公开(公告)号：US20180145723A1

公开(公告)日：2018-05-24

申请号：US15872628

申请日：2018-01-16

申请人： Airbus Defence and Space GmbH

发明人： Francis SOUALLE ,  Mathieu CATTENOZ

IPC分类号： H04B1/7113 ,  G01S19/21 ,  G01S19/35

CPC分类号： H04B1/7113 ,  G01S19/21 ,  G01S19/22 ,  G01S19/35 ,  H04B1/7097 ,  H04B2001/70706 ,  H04B2201/70715

摘要： Noise distribution shaping for signals, particularly for the application in receivers for CDMA signals. An embodiment provides a method for noise distribution shaping for signals comprising the acts of generating a blanking control signal by comparing a received signal comprising transitions with at least one blanking threshold, determining transitions of the received signal and zones around the determined transitions, and generating a transitions control signal comprising the determined transitions and zones, adapting the at least one blanking threshold or the received signal according to an offset value depending on the amplitude of the received signal and on the transitions control signal, and modifying the noise distribution of the received signal by applying blanking of the received signal under control of the blanking control signal.

公开(公告)号：US09869770B2

公开(公告)日：2018-01-16

申请号：US14568520

申请日：2014-12-12

申请人： CSR Technology Inc.

发明人： Mangesh Chansarkar ,  Sundar Raman ,  Charles P. Norman ,  Paul A. Underbrink ,  Henry D. Falk ,  James Brown ,  Robert Harvey ,  Peter Michali ,  William Higgins ,  Gensheng Zhang ,  Qingwen Zhang

IPC分类号： G01S19/13 ,  G01S19/37 ,  H04B1/707 ,  G01S19/24 ,  G01S19/34 ,  G01S19/00

CPC分类号： G01S19/13 ,  G01S19/24 ,  G01S19/34 ,  G01S19/37 ,  H04B1/707 ,  H04B2201/70715

摘要： Control and feature systems for processing signals from a satellite positioning system include an expert system receiver manager; a joint detection, carrier centring and bit sync acquisition subsystem; peak detection; a multi-dimensional measurement interpolation subsystem; a system for mode switching between a navigational signal; and power control module for receiver.

公开(公告)号：US09722661B2

公开(公告)日：2017-08-01

申请号：US14798142

申请日：2015-07-13

申请人： Nathan Hays

发明人： Nathan Hays

IPC分类号： H04B1/709 ,  H04B1/707 ,  H04L1/00

CPC分类号： H04B1/709 ,  H04B1/707 ,  H04B2201/70702 ,  H04B2201/70715 ,  H04L1/0071

摘要： A receiver includes a plurality of de-spreading correlators that are programmed to only correlate a specific portion of the full spreading code according to an interleave factor. Each correlator may be associated with a different symbol. The received signal may be received at all correlators and is multiplied by a code generated by a code generator according to the symbol associated with the correlator. While each correlator may be despreading the received signal at all times, an enable signal is used to determine when information for an associated cell should be accumulated for each correlator.

公开(公告)号：US09407318B2

公开(公告)日：2016-08-02

申请号：US14632590

申请日：2015-02-26

申请人： Texas Instruments Incorporated

发明人： Jawaharlal Tangudu ,  Arun Raghupathy

IPC分类号： H04B1/00 ,  H04B1/7075 ,  G01S19/21

CPC分类号： G01S19/21 ,  H04B1/70755 ,  H04B2201/70715

摘要： A receiver (100) is provided for signals of different signal strengths and modulated with respective pseudorandom noise (PN) codes. The receiver (100) includes a correlator circuit (120) operable to correlate the signals with a selectable locally-issued PN code having a Doppler and a code lag to produce a peak, the correlator circuit (120) being subject to cross correlation with a distinct PN code carried by least one of the signals that can produce cross correlation; and a cross correlation circuit (370, 400) operable to generate a variable comparison value related to the cross correlation as a function of values representing a Doppler difference and a code lag difference between the locally-issued PN code and the distinct PN code, and to use the variable comparison value to reject the peak as invalid from cross correlation or to pass the peak as a valid received peak.

摘要翻译： 为不同信号强度的信号提供接收机（100），并用各自的伪随机噪声（PN）码进行调制。 接收器（100）包括相关器电路（120），其可操作以将信号与具有多普勒和码滞后的可选择本地发出的PN码相关以产生峰值，所述相关器电路（120）与 不同PN码携带的信号中至少有一个会产生互相关; 以及互相关电路（370,400），其可操作以根据表示本地发出的PN码和不同PN码之间的多普勒差和码滞差的值产生与互相关的可变比较值，以及 使用可变比较值将峰值从互相关中排除为无效，或将峰值作为有效接收峰值传递。

公开(公告)号：US09356650B2

公开(公告)日：2016-05-31

申请号：US14561407

申请日：2014-12-05

申请人： Texas Instruments Incorporated

发明人： Sunil Chomal ,  Karthik Ramasubramanian ,  Jawaharlal Tangudu ,  Hemanth Mullur

IPC分类号： H04B1/709 ,  H04B1/7075

CPC分类号： H04B1/709 ,  H04B1/7075 ,  H04B2201/70715

摘要： An integrated circuit for facilitating spread spectrum reception of data having a data bit period includes an hypothesis search circuit (120, 210, 220) operable to correlate a pseudorandom code with a signal input based on a received signal to produce correlation results, and a processor circuit (320) operable to coherently integrate the correlation results over plural sample windows (PreD1, PreD2) staggered relative to each other in the coherent integration interval and to non-coherently combine the coherently integrated results corresponding to the plural sample windows (PreD1, PreD2) to produce a received signal output, whereby enhancing performance. Other circuits, receivers and processes are also disclosed.

公开(公告)号：US20160127165A1

公开(公告)日：2016-05-05

申请号：US14963251

申请日：2015-12-09

申请人： Kamilo Feher

发明人： Kamilo Feher

IPC分类号： H04L27/26 ,  H04B7/04 ,  H04B1/69 ,  H04M7/00 ,  H04B1/10 ,  H04W4/02

CPC分类号： H04L27/2602 ,  A61B5/0015 ,  A61B5/0022 ,  A61B5/01 ,  A61B5/024 ,  A61B5/14532 ,  G06F19/00 ,  G16H10/60 ,  G16H15/00 ,  H04B1/1036 ,  H04B1/69 ,  H04B1/707 ,  H04B1/709 ,  H04B7/04 ,  H04B7/18504 ,  H04B7/2628 ,  H04B2201/70715 ,  H04B2201/70716 ,  H04J11/00 ,  H04L1/0003 ,  H04L5/0007 ,  H04L5/1453 ,  H04L27/2017 ,  H04L27/2071 ,  H04L27/2627 ,  H04L27/2649 ,  H04M7/006 ,  H04W4/023 ,  H04W4/025 ,  H04W4/90 ,  H04W12/06 ,  H04W64/00 ,  H04W88/02 ,  H04W88/06 ,  Y02A90/26

摘要： Communication methods for receiving and demodulating in mobile devices signals from multiple locations and for providing baseband position finder signal. Providing in a first cross-correlator and filter cross-correlated in-phase and quadrature-phase filtered baseband signals from a digital input signal and in a second cross-correlator spread spectrum signals from a voice input signal. Providing Orthogonal Frequency Division Multiplex (OFDM) signal from a video input signal. Combining baseband position finder signal with one or more of cross-correlated in-phase and quadrature-phase filtered baseband signals, or cross-correlated in-phase and quadrature-phase spread spectrum baseband signals, or OFDM baseband signal, into a combined baseband signal and modulating and transmitting combined signal. Touch screen control signal for control of mobile devices.

摘要翻译： 用于在移动设备中接收和解调来自多个位置的信号并用于提供基带位置取景器信号的通信方法。 提供第一交叉相关器并且从数字输入信号和来自语音输入信号的第二交叉相关器扩频信号中滤除交相关的同相和正交相位滤波的基带信号。 从视频输入信号提供正交频分复用（OFDM）信号。 将基带位置取景器信号与交相关的同相和正交相位滤波的基带信号或相互相关的同相和正交相位扩频基带信号或OFDM基带信号中的一个或多个组合成组合的基带信号 并调制和传输组合信号。 触摸屏控制信号，用于控制移动设备。

公开(公告)号：US09332429B2

公开(公告)日：2016-05-03

申请号：US14456649

申请日：2014-08-11

申请人： Odyssey Wireless, Inc.

发明人： Peter D. Karabinis

IPC分类号： H04B1/00 ,  H04W12/04 ,  H04B1/69 ,  H04B1/707 ,  H04B1/7097 ,  H04K1/00 ,  H04K3/00 ,  H04L1/00 ,  H04L23/02 ,  H04L25/03 ,  H04W12/06 ,  H04W12/08 ,  H04W36/18 ,  H04W48/02 ,  H04W88/08 ,  H04L5/00

CPC分类号： H04W12/04 ,  H04B1/69 ,  H04B1/707 ,  H04B1/7097 ,  H04B2201/70715 ,  H04K1/00 ,  H04K3/25 ,  H04K3/827 ,  H04K2203/18 ,  H04L1/0043 ,  H04L1/009 ,  H04L1/0091 ,  H04L5/0007 ,  H04L23/02 ,  H04L25/03834 ,  H04L25/03866 ,  H04L25/03987 ,  H04W12/06 ,  H04W12/08 ,  H04W36/18 ,  H04W48/02 ,  H04W84/045 ,  H04W88/08

摘要： A spectral content of a baseband waveform is varied and a measure of the baseband waveform whose spectral content has been varied is used by a transmitter in order to convey information. According to embodiments of inventive concepts, a set of frequencies that is used to provide spectral content to the baseband waveform is varied. In some embodiments, the spectral content comprises non-contiguous first and second frequency intervals wherein a third frequency interval that is between the first and second frequency intervals remains substantially devoid of providing spectral content in order to reduce or avoid interference. In other embodiments, the spectral content that is varied comprises a bandwidth that is varied. The inventive concepts are relevant to 4G LTE carrier aggregation systems/methods and/or other aspects of 4G LTE. Various transmitter/receiver embodiments are disclosed including direct synthesis transmitter/receiver embodiments.

摘要翻译： 改变基带波形的频谱内容，并且由发射机使用其频谱内容已经变化的基带波形的测量以便传达信息。 根据本发明的实施例，用于向基带波形提供频谱内容的一组频率是变化的。 在一些实施例中，频谱内容包括不连续的第一和第二频率间隔，其中在第一和第二频率间隔之间的第三频率间隔基本上不提供频谱内容以便减少或避免干扰。 在其他实施例中，变化的频谱内容包括变化的带宽。 本发明的概念与4G LTE载波聚合系统/方法和/或4G LTE的其它方面相关。 公开了包括直接合成发射机/接收机实施例的各种发射机/接收机实施例。

公开(公告)号：US09304184B1

公开(公告)日：2016-04-05

申请号：US13774961

申请日：2013-02-22

申请人： ARGON ST, INC.

发明人： Alexandr Draganov ,  Franklin M. Haas, Jr. ,  Marc A. Harlacher

IPC分类号： G01S3/02 ,  G01S5/02

CPC分类号： G01S5/0273 ,  G01S19/22 ,  G01S19/47 ,  H04B1/711 ,  H04B2201/70715

摘要： A method for increasing accuracy of geolocation based on timing measurements of RF signals. The method includes: (a) receiving at a user one or more RF signals transmitted over time, (b) correlating the received signals with a plurality of replica waveforms, (c) creating a first set of estimates of the time or arrivals of the signals at the user, (d) using the first set of estimates to create a plurality of models, wherein each model assumes that some of the measurements are affected by multipath or interference, (e) testing the models to estimate the likelihood of timing measurements for each model, and (f) determining the set of LOS measurements as one associated with a model having the largest likelihood.

摘要翻译： 基于RF信号的定时测量提高地理定位精度的方法。 该方法包括：（a）在用户处接收一段时间内发射的RF信号，（b）使接收的信号与多个复制波形相关，（c）创建第一组估计的时间或到达时间 信号，（d）使用第一组估计来创建多个模型，其中每个模型假设某些测量受到多路径或干扰的影响，（e）测试模型以估计定时测量的可能性 对于每个模型，以及（f）将LOS测量集合确定为与具有最大似然性的模型相关联的一组。

公开(公告)号：US09287921B2

公开(公告)日：2016-03-15

申请号：US14457497

申请日：2014-08-12

申请人： Samsung Electronics Co., Ltd.

发明人： Mohamed Youssef ,  Bruce McCullough ,  Steven Gronemeyer

IPC分类号： H04B1/00 ,  H04B1/7073 ,  G01S19/13 ,  G01S19/24 ,  H04B1/7075

CPC分类号： H04B1/7073 ,  G01S19/13 ,  G01S19/243 ,  H04B1/70755 ,  H04B2201/70715

摘要： A method for soft frame synchronization in a navigational receiver is provided. A distance between bits of a sync pattern received by the navigational receiver and a known sync pattern is computed. A probability of detection value for the received sync pattern based on the distance is assigned. A confidence level for the received sync pattern using the probability of detection value is computed. The confidence level is compared with a confidence threshold. If the confidence level is greater than or equal to the confidence threshold, the confidence level of the received sync pattern is updated to generate a credibility of the sync pattern. The credibility of the received sync pattern is compared with a predetermined credibility value and, if the credibility of the received sync pattern is greater than or equal to the predetermined credibility value, synchronization of the navigational receiver is performed using the received sync pattern.

摘要翻译： 提供了一种在导航接收机中进行软帧同步的方法。 计算由导航接收机接收的同步模式的位之间的距离和已知的同步模式。 分配基于距离的接收到的同步图案的检测值的概率。 计算使用检测值概率的接收到的同步模式的置信度。 将置信水平与置信度阈值进行比较。 如果置信水平大于或等于置信阈值，则更新所接收的同步模式的置信水平以产生同步模式的可信度。 将接收到的同步码型的可信度与预定的可信度值进行比较，并且如果所接收的同步码型的可信度大于或等于预定的可信度值，则使用所接收的同步码型执行导航接收机的同步。

公开(公告)号：US09236903B2

公开(公告)日：2016-01-12

申请号：US14234924

申请日：2012-07-12

申请人： Philip Mattos

发明人： Philip Mattos

IPC分类号： H04B1/709 ,  H04B1/711 ,  H04B1/7103

CPC分类号： H04B1/711 ,  H04B1/7103 ,  H04B2201/70715 ,  H04B2201/709718

摘要： A method for detecting multi-path interference in a spread-spectrum signal. A variation of a first signal and a variation of a second signal is compared. The variation of the first signal corresponds to a correlation of the spread-spectrum signal and a spreading code having a first offset. The variation of the second signal corresponds to a correlation of the spread-spectrum signal and the spreading code having a second offset. Multi-path interference is detected in dependence on the comparison.

摘要翻译： 一种用于检测扩频信号中的多径干扰的方法。 比较第一信号的变化和第二信号的变化。 第一信号的变化对应于扩频信号和具有第一偏移的扩展码的相关。 第二信号的变化对应于扩频信号和具有第二偏移的扩展码的相关。 根据比较检测多路径干扰。