公开(公告)号：US08089408B2

公开(公告)日：2012-01-03

申请号：US12609883

申请日：2009-10-30

申请人： Stephen F. Smith ,  James A. Moore

发明人： Stephen F. Smith ,  James A. Moore

IPC分类号： G01S3/02

CPC分类号： G01C21/165 ,  G01C21/206 ,  G01S1/042 ,  G01S1/24 ,  G01S5/0263 ,  G01S5/10 ,  G01S19/10 ,  G01S19/18 ,  G01S19/47

摘要： Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.

摘要翻译： 为导航系统描述了方法和装置。 一种过程包括提供分布在整个所需覆盖区域内的多个发射机; 将所述多个发射机锁定到公共定时参考; 从所述多个发射机中的每一个发送信号。 一种装置包括分布在期望覆盖区域内的多个发射机; 其中所述多个发射机中的每一个包括分组发生器; 并且其中所述多个发射器被锁定到公共定时参考。

公开(公告)号：US07876267B2

公开(公告)日：2011-01-25

申请号：US12609902

申请日：2009-10-30

申请人： Stephen F. Smith ,  James A. Moore

发明人： Stephen F. Smith ,  James A. Moore

IPC分类号： G01S3/02

CPC分类号： G01C21/165 ,  G01C21/206 ,  G01S1/042 ,  G01S1/24 ,  G01S5/0263 ,  G01S5/10 ,  G01S19/10 ,  G01S19/18 ,  G01S19/47

摘要： Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.

摘要翻译： 为导航系统描述了方法和装置。 一种过程包括提供分布在整个所需覆盖区域内的多个发射机; 将所述多个发射机锁定到公共定时参考; 从所述多个发射机中的每一个发送信号。 一种装置包括分布在期望覆盖区域内的多个发射机; 其中所述多个发射机中的每一个包括分组发生器; 并且其中所述多个发射器被锁定到公共定时参考。

公开(公告)号：US07626544B2

公开(公告)日：2009-12-01

申请号：US11583374

申请日：2006-10-17

申请人： Stephen F. Smith ,  James A. Moore

发明人： Stephen F. Smith ,  James A. Moore

IPC分类号： G01S1/08

CPC分类号： G01C21/165 ,  G01C21/206 ,  G01S1/042 ,  G01S1/24 ,  G01S5/0263 ,  G01S5/10 ,  G01S19/10 ,  G01S19/18 ,  G01S19/47

摘要： Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.

摘要翻译： 为导航系统描述了方法和装置。 一种过程包括提供分布在整个所需覆盖区域内的多个发射机; 将所述多个发射机锁定到公共定时参考; 从所述多个发射机中的每一个发送信号。 一种装置包括分布在期望覆盖区域内的多个发射机; 其中所述多个发射机中的每一个包括分组发生器; 并且其中所述多个发射器被锁定到公共定时参考。

公开(公告)号：US07587017B2

公开(公告)日：2009-09-08

申请号：US11803712

申请日：2007-05-14

申请人： Stephen F. Smith ,  James A. Moore

发明人： Stephen F. Smith ,  James A. Moore

IPC分类号： H04L7/00 ,  H03D3/24

CPC分类号： H04L27/0014 ,  H03D3/248 ,  H04H20/12 ,  H04H20/49 ,  H04H20/67 ,  H04L27/06

摘要： Systems and methods are described for carrier phase synchronization for improved AM and TV broadcast reception. A method includes synchronizing the phase of a carrier frequency of a broadcast signal with the phase of a remote reference frequency. An apparatus includes a receiver to detect the phase of a reference signal; a phase comparator coupled to the reference signal-phase receiver; a voltage controlled oscillator coupled to the phase comparator; and a phase-controlled radio frequency output coupled to the voltage controlled oscillator.

摘要翻译： 描述用于载波相位同步以改进AM和TV广播接收的系统和方法。 一种方法包括使广播信号的载波频率的相位与远程参考频率的相位同步。 一种装置，包括：检测参考信号的相位的接收器; 相位比较器，耦合到参考信号相位接收器; 耦合到相位比较器的压控振荡器; 以及耦合到压控振荡器的相位控制射频输出。

公开(公告)号：US07218696B2

公开(公告)日：2007-05-15

申请号：US10304338

申请日：2002-11-26

申请人： Stephen F. Smith ,  James A. Moore

发明人： Stephen F. Smith ,  James A. Moore

IPC分类号： H04L7/00 ,  H04L25/40

CPC分类号： H03D3/248

摘要： Systems and methods are described for carrier-frequency synchronization for improved AM and TV broadcast reception. A method includes synchronizing a carrier frequency of a broadcast signal with a remote reference frequency. An apparatus includes a reference signal receiver; a phase comparator coupled to the reference signal receiver; a voltage controlled oscillator coupled to the phase comparator; and a radio frequency output coupled to the voltage controlled oscillator.

摘要翻译： 描述了用于载波频率同步以改善AM和TV广播接收的系统和方法。 一种方法包括使广播信号的载波频率与远程参考频率同步。 一种装置包括参考信号接收器; 耦合到参考信号接收器的相位比较器; 耦合到相位比较器的压控振荡器; 以及耦合到压控振荡器的射频输出。

公开(公告)号：USD532820S1

公开(公告)日：2006-11-28

申请号：US29255907

申请日：2006-03-14

申请人： Stephen F. Smith

设计人： Stephen F. Smith

公开(公告)号：US06973145B1

公开(公告)日：2005-12-06

申请号：US09653788

申请日：2000-09-01

申请人： Stephen F. Smith ,  Gary W. Turner

发明人： Stephen F. Smith ,  Gary W. Turner

IPC分类号： H03L7/07 ,  H03L7/087 ,  H03L7/089 ,  H03L7/191 ,  H03L7/23 ,  H04J3/06 ,  H04L7/00 ,  H03D3/24

CPC分类号： H03L7/0891 ,  H03L7/07 ,  H03L7/087 ,  H03L7/191 ,  H03L7/23 ,  H04J3/0685

摘要： Digital-data receiver synchronization is provided with composite phase-frequency detectors, mutually cross-connected comparison feedback or both to provide robust reception of digital data signals. A single master clock may be used to provide frequency signals. Advantages can include fast lock-up time in moderately to severely noisy conditions, greater tolerance to noise and jitter when locked, and improved tolerance to clock asymmetries.

摘要翻译： 数字数据接收机同步提供有复合相位频率检测器，互相交叉比较反馈或两者，以提供数字数据信号的鲁棒接收。 可以使用单个主时钟来提供频率信号。 优点可以包括在中等到严重噪声条件下的快速锁定时间，锁定时更大的噪声容限和抖动，以及改善对时钟不对称性的容限。

公开(公告)号：US06625229B2

公开(公告)日：2003-09-23

申请号：US10082773

申请日：2002-02-25

申请人： William B. Dress, Jr. ,  Stephen F. Smith

发明人： William B. Dress, Jr. ,  Stephen F. Smith

IPC分类号： H04L2704

CPC分类号： H04L25/49 ,  H04B1/71637 ,  H04B1/7172 ,  H04B1/7174 ,  H04B1/719 ,  H04L25/03834

摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission transmitter includes: a clock; a pseudorandom polynomial generator coupled to the clock, the pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to the pseudorandom polynomial generator, the exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both the clock and the exclusive-OR gate; a pulse generator coupled to the programmable delay circuit; and a higher order time derivative filter coupled to the pulse generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

摘要翻译： 公开了用于脉冲传输低功率通信模式的系统和方法。 脉冲传输发射机包括：时钟; 耦合到所述时钟的伪随机多项式发生器，所述伪随机多项式发生器具有多项式负载输入; 耦合到伪随机多项式发生器的异或门，异或门具有串行数据输入; 耦合到时钟和异或门的可编程延迟电路; 耦合到所述可编程延迟电路的脉冲发生器; 以及耦合到脉冲发生器的较高阶导数滤波器。 这些系统和方法显着降低了脉冲传输扩频通信模式的低频发射，从而减少了对现有射频业务和用户的潜在有害干扰，并且同时允许利用特定的脉冲形状传输多个数据位。

公开(公告)号：US06606350B2

公开(公告)日：2003-08-12

申请号：US10082568

申请日：2002-02-25

申请人： William B. Dress, Jr. ,  Stephen F. Smith

发明人： William B. Dress, Jr. ,  Stephen F. Smith

IPC分类号： H04B1702

CPC分类号： H04L25/49 ,  H04B1/71637 ,  H04B1/7172 ,  H04B1/7174 ,  H04B1/719 ,  H04L25/03834

摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a front-end amplification/processing circuit; a synchronization circuit coupled to the front-end amplification/processing circuit; a clock coupled to the synchronization circuit; a trigger signal generator coupled to the clock; and at least one higher-order time derivative pulse generator coupled to the trigger signal generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

摘要翻译： 公开了用于脉冲传输低功率通信模式的系统和方法。 脉冲发射接收机包括：前端放大/处理电路; 耦合到前端放大/处理电路的同步电路; 耦合到同步电路的时钟; 耦合到时钟的触发信号发生器; 以及耦合到触发信号发生器的至少一个高阶时间导数脉冲发生器。 这些系统和方法显着降低了脉冲传输扩频通信模式的低频发射，从而减少了对现有射频业务和用户的潜在有害干扰，并且同时允许利用特定的脉冲形状传输多个数据位。

公开(公告)号：US06603818B1

公开(公告)日：2003-08-05

申请号：US09404009

申请日：1999-09-23

申请人： William B. Dress, Jr. ,  Stephen F. Smith

发明人： William B. Dress, Jr. ,  Stephen F. Smith

IPC分类号： H04L2704

CPC分类号： H04L25/49 ,  H04B1/71637 ,  H04B1/7172 ,  H04B1/7174 ,  H04B1/719 ,  H04L25/03834

摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A method of pulse transmission communications includes: generating a modulated pulse signal waveform; transforming said modulated pulse signal waveform into at least one higher-order derivative waveform; and transmitting said at least one higher-order derivative waveform as an emitted pulse. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.