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1.发明授权Spread spectrum code pulse position modulated receiver having delay spread compensation 失效扩频码脉冲位置调制接收机具有延迟扩展补偿
公开(公告)号：US5623511A
公开(公告)日：1997-04-22
申请号：US345110
申请日：1994-11-28
CPC分类号： H04B1/7093 , H04B1/69 , H04B1/707 , H04B14/026
摘要： A spread spectrum code pulse position modulated communication system is disclosed. The communication system includes a spread spectrum code pulse position modulated receiver that compensates for the delay spread of a transmission medium, such as a wireless radio channel of a local area network. Delay spread may cause signal components of one transmitted spread spectrum codeword to spill over into chip positions of adjacent symbols, causing intersymbol interference, or into chip positions on quadrature channels of a given symbol interval, such as in a QPSK implementation, causing interchip interference. The disclosed receiver decodes a transmitted spread spectrum code pulse position modulated signal in the presence of such delay spread, utilizing a tentative symbol estimator to sample the matched filter data. The tentative symbol estimator will assign a weight to each potential symbol value, taking into account the cross-rail or bias influence caused by the residual coupling between the signals on quadrature channels for a given symbol duration. In addition, the disclosed receiver includes a mode sifter which evaluates the weighted values for each symbol estimate and assigns final estimates to each symbol value, taking into account the influence of codewords transmitted during one or more successive symbol intervals on one another.
摘要翻译： 公开了一种扩频码脉冲位置调制通信系统。 通信系统包括扩频码脉冲位置调制接收机，用于补偿诸如局域网的无线无线电信道之类的传输介质的延迟扩展。 延迟扩展可能导致一个发射的扩展频谱码字的信号分量溢出到相邻符号的码片位置，导致符号间干扰，或者在给定符号间隔的正交信道上的码片位置，例如在QPSK实现中，导致芯片间干扰。 所公开的接收机在存在这种延迟扩展的情况下解码发射的扩频码脉冲位置调制信号，利用临时符号估计器来对匹配的滤波数据进行采样。 考虑到在给定符号持续时间内正交信道上的信号之间的残余耦合引起的横轨或偏置影响，暂定符号估计器将为每个潜在符号值分配权重。 此外，所公开的接收机包括模式筛选器，其对每个符号估计的加权值进行评估，并且考虑到在一个或多个连续符号间隔期间彼此发送的码字的影响，将最终估计分配给每个符号值。
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公开(公告)号：US07257384B2
公开(公告)日：2007-08-14
申请号：US10418905
申请日：2003-04-18
IPC分类号： H04B1/08
摘要： Apparatus for detecting the envelope of an RF signal that comprises an RF transistor operating essentially at a non-linear operating point at the RF frequency range; a DC power supply for feeding the RF transistor; a dummy load for terminating the output of the RF transistor; and at lease one impedance, through which the DC power supply feeds the RF transistor, for obtaining an indication signal developed across the impedance. The indication signal represents the envelope, from the fluctuating current drawn by the RF transistor from the DC power supply during the time period when the RF signal is applied to the feeding input.
摘要翻译： 用于检测RF信号的包络的装置，其包括基本上在RF频率范围的非线性工作点操作的RF晶体管; 用于馈送RF晶体管的DC电源; 用于终止RF晶体管的输出的虚拟负载; 并且至少一个阻抗，直流电源通过该阻抗馈送RF晶体管，以获得跨阻抗产生的指示信号。 指示信号表示在将RF信号施加到馈送输入的时间段期间由RF晶体管从直流电源引起的波动电流的包络线。
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公开(公告)号：US6044120A
公开(公告)日：2000-03-28
申请号：US850132
申请日：1997-05-01
申请人： Israel Bar-David , Glenn David Golden , Thomas Louis Marzetta , Nelson Ray Sollenberger , Jack Harriman Winters
发明人： Israel Bar-David , Glenn David Golden , Thomas Louis Marzetta , Nelson Ray Sollenberger , Jack Harriman Winters
IPC分类号： H04B7/08
CPC分类号： H04B7/0854
摘要： An apparatus for performance improvement of a digital wireless receiver comprises a processing circuit for processing a plurality of received signals and providing a processed signal, wherein a plurality of weights is applied to the plurality of received signals producing a plurality of weighted received signals. The plurality of weighted received signals are combined to provide the processed signal. A weight generation circuit generates the plurality of weights, wherein weights are generated so as to solve a minimization problem that penalizes excessive time variability in the weights.
摘要翻译： 一种用于数字无线接收机的性能改进的装置包括处理电路，用于处理多个接收信号并提供处理的信号，其中多个权重被应用于产生多个加权接收信号的多个接收信号。 多个加权接收信号被组合以提供经处理的信号。 权重生成电路生成多个权重，其中生成权重以便解决惩罚权重中的过多时间变化性的最小化问题。
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公开(公告)号：US07710203B2
公开(公告)日：2010-05-04
申请号：US11912732
申请日：2006-04-27
IPC分类号： H03F3/04
CPC分类号： H03F1/32 , H03F1/0211 , H03F2200/271 , H03F2200/273 , H03F2200/351 , H03F2200/504 , H03F2200/511
摘要： Circuitry for providing improved pulse-type enhancement of the voltage supplied to a power amplifier (101) that is fed by a power supply that is connected to the power amplifier (101) at a feeding point through a main supply path that is connected via an inductor (L1). A second feeding point is used for enhancement by a capacitor that is discharged. A transformer L2, L3, M) is formed by mutually coupling an additional inductor (L3), through which an additional supply path is connected. Enhancement power is provided partially through the transformer L2, L3, M) and the remaining part thorough the capacitor (C1). This way, the total level of possible enhancement is increased, while minimizing distortion of the envelope of the amplified RF signal.
摘要翻译： 电路，用于提供提供给功率放大器（101）的电压的改进的脉冲型增强，该功率放大器（101）由在馈电点处连接到功率放大器（101）的电源馈送，所述主电源路径经由主供电路径 电感（L1）。 第二馈电点被放电的电容器增强。 变压器L2，L3，M）通过相互耦合附加电感器（L3）而形成，附加的电源路径通过该附加电感器连接。 增强功率部分地通过变压器L2，L3，M）提供，剩余部分通过电容器（C1）提供。 这样，增加可能增强的总水平，同时使放大的RF信号的包络的失真最小化。
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5.发明授权Method and apparatus for improving the efficiency of power amplifiers, operating under a large peak-to-average ratio 有权用于提高功率放大器效率的方法和装置，在大的峰均比下工作公开(公告)号：US06492867B2
公开(公告)日：2002-12-10
申请号：US09815196
申请日：2001-03-22
申请人： Israel Bar-David
发明人： Israel Bar-David
IPC分类号： H03F338
CPC分类号： H04L27/2626 , H03F1/0222 , H03F1/0244 , H03F1/025 , H03F2200/504 , H03F2203/21196 , H03G3/004 , H04L27/2614
摘要： Method and apparatus for improving the efficiency and the dynamic range of a power amplifier operated with signals having a large peak-to-average ratio. A reference level is determined, above which at least a portion of the magnitude of an input signal being a modulated signal that is input to the power amplifier, or a baseband waveform that is used to generate the modulated signal, is defined as an excess input signal. The magnitude of the input signal is continuously sampled, for detecting an excess input signal. A lower level of operating voltage is supplied to the power amplifier, if no excess input signal is detected. The lower level of operating voltage is sufficient to effectively amplify input signals having a magnitude below the reference level. A higher level of operating voltage is supplied to the power amplifier, whenever an excess input signal is detected. The higher level of operating voltage is sufficient to effectively amplify input signals having a magnitude above the reference level.
摘要翻译： 用于提高由具有大的平均峰比的信号操作的功率放大器的效率和动态范围的方法和装置。 确定参考电平，在该参考电平之上，将输入到功率放大器的调制信号的输入信号的幅度的至少一部分或用于产生调制信号的基带波形定义为过量输入 信号。 连续采样输入信号的大小，以检测输入信号的过剩。 如果没有检测到过多的输入信号，则将较低电平的工作电压提供给功率放大器。 较低的工作电压水平足以有效地放大具有低于参考电平的幅度的输入信号。 每当检测到过量的输入信号时，将更高级别的工作电压提供给功率放大器。 较高的工作电压水平足以有效地放大具有高于参考电平的幅度的输入信号。
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6.发明授权Method and apparatus for smoothing out phase fluctuations in a monitored signal 失效用于平滑监视信号中的相位波动的方法和装置
公开(公告)号：US5235290A
公开(公告)日：1993-08-10
申请号：US883312
申请日：1992-05-14
申请人： Israel Bar-David
发明人： Israel Bar-David
IPC分类号： H03L7/087
CPC分类号： H03L7/087
摘要： A method and apparatus for smoothing out phase fluctuations in a monitored input signal by: detecting the partial-cycle differences in phase between the input signal and a reference signal, and generating a first error signal representing the partial-cycle differences in phase; detecting full-cycle differences in phase between the input signal and the reference signal, and generating a second error signal representing the full-cycle differences in phase; and utilizing the first and second error signals for smoothing out the phase fluctuations in the input signal.
摘要翻译： 一种用于通过检测输入信号和参考信号之间的相位中的部分周期差异来平滑所监视的输入信号中的相位波动并产生表示相位的部分周期差的第一误差信号的方法和装置; 检测输入信号和参考信号之间的相位的全周期差异，以及产生代表相位的全周期差异的第二误差信号; 并利用第一和第二误差信号来平滑输入信号中的相位波动。
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7.发明授权
公开(公告)号：US5596601A
公开(公告)日：1997-01-21
申请号：US298260
申请日：1994-08-30
申请人： Israel Bar-David
发明人： Israel Bar-David
CPC分类号： H04B1/69 , H04B1/707 , H04B14/026
摘要： A spread spectrum code pulse position modulated communication system is disclosed. The frequency spectrum of a transmitted signal is spread by encoding bits with a predefined spectrum-spreading codeword which is in accordance with regulatory requirements or other standardization decisions. When the predefined spread spectrum codeword is passed through a filter matched to the characteristics of the codeword, a peak is detected in the main lobe. A positive main lobe can indicate a binary value of "0" and a negative main lobe, associated with the inverse of the predefined codeword, can represent a binary value of "1". Additional information is conveyed by modulating the position of the center of the codeword within the symbol duration. In one embodiment, the position of the center of the codeword is varied among eight positions. Thus, eight signal states are available, and three additional bits may thereby be conveyed. Two differently and independently time-shifted spread spectrum codewords may be modulated, each with one of two orthogonal carrier signals, such as a sine and a cosine wave, thereby conveying a total of eight bits per symbol duration. Here, a symbol duration is the duration of a codeword.
摘要翻译： 公开了一种扩频码脉冲位置调制通信系统。 发送信号的频谱通过按照规则要求或其他标准化决定的预定的频谱扩展码字对比特进行扩频。 当预定义的扩展频谱码字通过与码字的特性匹配的滤波器时，在主瓣中检测到峰值。 正的主瓣可以指示二进制值“0”，并且与预定义代码字的反相关联的负主瓣可以表示二进制值“1”。 附加信息通过调制符号持续时间内码字中心的位置来传达。 在一个实施例中，码字的中心的位置在八个位置之间变化。 因此，八个信号状态是可用的，并且因此可以传送三个附加位。 两个不同且独立的时移扩展频谱码字可以被调制，每个具有两个正交载波信号之一，例如正弦波和余弦波，从而每码元持续时间总共传送八位。 这里，符号持续时间是码字的持续时间。
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公开(公告)号：US5570364A
公开(公告)日：1996-10-29
申请号：US227756
申请日：1994-04-14
申请人： Israel Bar-David
发明人： Israel Bar-David
IPC分类号： H04L12/403 , H04J3/16
CPC分类号： H04L12/403
摘要： In a communication system, a network has nodes each connected in a star relationship to a number of end units that include a device for assuming one of an idle, active, or on-line state and for requesting the node to which it is connected to change it from the idle to the active and the active to the on-line state, and for releasing the on-line state on the basis of data at the end unit. The nodes for change the state of an end unit from the idle to the active and from the active to the on-line mode on the basis of available communication time. According to an embodiment of the invention, the nodes change the states to the on line state on the basis of policy preferences for the type of traffic, and specifically to grant priority to stream traffic over batch traffic.
摘要翻译： 在通信系统中，网络具有每个以星形关系连接到多个终端单元的节点，其包括用于假设空闲，活动或在线状态之一的设备，并且用于请求与其连接的节点 将其从空闲状态更改为活动状态，激活状态到在线状态，并根据终端单元的数据释放在线状态。 节点用于根据可用的通信时间将终端单元的状态从空闲状态改变为活动状态，从活动状态改变为在线模式。 根据本发明的实施例，节点基于针对业务类型的策略偏好来将状态改变为在线状态，并且具体地授予优先级来批量流量上的流量。
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9.发明授权
公开(公告)号：US5237287A
公开(公告)日：1993-08-17
申请号：US903397
申请日：1992-06-24
申请人： Israel Bar-David
发明人： Israel Bar-David
IPC分类号： H04L27/22 , H04L27/233
CPC分类号： H04L27/223 , H04L27/2331
摘要： A method and apparatus are described for demodulating a modulated signal having a carrier component and a data component, in which the modulated signal is split into at least two parts one of which is delayed with respect to the other, and the two parts are multiply-coupled and linearly-combined to produce a combined output corresponding to a function of the data component independent of the carrier component frequency. In the described method and apparatus the undelayed part is coupled with the delayed part in a multiport coupler, wherein the parts are relatively phase-shifted to produce a plurality of phase-shifted signals; and the phase-shifted signals are linearly combined such that the data component, in the function of the combined output, is not affected by variations in frequency or phase of the carrier component. This enables a robust direct-detection DPSK receiver.
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公开(公告)号：US20090295475A1
公开(公告)日：2009-12-03
申请号：US11912732
申请日：2006-04-27
IPC分类号： H03F1/00
CPC分类号： H03F1/32 , H03F1/0211 , H03F2200/271 , H03F2200/273 , H03F2200/351 , H03F2200/504 , H03F2200/511
摘要： Circuitry for providing improved pulse-type enhancement of the voltage supplied to a power amplifier (101) that is fed by a power supply that is connected to the power amplifier (101) at a feeding point through a main supply path that is connected via an inductor (L1). A second feeding point is used for enhancement by a capacitor that is discharged. A transformer L2, L3, M) is formed by mutually coupling an additional inductor (L3), through which an additional supply path is connected. Enhancement power is provided partially through the transformer L2, L3, M) and the remaining part thorough the capacitor (C1). This way, the total level of possible enhancement is increased, while minimizing distortion of the envelope of the amplified RF signal.
摘要翻译： 电路，用于提供提供给功率放大器（101）的电压的改进的脉冲型增强，该功率放大器（101）由在馈电点处连接到功率放大器（101）的电源馈送，所述主电源路径经由主供电路径 电感（L1）。 第二馈电点被放电的电容器增强。 变压器L2，L3，M）通过相互耦合附加电感器（L3）而形成，附加的电源路径通过该附加电感器连接。 增强功率部分地通过变压器L2，L3，M）提供，剩余部分通过电容器（C1）提供。 这样，增加可能增强的总水平，同时使放大的RF信号的包络的失真最小化。
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