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.

公开(公告)号：US11705936B2

公开(公告)日：2023-07-18

申请号：US17446583

申请日：2021-08-31

Applicant: NextNav, LLC

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

IPC: G01S1/08 ,  G01S5/10 ,  H04B1/7087 ,  G01S19/11 ,  H04W72/30 ,  H04W72/51 ,  G01S19/46 ,  G01S19/24 ,  G01S19/42 ,  H04B7/26 ,  H04W72/0446 ,  H04B1/709 ,  H04W56/00

CPC classification number: H04B1/7087 ,  G01S1/08 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B1/709 ,  H04B7/2618 ,  H04W72/0446 ,  H04W72/30 ,  H04W72/51 ,  H04B2201/7073 ,  H04W56/005

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：US20190044572A1

公开(公告)日：2019-02-07

申请号：US16073283

申请日：2016-04-19

Applicant: Mitsubishi Electric Corporation

Inventor： Katsuyuki MOTOYOSHI

IPC: H04B1/7073

CPC classification number: H04B1/7073 ,  G01S19/01 ,  H04B2001/70706 ,  H04B2201/7073 ,  H04W72/0453

Abstract: A spread-spectrum-signal reception apparatus includes a controller to obtain a phase comparison value that is a phase of a spread code at a time at which initialization of a phase of the spread code is performed and which corresponds to a timing of a top of a frame of a received signal, and to output an initialization instruction including the phase comparison value when having determined that a current time is within a range of a time window; and a signal processor to demodulate the received signal in accordance with the spread code, to perform a frame synchronizing process on the demodulated signal to detect a frame timing, and to perform the initialization at a timing determined in accordance with a result of comparison between the phase comparison value included in the initialization instruction and a phase of the spread code at the frame timing.

公开(公告)号：US20170338855A1

公开(公告)日：2017-11-23

申请号：US15661073

申请日：2017-07-27

Applicant: NextNav, LLC

Inventor： ARUN RAGHUPATHY ,  GANESH PATTABIRAMAN ,  SUBRAMANIAN S. MEIYAPPAN

IPC: H04B1/7087 ,  H04B1/709 ,  G01S19/11 ,  G01S19/46 ,  G01S19/42 ,  H04W72/04 ,  G01S19/24 ,  H04W56/00

CPC classification number: H04B1/7087 ,  G01S1/08 ,  G01S5/10 ,  G01S19/11 ,  G01S19/24 ,  G01S19/42 ,  G01S19/46 ,  H04B1/709 ,  H04B7/2618 ,  H04B2201/7073 ,  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：US20160261307A1

公开(公告)日：2016-09-08

申请号：US15028647

申请日：2014-10-10

Applicant: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES

Inventor： Frederic HAMEAU ,  Gilles MASSON ,  Laurent OUVRY

IPC: H04B1/7183 ,  H04B1/7075 ,  H04B1/7115

CPC classification number: H04B1/7183 ,  H04B1/70758 ,  H04B1/7115 ,  H04B1/7163 ,  H04B2201/70707 ,  H04B2201/7073 ,  H04B2201/70979 ,  H04B2201/7163

Abstract: A UWB impulse receiver including an RF stage followed by a baseband processing stage. The baseband processing stage includes a Rake filter including a plurality of time fingers, each finger including an integrator of the baseband signal during an acquisition window, a control module, and a detection module estimating the received symbols from the integration results. During a synchronization phase, the control module drives respective positions of the acquisition windows associated with the different fingers, to scan at a reception interval, the RF stage only operating, in a course of the synchronization phase, during the plurality of acquisition windows.

Abstract translation: UWB脉冲接收机包括RF级，接着是基带处理级。 基带处理级包括包括多个时针的耙式滤波器，每个手指在采集窗口期间包括基带信号的积分器，控制模块以及从积分结果估计接收符号的检测模块。 在同步阶段期间，控制模块驱动与不同手指相关联的采集窗口的相应位置，以在接收间隔扫描，RF阶段仅在同步阶段的过程中在多个采集窗口期间操作。

公开(公告)号：US09408024B2

公开(公告)日：2016-08-02

申请号：US14067911

申请日：2013-10-30

Applicant: NextNav, LLC

Inventor： Arun Raghupathy ,  Ganesh Pattabiraman ,  Subramanian S Meiyappan

IPC: G01S19/46 ,  H04W4/02 ,  G01S19/11 ,  G01S5/10 ,  G01S1/08 ,  G01S19/24 ,  G01S19/42 ,  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：US09313754B2

公开(公告)日：2016-04-12

申请号：US13751388

申请日：2013-01-28

Applicant: Marvell World Trade Ltd.

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

IPC: H04B1/00 ,  H04W56/00 ,  H04B1/7073 ,  H04L27/26 ,  H04J13/00 ,  H04J13/10 ,  H04L5/00

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.

公开(公告)号：US09300353B1

公开(公告)日：2016-03-29

申请号：US14683455

申请日：2015-04-10

Applicant: NXP B.V.

Inventor： Andries Hekstra ,  Stefan Drude ,  Frank Leong ,  Arie Koppelaar

IPC: H04B1/00 ,  H04B1/7073 ,  H04B1/709 ,  H04L29/06

CPC classification number: H04B1/70735 ,  H04B1/709 ,  H04B2201/7073 ,  H04J13/00 ,  H04L1/0083 ,  H04L1/08

Abstract: Various exemplary embodiments relate to a device for performing a method of communication transmission. The device may include a memory; a processor configured to: determine a spreading code with low sidelobe levels in its autocorrelation sequence to be used; create a Start of Frame Delimiter (SOFD) for a packet including the spreading code and a cyclic prefix, wherein the cyclic prefix is a portion of the spreading code; and transmit the packet with the SOFD.

Abstract translation: 各种示例性实施例涉及用于执行通信传输方法的设备。 该设备可以包括存储器; 处理器，其被配置为：在其要使用的自相关序列中确定具有低旁瓣电平的扩展码; 为包括扩展码和循环前缀的分组创建起始帧定界符（SOFD），其中循环前缀是扩展码的一部分; 并用SOFD发送数据包。

公开(公告)号：US09107153B1

公开(公告)日：2015-08-11

申请号：US13776538

申请日：2013-02-25

Applicant: Marvell International Ltd.

Inventor： Ming Lin ,  Songping Wu ,  Quan Zhou

IPC: H04J3/06 ,  H04W56/00 ,  H04B7/26

CPC classification number: H04W56/00 ,  H04B1/7073 ,  H04B1/7087 ,  H04B7/2643 ,  H04B2201/7073

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes receiving a signal via a wireless channel, performing code synchronization by at least using a peak counter to count peak correlations based on the signal and a known preamble, performing frequency synchronization based on the signal, and using, based on a successful completion of the code synchronization, at least a result of the frequency synchronization to demodulate data from the signal. The technique includes starting the frequency synchronization during the code synchronization when an output value of the peak counter satisfies a predetermined criterion.

Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括经由无线信道接收信号，至少使用峰值计数器来执行代码同步，以基于该信号和已知的前导码对峰值相关性进行计数，基于该信号执行频率同步，并且基于成功 完成代码同步，至少是频率同步的结果来解调来自信号的数据。 该技术包括当峰值计数器的输出值满足预定标准时，在代码同步期间启动频率同步。