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81. 发明授权

US5357257A Apparatus and method for equalizing channels in a multi-channel communication system 失效
标题翻译：用于均衡多通道通信系统中的信道的装置和方法
公开(公告)号：US5357257A
公开(公告)日：1994-10-18
申请号：US43080
申请日：1993-04-05
申请人： Robert L. Nevin
发明人： Robert L. Nevin
IPC分类号： G01S7/40 , H04B7/005 , H04B7/08
CPC分类号： H04B7/0845 , G01S7/4021 , H04B7/005
摘要： A multi-channel electronic communication system with equalized channels comprises a reference channel and a plurality of object channels. A white noise excitation signal is injected into each channel. Each of the channels is sampled and, for each channel, the resultant samples are windowed and the windowed samples are Fast Fourier Transformed from the time domain to the frequency domain. Power spectral density estimates are determined for each object channel from the windowed samples in that channel. Cross-spectral density estimates for each object channel with respect to the reference channel are determined from the windowed samples in that object channel and the windowed samples in the reference channel. The power spectral density estimates are divided by the cross-spectral density estimates to derive correlation ratios which are converted back to the time domain to specify a corrective equalization filter weight vector for each object channel. An equalization filter in each object channel is then programmed with a respective filter weight vector specified by the corresponding correlation ratio and an equalization filter in the reference channel is programmed with a unity weight vector to equalize the channels in the system.
摘要翻译：具有均衡信道的多信道电子通信系统包括参考信道和多个对象信道。白噪声激励信号被注入每个通道。每个通道被采样，并且对于每个通道，将所得到的样本加窗，并且窗口样本从时域到频域进行快速傅立叶变换。从该通道中的窗口样本确定每个物体通道的功率谱密度估计。相对于参考通道的每个物体通道的交叉谱密度估计是从对象通道中的窗口样本和参考通道中的加窗样本确定的。功率谱密度估计被交叉谱密度估计除以导出相关比，其被转换回时域以指定每个对象信道的校正均衡滤波器权重向量。然后每个对象通道中的均衡滤波器用相应的相关比指定的相应的滤波器权重向量编程，并且参考信道中的均衡滤波器用单位权重向量编程以均衡系统中的信道。

82. 发明授权

US5349607A Receiver for a digital radiomobile system with cancellation of isofrequency interfering signals having the same kind of modulation, and relevant method 失效
标题翻译：具有消除具有相同类型调制的频率干扰信号的数字无线电移动系统的接收机及相关方法
公开(公告)号：US5349607A
公开(公告)日：1994-09-20
申请号：US859475
申请日：1992-08-14
申请人： Luigi Moreno
发明人： Luigi Moreno
IPC分类号： H04B7/005 , H04L1/00 , H03D1/00 , H04L27/06
CPC分类号： H04B7/005 , H04L25/0328 , H04L2025/03407 , H04L25/0212 , H04L25/0224
摘要： In one receiver for phase modulated digital signals, bit packet transmitted with known preamble, of the type foreseeing a maximum likelihood estimation circuit for distortion corrections, it is performed the cancellation of isofrequency interfering signals, having the same frequency of the useful signal and the same modulation type as well.This is obtained making an estimation of amplitude (A), phase (.PHI.) and time synchronism (.tau.) parameters of the interfering signal in correspondence of each bit packet and reconstructing the useful signal with a maximum likelihood estimation process employing these parameters (FIG. 1).
摘要翻译： PCT No.PCT / EP90 / 02297 Sec。 371日期：1992年8月14日 102（e）日期1992年8月14日PCT 1990年12月22日PCT PCT。公开号WO91 / 10295 日期为1991年7月11日。在用于相位调制数字信号的一个接收机中，使用预先知道用于失真校正的最大似然估计电路的类型的已知前导码发送的位分组，执行具有相同频率的等频干扰信号的消除的有用信号和相同的调制类型。获得这样的结果，对每个比特分组进行干扰信号的幅度（A），相位（PHI）和时间同步（τ）参数的估计，并用采用这些参数的最大似然估计处理来重构有用信号。 1）。

83. 发明授权

US5203016A Signal quality-dependent adaptive recursive integrator 失效
标题翻译：信号质量依赖自适应递归积分器
公开(公告)号：US5203016A
公开(公告)日：1993-04-13
申请号：US545299
申请日：1990-06-28
申请人： Donald K. Belcher , Darrell R. Gimlin
发明人： Donald K. Belcher , Darrell R. Gimlin
IPC分类号： H04B7/005
CPC分类号： H04B7/005
摘要： The gain of a recursive integrator is controlled so as to be adaptive to the quality of a received signal by comparing the magnitude of its emphasized information component with a reference voltage and controlling the gain of the integrator's feedback delay path in accordance with the difference between the peak value of the emphasized information component and the reference voltage. As a result, when the signal to noise ratio of the input signal is high, the gain can be reduced, so that the recursive loop will adapt quickly to changes in a multipath profile.
摘要翻译：控制递归积分器的增益，以便通过将其强调信息分量的大小与参考电压进行比较来适应接收信号的质量，并且根据所述积分器的反馈延迟路径的差异来控制积分器的反馈延迟路径的增益强调信息分量的峰值和参考电压。结果，当输入信号的信噪比高时，可以减小增益，使得递归循环将适应于多径分布中的变化。

84. 发明授权

US5170499A Method and apparatus for adjusting the volume level of a radio 失效
标题翻译：用于调节收音机音量的方法和装置
公开(公告)号：US5170499A
公开(公告)日：1992-12-08
申请号：US619806
申请日：1990-11-27
申请人： Timothy A. Grothause
发明人： Timothy A. Grothause
IPC分类号： H04B7/005
CPC分类号： H04B7/005
摘要： Radios (104) are commanded to determine the ambient sound level. A code representing the ambient sound level is transmitted to a calling radio (104c) or base unit 102, that determines whether to adjust the volume level (up or down) of the called radio (104a, 104b). In this way, messages will not be missed when the radio is used in a noisy environment, and messages will not be presented at an uncomfortable volume level when the radio is operating in a quite environment. In another embodiment, the called radio (104a, 104b) transmits whatever ambient sounds exists, and the ambient sound level is determined by the calling party (104c, 102).
摘要翻译：命令无线电（104）确定环境声级。表示环境声级的代码被发送到呼叫无线电（104c）或基本单元102，该主机确定是否调整被叫无线电（104a，104b）的音量（上或下）。以这种方式，当无线电在嘈杂的环境中使用时，不会错过消息，并且当无线电在相当环境中操作时，消息将不会呈现在不舒服的音量级别。在另一个实施例中，被叫无线电（104a，104b）传输任何环境声音存在，并且环境声级由呼叫方（104c，102）确定。

85. 发明授权

US5075095A Method for preparation of diamond ceramics 失效
标题翻译：金刚石陶瓷的制备方法
公开(公告)号：US5075095A
公开(公告)日：1991-12-24
申请号：US413144
申请日：1989-09-27
申请人： John M. Pinneo
发明人： John M. Pinneo
IPC分类号： C01B31/06 , C23C16/27 , H04B1/40 , H04B7/005
CPC分类号： C23C16/274 , C01B31/065 , C23C16/27 , H04B1/405 , H04B7/005
摘要： Processes are provided for consolidating diamond particles into a mechanically stable diamond mass, called a diamond ceramic. A compacted aggregation of diamond particles is subjected to low pressure PECVD conditions in the presence of atomic hydrogen, with or without a carbon source gas, whereby a mechanically stable diamond ceramic is formed substantially devoid of interstitial spaces.
摘要翻译：提供了将金刚石颗粒固结成机械稳定的金刚石块（称为金刚石陶瓷）的工艺。金刚石颗粒的压实聚集体在存在原子氢的情况下经受低压PECVD条件，具有或不具有碳源气体，由此形成基本上没有间隙的机械稳定的金刚石陶瓷。

86. 发明授权

US4780885A Frequency management system 失效
标题翻译：频率管理系统
公开(公告)号：US4780885A
公开(公告)日：1988-10-25
申请号：US754726
申请日：1985-07-15
申请人： Haim D. Paul , Joseph M. Perl
发明人： Haim D. Paul , Joseph M. Perl
IPC分类号： H04B1/74 , H04B7/005 , H04B9/00
CPC分类号： H04B7/005 , H04B1/74
摘要： A high frequency (HF) frequency-management system for automatically selecting optimum HF frequency. A frequency management means controls the operation of a regular HF radio communications transmitter and receiver at each station. The frequency-management means transmits sounding signals synchronously and repeatedly over a finite group of HF frequencies, from a first radio communications station to a second radio communications station. Link quality evaluation (LQE) is carried out at the second station. Sounding signals are transmitted synchronously and repeatedly back to the first station. Optimum HF frequencies are selected based on the sounding signals and LQE. An HF communications path is automatically established between stations. The system performs the scanning of the HF frequencies, the detection and measurement of signals, noise and interferences on each frequency and the timing synchronization as required for the frequency management operation.
摘要翻译：用于自动选择最佳HF频率的高频（HF）频率管理系统。频率管理装置控制每个站的正常HF无线电通信发射机和接收机的操作。频率管理装置通过有限的一组HF频率从第一无线电通信站到第二无线电通信站同步和重复地发送探测信号。链路质量评估（LQE）在第二站进行。探测信号被同步传输并重复传送回第一站。根据探测信号和LQE选择最佳HF频率。站之间自动建立HF通信路径。系统根据频率管理操作的要求进行HF频率的扫描，信号的检测和测量，每个频率的噪声和干扰以及定时同步。

87. 发明授权

US4675880A Antimultipath communication by injecting tone into null in signal spectrum 失效
标题翻译：通过在信号频谱中将色调注入空值来进行抗多普勒通信
公开(公告)号：US4675880A
公开(公告)日：1987-06-23
申请号：US729719
申请日：1985-05-02
申请人： Faramaz Davarian
发明人： Faramaz Davarian
IPC分类号： H04B7/005 , H04L5/12 , H04B1/10
CPC分类号： H04B7/005
摘要： A transmitter for digital radio communication creates a null by balanced encoding of data modulated on an RF carrier, and inserts a calibration tone within the null. By having the calibration tone coincide in phase and frequency with the transmitted radio frequency output for coherent demodulation of data at the receiver where the tone calibration signal is extracted and used for multipath fading compensation.
摘要翻译：用于数字无线电通信的发射机通过对在RF载波上调制的数据进行平衡编码而产生零，并将校准音调插入空值。通过使相位和频率的校准音与所发送的射频输出相一致，以在提取音调校准信号的接收机处进行数据的相干解调，并将其用于多径衰落补偿。

88. 发明授权

US4361892A Adaptive equalizer 失效
标题翻译：自适应均衡器
公开(公告)号：US4361892A
公开(公告)日：1982-11-30
申请号：US203646
申请日：1980-11-03
申请人： Gary D. Martin
发明人： Gary D. Martin
IPC分类号： H04B7/005 , H04B3/14
CPC分类号： H04B7/005
摘要： An adaptive equalizer is disclosed comprising an amplitude equalizer circuit (12) having an adjustable Q, and a plurality of all-pass circuits (14,15) having adjustable delay bumps. A controller (18) adjusts the tuning, magnitude of the bumps, and the number of all-pass networks in the equalizer in response to variations in the power within a plurality of spectrum samples and the bit error rate of the equalizer output signal.
摘要翻译：公开了一种自适应均衡器，其包括具有可调Q的幅度均衡器电路（12）和具有可调延迟凸块的多个全通电路（14,15）。控制器（18）响应于多个频谱样本内的功率的变化和均衡器输出信号的误码率来调整均衡器的调谐，凸块的大小和全通网络的数量。

89. 发明授权

US4295221A Method and apparatus at one-way or two-way information link to effect interference suppression 失效
标题翻译：单向或双向信息链接的方法和装置，以实现干扰抑制
公开(公告)号：US4295221A
公开(公告)日：1981-10-13
申请号：US897374
申请日：1978-04-18
申请人： Bengt Henoch , Eilert Berglind
发明人： Bengt Henoch , Eilert Berglind
IPC分类号： H01Q21/24 , H04B7/005 , H03K5/08 , H03K7/06
CPC分类号： H01Q21/24 , H04B7/005
摘要： A radio communication method and apparatus for transmitting a modulated radio frequency signal from a first station to a second station wherein an information-bearing pulse train for modulating the radio frequency signal is chopped at a constant pre-selected rate, wherein a receiver at the second station receives the modulated radio frequency signal and has a detector for detecting the received radio frequency signal to provide an intelligence signal component containing the information and having a frequency corresponding to the pre-selected chopping rate, a bandpass filter tuned to the pre-selected chopping frequency for passing the above mentioned intelligence signal component while rejecting other signal components of different frequencies, circuitry for processing the intelligence signal component passed by the bandpass filter, and a circuit connected intermediate the detector and the bandpass filter for passing to the bandpass filter just those pulse signal components having a pulse width corresponding to the width of pulses in the chopped-up pulse train and a maximum amplitude exceeding a pre-selected threshold level.
摘要翻译：一种用于将调制后的射频信号从第一站发送到第二站的无线电通信方法和装置，其中用于调制射频信号的信息承载脉冲串以恒定的预选速率被切断，其中第二个接收机站接收调制射频信号，并具有用于检测接收到的射频信号的检测器，以提供包含该信息并且具有与预选斩波速率相对应的频率的智能信号分量，调谐到预选斩波的带通滤波器通过上述智能信号分量同时拒绝不同频率的其他信号分量的频率，用于处理由带通滤波器通过的智能信号分量的电路，以及连接在检测器和带通滤波器之间的电路，仅传送到带通滤波器具有pu的脉冲信号分量对应于斩波脉冲串中的脉冲宽度的lse宽度和超过预先选择的阈值电平的最大幅度。

90. 发明授权

US4283693A Amplitude tilt compensating apparatus 失效
标题翻译：振幅倾斜补偿装置
公开(公告)号：US4283693A
公开(公告)日：1981-08-11
申请号：US150861
申请日：1980-05-19
申请人： Eliseo Saenz
发明人： Eliseo Saenz
IPC分类号： H04B7/005 , H03H7/03
CPC分类号： H04B7/005
摘要： Circuitry is disclosed for detecting signal amplitudes of a signal which is phase indicative of a digital logic level and providing a feedback signal for use in amplitude adjusting the signal to have a substantially zero slope over the relevant frequency bandwidth. The compensation is obtained by applying a voltage to variable impedance pin diodes which form part of a reactive load circuit.
摘要翻译：公开了用于检测信号的信号幅度的电路，该信号是指示数字逻辑电平的相位，并且提供反馈信号用于幅度调整信号以在相关频率带宽上具有基本为零的斜率。通过向形成无功负载电路的一部分的可变阻抗pin二极管施加电压来获得补偿。

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