公开(公告)号：WO00014568A1

公开(公告)日：2000-03-16

申请号：PCT/US1999/020281

申请日：1999-09-03

IPC: G01S1/00 ,  G01S19/23 ,  G01S19/24 ,  G01S19/25 ,  G01S19/29 ,  G01S19/36 ,  G01S19/48 ,  G01S5/14

CPC classification number: H04B1/7077 ,  G01S19/235 ,  G01S19/24 ,  G01S19/25 ,  G01S19/254 ,  G01S19/256 ,  G01S19/29 ,  G01S19/36 ,  H04B2201/70715

Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment comprises a method for performing position location using a set of signals transmitted from a set of satellites including the steps of storing coarse search data, performing a coarse search on said coarse search data for each satellite from said set of satellites, receiving fine search data, performing a set of fine searches on said fine search data, each fine search being performed on a different time segment of said fine search data, and reporting results.

Abstract translation: 本发明是一种用于在无线通信系统中执行位置定位的新颖且改进的方法和装置。 一个实施例包括使用从一组卫星发送的一组信号执行位置定位的方法，包括存储粗略搜索数据的步骤，对来自所述卫星组的每颗卫星的所述粗略搜索数据执行粗略搜索，接收精细搜索 数据，对所述精细搜索数据执行一组精细搜索，对所述精细搜索数据的不同时间段执行每个精细搜索，以及报告结果。

公开(公告)号：WO99066649A1

公开(公告)日：1999-12-23

申请号：PCT/US1999/013552

申请日：1999-06-14

IPC: G01S1/00 ,  H04B1/707 ,  H04B7/216 ,  H04L27/00 ,  H04Q7/38

CPC classification number: H04B7/216 ,  G01S19/29 ,  H04B1/707 ,  H04L2027/0034

Abstract: A system and method for narrowing the range of frequency uncertainty of a Doppler shifted pilot signal in a satellite or other communications system (100) with relative signal source and receiver motion. The satellite communications system (100) includes a user terminal (124, 126) (for example, a mobile wireless telephone), a gateway (120, 122, 112) (terrestrial base station), and at least one satellite (116, 118) with unknown position and unknown relative velocity. The method includes the steps of shifting the pilot signal over a plurality of frequency hypotheses (309), coherently accumulating samples of the pilot signal over a plurality of chips (315), measuring the energy of the accumulated pilot signal samples (318), accumulating the energy measurements over a plurality of chips to produce an energy accumulation value (321), and determining which of the plurality of frequency hypotheses results in the highest energy accumulation value (324).

Abstract translation: 一种用于使具有相对信号源和接收机运动的卫星或其他通信系统（100）中的多普勒频移导频信号的频率不确定度的范围变窄的系统和方法。 卫星通信系统（100）包括用户终端（124,126）（例如，移动无线电话），网关（120,122,112）（地面基站）和至少一个卫星（116,118 ）具有未知位置和未知的相对速度。 该方法包括以下步骤：通过多个频率假设（309）移动导频信号，在多个码片（315）上相干地累加导频信号的样本，测量累积导频信号样本（318）的能量，累积 在多个芯片上的能量测量以产生能量累积值（321），以及确定多个频率假设中的哪一个导致最高的能量累积值（324）。

公开(公告)号：WO1997033382A1

公开(公告)日：1997-09-12

申请号：PCT/US1997003512

申请日：1997-03-07

Applicant: SNAPTRACK, INC. ,  KRASNER, Norman, F.

Inventor： SNAPTRACK, INC.

IPC: H04B07/185

CPC classification number: H04B1/0007 ,  G01S5/0036 ,  G01S5/0045 ,  G01S5/009 ,  G01S19/05 ,  G01S19/06 ,  G01S19/09 ,  G01S19/11 ,  G01S19/235 ,  G01S19/252 ,  G01S19/254 ,  G01S19/256 ,  G01S19/258 ,  G01S19/29 ,  G01S19/34 ,  G01S19/37 ,  G01S19/38 ,  G01S19/46 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/04 ,  H03J7/047 ,  H03J7/06 ,  H03J2200/11 ,  H04B1/00 ,  H04B1/28 ,  H04B1/3805

Abstract: A precision carrier frequency signal for calibrating a local oscillator (56) of a GPS receiver which is used to acquire GPS signals. The precision carrier frequency signal is used to calibrate the local oscillator such that the output of the local oscillator, which is used to acquire GPS signals, is modified by a reference signal generated from the precision carrier frequency signal. The GPS receiver locks (53) to this precision carrier frequency signal and generates the reference signal. In another aspect of the invention, satellite almanac data is transmitted to a remote GPS receiver unit (20) from a base station (12) via a communication link. The remote GPS receiver unit uses this satellite almanac data to determine approximate Doppler data for satellites in view of the remote GPS receiver unit.

Abstract translation: 一种用于校准用于获取GPS信号的GPS接收器的本地振荡器（56）的精确载波频率信号。 精密载波频率信号用于校准本地振荡器，使得用于获取GPS信号的本地振荡器的输出由从精密载波频率信号产生的参考信号修改。 GPS接收机锁定（53）到该精确载波频率信号并产生参考信号。 在本发明的另一方面，卫星历书数据经由通信链路从基站（12）发送到远程GPS接收器单元（20）。 远程GPS接收器单元使用该卫星历书数据来确定远距离GPS接收机单元的卫星的近似多普勒数据。

公开(公告)号：WO1995000861A1

公开(公告)日：1995-01-05

申请号：PCT/US1994006992

申请日：1994-06-16

Applicant: TRIMBLE NAVIGATION LIMITED

Inventor： TRIMBLE NAVIGATION LIMITED ,  McBURNEY, Paul, W.

IPC: G01S05/02

CPC classification number: G01S19/29 ,  G01S19/30 ,  G01S19/46

Abstract: A method and associated algorithm for filtering time-varying location solution coordinates Px,n, Py,n and Pz,n (301) determined by a Satellite Positioning System (SATPS), which operates in a static mode and a dynamic mode (303), to reduce large discontinuities and control the rate at which a changing sequence of measurement errors can induce a change in a sequence of position solutions. The method forms sequences of filtered location coordinates {P &cir& x,n}, {P &cir& y,n} and {P &cir& z,n} (325), smoothed to reduce discontinuities that occur with a changing set of measurement errors. The filtered location coordinates P &cir& x,n, P &cir& y,n and P &cir& z,n (325) are formed as linear combinations of the respective unfiltered location solutions Px,n, Py,n and Pz,n (301) with predicted location coordinates P &cir& x,n-, P &cir& y,n- and P &cir& z,n-. The predicted location coordinates for the present fix time t=tn are formed by projecting ahead the respective preceding filtered location coordinates P &cir& x,n-1, P &cir& y,n-1 and P &cir& z,n-1 for the preceding fix time t=tn-1, using the respective average velocities sqrt(Vx,n + Vx,n-1), sqrt(Vy,n + Vy,n-1) and sqrt(Vz,n + Vz,n-1) in the time interval tn-1 /= tn.

Abstract translation: 一种用于对由卫星定位系统（SATPS）确定的时变位置解坐标Px，n，Py，n和Pz，n（301）进行滤波的方法和相关算法，其以静态模式和动态模式操作（303） ，以减少大的不连续性并控制变化的测量误差序列可以引起位置解决方案序列变化的速率。 该方法形成滤波位置坐标{P＆cir＆x，n}，{P＆cir＆y，n}和{P＆cir＆z，n}（325）的序列，以平滑以减少随更改的测量误差集而发生的不连续性。 滤波后的位置坐标P＆cir＆x，n，P＆cir＆y，n和P＆cir＆z，n（325）被形成为各自的未滤波位置解Px，n，Py，n和Pz，n（301）与 预测位置坐标P＆cir＆x，n-，P＆cir＆y，n-和P＆cir＆z，n-。 当前固定时间t = tn的预测位置坐标是通过在先前固定的前一个滤波位置坐标P＆cir＆x，n-1，P＆cir＆y，n-1和P＆cir＆ 时间t = tn-1，使用相应的平均速度sqrt（Vx，n + Vx，n-1），sqrt（Vy，n + Vy，n-1）和sqrt（Vz，n + Vz，n-1） 在时间间隔tn-1 / = tn。

公开(公告)号：WO1993005407A1

公开(公告)日：1993-03-18

申请号：PCT/GB1991001555

申请日：1991-09-12

Applicant: MATRA MARCONI SPACE UK LTD ,  AUSPACE LIMITED ,  DEMPSTER, Andrew, Graham ,  BRYANT, Roderick, Charles ,  DOUGAN, Stanley, Laverty ,  TAGARIS, Harry

Inventor： MATRA MARCONI SPACE UK LTD ,  AUSPACE LIMITED

IPC: G01S05/14

CPC classification number: G01S19/42 ,  G01S19/09 ,  G01S19/29 ,  G01S19/43

Abstract: A GPS receiver for use with the NAVSTAR global, satellite-based radio navigation and time transfer system wherein transmission from each of a plurality of satellites includes C/A code signals comprising a code and data modulated carrier, said receiver comprising means for receiving C/A code signals transmitted from at least four satellites and means to process the signals including an open loop estimator of signal parameters for phase-coherent estimation of a plurality of signal parameters including code delay, carrier frequency, carrier phase, carrier phase acceleration, data value and data delay.

公开(公告)号：WO1987001540A1

公开(公告)日：1987-03-12

申请号：PCT/US1986001765

申请日：1986-08-25

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  JANC, Robert, Vincent ,  JASPER, Steven, Charles

IPC: H04B15/00

CPC classification number: G01S19/30 ,  G01S19/29

Abstract: A digital receiver (100) for GPS C/A-code signals. The GPS receiver (100) of the present invention provides reception and tracking a plurality of satellites simultaneously, using four separate receiver channels. The GPS receiver (100) of the present invention includes an analog front-end (104) for selecting and frequency translating the received GPS signal. The GPS receiver (100) further includes a highspeed digital signal processor (110) for recovering the despread data of the GPS signal. The baseband signal is further processed by a general purpose digital signal processor (112) for signal search, tracking, and data recovery operations, and a microprocessor (114) provides overall receiver control, and interface with the operator of the GPS receiver (100).

Abstract translation: 一种用于GPS C / A码信号的数字接收机（100）。 本发明的GPS接收机（100）使用四个独立的接收机信道同时提供对多个卫星的接收和跟踪。 本发明的GPS接收机（100）包括用于选择和频率转换接收到的GPS信号的模拟前端（104）。 GPS接收机（100）还包括用于恢复GPS信号的解扩数据的高速数字信号处理器（110）。 基带信号由用于信号搜索，跟踪和数据恢复操作的通用数字信号处理器（112）进一步处理，并且微处理器（114）提供总体接收器控制，并且与GPS接收器（100）的操作者接口， 。

公开(公告)号：WO2018048578A1

公开(公告)日：2018-03-15

申请号：PCT/US2017/046699

申请日：2017-08-14

Applicant: QUALCOMM INCORPORATED

Inventor： NIESEN, Urs ,  GARIN, Lionel Jacques ,  JOSE, Jubin

IPC: G01S19/43

CPC classification number: G01S19/43 ,  G01S19/29 ,  G01S19/30

Abstract: An example of a method of determining a position of a device includes: receiving, with a receiver of the device, a signal from a reference emitter; obtaining a code phase measurement of the signal; obtaining a carrier phase measurement of the signal; calculating an intermediate quantity that is a function of the code phase measurement and the carrier phase measurement; calculating a carrier phase smoothed estimate of a code phase of the signal based, at least in part, on a robust aggregation of the intermediate quantity; and determining the position of the device based, at least in part, on the carrier phase smoothed estimate of the code phase.

Abstract translation: 确定设备的位置的方法的示例包括：利用设备的接收器接收来自参考发射器的信号; 获得信号的码相位测量值; 获得信号的载波相位测量值; 计算作为码相位测量和载波相位测量的函数的中间量; 至少部分地基于所述中间量的稳健聚集来计算所述信号的码相的平滑估计的载波相位; 以及至少部分地基于代码相位的载波相位平滑估计来确定设备的位置。

公开(公告)号：WO2017065998A1

公开(公告)日：2017-04-20

申请号：PCT/US2016/054654

申请日：2016-09-30

Applicant: DEERE & COMPANY

Inventor： YU, Wei ,  KEEGAN, Richard, G. ,  HATCH, Ronald, R.

IPC: G01S19/01 ,  G01S19/13 ,  G01S19/30

CPC classification number: G01S19/30 ,  G01S19/24 ,  G01S19/29

Abstract: A multi-band satellite navigation receiver (11) for carrier and code tracking using a fixed point sigma rho filter (42) with improved stability is described. The receiver (11) simplifies and speeds up the data processing in the filter (42) to adaptively accommodate common information from aggregate bands and obtain the accurate position of the receiver (11) in real time. The filter (42) may utilize a standard deviation function and a cross correlation function while determining adaptive scale factors to ensure that the filter (42) is stable and reliable.

Abstract translation: 描述了使用具有改进的稳定性的定点西格马罗滤波器（42）进行载波和码跟踪的多频带卫星导航接收器（11）。 接收机（11）简化并加速了滤波器（42）中的数据处理，以自适应地适应来自聚合频带的公共信息并实时获得接收机（11）的准确位置。 滤波器（42）可以利用标准偏差函数和互相关函数，同时确定自适应比例因子以确保滤波器（42）稳定可靠。

公开(公告)号：WO2016098588A1

公开(公告)日：2016-06-23

申请号：PCT/JP2015/083833

申请日：2015-11-25

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： KIM, Kyeong Jin ,  OSECHAS, Okuary ,  PARSONS, Kieran ,  SAHINOGLU, Zafer

IPC: G01S19/39 ,  G01S19/26

CPC classification number: G01S19/43 ,  G01S19/14 ,  G01S19/22 ,  G01S19/26 ,  G01S19/29 ,  G01S19/426

Abstract: A navigation system for navigating a vehicle includes a position module for determining a current position of the vehicle by tracking at least one satellite signal, and an estimation module for identifying, upon an interruption of the tracking the satellite signal, an object blocking the satellite signal. The estimation module is also configured for determining, using a property of the object, a next position of the vehicle at a distance from the current position at which the navigation system reacquires the satellite signal, and the navigation system also includes an acquisition module for determining a phase of the satellite signal at the next position and for initializing, upon reacquiring the satellite signal, the tracking of the satellite signal using the phase.

Abstract translation: 用于导航车辆的导航系统包括：位置模块，用于通过跟踪至少一个卫星信号来确定车辆的当前位置;以及估计模块，用于在跟踪卫星信号的中断时识别阻挡卫星信号的对象 。 所述估计模块还被配置为用于使用所述对象的属性来确定与所述导航系统重新获取所述卫星信号的当前位置相距一定距离处的所述车辆的下一个位置，并且所述导航系统还包括用于确定 在下一个位置处的卫星信号的相位，并且在重新获取卫星信号时初始化用于使用该相位的卫星信号的跟踪。

公开(公告)号：WO2016098587A1

公开(公告)日：2016-06-23

申请号：PCT/JP2015/083832

申请日：2015-11-25

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： KIM, Kyeong Jin ,  OSECHAS, Okuary ,  KNIAZEV, Andrei ,  PARSONS, Kieran ,  SAHINOGLU, Zafer

IPC: G01S19/50 ,  G01S19/25

CPC classification number: G01S19/48 ,  G01C21/20 ,  G01S19/14 ,  G01S19/26 ,  G01S19/29 ,  G01S19/426 ,  G01S19/50 ,  G01S19/51

Abstract: A navigation system includes a first navigation module for determining a first position and a second navigation module for determining a second position. The first and the second navigation modules are mechanically connected, such that the first position is dependent on the second position. Also, the first and the second navigation modules are communicatively connected to exchange information including at least one of the first and the second positions. At an instant of time during an operation of the navigation system, the first navigation module receives the second position from the second navigation module and determines the first position based on the second position.

Abstract translation: 导航系统包括用于确定第一位置的第一导航模块和用于确定第二位置的第二导航模块。 第一和第二导航模块机械连接，使得第一位置取决于第二位置。 此外，第一和第二导航模块通信地连接以交换包括第一和第二位置中的至少一个的信息。 在导航系统操作期间的时刻，第一导航模块从第二导航模块接收第二位置，并且基于第二位置确定第一位置。