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公开(公告)号：US5966055A
公开(公告)日：1999-10-12
申请号：US799164
申请日：1997-02-14
CPC分类号： H03C3/0975
摘要： Apparatus for generating the family of PSK (phase shift keyed) modulations, which include BPSK (binary PSK), QPSK (quaternary PSK), MSK (minimum shift keying) and the like. The carrier is generated with the desired digital information already phase-modulated onto it by directly introducing a phase shift or delay onto the error path of a phase-locked loop. causing the phase-locked loop to create the phase modulation. The [proposed scheme differs from common practice approaches, which are usually implemented by linear synthesis (an AM technique); rather, it] invention employs direct nonlinear synthesis (an FM technique). The invention [yields good phase precision with arbitrary spectral shaping under the constraint of constant envelope signaling. It] permits the connection of the output of a simple, inexpensive VCO (voltage controlled oscillator) directly to a system's antenna without the need for intervening circuit elements such as phase splitters, mixers, and the like which is applicable to [. The resulting minimal implementation will lend itself well to] the power, size and cost constraints of a microminiature radio transmitter as might be required, for example, for the up-link of a wrist-phone style communicator.
摘要翻译： 用于产生PSK（相移键控）调制系列的装置，包括BPSK（二进制PSK），QPSK（四进制PSK），MSK（最小移位键控）等。 通过将相移或延迟直接引入到锁相环的误差路径上，通过已经相位调制的期望的数字信息生成载波。 导致锁相环产生相位调制。 [提出的方案不同于通常的实践方法，通常通过线性合成（AM技术）来实现; 相反，本发明采用直接非线性合成（FM技术）。 本发明[在恒定包络信号的约束下，产生具有任意频谱整形的良好的相位精度。 它允许将简单廉价的VCO（压控振荡器）的输出直接连接到系统的天线，而不需要诸如分相器，混频器等的中间电路元件的适用。 所产生的最小实现将很好地适用于可能需要的微型无线电发射机的功率，尺寸和成本限制，例如用于手机式通信器的上行链路。
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公开(公告)号：US5442696A
公开(公告)日：1995-08-15
申请号：US816332
申请日：1991-12-31
CPC分类号： H04L27/30 , H04Q1/4575
摘要： The present invention provides a method and apparatus for detecting control signal information for an element of a communication system. The control signal information is included in one or more segments of a signal communicated over a communication system channel. The invention provides for the application of a plurality of tapers to a segment of a communicated signal; the transformation of a tapered segment; the determination of a similarity score based on a transform of a tapered segment and a model of a control signal; the identification of control signal information based on a similarity score; and the creation of an indicator signal representative of the identified control signal information to the communication system element. The control signal information may comprise a dual-tone multi-frequency signal. The tapers may comprise a discrete prolate spheroidal sequence. A similarity score may be determined based on a ratio of energy distributions. The numerator of the ratio may comprise an energy distribution based on a control signal model, and the denominator of the ratio may comprise an energy distribution based on a difference between a transformed tapered segment and the control signal model.
摘要翻译： 本发明提供了一种用于检测通信系统的元件的控制信号信息的方法和装置。 控制信号信息被包括在通过通信系统信道传送的信号的一个或多个段中。 本发明提供了将多个锥度应用于所传送的信号的段; 锥形部分的转变; 基于锥形段的变换和控制信号的模型确定相似性得分; 基于相似性得分识别控制信号信息; 以及向所述通信系统元件创建表示所识别的控制信号信息的指示符信号。 控制信号信息可以包括双音多频信号。 锥度可以包括离散的长椭球形序列。 可以基于能量分布的比率来确定相似性得分。 该比率的分子可以包括基于控制信号模型的能量分布，并且该比率的分母可以包括基于变换的锥形段和控制信号模型之间的差的能量分布。
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公开(公告)号：US4698769A
公开(公告)日：1987-10-06
申请号：US698095
申请日：1985-02-04
CPC分类号： H04Q1/442
摘要： Supervisory audio tones received from a mobile telephone unit are converted from analog to digital form. The tone is then converted to a complex number by bifurcating the tone path and multiplying one path by a sine function and the other path by a cosine function. The complex numbers are accumulated and the frequencies where significant power exists is found using the discrete Fourier transform. If the power at an assigned frequency exceeds a threshold, the corresponding supervisory audio tone is declared to have been detected.
摘要翻译： 从移动电话单元接收到的监听音频从模拟转换成数字形式。 然后，通过将色调路径分叉并将一个路径乘以正弦函数，并将另一个路径乘以余弦函数，将该音调转换为复数。 利用离散傅立叶变换，求出复数，存在有功功率的频率。 如果分配频率的功率超过阈值，则声明相应的监控音频音被检测到。
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公开(公告)号：US4229823A
公开(公告)日：1980-10-21
申请号：US047021
申请日：1979-06-11
申请人： David J. Thomson , Roland J. Turner
发明人： David J. Thomson , Roland J. Turner
CPC分类号： H04L7/033
摘要： To stabilize the phase of bit rate clock signals recovered from a self-clocking data signal, e.g., a Manchester coded signal, extra signal level transition pulses (58) occurring during intervals of successive bits of the same info bit type are inverted (59) to reinforce the desired phase of the bit-rate frequency component.
摘要翻译： 为了稳定从自定时数据信号（例如曼彻斯特编码信号）恢复的比特率时钟信号的相位，在相同信息比特类型的连续比特的间隔期间发生的额外信号电平转换脉冲（58）被反转（59） 以加强比特率频率分量的期望相位。
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5.发明申请Communicating Over Single- or Multiple- Antenna Channels Having Both Temporal and Spectral Fluctuations 有权在具有时间和频谱波动的单天线或多天线信道上进行通信公开(公告)号：US20120321016A1
公开(公告)日：2012-12-20
申请号：US13597781
申请日：2012-08-29
IPC分类号： H04L27/04
CPC分类号： H04L25/0202 , H04L1/06 , H04L5/0023 , H04L5/0048 , H04L25/03834
摘要： This inventions provides techniques for estimating both temporal and spectral channel fluctuations with the duration of a data symbol. Certain pulse shaping functions are Discrete Prolate Spheroidal Sequences (DPSSs) and are used primarily because of their relatively limited Inter-Symbol Interference (ISI) properties. During reception, these properties allow one or more parameters of a joint time-frequency channel model to be more easily determined. Once the one or more parameters are determined, they can be applied to received symbols to correct the temporal fluctuations, spectral fluctuations, or both of the channel over which a communication took place. The techniques may be adapted for the Multiple-In, Multiple-Out communication situation.
摘要翻译： 本发明提供了用于在数据符号的持续时间内估计时间和频谱信道波动的技术。 某些脉冲整形功能是离散放大球形序列（DPSS），主要是因为它们相对有限的符号间干扰（ISI）属性。 在接收期间，这些属性允许更容易地确定联合时频信道模型的一个或多个参数。 一旦确定了一个或多个参数，就可以将它们应用于所接收的符号，以校正通信所发生的信道的时间波动，频谱波动或两者。 这些技术可以适用于多输入多输出通信情况。
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6.发明授权
公开(公告)号：US06118523A
公开(公告)日：2000-09-12
申请号：US253824
申请日：1999-02-19
CPC分类号： H04B10/2563
摘要： An accurate and simplified method of non-destructively measuring the zero-dispersion wavelength along the length of a single-mode fiber is disclosed. The method includes the steps of measuring the FWM intensity of the optical fiber at a plurality of wavelengths, plotting the measured FWM intensity at each of the plurality of wavelengths to obtain a curve representative of the FWM intensity of each of the plurality of wavelength, and performing a non-linear inversion on the curve to obtain the zero-dispersion wavelength along the length of the fiber.
摘要翻译： 公开了一种对单模光纤长度进行非破坏性测量零色散波长的精确和简化的方法。 该方法包括以下步骤：测量在多个波长处的光纤的FWM强度，绘制在多个波长中的每个波长处测量的FWM强度，以获得表示多个波长中每个波长的FWM强度的曲线，以及 在曲线上进行非线性反演以获得沿着光纤长度的零色散波长。
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公开(公告)号：US4556869A
公开(公告)日：1985-12-03
申请号：US737569
申请日：1985-05-23
申请人： David J. Thomson
发明人： David J. Thomson
CPC分类号： H04L25/4906 , G11B20/10 , G11B20/1419
摘要： A data signal is processed to change its form and spectral content without introducing undesirable frequency and amplitude effects. Multiple data signal states, which determine the essential characteristics of the output signal wave configuration, are utilized in conjunction with clock signals at a rate substantially in excess of twice the largest frequency component of the data signal in order to read from a memory a bit-duration waveform sample set representing the desired output signal wave configuration. Predistortion to compensate for anticipated transmission effects is also included in that configuration. In one embodiment, an input data signal is in an NRZ format and is processed for conversion to the biphase, or Manchester, format by a ROM table look-up function addressed jointly by the input signal states and the clock signals.
摘要翻译： 处理数据信号以改变其形式和频谱含量，而不引入不期望的频率和幅度效应。 确定输出信号波配置的基本特性的多个数据信号状态与时钟信号结合使用，时钟信号的速率基本上超过数据信号的最大频率分量的两倍，以便从存储器读取位数据， 表示期望的输出信号波形配置的持续时间波形采样集。 补偿预期传输效应的预失真也包括在该配置中。 在一个实施例中，输入数据信号为NRZ格式，并通过由输入信号状态和时钟信号联合寻址的ROM表查找功能进行处理以转换为双相或曼彻斯特格式。
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8.发明授权公开(公告)号：US07308232B2
公开(公告)日：2007-12-11
申请号：US10177732
申请日：2002-06-21
申请人： David J. Thomson
发明人： David J. Thomson
IPC分类号： H04B17/00
CPC分类号： H04L25/0202
摘要： A method and apparatus are disclosed for equalizing a channel using improved channel estimates. The present invention assumes that fading will follow a statistical model and obtains an improved channel estimate using one or more basis functions to describe the channel based on known channel statistics. A Karhunen-Loeve expansion can be used for channel estimation to describe the channel. Waveforms are selected that are matched to characteristics of the channel, such as transmission waveforms whose energy is largely restricted to a bandwidth assigned to the channel. Coefficients are estimated for the basis functions using real-time data.
摘要翻译： 公开了一种用于使用改进的信道估计来均衡信道的方法和装置。 本发明假设衰落将遵循统计模型，并且使用一个或多个基本函数获得改进的信道估计，以基于已知信道统计来描述信道。 Karhunen-Loeve扩展可以用于信道估计来描述信道。 选择与通道的特性相匹配的波形，例如其能量主要限于分配给通道的带宽的传输波形。 基于使用实时数据的基函数估计系数。
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9.发明授权Methods and apparatus for location determination based on dispersed radio frequency tags 有权基于分散射频标签的位置确定方法和装置公开(公告)号：US06900762B2
公开(公告)日：2005-05-31
申请号：US10261112
申请日：2002-09-30
申请人： Michael R. Andrews , Tin Kam Ho , Gregory P. Kochanski , Louis J. Lanzerotti , David J. Thomson
发明人： Michael R. Andrews , Tin Kam Ho , Gregory P. Kochanski , Louis J. Lanzerotti , David J. Thomson
CPC分类号： G01S5/0036 , G01S5/02 , G01S13/75
摘要： Systems and techniques for location determination. A plurality of tags emitting radio frequency signals are dispersed throughout a region, such as a building, within which a user's location is to be determined. The radio frequency signals emitted by the tags include information that can be used to identify the location in which the tags axe placed, or simply to distinguish the tags from one another. A portable device receives signals from the tags and provides the signal information to a location server that computes the location of the portable device by comparing the signal information received from the portable device to a map of location venus stored signal information, and identifies the location of the portable device as the location for which the stored signal information best matches the signal information received from the portable device.
摘要翻译： 用于位置确定的系统和技术。 发射射频信号的多个标签分散在诸如建筑物的区域中，在该区域内将确定用户的位置。 由标签发射的射频信号包括可用于识别标签放置位置的信息，或简单地将标签彼此区分开。 便携式设备从标签接收信号，并将信号信息提供给位置服务器，该位置服务器通过将从便携式设备接收的信号信息与定位金星存储的信号信息的映射进行比较来计算便携式设备的位置， 便携式设备作为存储的信号信息与从便携式设备接收的信号信息最佳匹配的位置。
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10.发明授权Process for forming integrated structures using three dimensional printing techniques 有权使用三维印刷技术形成一体化结构的方法公开(公告)号：US06363606B1
公开(公告)日：2002-04-02
申请号：US09174503
申请日：1998-10-16
申请人： David W. Johnson, Jr. , Gregory P. Kochanski , Louis J. Lanzerotti , Cindy M. Pribble , David J. Thomson
发明人： David W. Johnson, Jr. , Gregory P. Kochanski , Louis J. Lanzerotti , Cindy M. Pribble , David J. Thomson
IPC分类号： H01R4300
CPC分类号： B29C41/20 , B22F3/008 , B22F2999/00 , B29C64/165 , B29C2037/80 , B29K2995/0005 , B29K2995/0006 , B33Y10/00 , B33Y70/00 , Y10T29/49004 , Y10T29/49169 , B22F7/06 , B22F3/26
摘要： An improved process for making a structure using three dimensional printing techniques is disclosed. Briefly stated, the method can be summarized by the following steps: A first type of powder material is deposited in a defined area to form a first layer. Next, a binder material is applied to certain regions of the first type of powder to define a portion of the structure to be formed. And finally, a portion of the unbound powder is removed using a technique such as vacuuming. The foregoing steps are repeated a sufficient number of times to create the desired shape of the structure as defined by the regions held by the binder material.
摘要翻译： 公开了使用三维印刷技术制造结构的改进方法。 简而言之，该方法可以通过以下步骤来总结：将第一类粉末材料沉积在限定区域中以形成第一层。 接下来，将粘合剂材料施加到第一类型的粉末的某些区域以限定待形成的结构的一部分。 最后，使用真空技术除去一部分未结合的粉末。 重复上述步骤足够的次数以产生由粘合剂材料保持的区域所限定的结构的所需形状。
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