公开(公告)号：EP1730914A1

公开(公告)日：2006-12-13

申请号：EP05731565.7

申请日：2005-03-29

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： MO, Shaomin, Samuel ,  SIKRI, Divaydeep ,  GELMAN, Alexander, D. ,  HAIMOVICH, Alexander, M.

IPC分类号： H04L25/03 ,  H04L27/26 ,  H04B1/69

CPC分类号： H04L25/03866 ,  H04B1/7163 ,  H04B1/717 ,  H04B1/7176 ,  H04J11/003 ,  H04J13/0022 ,  H04L5/0007 ,  H04L5/0044

摘要： Methods and apparatus for generating and processing wideband signals having reduced discrete power spectral density (PSD) components are disclosed. A wideband signal having reduced discrete PSD components is achieved by generating data symbols responsive to data for transmission, transforming one or more of the data symbols into a frame including one or more orthogonal frequency division multiplexing (OFDM) symbols, selectively inverting the frame responsive to a pseudo-random data sequence, and modulating wideband signal pulses of the wideband signal with the selectively inverted frame.

公开(公告)号：EP3333585A2

公开(公告)日：2018-06-13

申请号：EP17206576.5

申请日：2017-12-12

申请人： Siemens Healthcare GmbH ,  The General Hospital Corporation

发明人： Beck, Thomas ,  Bilgic, Berkin ,  Polak, Daniel ,  Setsompop, Kawin

IPC分类号： G01R33/561

CPC分类号： G01R33/56572 ,  A61B5/055 ,  G01R33/36 ,  G01R33/4818 ,  G01R33/543 ,  G01R33/5602 ,  G01R33/5608 ,  G01R33/5611 ,  G01R33/5613 ,  H04B1/717

摘要： A method comprising controlling a radio-frequency transmitter of a magnetic resonance imaging device to apply an inversion pulse to a sample magnetization. In a multi-shot readout phase, the method further comprises controlling a gradient system of the magnetic resonance imaging device to apply a steady-state gradient echo readout sequence comprising at least one first phase-encoding gradient along a first direction, at least one second phase-encoding gradient along a second direction, and a sequence of readout gradients along a readout direction. The method further comprises, in the multi-shot readout phase: controlling the gradient system to apply first AC gradients along the first direction and at least partly contemporaneously with readout gradients of the sequence of readout gradients and controlling the gradient system to apply second AC gradients along the second direction and at least partly contemporaneously with the readout gradients of the sequence of readout gradients.

公开(公告)号：EP1108318B1

公开(公告)日：2011-07-27

申请号：EP99938968.7

申请日：1999-08-03

申请人： Intersil Americas Inc.

发明人： MCCALLISTER, Ronald, D. ,  BADKE, Bradley, P. ,  COCHRAN, Bruce, A.

IPC分类号： H04L27/36 ,  H04L25/03

CPC分类号： H04L25/03834 ,  H04B1/717 ,  H04B1/719 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2627 ,  H04L27/3411 ,  H04L27/3494 ,  H04L27/363

摘要： A constrained-envelope digital-communications transmitter circuit (22) in which a binary data source (32) provides an input signal stream (34), a phase mapper (44) maps the input signal stream (34) into a quadrature phase-point signal stream (50) having a predetermined number of symbols per unit baud interval (64) and defining a phase point (54) in a phase-point constellation (46), a pulse-spreading filter (76) filters the phase-point signal stream (50) into a filtered signal stream (74), a constrained-envelope generator (106) generates a constrained-bandwidth error signal stream (108) from the filtered signal stream (74), a delay element (138) delays the filtered signal stream (74) into a delayed signal stream (140) synchronized with the constrained-bandwidth error signal stream (108), a complex summing circuit (110) sums the delayed signal stream (140) and the constrained-bandwidth error signal stream (108) into a constrained-envelope signal stream (112), and a substantially linear amplifier (146) amplifies the constrained-envelope signal stream (112) and transmits it as a radio-frequency broadcast signal (26).

公开(公告)号：EP2281349A2

公开(公告)日：2011-02-09

申请号：EP09747374.8

申请日：2009-05-12

申请人： Metropolitan Area Networks, Inc. ,  Chastain, William J.

发明人： CHASTAIN, William, J. ,  GREENWOOD, Douglas

IPC分类号： H04B1/69 ,  H04J13/02 ,  H04B7/216

CPC分类号： H04B1/707 ,  H04B1/717 ,  H04B1/7176

摘要： A system, method and apparatus for wireless communications are provided. In an exemplary embodiment, frequency components present in a short duration modulated complex pulse is used to represent data to be sent. In other embodiments, the complex pulse is created, modulated, then modified to have desirable frequency characteristics. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims

公开(公告)号：EP3304754A1

公开(公告)日：2018-04-11

申请号：EP16802271.3

申请日：2016-05-31

申请人： Transfert Plus Limited Partnership

发明人： NABKI, Frederic ,  DESLANDES, Dominic ,  TAHERZADEH-SANI, Mohammad ,  SOER, Michiel

IPC分类号： H04B1/7163 ,  H04B1/7183 ,  H04L25/00 ,  H04L7/00

CPC分类号： H04B1/717 ,  H04B1/1615 ,  H04B1/7183 ,  H04L7/00 ,  H04L7/033 ,  H04L25/00 ,  H04L25/03834

摘要： Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.

公开(公告)号：EP1108318A4

公开(公告)日：2005-12-21

申请号：EP99938968

申请日：1999-08-03

申请人： INTERSIL INC

发明人： MCCALLISTER RONALD D ,  BADKE BRADLEY P ,  COCHRAN BRUCE A

IPC分类号： H04L27/20 ,  H04L1/00 ,  H04L25/03 ,  H04L27/26 ,  H04L27/34 ,  H04L27/36

CPC分类号： H04L25/03834 ,  H04B1/717 ,  H04B1/719 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2627 ,  H04L27/3411 ,  H04L27/3494 ,  H04L27/363

摘要： A constrained-envelope digital-communications transmitter circuit (22) in which a binary data source (32) provides an input signal stream (34), a phase mapper (44) maps the input signal stream (34) into a quadrature phase-point signal stream (50) having a predetermined number of symbols per unit baud interval (64) and defining a phase point (54) in a phase-point constellation (46), a pulse-spreading filter (76) filters the phase-point signal stream (50) into a filtered signal stream (74), a constrained-envelope generator (106) generates a constrained-bandwidth error signal stream (108) from the filtered signal stream (74), a delay element (138) delays the filtered signal stream (74) into a delayed signal stream (140) synchronized with the constrained-bandwidth error signal stream (108), a complex summing circuit (110) sums the delayed signal stream (140) and the constrained-bandwidth error signal stream (108) into a constrained-envelope signal stream (112), and a substantially linear amplifier (146) amplifies the constrained-envelope signal stream (112) and transmits it as a radio-frequency broadcast signal (26).

公开(公告)号：EP1314288A4

公开(公告)日：2005-04-13

申请号：EP01961874

申请日：2001-08-03

申请人： INTERSIL INC

发明人： MCCALLISTER RONALD D ,  COCHRAN BRUCE A ,  BADKE BRADLEY P

IPC分类号： H04L27/20 ,  H04B1/707 ,  H04J3/00 ,  H04L1/00 ,  H04L25/03 ,  H04L27/26 ,  H04L27/34 ,  H04L27/36 ,  H04L27/04 ,  H04L27/12

CPC分类号： H04L25/03834 ,  H04B1/707 ,  H04B1/717 ,  H04B1/719 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2627 ,  H04L27/3411 ,  H04L27/3494 ,  H04L27/363

摘要： A constrained-envelope digital-communications transmitter circuit (22) includes a binary data source (32) that provides an input stream (34) to a modulator (77, 77'). The modulator (77, 77') includes a pulse-spreading filter (76) that filters a phase-point stream (50) or a composite signal stream (168) into a modulated signal (74). A constrained-envelope generator (106) generates a constrained-bandwidth error signal stream (108) from the modulated signal (74), and a delay element (138) delays the modulated signal (74) into a delayed modulated signal (1240) synchronized with the constrained-bandwidth error signal stream (108). A complex summing circuit (110) sums the delayed modulated signal (140) and the constrained-bandwidth error signal stream (108) into an altered modulated signal (112), and a substantially linear amplifier (146) amplifies the altered modulated signal (112) and transmits it as a radio-frequency broadcast signal (26).

公开(公告)号：EP3304754B1

公开(公告)日：2024-06-05

申请号：EP16802271.3

申请日：2016-05-31

IPC分类号： H04B1/7163 ,  H04B1/7183 ,  H04L25/49 ,  H04L7/00 ,  H04B1/16 ,  H04B1/717 ,  H04L7/033 ,  H04L25/03 ,  H04B1/3827

CPC分类号： H04L7/00 ,  H04B1/1615 ,  H04B1/385 ,  H04L25/4902 ,  H04B1/717 ,  H04L7/033 ,  H04L25/03834 ,  Y02D30/70

公开(公告)号：EP3123200A1

公开(公告)日：2017-02-01

申请号：EP15770035.2

申请日：2015-02-18

申请人： Intel Corporation

发明人： NAEGLE, Nathaniel D. ,  SPRENGER, Mark E. ,  GWIN, Paul J.

IPC分类号： G01S13/06

CPC分类号： G06T19/006 ,  G01S13/0209 ,  G01S13/18 ,  G01S13/48 ,  G01S13/89 ,  G06F3/011 ,  G06T2215/16 ,  H04B1/717

摘要： Embodiments are generally directed to determination of mobile display position and orientation using micropower impulse radar. An embodiment of an apparatus includes a display to present images; radar components to generate radar signal pulses and generate distance data based on received return signals; radar antennae to transmit radar signal pulses and receive return signals; and a processor to process signals and data, the processor to: process return signals to determine a position and orientation of the display with respect to real objects in an environment and determine position of a vantage point of a user, and generate an augmented image including rendering a virtual object and superimposing the virtual object on an image including one or more real objects, rendering of the virtual image being based at least in part on determined position and orientation of the display and determined vantage point of the user.

摘要翻译： 实施例通常涉及使用微功率脉冲雷达来确定移动显示器的位置和方位。 装置的实施例包括用于呈现图像的显示器; 雷达组件产生雷达信号脉冲并基于接收的返回信号产生距离数据; 雷达天线传输雷达信号脉冲并接收返回信号; 以及用于处理信号和数据的处理器，其中所述处理器将：处理由所述雷达天线接收到的返回信号，以确定所述显示器相对于环境中的真实物体的位置和取向，并且确定所述有利位置的位置 并且生成包括渲染虚拟对象并将虚拟对象叠加在包括一个或多个真实对象的图像上的增强图像，所述虚拟图像的呈现至少部分地基于所确定的位置和取向 的显示和确定的设备用户的有利位置。

公开(公告)号：EP2281349A4

公开(公告)日：2013-08-07

申请号：EP09747374

申请日：2009-05-12

申请人： METROPOLITAN AREA NETWORKS INC ,  CHASTAIN WILLIAM J

发明人： CHASTAIN WILLIAM J ,  GREENWOOD DOUGLAS

IPC分类号： H04B1/69 ,  H04B1/717 ,  H04B1/7176 ,  H04B1/719 ,  H04B7/216

CPC分类号： H04B1/707 ,  H04B1/717 ,  H04B1/7176