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。

公开(公告)号：US11777457B2

公开(公告)日：2023-10-03

申请号：US17559879

申请日：2021-12-22

Applicant: APPLE INC.

Inventor： Andreas Langer ,  Christoph Hepp

IPC: H03F1/30 ,  H03F3/19 ,  H03F3/24 ,  H03F1/02 ,  H03G3/30 ,  H04B1/04

CPC classification number: H03F3/19 ,  H03F1/0216 ,  H03F1/0222 ,  H03F3/245 ,  H03G3/3042 ,  H03F2200/105 ,  H03F2200/336 ,  H03F2200/36 ,  H03F2200/451 ,  H03G2201/302 ,  H03G2201/307 ,  H04B1/04

Abstract: A circuit for generating a radio frequency signal is provided. The circuit includes an amplifier configured to generate a radio frequency signal based on a baseband signal. Further, the circuit includes a power supply configured to generate a variable supply voltage based on a control signal indicating a desired supply voltage, and to supply the variable supply voltage to the amplifier. The circuit further includes an envelope tracking circuit configured to generate the control signal based on a bandwidth of the baseband signal, and to supply the control signal to the power supply.

公开(公告)号：US09923532B2

公开(公告)日：2018-03-20

申请号：US15480097

申请日：2017-04-05

Applicant: NXP USA, Inc.

Inventor： Cristian Pavao-Moreira ,  Rex Kenton Hales

IPC: H03G3/30 ,  H03F3/19 ,  H03F3/45 ,  H03F3/72 ,  G01S13/02

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：US07496163B2

公开(公告)日：2009-02-24

申请号：US11007159

申请日：2004-12-09

Applicant: Kenji Terao

Inventor： Kenji Terao

IPC: H04L27/08

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（t1至t4）每次都被移位以分散并减小归因于伴随AGC增益更新的直接转换特有的直流分量的噪声的影响。 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：US07403757B2

公开(公告)日：2008-07-22

申请号：US11223067

申请日：2005-09-08

Applicant: Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

Inventor： Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

IPC: H04B1/06

CPC classification number: H03G3/30 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302

Abstract: The present invention relates to an automatic gain controller in a wireless packet communication system and an automatic gain control method thereof. The automatic gain controller includes a variable gain amplifier, a signal saturation determining unit, a power calculator, and a gain controller. The gain controller includes a first gain selector and a second gain selector. In the automatic gain control method, an establishment gain of a variable gain amplifier is reduced when the number of samples greater than a predetermined reference is greater than a predetermined number. After a received power value is measured, the establishment gain is controlled by a difference between the received power value and a reference power value.

Abstract translation: 本发明涉及一种无线分组通信系统中的自动增益控制器及其自动增益控制方法。 自动增益控制器包括可变增益放大器，信号饱和确定单元，功率计算器和增益控制器。 增益控制器包括第一增益选择器和第二增益选择器。 在自动增益控制方法中，当大于预定参考值的采样数大于预定数量时，减小可变增益放大器的建立增益。 在测量接收功率值之后，通过接收功率值和参考功率值之间的差来控制建立增益。

公开(公告)号：US20060121867A1

公开(公告)日：2006-06-08

申请号：US11223067

申请日：2005-09-08

Applicant: Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

Inventor： Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

IPC: H04B1/06

CPC classification number: H03G3/30 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302

Abstract: The present invention relates to an automatic gain controller in a wireless packet communication system and an automatic gain control method thereof. The automatic gain controller includes a variable gain amplifier, a signal saturation determining unit, a power calculator, and a gain controller. The gain controller includes a first gain selector and a second gain selector. In the automatic gain control method, an establishment gain of a variable gain amplifier is reduced when the number of samples greater than a predetermined reference is greater than a predetermined number. After a received power value is measured, the establishment gain is controlled by a difference between the received power value and a reference power value.

Abstract translation: 本发明涉及一种无线分组通信系统中的自动增益控制器及其自动增益控制方法。 自动增益控制器包括可变增益放大器，信号饱和确定单元，功率计算器和增益控制器。 增益控制器包括第一增益选择器和第二增益选择器。 在自动增益控制方法中，当大于预定参考值的采样数大于预定数量时，减小可变增益放大器的建立增益。 在测量接收功率值之后，通过接收功率值和参考功率值之间的差来控制建立增益。