公开(公告)号：US20170294889A1

公开(公告)日：2017-10-12

申请号：US15480097

申请日：2017-04-05

Applicant: NXP USA, Inc.

Inventor： Cristian Pavao-Moreira ,  Rex Kenton Hales

IPC: H03G3/30 ,  H03F3/45 ,  H03F3/72 ,  H03F3/19

CPC classification number: H03G3/3036 ,  G01S13/0209 ,  H03F3/19 ,  H03F3/45094 ,  H03F3/72 ,  H03F2200/384 ,  H03F2200/411 ,  H03F2200/456 ,  H03F2200/69 ,  H03F2203/45061 ,  H03F2203/45081 ,  H03F2203/45112 ,  H03F2203/7221 ,  H03G3/3052 ,  H03G2201/302 ,  H03G2201/40 ,  H03K19/018585

Abstract: A device includes a variable gain amplifier, a voltage shifter, a variable gain amplifier half replica module, and an analog to digital converter. The variable gain amplifier includes an input terminal to receive an input signal, an output terminal to provide a first output signal that is biased based on a first common-mode voltage reference. The voltage shifter circuit includes first and second input terminals, and an output terminal to provide, to the analog to digital converter, a third output signal that is biased based on a second common-mode voltage reference. The variable gain amplifier half replica module includes an output terminal coupled to the second input terminal of the voltage shifter circuit, the variable gain amplifier half replica module to control the third output signal of the voltage shifter circuit based on the first common-mode voltage reference and the second common-mode voltage reference.

公开(公告)号：US08559903B2

公开(公告)日：2013-10-15

申请号：US13299581

申请日：2011-11-18

Applicant: Henk Ten Pierick ,  Gertjan Groot Hulze ,  Erik Keukens

Inventor： Henk Ten Pierick ,  Gertjan Groot Hulze ,  Erik Keukens

IPC: H04B1/06 ,  H04B7/00

CPC classification number: H03G3/3052 ,  H03G3/301 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/606

Abstract: An automatic gain control circuit is provided for an input signal in the form of a dc reference level and a superposed amplitude modulated ac data signal. A feedforward AGC loop has a low pass filter for deriving the level of attenuation from the attenuated dc reference level. A multiplier value (G) is based on the reciprocal of the level of attenuation (α) and this multiplier enables an output signal to be generated comprising a constant multiple (DG) of the input signal.

Abstract translation: 为直流基准电平和重叠幅度调制交流数据信号形式的输入信号提供自动增益控制电路。 前馈AGC环路具有用于从衰减的直流参考电平导出衰减电平的低通滤波器。 乘数值（G）基于衰减电平（α）的倒数，并且该乘法器使得能够产生包括输入信号的恒定倍数（DG）的输出信号。

公开(公告)号：US08050367B2

公开(公告)日：2011-11-01

申请号：US12066877

申请日：2006-09-14

Applicant: Masaki Ichihara

Inventor： Masaki Ichihara

IPC: H04L27/08

CPC classification number: H03G3/3089 ,  H03G3/001 ,  H03G3/3052 ,  H03G2201/302 ,  H04B1/30

Abstract: Input average levels and output average levels of digital channel filters 217 and 218 are computed in amplitude calculation circuits 101 and 102. In a gain difference calculation circuit 103, a gain difference of the input levels and the output levels is computed as a multiplier α so that a difference between the input levels and the output levels are eliminated or adjusted to be within a certain value. The outputs of the digital channel filters 217 and 218 are multiplied by the multiplier α in multiplier units 104 and 105. The multiplication results are outputted as corrected digital signals to a subsequent digital signal processing circuit.

Abstract translation: 在幅度计算电路101和102中计算数字通道滤波器217和218的输入平均电平和输出平均电平。在增益差计算电路103中，输入电平和输出电平的增益差被计算为乘数α，因此 输入电平和输出电平之间的差异被消除或调整到一定值之内。 数字信道滤波器217和218的输出在乘法器单元104和105中乘以乘法器α。乘法结果作为经校正的数字信号输出到随后的数字信号处理电路。

公开(公告)号：US20050129150A1

公开(公告)日：2005-06-16

申请号：US11007159

申请日：2004-12-09

Applicant: Kenji Terao

Inventor： Kenji Terao

IPC: H03G3/20 ,  H03G3/30 ,  H04B1/16 ,  H04B1/30 ,  H04B1/707 ,  H04B1/7097 ,  H03D1/00

CPC classification number: H03G3/3078 ,  H03G3/3068 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307

Abstract: In a slot format of a received signal, AGC gain update timings (t1 to t4) are shifted every time to disperse and reduce an influence of a noise attributable to a direct current component specific to direct conversion which is accompanied by AGC gain update. In particular, in the case where each of slots in the received signal includes an information portion (data) having a larger code correcting capability and an information portion having a smaller code correcting capability (TPC (transmission power control), TFCI (transport format combination indicator), PILOT), the AGC gain update timing is generated while being shifted in the former information portion, thereby reduce the influence of the noise. When the amount of shift of the AGC gain update timing is set to be larger than that of one symbol of the received signal, the influence of the noise accompanied by the AGC gain update is further reduced.

Abstract translation: 在接收信号的时隙格式中，AGC增益更新定时（t 1至t 4）每次都被移位以分散并减小归因于直接转换的特定于直流转换的直流分量的噪声的影响，伴随着AGC增益更新 。 特别地，在接收信号中的每个时隙包括具有较大代码校正能力的信息部分（数据）和具有较小代码校正能力的信息部分（TPC（传输功率控制）），TFCI（传输格式组合 指示器），PILOT）时，在前一个信息部分中移动时产生AGC增益更新定时，从而减少噪声的影响。 当AGC增益更新定时的移位量被设置为大于接收信号的一个符号的移位量时，进一步降低伴随AGC增益更新的噪声的影响。

公开(公告)号：US20040162104A1

公开(公告)日：2004-08-19

申请号：US10713613

申请日：2003-11-14

Applicant: InterDigital Technology Corporation

Inventor： Fatih Ozluturk ,  Leonid Kazakevich ,  Kenneth P. Kearney ,  Geetha Lakshmi Narayan ,  Alpaslan Demir ,  Tanbir Haque

IPC: H04B001/40 ,  H04B017/00 ,  H04B001/06 ,  H04B007/00

CPC classification number: H03G3/001 ,  H03D3/008 ,  H03D3/009 ,  H03G3/3068 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307 ,  H03G2201/508 ,  H04B1/30 ,  H04L2027/0016 ,  H04L2027/0024

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component tolerances of an analog radio, a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing (DSP) techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (AGC) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency (RF) parameters.

Abstract translation: 为了补偿由模拟无线电的低成本模拟无线电组件公差引起的性能下降，未来的系统架构（FSA）无线通信收发器采用多种数字信号处理（DSP）技术来补偿这种模拟组件的缺陷， 现代规格可能放宽。 在数字域中提供自动增益控制（AGC）功能，以提供增强的相位和幅度补偿以及许多其他射频（RF）参数。

公开(公告)号：US20090285340A1

公开(公告)日：2009-11-19

申请号：US12066877

申请日：2006-09-14

Applicant: Masaki Ichihara

Inventor： Masaki Ichihara

IPC: H04L27/08

CPC classification number: H03G3/3089 ,  H03G3/001 ,  H03G3/3052 ,  H03G2201/302 ,  H04B1/30

Abstract: Input average levels and output average levels of digital channel filters 217 and 218 are computed in amplitude calculation circuits 101 and 102. In a gain difference calculation circuit 103, a gain difference of the input levels and the output levels is computed as a multiplier α so that a difference between the input levels and the output levels are eliminated or adjusted to be within a certain value. The outputs of the digital channel filters 217 and 218 are multiplied by the multiplier α in multiplier units 104 and 105. The multiplication results are outputted as corrected digital signals to a subsequent digital signal processing circuit.

Abstract translation: 在幅度计算电路101和102中计算数字信道滤波器217和218的输入平均电平和输出平均电平。在增益差计算电路103中，输入电平和输出电平的增益差被计算为乘数α 输入电平和输出电平之间的差异被消除或调整到一定值之内。 数字通道滤波器217和218的输出乘以乘法器单元104和105中的乘法器α。乘法结果作为经校正的数字信号输出到随后的数字信号处理电路。

公开(公告)号：US07460623B1

公开(公告)日：2008-12-02

申请号：US10360834

申请日：2003-02-06

Applicant: Vladimir Radionov ,  Ryan Yu

Inventor： Vladimir Radionov ,  Ryan Yu

IPC: H04L27/08

CPC classification number: H03G3/3089 ,  H03G2201/202 ,  H03G2201/302

Abstract: A digital automatic gain control circuit is disclosed. The circuit includes a selector, a scaler, a detector, a gain adjustor and a controller. In one exemplary aspect, the selector receives an input signal having two components, namely, the in-phase (I) and quadrature (Q) components, in digital form. The selector then selects a subset of bits from each component based on a control signal provided by the controller. The two subsets are then forwarded to the scaler. The scaler then multiplies the two subsets respectively against a gain value to generate two multiplication results. A portion of each multiplication result is then provided as output by the scaler. The gain value and the subset selection are periodically adjusted in response to the scaler output. The adjustments with respect to the gain value and the subset selection are effectuated collectively by the detector, the gain adjustor and the controller.

Abstract translation: 公开了一种数字自动增益控制电路。 该电路包括选择器，定标器，检测器，增益调节器和控制器。 在一个示例性方面，选择器以数字形式接收具有两个分量的输入信号，即同相（I）和正交（Q）分量。 然后，选择器基于由控制器提供的控制信号从每个分量中选择一个比特的子集。 然后将两个子集转发到缩放器。 缩放器然后将两个子集分别乘以增益值以生成两个相乘结果。 然后将每个乘法结果的一部分作为缩放器的输出提供。 响应于缩放器输出周期性地调整增益值和子集选择。 相对于增益值和子集选择的调整由检测器，增益调节器和控制器共同实现。

公开(公告)号：US20070230635A1

公开(公告)日：2007-10-04

申请号：US11278527

申请日：2006-04-03

Applicant: Leif Wilhelmsson ,  Jim Svensson ,  Lars Sundstrom

Inventor： Leif Wilhelmsson ,  Jim Svensson ,  Lars Sundstrom

IPC: H04L27/08 ,  H04K1/10

CPC classification number: H04L27/2647 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H04L25/0202 ,  H04L27/2607

Abstract: In communication systems where the channel is expected to vary during a communication burst, gain adjustments during the communication burst can be implemented by automatic gain control (AGC) in the receiver, with minimal performance degradation. These gain adjustments are successfully accommodated by virtue of suitable information-sharing between an AGC unit and a digital baseband part. The digital baseband part can direct the AGC unit appropriately to ensure that gain adjustments are implemented during time intervals that do not carry substantive communication information (e.g., guard intervals). In receivers that perform channel estimation in the digital baseband part, the AGC unit supports channel estimation by informing the digital baseband part about the timing of the gain adjustment. The AGC unit can also support channel estimation by informing the digital baseband part about the size of the gain adjustment.

Abstract translation: 在通信期望信道在通信突发期间变化的通信系统中，通信突发期间的增益调整可以通过接收机中的自动增益控制（AGC）来实现，性能下降最小。 通过AGC单元和数字基带部分之间的合适的信息共享，可以成功地适应这些增益调整。 数字基带部分可以适当地引导AGC单元，以确保在不携带实质性通信信息（例如，保护间隔）的时间间隔期间实现增益调整。 在数字基带部分进行信道估计的接收机中，AGC单元通过向数字基带部分通知增益调整的定时来支持信道估计。 AGC单元还可以通过向数字基带部分通知增益调整的大小来支持信道估计。

公开(公告)号：US07257379B2

公开(公告)日：2007-08-14

申请号：US10713613

申请日：2003-11-14

Applicant: Fatih Ozluturk ,  Leonid Kazakevich ,  Kenneth P. Kearney ,  Geetha Lakshmi Narayan ,  Alpaslan Demir ,  Tanbir Haque

Inventor： Fatih Ozluturk ,  Leonid Kazakevich ,  Kenneth P. Kearney ,  Geetha Lakshmi Narayan ,  Alpaslan Demir ,  Tanbir Haque

IPC: H04B1/38

CPC classification number: H03G3/001 ,  H03D3/008 ,  H03D3/009 ,  H03G3/3068 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307 ,  H03G2201/508 ,  H04B1/30 ,  H04L2027/0016 ,  H04L2027/0024

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component tolerances of an analog radio, a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing (DSP) techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (AGC) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency (RF) parameters.

Abstract translation: 为了补偿由模拟无线电的低成本模拟无线电组件公差引起的性能下降，未来的系统架构（FSA）无线通信收发器采用多种数字信号处理（DSP）技术来补偿这种模拟组件的缺陷， 现代规格可能放宽。 在数字域中提供自动增益控制（AGC）功能，以提供增强的相位和幅度补偿以及许多其他射频（RF）参数。

公开(公告)号：US20040259511A1

公开(公告)日：2004-12-23

申请号：US10864193

申请日：2004-06-09

Inventor： Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

IPC: H03M001/10

CPC classification number: H03G3/3052 ,  H03G2201/206 ,  H03G2201/302 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/502 ,  H03G2201/508 ,  H03M1/185 ,  H04B7/0814

Abstract: The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.

Abstract translation: 本发明提供一种在无线电通信系统的接收机中使用的自动增益控制和天线选择方法。 接收到的信号功率通过系统中模数转换后的数字信号处理来估计，以便调整前端模拟信号的增益，直到模拟信号的幅度被调整到数字信号的最佳范围 处理。 此外，ADC用于估计信号功率作为天线选择的基础。