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公开(公告)号：US5978415A
公开(公告)日：1999-11-02
申请号：US533119
申请日：1995-09-25
CPC分类号： H04L27/01
摘要： The invention provides an automatic amplitude equalizer for compensating an amplitude characteristic of an input signal, wherein a control signal for equalizing an inclination amplitude distortion of an input signal is detected making use of a pair of digital demodulated signals to compensate for the amplitude characteristic of the input signal with a high degree of accuracy and which can be constructed with a reduced circuit scale and at a reduce cost. The automatic amplitude equalizer includes a first-order inclination amplitude equalization section for compensating for an amplitude characteristic of an input signal in accordance with a first-order inclination amplitude characteristic, and a control section for discriminating a direction of variation of a value of a first one of a pair of digital demodulated signals originating from the input signal, detecting error information from the other, second one of the digital demodulated signals which is orthogonal to the first signal, and outputting a control signal for the first-order inclination amplitude equalization section based on a correlation between the error information and the direction of variation of the value of the first signal.
摘要翻译： 本发明提供一种自动幅度均衡器，用于补偿输入信号的幅度特性，其中使用一对数字解调信号来检测用于均衡输入信号的倾斜幅度失真的控制信号，以补偿输入信号的振幅特性 输入信号具有高精确度，并且可以以降低的电路规模和降低成本来构造。 自动幅度均衡器包括：一阶倾斜幅度均衡部分，用于根据一阶倾斜幅度特性补偿输入信号的幅度特性;以及控制部分，用于鉴别第一 从输入信号产生的一对数字解调信号中的一个，从与第一信号正交的数字解调信号中的另一个第二数字解调信号检测出错误信息，并输出一阶倾斜幅度均衡部分的控制信号 基于误差信息与第一信号的值的变化方向之间的相关性。
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公开(公告)号：US5867542A
公开(公告)日：1999-02-02
申请号：US552543
申请日：1995-11-03
CPC分类号： H04L27/38 , H04L7/0037 , H04L7/0054 , H04L7/0334 , H04L7/0029 , H04L7/027
摘要： The present invention relates to a clock phase detecting circuit and a clock regenerating circuit each arranged in a receiving unit of multiplex radio equipment. The receiving unit of the multiplex radio equipment includes an identifying circuit for identifying a signal obtained by demodulating a multilevel orthogonal modulation signal; a clock regenerating circuit for regenerating a signal identification clock for the identifying circuit to supply the clock to the identifying circuit; an equalizing circuit for subjecting the signal obtained by demodulating a multilevel orthogonal modulation signal to an equalizing process. A clock phase detecting unit detects the phase component of the signal identification clock based on signals input to or output from the equalizing circuit and then supplies the phase component to the clock regenerating circuit. The phase component of a signal identification clock can be certainly detected and accurately adjusted so that the signal identification clock can be regenerated with high accuracy.
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公开(公告)号：US6029056A
公开(公告)日：2000-02-22
申请号：US962054
申请日：1997-10-31
CPC分类号： H04B7/084 , H01Q3/26 , H04B7/0851 , H04B7/0865
摘要： A space diversity receiver apparatus receives signals by two spatially separated antennas, controls the phase of the signal received by one of the antennas by a phase control circuit, combines the phase-controlled signal and the signal received by the other antenna by a combiner and outputs the combined signal. A digital detector digitally detects the center frequency level and the levels on high- and low-frequency sides of the center frequency of the combined signal. Phase is controlled in such a manner that the center frequency level will coincide with a set level and a deviation between the levels on the high- and low-frequency sides of the center frequency will become zero.
摘要翻译： 空间分集接收机装置通过两个空间分离的天线接收信号，通过相位控制电路控制由天线之一接收到的信号的相位，将相位控制信号和由另一个天线接收的信号组合在一起，并输出 组合信号。 数字检测器以组合信号的中心频率的高频和低频侧数字检测中心频率电平和电平。 相位被控制为使得中心频率电平与设定电平一致，并且中心频率的高频和低频侧的电平之间的偏差将变为零。
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公开(公告)号：US6028902A
公开(公告)日：2000-02-22
申请号：US828419
申请日：1997-03-28
CPC分类号： H04L7/0054 , H04L7/0062
摘要： A clock phase detecting circuit is provided which is arranged in a receiving section of a multiplex radio apparatus. Difference detecting unit detects the difference between input and output signals to and from an equalizing circuit, and squaring unit squares the detected difference. The squared value thus obtained shows a minimum value when the phase of a clock signal output from a clock regenerating circuit coincides with a normal position of signal point. Therefore, phase adjusting unit outputs a control signal to the clock regenerating circuit while monitoring the squared value, to adjust the phase of the clock signal output from the clock regenerating circuit so that the squared value output from the squaring unit may be minimized.
摘要翻译： 提供了一种布置在多路复用无线电设备的接收部分中的时钟相位检测电路。 差分检测单元检测来自均衡电路的输入和输出信号之间的差异，平方单元对检测到的差异进行平方。 由此获得的平方值表示从时钟再生电路输出的时钟信号的相位与信号点的正常位置一致的最小值。 因此，相位调整单元在监视平方值的同时向时钟再生电路输出控制信号，调整从时钟再生电路输出的时钟信号的相位，使从平方单元输出的平方值最小化。
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5.再颁专利Clock phase detecting circuit and clock regenerating circuit each arranged in receiving unit of multiplex radio equipment 有权时钟相位检测电路和时钟再生电路，各自布置在多路复用无线电设备的接收单元中公开(公告)号：USRE40695E1
公开(公告)日：2009-04-07
申请号：US09771229
申请日：2001-01-26
CPC分类号： H04L27/38 , H04L7/0029 , H04L7/0037 , H04L7/0054 , H04L7/027 , H04L7/0334
摘要： The present invention relates to a clock phase detecting circuit and a clock regenerating circuit each arranged in a receiving unit of multiplex radio equipment. The receiving unit of the multiplex radio equipment includes an identifying circuit for identifying a signal obtained by demodulating a multilevel orthogonal modulation signal; a clock regenerating circuit for regenerating a signal identification clock for the identifying circuit to supply the clock to the identifying circuit; an equalizing circuit for subjecting the signal obtained by demodulating a multilevel orthogonal modulation signal to an equalizing process. A clock phase detecting unit detects the phase component of the signal identification clock based on signals input to or output from the equalizing circuit and then supplies the phase component to the clock regenerating circuit. The phase component of a signal identification clock can be certainly detected and accurately adjusted so that the signal identification clock can be regenerated with high accuracy.
摘要翻译： 时钟相位检测电路和时钟再生电路技术领域本发明涉及一种时钟相位检测电路和时钟再生电路，每个时钟相位检测电路和时钟再生 复用无线电设备的接收单元包括识别电路，用于识别通过解调多电平正交调制信号而获得的信号; 时钟再生电路，用于再生用于识别电路的信号识别时钟，以将时钟提供给识别电路; 均衡电路，用于对通过解调多级正交调制信号获得的信号进行均衡处理。 时钟相位检测单元基于输入到均衡电路或从均衡电路输出的信号来检测信号识别时钟的相位分量，然后将相位分量提供给时钟再生电路。 信号识别时钟的相位分量可以被可靠地检测和精确地调整，从而可以高精度地再现信号识别时钟。
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公开(公告)号：US5594389A
公开(公告)日：1997-01-14
申请号：US565732
申请日：1995-11-30
IPC分类号： H03L7/10 , H03L7/085 , H03L7/087 , H04L27/227 , H04L27/38
CPC分类号： H03L7/085 , H03L7/087 , H04L27/3836
摘要： A carrier regeneration circuit achieves quick frequency synchronization without using a sweeper. An area judging device judges whether a baseband signal, quadrature-demodulated with a regenerated carrier output from a voltage-controlled oscillator, lies inside a designated area in a phase plane. If it is inside the designated area, an output of a phase comparator is selected, and if it has exited the area, the previous value is held. The designated area is set so that the direction of control indicated by the phase comparator, just before the baseband signal rotating in the phase plane exits the area, coincides with a direction that suppresses the rotation.
摘要翻译： 载波再生电路可实现快速频率同步而不使用扫频器。 区域判断装置判断从压控振荡器输出的再生载波正交解调的基带信号是否位于相平面内的指定区域内。 如果在指定区域内，则选择相位比较器的输出，如果已经退出该区域，则保持以前的值。 指定区域被设定为使得相位比较器指示的控制方向恰好在相平面中的基带信号旋转离开该区域之前与抑制旋转的方向一致。
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公开(公告)号：US06487261B2
公开(公告)日：2002-11-26
申请号：US09784491
申请日：2001-02-15
IPC分类号： H04B110
CPC分类号： H04L25/03006 , H04L25/062 , H04L2025/0342
摘要： A distortion compensating device provided in a receiver for compensating distortion which is added to a signal in a transmission path. The signal is generated in a multi-level modulator of a transmitter in which a digital signal is mapped to one of a plurality of specified signal points in a signal space diagram. The device includes a signal-point-position averaging circuit for producing an average signal point for each of a plurality of distributions of received signal points in the signal space diagram. A discrimination circuit in the device discriminates the average signal point closest to a received signal point from other average signal points in the signal space diagram.
摘要翻译： 一种在接收机中提供的用于补偿被添加到传输路径中的信号的失真的失真补偿装置。 信号在发射机的多电平调制器中产生，其中数字信号被映射到信号空间图中的多个指定信号点中的一个。 该装置包括信号点位置平均电路，用于产生信号空间图中的接收信号点的多个分布中的每一个的平均信号点。 设备中的识别电路从信号空间图中的其他平均信号点鉴别最接近接收信号点的平均信号点。
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公开(公告)号：US06201841B1
公开(公告)日：2001-03-13
申请号：US08526766
申请日：1995-09-11
IPC分类号： H04B110
CPC分类号： H04L25/03006 , H04L25/062 , H04L2025/0342
摘要： A distortion compensating device provided in a receiver for compensating distortion which is added to a signal in a transmission path. The signal is generated in a multi-level modulator of a transmitter of which a digital signal is mapped to one of a plurality of specified signal points in a signal space diagram. The device includes discrimination circuits for discriminating a received signal according to threshold lines partitioning the signal space diagram into discrimination areas, the threshold lines being defined so that the discrimination areas on an outer side of the signal space diagram having each an area greater than an area of each of the discrimination areas on an inner side of the signal space diagram and a selection circuit for selecting one of a plurality of threshold line patterns based on a level of the received signal which is discriminated according to a selected threshold line pattern.
摘要翻译： 一种在接收机中提供的用于补偿被添加到传输路径中的信号的失真的失真补偿装置。 该信号是在信号空间图中将数字信号映射到多个指定信号点中的一个的发射机的多电平调制器中产生的。 该装置包括用于根据将信号空间图划分为鉴别区域的阈值线来识别接收信号的鉴别电路，阈值线被定义为使信号空间图的外侧上的每个面积大于面积的区分 信号空间图的内侧上的每个鉴别区域的选择电路，以及用于根据所选择的阈值线路图案识别的接收信号的电平来选择多个阈值线路图案之一的选择电路。
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公开(公告)号：US06987814B2
公开(公告)日：2006-01-17
申请号：US10177075
申请日：2002-06-20
IPC分类号： H04L27/36
CPC分类号： H04L25/03006 , H04L25/062 , H04L2025/0342
摘要： A distortion compensating device provided in a receiver for compensating distortion which is added to a signal in a transmission path. The signal is generated in a multi-level modulator of a transmitter in which a digital signal is mapped to one of a plurality of specified signal points in a signal space diagram. The device includes a signal-point-position averaging circuit for producing an average signal point for each of a plurality of distributions of received signal points in the signal space diagram. A discrimination circuit in the device discriminates the average signal point closest to a received signal point from other average signal points in the signal space diagram.
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公开(公告)号：US5406589A
公开(公告)日：1995-04-11
申请号：US909712
申请日：1992-07-07
CPC分类号： H04B7/002
摘要： A fractionally spaced cross-polarization interference canceller, wherein a compensation signal is generated through an adaptive filter operating in a frequency that is an integer multiple of a transmission data frequency. The cross-polarization interference canceller includes a mechanism for generating an error signal used to control coefficients of the adaptive filter in the integer multiple frequency. The mechanism is realized, for example, by using a waveform generator generating an estimate of a baseband signal in the integer multiple frequency using a plurality of estimates of transmission data and coefficients determined by an impulse response of a transmission path.
摘要翻译： 一种分数间隔的交叉极化干扰消除器，其中通过以传输数据频率的整数倍的频率工作的自适应滤波器产生补偿信号。 交叉极化干扰消除器包括用于产生用于控制整数倍频率的自适应滤波器的系数的误差信号的机构。 该机制例如通过使用波形发生器来实现，该波形发生器使用传输数据的多个估计和由传输路径的脉冲响应确定的系数来生成整数倍频率的基带信号的估计。
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