-
1.发明授权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：US08625691B2
公开(公告)日：2014-01-07
申请号：US13597781
申请日：2012-08-29
IPC分类号： H04L27/28
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。
-
2.发明授权Techniques for communicating over single-or multiple-antenna channels having both temporal and spectral fluctuations 有权用于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的技术公开(公告)号：US08325854B2
公开(公告)日：2012-12-04
申请号：US10194610
申请日：2002-07-12
IPC分类号： H04L27/06
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。
-
3.发明授权Methods and apparatus for mitigating the effects of solar noise and the like on a wireless communication system 有权用于减轻太阳能噪声等对无线通信系统的影响的方法和装置公开(公告)号：US07826795B2
公开(公告)日：2010-11-02
申请号：US11612920
申请日：2006-12-19
摘要： Techniques for reducing or eliminating effects of noise on a wireless communication system are provided. In one aspect of the invention, the technique comprises monitoring noise attributable to an interference source that may affect one or more components of the wireless communication system. The interference source being monitored is distant from the wireless communication system to the degree that noise arrives at the wireless communication system within a substantially point source-like angular range. For example, the noise may be attributable to the sun or tropospheric ducting. The technique then comprises initiating one or more operations, as a function of the monitored noise, to reduce or eliminate the effects of the noise attributable to the distant interference source at one or more of the components of the wireless communication system that are determined to be affected by such noise.
摘要翻译： 提供了用于减少或消除噪声对无线通信系统的影响的技术。 在本发明的一个方面中，该技术包括监测可能影响无线通信系统的一个或多个组件的可能受到干扰源的噪声。 所监视的干扰源远离无线通信系统，到达噪声到达无线通信系统的程度，在基本上类似点的角度范围内。 例如，噪音可能归因于太阳或对流层管道。 该技术包括作为所监视的噪声的函数启动一个或多个操作，以减少或消除归因于远程干扰源的噪声对被确定为无线通信系统的一个或多个组件的影响 受这种噪音影响。
-
4.发明授权Methods and apparatus for mitigating the effects of solar noise and the like on a wireless communication system 有权用于减轻太阳能噪声等对无线通信系统的影响的方法和装置公开(公告)号：US07209760B2
公开(公告)日：2007-04-24
申请号：US09850946
申请日：2001-05-08
摘要： Techniques for reducing or eliminating effects of noise on a wireless communication system are provided. In one aspect of the invention, the technique comprises monitoring noise attributable to an interference source that may affect one or more components of the wireless communication system. The interference source being monitored is distant from the wireless communication system to the degree that noise arrives at the wireless communication system within a substantially point source-like angular range. For example, the noise may be attributable to the sun or tropospheric ducting. The technique then comprises initiating one or more operations, as a function of the monitored noise, to reduce or eliminate the effects of the noise attributable to the distant interference source at one or more of the components of the wireless communication system that are determined to be affected by such noise.
摘要翻译： 提供了用于减少或消除噪声对无线通信系统的影响的技术。 在本发明的一个方面中，该技术包括监测可能影响无线通信系统的一个或多个组件的可能受到干扰源的噪声。 所监视的干扰源远离无线通信系统，到达噪声到达无线通信系统的程度，在基本上类似点的角度范围内。 例如，噪音可能归因于太阳或对流层管道。 该技术包括作为所监视的噪声的函数启动一个或多个操作，以减少或消除归因于远程干扰源的噪声对被确定为无线通信系统的一个或多个组件的影响 受这种噪音影响。
-
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。
-
公开(公告)号：US4596024A
公开(公告)日：1986-06-17
申请号：US497228
申请日：1983-05-23
申请人： David J. Thomson
发明人： David J. Thomson
CPC分类号： H04L1/00 , H04L7/0334 , H04L7/042 , H04L7/046
摘要： Received data signals in digital form are sampled a plurality of times during each bit interval and weighted to enhance the statistical effect of a predetermined intermediate amplitude range prior to accumulation over a bit time to obtain an initial average indication of bit value. Plural repetitions of the same bit received at different times are similarly processed and the averages weighted according to received signal strength at the time of reception. Then the weighted averages are accumulated in a two's complement arithmetic fashion so that the accumulation sign bit binary signal state indicates the binary value of the bit. In one embodiment, the initially derived multiple samples of each bit are converted to in-phase and quadrature-phase versions prior to the sample accumulation step; and the separate accumulations of each version are utilized to obtain an arctangent value for adjusting the phase of a local clock to that of the received data.
摘要翻译： 数字形式的接收数据信号在每个位间隔期间被多次采样并加权，以便在比特时间累积之前增强预定中间幅度范围的统计效果，以获得比特值的初始平均指示。 类似地处理在不同时间接收的相同位的多次重复，并且根据接收时的接收信号强度对平均值进行加权。 然后以二进制补码运算方式累加加权平均值，使累加符号位二进制信号状态表示该位的二进制值。 在一个实施例中，每个比特的初始导出的多个样本在样本累积步骤之前被转换成同相和正交相位版本; 并且利用每个版本的单独累积来获得用于将本地时钟的相位调整为接收数据的相位的反正切值。
-
公开(公告)号：US4493094A
公开(公告)日：1985-01-08
申请号：US411531
申请日：1982-08-26
申请人： David J. Thomson
发明人： David J. Thomson
CPC分类号： H04L7/0331
摘要： A programmable oscillation counter (10) is initially synchronized by presetting the counter to a predetermined correct phase condition by applying thereto a single digital signal set representing the magnitude of the phase correction to be applied. Subsequent tracking of the correct phase condition is accomplished by utilizing additional two's-complement digital signal sets from time to time to preset an incremental counter (11) to a level which indicates the extent of phase error. The latter counter is controlled to reduce the error by altering the phase of the oscillation counter operation by one step at a time each time the oscillation counter cycles through a predetermined phase of its operation and until the incremental counter has counted down its preset phase error magnitude to zero.
摘要翻译： 可编程振荡计数器（10）最初通过将计数器预置到预定的正确相位条件来同步，通过将计数器施加到表示要应用的相位校正的幅度的单个数字信号集合。 通过利用附加的二进制补码数字信号组来不断地将跟踪正确的相位条件预先设定为指示相位误差范围的增量计数器（11）。 控制后一个计数器以通过每次振荡计数器在其运行的预定阶段循环并且直到增量计数器向下计数其预置的相位误差幅度时将振荡计数器操作的相位改变一个步长来减小误差 到零。
-
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。
-
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。
-
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。
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.028 秒)