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公开(公告)号：US08649415B2
公开(公告)日：2014-02-11
申请号：US13535467
申请日：2012-06-28
申请人： Anthony R. Pratt , John I. R. Owen
发明人： Anthony R. Pratt , John I. R. Owen
IPC分类号： H04B1/00
CPC分类号： H04J13/0022 , G01S19/01
摘要： Embodiments of the present invention provide a method to produce a modulation signal comprising combining at least two modulation signals, for example, BOCs or derivatives thereof, having portions (chip or a number of chips) thereof with respective relative phases or states ({++,−−} and {+−,−+}) selected such that the average of a plurality of said portions at least reduces cross spectral terms of the composite complex spectrum of said at least two modulation signals.
摘要翻译： 本发明的实施例提供一种产生调制信号的方法，包括组合至少两个调制信号，例如BOC或其衍生物，其具有相应相对相位或状态的部分（芯片或多个芯片）（{++ ， - }和{+ - ， - +}），使得多个所述部分的平均值至少减少所述至少两个调制信号的复合复谱的交叉光谱项。
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公开(公告)号：US20090279592A1
公开(公告)日：2009-11-12
申请号：US12305401
申请日：2007-06-20
申请人： Anthony R. Pratt , John I.R Owen
发明人： Anthony R. Pratt , John I.R Owen
IPC分类号： H04B1/00
CPC分类号： H04J13/0022 , G01S19/01
摘要： Embodiments of the present invention provide a method to produce a modulation signal comprising combining at least two modulation signals, for example, BOCs or derivatives thereof, having portions (chip or a number of chips) thereof with respective relative phases or states ({++, −} and {+−, −+}) selected such that the average of a plurality of said portions at least reduces cross spectral terms of the composite complex spectrum of said at least two modulation signals.
摘要翻译： 本发明的实施例提供一种产生调制信号的方法，包括组合至少两个调制信号，例如BOC或其衍生物，其具有相应相对相位或状态的部分（芯片或多个芯片）（{++ ， - }和{+ - ， - +}），使得多个所述部分的平均值至少减少所述至少两个调制信号的复合复谱的交叉光谱项。
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公开(公告)号：US20120281736A1
公开(公告)日：2012-11-08
申请号：US13535467
申请日：2012-06-28
申请人： Anthony R. PRATT , John I. R. OWEN
发明人： Anthony R. PRATT , John I. R. OWEN
IPC分类号： H04B1/707
CPC分类号： H04J13/0022 , G01S19/01
摘要： Embodiments of the present invention provide a method to produce a modulation signal comprising combining at least two modulation signals, for example, BOCs or derivatives thereof, having portions (chip or a number of chips) thereof with respective relative phases or states ({++,−−} and {+−,−+}) selected such that the average of a plurality of said portions at least reduces cross spectral terms of the composite complex spectrum of said at least two modulation signals.
摘要翻译： 本发明的实施例提供一种产生调制信号的方法，包括组合至少两个调制信号，例如BOC或其衍生物，其具有相应相对相位或状态的部分（芯片或多个芯片）（{++ ， - }和{+ - ， - +}），使得多个所述部分的平均值至少减少所述至少两个调制信号的复合复谱的交叉光谱项。
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公开(公告)号：US06539305B2
公开(公告)日：2003-03-25
申请号：US10074993
申请日：2002-02-13
申请人： Anthony R. Pratt
发明人： Anthony R. Pratt
IPC分类号： G01S2100
摘要： Positioning apparatus for use in a moving vehicle includes circuitry arranged to process signals received from GPS satellites, and to provide signals in response thereto from which the position of the apparatus can be calculated at a remote station. The apparatus provides, for each satellite in view, carrier frequency estimation signals, samples of the carrier signals and code tracking signals to a data transmission device, which modulates the signals onto a carrier prior to transmission to the remote station. A carrier loop reconstruction device and a location processor in the remote station co-operate to determine the location of the positioning apparatus. A memory device may record signals received over a period of time, from which mission replay may be performed.
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公开(公告)号：US06283052B1
公开(公告)日：2001-09-04
申请号：US09566893
申请日：2000-05-08
申请人： Anthony R. Pratt
发明人： Anthony R. Pratt
IPC分类号： D05C1520
摘要： A tufting machine has a reciprocating needle bar which may be shifted laterally by a drive which includes at least one linear motor. Each linear motor has two major elements which may be coupled together electromagnetically. One of the elements is connected to a fixed portion of the tufting machine and another of the elements is connected to the needle bar. When electrical power is supplied to the motor, the element connected to the needle bar moves relatively to the other thereby moving the needle bar.
摘要翻译： 簇绒机具有可以由包括至少一个线性马达的驱动器横向移动的往复式针杆。 每个线性电机具有两个可以电磁耦合在一起的主要元件。 其中一个元件连接到簇绒机的固定部分，另一个元件连接到针杆。 当向电动机提供电力时，连接到针杆的元件相对于另一个移动，从而移动针杆。
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公开(公告)号：US08995575B2
公开(公告)日：2015-03-31
申请号：US13411477
申请日：2012-03-02
CPC分类号： G01S19/02 , H04L27/2601
摘要： Techniques for processing a navigation signal are disclosed. In one particular embodiment, the techniques may be realized as a method processing a navigation signal, the method comprising the steps of: receiving, using a receiver, the navigation signal, the navigation signal comprising a carrier signal, a data signal and at least one ranging code modulated by at least one stepped subcarrier modulation signal, the at least one stepped subcarrier modulation signal comprising a number, m, of amplitude levels, where m>2, and wherein the amplitude levels have respective magnitudes and durations arranged to influence the power spectrum of the navigation signal is constrained in a predetermined manner, processing the navigation signal to recover the modulated at least one ranging code; and processing the recovered at least one modulated ranging code to recover at least one demodulated ranging code.
摘要翻译： 公开了用于处理导航信号的技术。 在一个特定实施例中，可以将技术实现为处理导航信号的方法，该方法包括以下步骤：使用接收机接收导航信号，导航信号，包括载波信号，数据信号和至少一个 由至少一个阶梯式副载波调制信号调制的测距码，所述至少一个步进副载波调制信号包括振幅电平的数量m，其中m≥2，并且其中振幅电平具有相应的幅度和持续时间以便影响功率 以预定的方式约束导航信号的频谱，处理导航信号以恢复调制的至少一个测距码; 以及处理所述恢复的至少一个调制测距码以恢复至少一个解调的测距码。
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公开(公告)号：US06901265B2
公开(公告)日：2005-05-31
申请号：US10132821
申请日：2002-04-25
申请人： Anthony R Pratt
发明人： Anthony R Pratt
CPC分类号： G01S19/235 , G01S19/29 , G01S2205/008
摘要： In a mobile unit housing a two-way communications subsystem and a satellite positioning system (SPS) receiver subsystem, the communications subsystem includes a training signal generator for generating a training signal mimicing a positioning signal transmitted by a remote SPS transmitter. The training signal is frequency-coupled to a reference frequency source contained within and used by the communications subsystem, which source is, itself, stabilized by means of communication with a remote station, e.g. a base station in a cellular telephone system. In a training sequence, the training signal is activated and coupled into the SPS receiver subsystem, and a replica signal generator for generating a carrier replica signal for position-fixing purposes is controlled so as to bring the carrier replica signal into aliment with the training signal. Information representative of the control setting of the replica signal generator corresponding to such alignment is stored. Subsequently in a searching sequence, the training signal is deactivated and the replica signal generator is set to a setting based on the stored information for acquisition and processing of positioning signals from remote SPS transmitters.
摘要翻译： 在容纳双向通信子系统和卫星定位系统（SPS）接收机子系统的移动单元中，通信子系统包括训练信号发生器，用于产生模拟由远程SPS发射机发送的定位信号的训练信号。 该训练信号被频率耦合到通信子系统中包含并由其使用的参考频率源，该源自身通过与远程站的通信而稳定，例如， 蜂窝电话系统中的基站。 在训练序列中，训练信号被激活并耦合到SPS接收机子系统中，并且控制用于产生用于位置固定目的的载波副本信号的副本信号发生器，以使载波副本信号与训练信号 。 存储代表对应于该对准的复制信号发生器的控制设置的信息。 随后在搜索序列中，训练信号被去激活，并且复制信号发生器被设置为基于存储的用于获取和处理来自远程SPS发射机的定位信号的信息的信息。
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公开(公告)号：US06664921B2
公开(公告)日：2003-12-16
申请号：US09731167
申请日：2000-12-06
申请人： Anthony R. Pratt
发明人： Anthony R. Pratt
IPC分类号： G01S502
摘要： Apparatus for receiving ranging signals (e.g. signals from Global Positioning System satellites) has a receiver coupled to a plurality of spaced antennas. The receiver includes a signal combiner which receives, from a processing circuit, signal components individually representative of a characteristic of the received ranging signals (e.g. signal-to-noise ratio) at a respective antenna and weights the said components to produce a range estimate of improved accuracy in difficult reception conditions. In one embodiment receiver includes a common i.f. channel which filters a combination signal representative of all the incoming signals in order substantially to maintain phase coherence between the incoming signals, yielding improvements in carrier phase measurement and discrimination.
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公开(公告)号：US20120269235A1
公开(公告)日：2012-10-25
申请号：US13411477
申请日：2012-03-02
申请人： Anthony R. Pratt , John I. Owen
发明人： Anthony R. Pratt , John I. Owen
IPC分类号： H04B1/707
CPC分类号： G01S19/02 , H04L27/2601
摘要： The present invention relates to a modulation system in which an m-level, m>2, digital subcarrier is used to modulate a signal.
摘要翻译： 本发明涉及一种调制系统，其中使用m级m≥2的数字子载波来调制信号。
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公开(公告)号：US20110051781A1
公开(公告)日：2011-03-03
申请号：US12815189
申请日：2010-06-14
申请人： Anthony R. Pratt , John I. Owen
发明人： Anthony R. Pratt , John I. Owen
CPC分类号： G01S19/02 , H04L27/2601
摘要： A method of generating a subcarrier modulation signal for modulating a further signal, the method involving multiplexing or selectively combining portions of first and second subcarriers to produce the subcarrier modulation signal.
摘要翻译： 一种生成用于调制另一信号的子载波调制信号的方法，所述方法涉及多路复用或选择性地组合第一和第二子载波的部分以产生副载波调制信号。
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