公开(公告)号：US09591438B2

公开(公告)日：2017-03-07

申请号：US14138412

申请日：2013-12-23

Applicant: NextNav, LLC

Inventor： Arun Raghupathy ,  Ganesh Pattabiraman ,  Subramanian S Meiyappan ,  Hari Sankar

IPC: G01S1/08 ,  H04W4/02 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B7/26 ,  H04W72/00 ,  H04W72/04

CPC classification number: H04B1/7087 ,  G01S1/08 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B1/709 ,  H04B7/2618 ,  H04B2201/7073 ,  H04W4/02 ,  H04W56/005 ,  H04W72/005 ,  H04W72/0446 ,  H04W72/048

Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.

Abstract translation: 描述了用于确定接收机的位置的系统和方法。 定位系统包括发射机网络，其包括广播定位信号的发射机。 该定位系统包括一个远程接收器，用于获取和跟踪定位信号和/或卫星信号。 卫星信号是基于卫星的定位系统的信号。 远程接收机的第一模式使用基于终端的定位，其中远程接收机使用定位信号和/或卫星信号来计算位置。 定位系统包括耦合到远程接收器的服务器。 远程接收机的第二操作模式包括基于网络的定位，其中服务器根据定位信号和/或卫星信号计算远程接收器的位置，其中远程接收器接收并向服务器传送定位信号和/或 卫星信号。

公开(公告)号：US09432078B2

公开(公告)日：2016-08-30

申请号：US14654634

申请日：2013-10-22

Applicant: ZTE Corporation

Inventor： Hui Lei

IPC: H04B1/7073 ,  H04J13/00 ,  H04B1/7083 ,  H04W72/04

CPC classification number: H04B1/70735 ,  H04B1/7083 ,  H04B2201/7073 ,  H04J13/0003 ,  H04J2013/0096 ,  H04W72/0446

Abstract: Provided are a method and device for searching a cell, and the method comprises: timeslot synchronization is performed; a primary scrambling code group is identified and a frame synchronization is performed according to hashed values of code numbers of secondary synchronization codes (SSCs) in any several consecutive timeslots; and a primary scrambling code is obtained in the primary scrambling code group according to the primary scrambling code group, so as to complete cell searching.

Abstract translation: 提供了一种用于搜索小区的方法和装置，并且该方法包括：执行时隙同步; 识别主扰码组，并且根据任何几个连续时隙中的次同步码（SSCs）的码号的散列值来执行帧同步; 并且在根据主扰码组的主扰码组中获得主扰码，以便完成小区搜索。

公开(公告)号：US20160241301A1

公开(公告)日：2016-08-18

申请号：US15041217

申请日：2016-02-11

Applicant: NXP B.V.

Inventor： NENAD PAVLOVIC ,  Vladislav DYACHENKO ,  Tarik SARIC

IPC: H04B1/7073

CPC classification number: H04B1/7073 ,  H03C3/0925 ,  H03C3/0933 ,  H03C3/0941 ,  H03C3/095 ,  H03C3/0958 ,  H03C3/0991 ,  H03L7/1976 ,  H04B2001/6912 ,  H04B2201/7073

Abstract: A phase locked loop is disclosed having a frequency controlled oscillator (42), a feedback path, a time to digital converter (10) and a memory. The frequency controlled oscillator (42) comprises a first control input (135, 136) for varying the frequency of the output (106) of the frequency controlled oscillator (42) so as to track a reference frequency (101) and a second control input (139) for modulating the frequency of the output signal (106) so as to produce a chirp. The feedback path is configured to provide an input signal (107) to the time to digital converter (10), and comprises modulation cancelling module (14) operable to remove the frequency modulation resulting from the second control input (139) from the output signal (106). The memory stores second control input values that each correspond with a desired chirp frequency and which compensate for non-linearity in the response of the frequency controlled oscillator to the second control input (139). The phase locked loop is operable in a chirp mode, in which the second control input (139) is produced by determining a value for the second control input (139) corresponding with a desired chirp frequency based on the stored second control input values in the memory, and in which the phase locked loop is configured to determine the first control input (135, 136) based on the feedback path from which the modulation cancelling module (14) has removed the frequency modulation resulting from the second control input (139).

Abstract translation: 公开了一种具有频率控制振荡器（42），反馈路径，时间到数字转换器（10）和存储器的锁相环。 频率控制振荡器（42）包括用于改变频率控制振荡器（42）的输出（106）的频率的第一控制输入（135,136），以便跟踪参考频率（101）和第二控制输入 （139），用于调制输出信号（106）的频率，以便产生啁啾声。 反馈路径被配置为向数字转换器（10）提供输入信号（107），并且包括调制解除模块（14），其可操作以从输出信号中去除由第二控制输入（139）产生的频率调制 （106）。 存储器存储每个对应于期望啁啾频率并且补偿频率控制振荡器对第二控制输入（139）的响应中的非线性的第二控制输入值。 锁相环可以在啁啾模式下操作，其中通过基于所存储的第二控制输入值确定对应于期望啁啾频率的第二控制输入（139）的值来产生第二控制输入（139） 存储器，并且其中所述锁相环被配置为基于所述调制解除模块（14）从其中移除了由所述第二控制输入（139）产生的频率调制的反馈路径来确定所述第一控制输入（135,136） 。

公开(公告)号：US20150372714A1

公开(公告)日：2015-12-24

申请号：US14837064

申请日：2015-08-27

Applicant: Deere & Company

Inventor： Wei Yu ,  Richard G. Keegan

IPC: H04B1/709 ,  H04B1/7075 ,  H04B1/7087

CPC classification number: H04B1/709 ,  G01S19/24 ,  G01S19/30 ,  H04B1/7075 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/7087 ,  H04B2201/70715 ,  H04B2201/70716 ,  H04B2201/70728 ,  H04B2201/7073 ,  H04L27/2663

Abstract: A data processor selects a set of BOC correlations in accordance with a BOC correlation function for the sampling period if the primary amplitude exceeds or equals the secondary amplitude for the sampling period. The data processor selects a set of QBOC correlations in accordance with a QBOC correlation function for the sampling period if the secondary amplitude exceeds the primary amplitude for the sampling period. The data processor uses either the BOC correlation function or the QBOC correlation function, whichever with greater amplitude, at each sampling period to provide an aggregate correlation function that supports unambiguous code acquisition of the received signal.

Abstract translation: 如果主振幅超过或等于采样周期的次级振幅，则数据处理器根据采样周期的BOC相关函数来选择一组BOC相关。 如果次级振幅超过采样周期的主振幅，则数据处理器根据采样周期的QBOC相关函数来选择一组QBOC相关。 在每个采样周期，数据处理器使用BOC相关函数或QBOC相关函数（以较大振幅为准）来提供支持接收信号的明确代码获取的聚合相关函数。

公开(公告)号：US09197478B2

公开(公告)日：2015-11-24

申请号：US14310775

申请日：2014-06-20

Applicant: DEERE & COMPANY

Inventor： Wei Yu ,  Richard G Keegan

IPC: H03D1/00 ,  H04L27/26

CPC classification number: H04B1/709 ,  G01S19/24 ,  G01S19/30 ,  H04B1/7075 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/7087 ,  H04B2201/70715 ,  H04B2201/70716 ,  H04B2201/70728 ,  H04B2201/7073 ,  H04L27/2663

Abstract: A data processor selects a set of BOC correlations in accordance with a BOC correlation function for the sampling period if the primary amplitude exceeds or equals the secondary amplitude for the sampling period. An electronic data processor determines whether the receiver is operating in a steady-state mode by evaluating the detected primary amplitude. The data processor selects and/or processes a set of BOC correlations for the sampling period to track a carrier of the received composite signal if the receiver is operating in the steady-state mode. In one embodiment, the data processor forms a first code error using the selected BOC correlations with a first chip spacing to drive the code tracking.

Abstract translation: 如果主振幅超过或等于采样周期的次级振幅，则数据处理器根据采样周期的BOC相关函数来选择一组BOC相关。 电子数据处理器通过评估检测到的主振幅来确定接收器是否处于稳态模式。 数据处理器在采样周期中选择和/或处理一组BOC相关，以便在接收机工作在稳态模式时跟踪所接收的复合信号的载波。 在一个实施例中，数据处理器使用所选择的BOC相关性与第一码片间隔形成第一码错误以驱动码跟踪。

公开(公告)号：US20140292580A1

公开(公告)日：2014-10-02

申请号：US14138412

申请日：2013-12-23

Applicant: NextNav, LLC

Inventor： Arun Raghupathy ,  Ganesh Pattabiraman ,  Subramanian S. Meiyappan ,  Hari Sankar

IPC: G01S5/10

CPC classification number: H04B1/7087 ,  G01S1/08 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B1/709 ,  H04B7/2618 ,  H04B2201/7073 ,  H04W4/02 ,  H04W56/005 ,  H04W72/005 ,  H04W72/0446 ,  H04W72/048

Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.

公开(公告)号：US08643540B2

公开(公告)日：2014-02-04

申请号：US13412508

申请日：2012-03-05

Applicant: Ganesh Pattabiraman ,  Subramanian Meiyappan ,  Arun Raghupathy ,  Hari Sankar

Inventor： Ganesh Pattabiraman ,  Subramanian Meiyappan ,  Arun Raghupathy ,  Hari Sankar

IPC: G01S19/46

CPC classification number: H04B1/7087 ,  G01S1/08 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B1/709 ,  H04B7/2618 ,  H04B2201/7073 ,  H04W4/02 ,  H04W56/005 ,  H04W72/005 ,  H04W72/0446 ,  H04W72/048

Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.

公开(公告)号：US20130063301A1

公开(公告)日：2013-03-14

申请号：US13412508

申请日：2012-03-05

Applicant: Ganesh PATTABIRAMAN ,  Subramanian MEIYAPPAN ,  Arun RAGHUPATHY ,  Hari SANKAR

Inventor： Ganesh PATTABIRAMAN ,  Subramanian MEIYAPPAN ,  Arun RAGHUPATHY ,  Hari SANKAR

IPC: G01S19/46

CPC classification number: H04B1/7087 ,  G01S1/08 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B1/709 ,  H04B7/2618 ,  H04B2201/7073 ,  H04W4/02 ,  H04W56/005 ,  H04W72/005 ,  H04W72/0446 ,  H04W72/048

Abstract: Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.

Abstract translation: 描述了用于确定接收机的位置的系统和方法。 定位系统包括发射机网络，其包括广播定位信号的发射机。 该定位系统包括一个远程接收器，用于获取和跟踪定位信号和/或卫星信号。 卫星信号是基于卫星的定位系统的信号。 远程接收机的第一模式使用基于终端的定位，其中远程接收机使用定位信号和/或卫星信号来计算位置。 定位系统包括耦合到远程接收器的服务器。 远程接收机的第二操作模式包括基于网络的定位，其中服务器根据定位信号和/或卫星信号计算远程接收器的位置，其中远程接收器接收并向服务器传送定位信号和/或 卫星信号。

公开(公告)号：US08385390B2

公开(公告)日：2013-02-26

申请号：US12419460

申请日：2009-04-07

Applicant: Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Songping Wu

IPC: H04B1/00

CPC classification number: H04W56/001 ,  H04B1/7073 ,  H04B1/70735 ,  H04B2201/7073 ,  H04J13/0014 ,  H04J13/10 ,  H04L5/0016 ,  H04L27/2613 ,  H04L27/262 ,  H04L27/2656 ,  H04L27/2662 ,  H04W56/00

Abstract: A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.

Abstract translation: 从通过无线网络发送的数据分组中提取数据的系统和方法包括：接收具有前同步码部分和有效载荷部分的数据分组。 前导码部分与第一已知扩展序列交叉相关，以产生第一定时信号，并且前同步码部分与第二已知扩展信号相互相关，以产生帧定时信号。 在第一定时信号中检测到脉冲，并且基于第一定时信号中检测到的脉冲设置第一定时参数。 在帧定时信号中检测到脉冲，并且基于帧定时信号中检测到的脉冲设置帧定时参数。 根据第一定时参数和帧定时参数从接收到的有效载荷部分提取数据。

公开(公告)号：US20240283458A1

公开(公告)日：2024-08-22

申请号：US18648493

申请日：2024-04-29

Applicant: MEDIATEK INC.

Inventor： Chien-Kai Kao ,  Yi-Hsien Cho

IPC: H03L7/08 ,  H03L7/085 ,  H04B1/7073 ,  H04L7/00 ,  H04L7/033 ,  H04L27/227

CPC classification number: H03L7/0807 ,  H03L7/085 ,  H04B1/7073 ,  H04L7/0025 ,  H04L7/0331 ,  H04L27/2271 ,  H04B2201/7073

Abstract: The present invention provides a circuitry including a PLL and a CDR circuit, wherein the CDR circuit includes a phase detector, a loop filter, a SSC demodulator, a control code generator and a phase interpolator. The PLL is configured to generate a clock signal with SSC modulation and a SSC direction signal. The phase detector is configured to compare phases of an input signal and an output clock signal to generate a detection result, wherein the input signal is with SSC modulation. The loop filter is configured to filter the detection result to generate a filtered signal. The SSC demodulator is configured to receive the SSC direction signal to generate a control signal. The control code generator is configured to generate a control code according to the filtered signal and the control signal to control the phase interpolator to use the clock signal to generate the output clock signal.