：2004-05-04

申请号：US09939976

申请日：2001-08-27

Applicant: Michael V. Vorobiev ,  Javad Ashjaee

Inventor： Michael V. Vorobiev ,  Javad Ashjaee

IPC: H04L2706

CPC classification number: G01S19/24 ,  G01S19/27 ,  H04B2201/70715

Abstract: Prediction methods for navigation message symbols of satellite systems, such as GPS (Global Positioning System) and GLONASS (Global Orbiting Navigation System), that use information repetition in navigation data messages are disclosed. The methods enable one to eliminate the impact of symbol modulation for a received signal on the threshold performance of any navigation receiver, thereby permitting its operation in severe environments when the carrier-to-noise ratio C/N0 of “weak” satellite signals falls to levels below C/N0=20 dB*Hz.

Abstract translation: 公开了在导航数据消息中使用信息重复的诸如GPS（全球定位系统）和GLONASS（全球轨道导航系统）的卫星系统的导航消息符号的预测方法。 这些方法使得能够消除接收信号的符号调制对任何导航接收机的阈值性能的影响，从而当“弱”卫星信号的载波噪声比C / N0降到 低于C / N0 = 20 dB * Hz。

公开(公告)号：US06594912B2

公开(公告)日：2003-07-22

申请号：US09839468

申请日：2001-04-20

Applicant: Javad Ashjaee

Inventor： Javad Ashjaee

IPC: G01C906

CPC classification number: G01C15/06 ,  G01C9/06 ,  G01C15/10 ,  G01C2009/068

Abstract: Disclosed are electronic plumb indicators for monopoles, survey poles, global positioning antennas and the like. A exemplary plumb indicator comprises a substrate, a plumb bob suspended by a thread (e.g., wire, cable, string, etc.) and disposed over a first surface of the substrate, and a probe. The substrate has an array of conductive pads disposed over its first surface, preferably in a regular pattern. The probe has a first body portion held by the plumb bob but allowed to move freely in the vertical direction, and a conductive tip disposed between the plumb bob and the first surface of the substrate. The probe tip makes contact with the first surface of the substrate, and contacts one or more pads in normal operation. The pads may be scanned electronically to determine the location of the probe tip and plumb bob with respect to the substrate.

公开(公告)号：US5953367A

公开(公告)日：1999-09-14

申请号：US512822

申请日：1995-08-09

Applicant: Mark Zhodzicshsky ,  Victor Veitsel ,  Stanislov Sila-Novatisky ,  Javad Ashjaee ,  Lionel Garin

Inventor： Mark Zhodzicshsky ,  Victor Veitsel ,  Stanislov Sila-Novatisky ,  Javad Ashjaee ,  Lionel Garin

IPC: G01S1/00 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/7117 ,  H04B15/06 ,  H04K1/00 ,  H04L27/30

CPC classification number: H04B1/7085 ,  G01S19/22 ,  G01S19/29 ,  G01S19/30 ,  G01S19/37 ,  H04B1/709 ,  H04B1/7117

Abstract: A receiver of a radio frequency signal having a pseudo-random noise (PRN) code, and techniques of processing such a signal that are especially adapted for ranging applications. A signal corresponding to the PRN code is locally generated and used for decoding the received signal in a manner to reduce ranging errors that can result when multipath (delayed) versions of the radio frequency signal are also present. A significant application of the receiver and signal processing techniques of the present invention is in a Global Positioning System (GPS), wherein a number of such signals from several satellites are simultaneously received and processed in order to obtain information of the position, movement, or the like, of the receiver. A delay locked loop (DLL) correlator, provided in each of the receiver's multiple processing channels, locks onto a line of sight signal from one of the satellites with the effect of any multipath signal(s) being significantly reduced.

公开(公告)号：US5769370A

公开(公告)日：1998-06-23

申请号：US647472

申请日：1996-05-08

Applicant: Javad Ashjaee

Inventor： Javad Ashjaee

IPC: F16M11/08 ,  F16M11/14 ,  F16M11/16 ,  F16M11/32 ,  G01C15/00 ,  G01S5/14 ,  G01S19/10 ,  G01S19/21 ,  G01S19/46 ,  H01Q1/12 ,  H01Q1/18

CPC classification number: H01Q1/18 ,  F16M11/14 ,  F16M11/16 ,  F16M11/2014 ,  F16M11/2092 ,  F16M11/32 ,  G01C15/00 ,  H01Q1/1235 ,  H01Q1/125 ,  G01S19/35

Abstract: A knocked-down portable geodetic surveying station in kit form is disclosed which utilizes a GPS antenna attached to the top portion of a surveyor's stake, or other type monopole. By positioning the bottom portion of the monopole directly upon a desired ground location, and adjusting the angular position of the monopole so that it is precisely vertical, the GPS antenna may be quickly and accurately positioned level and directly above the desired ground location. The GPS antenna and monopole are designed to be used in conjunction with a newly designed geodetic surveying tripod which can be quickly and conveniently set up to support the monopole in its vertical position directly above the desired ground location. The tripod of the present invention includes a tripod head which comprises a base platform, a first housing slidably mounted on the platform to permit the first housing to move along a first directional path, and a second housing slidably mounted within the first housing to permit the second housing to move along a second directional path, generally orthogonal to the first directional path. Mounted pivotally within the second housing is a gimbal which includes a central cavity for receiving the shaft of the monopole. The gimbal allows the angular position of the monopole and GPS antenna to be adjusted independently of the angular position tripod platform.

Abstract translation: 公开了一种具有套件形式的被击倒的便携式测地测量站，其使用附接到测量员桩的顶部的GPS天线或其他类型的单极子。 通过将单极子的底部直接定位在所需的地面位置上，并且调整单极子的角度位置以使得它是精确垂直的，则GPS天线可以被快速且准确地定位在期望的地面位置的正上方。 GPS天线和单极子被设计为与新设计的大地测量三脚架结合使用，其可以快速方便地设置，以将垂直位置的垂直位置支撑在期望的地面位置的正上方。 本发明的三脚架包括三脚架头，其包括基座平台，可滑动地安装在平台上以允许第一壳体沿着第一方向路径移动的第一壳体和可滑动地安装在第一壳体内的第二壳体， 第二壳体沿着大致垂直于第一定向路径的第二定向路径移动。 枢转地安装在第二壳体内的是万向架，其包括用于容纳单极轴的中心腔。 万向节允许独立于角位置三脚架平台调节单极和GPS天线的角位置。

公开(公告)号：US4928106A

公开(公告)日：1990-05-22

申请号：US219353

申请日：1988-07-14

Applicant: Javad Ashjaee ,  Roger J. Helkey ,  Robert G. Lorenz ,  Robert A. Sutherland

Inventor： Javad Ashjaee ,  Roger J. Helkey ,  Robert G. Lorenz ,  Robert A. Sutherland

IPC: G01S19/32 ,  G01S5/14 ,  G01S19/37 ,  G01S19/43

CPC classification number: G01S19/43 ,  G01S19/32 ,  G01S19/37

Abstract: A global positioning system (GPS) receiver having a common radio frequency section and a separate digital signal processing channel for each of a plurality of satellite signals which are simultaneously being received and processed by the receiver in order to calculate the position, velocity or other desired parameters of the receiver. The radio frequency section receives and processes both of the standard satellite signals on different frequency L1 and L2 carriers in order to provide the multi-channel digital section signals from which the relative phase of the carriers from each of the plurality of satellites may be determined. Particular mutually coherent local oscillator and digital clock frequencies are selected in order to minimize the complexity of the receiver without creating any undesired side effects. A high resolution relative phase measurement is made in each digital section by averaging the number of phase shifting pulses over a period of time that are generated by a phase locked loop that is locked onto an L-band carrier frequency, that average incremental phase being added to a base phase measurement obtained simultaneously in each of the digital processing channels.