公开(公告)号：US20170302329A1

公开(公告)日：2017-10-19

申请号：US15483573

申请日：2017-04-10

申请人： FEDERATED WIRELESS, INC.

发明人： Samuel Jay Macmullan ,  Etty Lee ,  Jeff Winston ,  Rohan Grover ,  Kurt Schaubach

IPC分类号： H04B1/69 ,  H04B1/10

CPC分类号： H04B1/69 ,  H04B1/1027 ,  H04B2001/6912

摘要： An improved technique for detecting the presence or absence of one or more predetermined signals in a shared spectrum. In accordance with the disclosed embodiments, a received RF signal may be down-converted to a baseband signal, which is subsequently processed by a spectrum sensor to detect the presence or absence of a predetermined signal, such as a predetermined radar signal. The spectrum sensor may transform the baseband signal to the frequency domain, for example using a fast Fourier transform, to generate a corresponding set of frequency components. The spectrum sensor multiplies the frequency components of the baseband signal with the frequency response of a matched filter having a set of coefficients corresponding to the predetermined signal. The spectrum sensor may convert the matched-filter output signal to the time domain, for example using an inverse fast Fourier transform, and then may determine a value indicative of the signal power that it compares with a known threshold value. The spectrum sensor may determine the presence or absence of the predetermined signal in the received RF signal based on the result of the comparison, and may use the results of its determination to cause the reconfiguration of a transmitter that may be used to transmit RF signals in the same shared spectrum as the received RF signal.

公开(公告)号：US20170285139A1

公开(公告)日：2017-10-05

申请号：US15509580

申请日：2014-10-03

申请人： Mitsubishi Electric Corporation

发明人： Kazuhide HIGUCHI ,  Nobuhiko ANDO ,  Koji TSUTSUMI ,  Hiroyuki MIZUTANI ,  Morishige HIEDA

IPC分类号： G01S7/35 ,  G01S13/34

CPC分类号： G01S7/35 ,  G01S7/40 ,  G01S7/4008 ,  G01S13/34 ,  G01S13/343 ,  G01S13/345 ,  H03B23/00 ,  H03L7/093 ,  H03L7/18 ,  H03L7/191 ,  H04B2001/6912

摘要： A signal generating circuit includes a control voltage setting unit (CVSU) configured to set a control voltage for a chirp signal using voltage-frequency characteristics indicating characteristics of an output frequency versus voltage; a VCO configured to alter the frequency of its output signal by the control voltage; a quadrature demodulator configured to perform quadrature demodulation of the output signal of the VCO to generate an inphase signal and a quadrature signal orthogonal to each other; and a frequency detector configured to detect the frequency of the output signal of the VCO on the basis of the inphase signal and quadrature signal. The CVSU corrects the control voltage by using the voltage-frequency characteristics derived from relationships between the control voltage and the frequency of the output signal of the VCO. The VCO generates the chirp signal based on the control voltage corrected by the CVSU.

公开(公告)号：US20170181033A1

公开(公告)日：2017-06-22

申请号：US15446939

申请日：2017-03-01

申请人： Beartooth Radio, Inc.

发明人： Jefferson M. Jones ,  Andrew M. Wade ,  Nicholas G. Evans ,  Michael C. Monaghan ,  Justin A. Hogan

IPC分类号： H04W28/06 ,  H04W76/02 ,  H04B17/318 ,  H04L1/00 ,  H04L27/10 ,  H04B1/69 ,  H04W52/24 ,  H04W4/00 ,  H04W64/00

CPC分类号： H04W28/06 ,  H04B1/0003 ,  H04B1/006 ,  H04B1/3883 ,  H04B1/3888 ,  H04B1/48 ,  H04B1/69 ,  H04B17/318 ,  H04B2001/6912 ,  H04L1/0002 ,  H04L27/10 ,  H04M1/72527 ,  H04W4/80 ,  H04W52/245 ,  H04W64/00 ,  H04W76/14 ,  H04W88/04

摘要： Systems and methods are disclosed for extending the communication range of mobile communication devices. A long-range radio device is controlled by a control application on a host smartphone. The long-range radio device provides signal paths for two different radios, one employing a long-range (LoRa) modulation format, and another employing a high data-rate encoding such as FSK. The system provides graceful degradation in data rate as radio link distance increases and received signal strength decreases. In addition to switching between radios, variable compression and buffering are used to adapt usage to supportable data rates. Voice, other audio, video, text, binary, and other data formats are supported, as also a wide range of co-resident host apps. Unidirectional and bidirectional links can be used.

公开(公告)号：US20170170871A1

公开(公告)日：2017-06-15

申请号：US15439412

申请日：2017-02-22

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Aanchal Goyal ,  Aleksandr Y. Aravkin ,  Younghun Kim ,  Tarun Kumar

IPC分类号： H04B3/462 ,  H04L12/26 ,  H04B3/54

CPC分类号： H04B3/462 ,  H04B3/542 ,  H04B2001/6912 ,  H04L43/0847 ,  H04L43/50

摘要： A system and method to produce an electric network from estimated line impedance and physical line length among smart meter devices is provided using communication between the smart meters. The smart meters: (1) synchronize time using GPS pps signals, which provide an accurate time stamp; (2) send/receive an identifiable signal through the same phase of electric networks; (3) identify other smart meters on the same phase lines by listening to the information signal on the same phase lines; and (4) calculate time-of-arrival of an identifiable signal from other smart meters. The time of arrival information is used to calculate the line length, which is then used to calculate impedance of a line and topology of the electric network. The system then constructs an electric network by combining geo-spatial information and tree-like usual connection information.

公开(公告)号：US20170126271A1

公开(公告)日：2017-05-04

申请号：US15342377

申请日：2016-11-03

申请人： Raptor Oil Limited

发明人： Colin MACLEAN ,  Gordon COWIE

IPC分类号： H04B1/69 ,  G08C23/02 ,  H04L25/03

CPC分类号： H04B1/69 ,  G08C23/02 ,  H04B11/00 ,  H04B2001/6912 ,  H04L25/03834 ,  H04L27/103

摘要： Generated chirp pulses are modified so that they have an increased time bandwidth product to compensate for noise and/or attenuation in a communication channel In certain circumstances, the modification alone may be inefficient so a counterbalancing modification may be applied at the receiver.

公开(公告)号：US09628807B2

公开(公告)日：2017-04-18

申请号：US15166826

申请日：2016-05-27

申请人： Digi International Inc.

发明人： Terry Michael Schaffner

IPC分类号： H04N19/156 ,  H04B1/69 ,  H04L27/20 ,  H04L27/26 ,  H04N19/15 ,  H04N19/176

CPC分类号： H04N19/156 ,  H04B1/69 ,  H04B2001/6912 ,  H04L27/206 ,  H04L27/2628 ,  H04N19/15 ,  H04N19/176

摘要： A radio frequency receiver for receiving an interleaved single carrier chirp spread spectrum signal based on a chirp sequence includes: a demodulator configured to receive, demodulate, and digitize a modulated radio frequency (RF) signal to form a digital baseband signal; and a signal decoder configured to: despread the digital baseband signal by at least: buffering signal data into blocks of L samples; multiplying the blocks of data with a conjugate of the chirp sequence to form a result; and performing a Fast Fourier Transform (FFT) on the result; equalize data from the FFT to form N data values, where N is the number of subchannels; transform the N data values into N demodulation symbols via an N-point inverse Fourier transform; and decode the demodulation symbols to form codec symbols.

公开(公告)号：US09577702B2

公开(公告)日：2017-02-21

申请号：US14849304

申请日：2015-09-09

申请人： Semtech Corporation

发明人： Olivier Bernard Andre Seller

IPC分类号： H04B1/69 ,  H04J3/06

CPC分类号： H04B1/69 ,  H04B2001/6912 ,  H04J3/0608 ,  H04J3/0635 ,  H04J3/0667 ,  H04L7/033

摘要： A system and a method for time synchronization on a wireless network, based on the exchange of Chirp Spread Spectrum information. Time signals are broadcast from a master (40) to a plurality of slave devices (101, 102, 103). The modulation used includes a compensation of offsets in the master's system clock by symbol-wide frequency shifts that is particularly precise, fine and simple to implement. The system and method of the invention are particularly suitable for synchronizing a telecommunication cell network.

摘要翻译： 基于Chirp扩频信息的交换的无线网络上的时间同步的系统和方法。 时间信号从主机（40）广播到多个从设备（101,102,103）。 所使用的调制包括通过符号范围的频移补偿主系统时钟中的偏移，这是特别精确，精细和简单的实现。 本发明的系统和方法特别适用于同步电信小区网络。

公开(公告)号：US20170019188A1

公开(公告)日：2017-01-19

申请号：US15281590

申请日：2016-09-30

申请人： Cisco Technology, Inc.

发明人： Ragnvald BARTH ,  Sverre HUSEBY ,  Johan Ludvig NIELSEN ,  Dan Peder ERIKSEN

IPC分类号： H04B11/00

CPC分类号： H04B11/00 ,  H04B2001/6912 ,  H04L67/141

摘要： In one embodiment, a method includes receiving ultrasound frequency sweeps in a sound receiving device. Each of the plurality of ultrasound frequency sweeps is centered on one of at least two predetermined frequencies. The method also includes converting the ultrasound frequency sweeps into an ultrasound message based on a central frequency of each of the ultrasound frequency sweeps received, and placing the ultrasound message into a receive buffer. Then at least a network address is extracted from the ultrasound message, and the network address is used to establish a communication session over a data network with a telecommunications device.

摘要翻译： 在一个实施例中，一种方法包括在声音接收装置中接收超声波频率扫描。 多个超声频率扫描中的每一个以至少两个预定频率中的一个为中心。 该方法还包括基于所接收的每个超声波扫描的中心频率将超声波扫描转换成超声波消息，并将超声波消息放入接收缓冲器。 然后，从超声波消息中提取至少一个网络地址，并且网络地址用于通过具有电信设备的数据网络建立通信会话。

公开(公告)号：US20160277546A1

公开(公告)日：2016-09-22

申请号：US15069098

申请日：2016-03-14

申请人： Infineon Technologies AG

发明人： Christian UNHOLD

IPC分类号： H04L29/06 ,  H04B1/69

CPC分类号： H04B1/69 ,  H03L7/00 ,  H03L7/1976 ,  H04B2001/6912

摘要： A method for generating a digital frequency ramp signal including a sequence of frequency ramps is disclosed herein. In accordance with one embodiment of the present invention the method comprises loading a first data word of a data record from a memory. The data record includes information associated with a first frequency ramp, wherein the first data word of the data record includes a header. The method further includes the evaluation of the header to determine whether, or not, the data record includes one or more additional data words and to determine, which information is included in the additional data word(s). Dependent on the evaluation of the header, the additional data word(s) of the data record are loaded from the memory. In accordance with the information stored in the first data word and, if loaded, the additional data word(s) ramp parameters and/or configuration parameters are updated. The method includes, moreover, generating digital ramp signal values in accordance with the updated ramp parameters and synchronous to a clock signal.

摘要翻译： 本文公开了一种用于产生包括频率斜坡序列的数字频率斜坡信号的方法。 根据本发明的一个实施例，该方法包括从存储器加载数据记录的第一数据字。 数据记录包括与第一频率斜坡相关联的信息，其中数据记录的第一数据字包括报头。 该方法还包括标题的评估，以确定数据记录是否包括一个或多个附加数据字，并确定附加数据字中包含哪些信息。 根据标题的评估，从存储器加载数据记录的附加数据字。 根据存储在第一数据字中的信息，并且如果加载，则更新附加数据字斜坡参数和/或配置参数。 此外，该方法还包括根据更新的斜坡参数产生与时钟信号同步的数字斜坡信号值。

公开(公告)号：US09396155B2

公开(公告)日：2016-07-19

申请号：US14600016

申请日：2015-01-20

申请人： ALI Corporation

发明人： Kuo-Kai Lin ,  Wei-Chun Kao ,  Ching-Chung Cheng

IPC分类号： H04B1/00 ,  G06F13/42 ,  H04B17/00 ,  G06F13/40 ,  H04B1/69

CPC分类号： G06F13/4282 ,  G06F13/4072 ,  H04B17/00 ,  H04B2001/6912

摘要： An envelope detection device for detecting a transmission signal of a high speed serial communication includes: an operation circuit, for receiving the transmission signal and generating a set of operated outputs according to the transmission signal and at least one reference signal; a reference signal generating circuit coupled to the operation circuit, for providing the reference signal to the operation circuit, wherein the reference signal generating circuit is operable to provide the reference signal with different voltage levels; and a comparing circuit coupled to the operation circuit, for comparing the set of calculated outputs to generate a comparison result. The envelope detection device detects a transmission state and a disconnect state of the high speed serial communication according to the comparison result generated based on the reference signals at different voltage levels.

摘要翻译： 用于检测高速串行通信的发送信号的包络检测装置包括：运算电路，用于接收发送信号，并根据发送信号和至少一个参考信号产生一组操作的输出; 参考信号发生电路，耦合到所述操作电路，用于将所述参考信号提供给所述操作电路，其中所述参考信号发生电路可操作以向所述参考信号提供不同的电压电平; 以及耦合到所述操作电路的比较电路，用于比较所述一组计算的输出以产生比较结果。 包络检测装置根据基于不同电压电平的基准信号生成的比较结果来检测高速串行通信的发送状态和断开状态。