公开(公告)号：US20110149773A1

公开(公告)日：2011-06-23

申请号：US12969272

申请日：2010-12-15

申请人： Il-Gu Lee ,  Sok-Kyu Lee

发明人： Il-Gu Lee ,  Sok-Kyu Lee

IPC分类号： H04W24/00

CPC分类号： H03G3/3078 ,  H04B17/327 ,  H04B17/345

摘要： Provided are method and apparatus for receiving data in a wireless communication system. The method includes receiving data through one antenna or a plurality of reception antennas; measuring received signal power levels and a noise power level from the received data; calculating a gain control value of an automatic gain control process; compensating the measured received signal power levels based on the calculated gain compensation value; calculating a predetermined ratio based on the compensated received signal power levels and the noise power level; and restoring the received data using the calculated predetermined ratio.

摘要翻译： 提供了一种用于在无线通信系统中接收数据的方法和装置。 该方法包括通过一个天线或多个接收天线接收数据; 从接收到的数据测量接收信号功率电平和噪声功率电平; 计算自动增益控制处理的增益控制值; 基于所计算的增益补偿值补偿测量的接收信号功率电平; 基于补偿的接收信号功率电平和噪声功率电平计算预定比率; 以及使用所计算的预定比率恢复所接收的数据。

公开(公告)号：US07933568B2

公开(公告)日：2011-04-26

申请号：US11752754

申请日：2007-05-23

申请人： Ahmadreza Rofougaran ,  Maryam Rofougaran

发明人： Ahmadreza Rofougaran ,  Maryam Rofougaran

IPC分类号： H04B1/04 ,  H04K3/00

CPC分类号： H03F3/211 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/129 ,  H03F2200/156 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/7236 ,  H03G3/3068 ,  H03G3/3078

摘要： Aspects of a method and system for mitigating receiver saturation during simultaneous FM transmission and reception may include detecting a power of an RF signal received at an antenna. A power of one or more baseband signal components corresponding to the RF signal may be determined. A power of signals transmitted via the antenna may be controlled, based on a cost function derived from at least the detected RF signal power received and/or the determined power of the one or more baseband signal components. One or more of the baseband signal components may be an in-phase signal, a quadrature signal or both an in-phase signal and a quadrature signal associated with a same carrier frequency. In one embodiment of the invention, the radio frequency signal may be an intermediate frequency (IF) radio signal.

摘要翻译： 在同时进行FM发送和接收期间减轻接收机饱和的方法和系统的方面可以包括检测在天线处接收到的RF信号的功率。 可以确定与RF信号对应的一个或多个基带信号分量的功率。 可以基于从至少所接收到的检测到的RF信号功率和/或所确定的一个或多个基带信号分量的功率导出的成本函数来控制经由天线发送的信号的功率。 一个或多个基带信号分量可以是同相信号，正交信号，或同相信号和与相同载波频率相关的正交信号。 在本发明的一个实施例中，射频信号可以是中频（IF）无线电信号。

公开(公告)号：US20110035647A1

公开(公告)日：2011-02-10

申请号：US12862636

申请日：2010-08-24

申请人： Donald Brian Eidson ,  Arndt Joseph Mueller ,  Joseph B. Soriaga ,  Itzhak Gurantz

发明人： Donald Brian Eidson ,  Arndt Joseph Mueller ,  Joseph B. Soriaga ,  Itzhak Gurantz

IPC分类号： H03M13/45 ,  G06F11/10 ,  H04B17/00

CPC分类号： H03G3/3078 ,  H03G3/3068

摘要： Multiple channels of received data are processed by a multiple channel demodulation and error correction decoding engine. The statistical uncertainty of processing channels with an iterative decoder are averaged across all the channels to reduce the total processing power required of the decoding engine compared to processing each channel with a separate engine. A set of input buffers holds blocks of data for each channel needing decoding. A quality measure is computed on each input block to set the priority and iteration allocation of decoding in the common decoder. The input RF signal is digitized by a broadband tuner that processes some or all of the channels to feed the multiple channel demodulator and decoder. Multiple decoded video data streams are output.

摘要翻译： 多信道的接收数据由多信道解调和纠错解码引擎处理。 使用迭代解码器的处理通道的统计不确定性在所有通道上被平均，以减少与使用单独的引擎处理每个通道相比，解码引擎所需的总处理能力。 一组输入缓冲器保存需要解码的每个通道的数据块。 在每个输入块上计算质量度量，以在公共解码器中设置解码的优先级和迭代分配。 输入RF信号由处理部分或全部信道的宽带调谐器数字化，以馈送多信道解调器和解码器。 输出多个解码视频数据流。

公开(公告)号：US20100321114A1

公开(公告)日：2010-12-23

申请号：US12918419

申请日：2009-02-24

申请人： Eiji Okada ,  Daisuke Nishimura ,  Hiroaki Ozeki ,  Noriaki Saito ,  Susumu Fukushima

发明人： Eiji Okada ,  Daisuke Nishimura ,  Hiroaki Ozeki ,  Noriaki Saito ,  Susumu Fukushima

IPC分类号： H03G3/30

CPC分类号： H03G3/3068 ,  H03G3/3078

摘要： An amplifier circuit includes a variable gain amplifier that amplifies and outputs a signal from an output port, a controller operable to change an gain of the variable gain amplifier, a mixer that mixes the signal output from the output port of the variable gain amplifier with a local oscillating signal to heterodyne the signal and outputs the heterodyned signal, a filter that outputs a signal component having a predetermined frequency out of the signal output from the mixer, and a detector that detects a power level based on power of the signal output from the filter. The controller is operable to change the gain according to the first power level such that a quality level representing quality of the signal output from the filter becomes a target quality level immediately after the gain is changed. The amplifier circuit can have small power consumption.

摘要翻译： 放大器电路包括放大并输出来自输出端口的信号的可变增益放大器，可操作以改变可变增益放大器的增益的控制器，将从可变增益放大器的输出端口输出的信号与 本地振荡信号外差信号并输出​​外差信号;滤波器，其输出从混频器输出的信号中具有预定频率的信号分量;以及检测器，其基于从所述混频器输出的信号的功率来检测功率电平 过滤。 控制器可操作以根据第一功率电平改变增益，使得表示从滤波器输出的信号的质量的质量水平在增益改变之后立即成为目标质量水平。 放大器电路可以具有较小的功耗。

公开(公告)号：US07853229B2

公开(公告)日：2010-12-14

申请号：US11890858

申请日：2007-08-08

申请人： Prabir C. Maulik ,  Steven Rose ,  Donald Paterson ,  Hassan L'Bahy ,  Nazmy Abaskharoun

发明人： Prabir C. Maulik ,  Steven Rose ,  Donald Paterson ,  Hassan L'Bahy ,  Nazmy Abaskharoun

IPC分类号： H04B7/00

CPC分类号： H03G3/3068 ,  H03G3/3078

摘要： In one aspect, a calibration component configured to calibrate an automatic gain controller (AGC) for use in a tuner configured to isolate a selected channel from a multi-channel broadcast signal, the tuner implemented substantially on two chips, a first chip comprising a radio frequency (RF) integrated circuit adapted for RF processing and a second chip comprising a digital integrated circuit adapted for digital processing is provided. The calibration component comprises a calibration signal generator implemented on the RF integrated circuit, the calibration signal generator adapted to generate a generally known calibration signal, a power detector implemented on the RF integrated circuit and configured to detect, during calibration, at least one power characteristic of the calibration signal and to provide a power level signal indicative of the at least one detected power characteristic, a gain controller implemented on the digital integrated circuit, the gain controller adapted to generate at least one error signal based, at least in part, on a comparison between the power level signal provided by the power detector and a first reference signal, an offset signal generator implemented on the RF integrated circuit and configured to generate an offset signal based, at least in part, on the at least one error signal and a summing element implemented on the RF integrated circuit and adapted to combine the offset signal with the power level signal provided by the power detector to provide an adjusted power level signal.

摘要翻译： 一方面，一种校准组件，被配置为校准用于调谐器的自动增益控制器（AGC），所述调谐器被配置为将所选择的频道与多声道广播信号隔离，所述调谐器基本上在两个码片上实现，第一芯片包括无线电 提供了适用于RF处理的频率（RF）集成电路和包括适于数字处理的数字集成电路的第二芯片。 校准组件包括在RF集成电路上实现的校准信号发生器，校准信号发生器适于产生通常已知的校准信号，在RF集成电路上实现的功率检测器，其被配置为在校准期间检测至少一个功率特性 并且提供指示所述至少一个检测到的功率特性的功率电平信号，在所述数字集成电路上实现的增益控制器，所述增益控制器适于至少部分地基于所述增益控制器产生至少一个误差信号，所述增益控制器至少部分地基于 由功率检测器提供的功率电平信号和第一参考信号之间的比较，在RF集成电路上实现的并被配置为至少部分地基于至少一个误差信号产生偏移信号的偏移信号发生器，以及 在RF集成电路上实现的并且适于组合偏移信号的求和元件 与功率检测器提供的功率电平信号提供调整的功率电平信号。

公开(公告)号：US20100303180A1

公开(公告)日：2010-12-02

申请号：US12854036

申请日：2010-08-10

申请人： Wei XIONG

发明人： Wei XIONG

IPC分类号： H04L27/08

CPC分类号： H03G3/3068 ,  H03G3/001 ,  H03G3/3078 ,  H04L27/2647 ,  H04L27/3809

摘要： A receiver in an OFDM communication system includes a power detector and a gain controller. The power detector detects for total received power of a received OFDM signal, e.g., by computing the power of the data samples from an ADC and averaging the power. The gain controller adjusts the gain of the receiver in discrete gain steps and in one direction, e.g., from the lowest gain state to the highest gain state, based on the detected total received power. The gain controller initializes the receiver to the lowest gain state. Thereafter, the gain controller detects for low total received power, e.g., by comparing the detected total received power against a predetermined threshold. The gain controller transitions to a higher gain state if low total received power is detected and maintains the current gain state otherwise.

摘要翻译： OFDM通信系统中的接收机包括功率检测器和增益控制器。 功率检测器例如通过从ADC计算数据样本的功率并对功率求平均，来检测接收到的OFDM信号的总接收功率。 增益控制器基于检测到的总接收功率，以离散增益步长和一个方向（例如，从最低增益状态到最高增益状态）来调整接收机的增益。 增益控制器将接收器初始化为最低增益状态。 此后，增益控制器例如通过将检测到的总接收功率与预定阈值进行比较来检测低总接收功率。 如果检测到低的总接收功率，则增益控制器转换到更高的增益状态，否则保持当前的增益状态。

公开(公告)号：US07830991B2

公开(公告)日：2010-11-09

申请号：US11243289

申请日：2005-10-03

申请人： John F. Dishman ,  Edward R. Beadle

发明人： John F. Dishman ,  Edward R. Beadle

IPC分类号： H04L27/08

CPC分类号： H03G3/3078 ,  H03G3/3089 ,  H04B1/715 ,  H04B2001/7152

摘要： A digital signal processing-based receiver architecture performs automatic gain control (AGC) for a frequency hopping spread-spectrum communications receiver that may be subjected to one or more sources of interference or jamming. Rather than set the AGC gain at a fixed, best hoped for value, and then attempt to rely on decoding or interleaving to interpolate lost or degraded data, the present invention, through repeated but aperiodic transitions or hops across a plurality of frequency bins of interest, develops a gain profile for the plurality of frequency bins, and uses the gain profile to adjust, on a hop-by-hop basis, the gain for the channel/bin to which the receiver is listening, so as to maintain the average aggregate input signal power at an optimal ADC loading factor.

摘要翻译： 基于数字信号处理的接收机架构对可能经受一个或多个干扰源或干扰源的跳频扩频通信接收机执行自动增益控制（AGC）。 而不是将AGC增益设置为固定的，最好希望的值，然后尝试依靠解码或交织来内插丢失或降级的数据，本发明通过跨越感兴趣的多个频率频段的重复但不定期的转换或跳 开发多个频率仓的增益曲线，并且使用增益曲线来逐个地调整接收机正在收听的频道/频道的增益，以便维持平均总和 输入信号功率在最佳ADC负载因子。

公开(公告)号：US20100261447A1

公开(公告)日：2010-10-14

申请号：US12420059

申请日：2009-04-08

申请人： Shih-Chuan Lu

发明人： Shih-Chuan Lu

IPC分类号： H04B1/06

CPC分类号： H03G3/3068 ,  H03G3/3078 ,  H04B1/26

摘要： An automatic gain control apparatus includes a first comparing module, a counting module, a second comparing module, and a control module. The first comparing module compares an input signal with a first threshold level and a second threshold level to generate a first compared output signal and a second compared output signal respectively. The counting module performs counting operations upon the first compared output signal and the second compared output signal to generate a first counting number and a second counting number respectively. The second comparing module compares the first counting number with a first threshold number to generate a first detection signal and compares the second counting number with a second threshold number to generate a second detection signal. The control module controls the gain of a radio frequency amplifier or an intermediate frequency amplifier according to the first detection signal and the second detection signal.

摘要翻译： 一种自动增益控制装置，包括第一比较模块，计数模块，第二比较模块和控制模块。 第一比较模块将输入信号与第一阈值电平和第二阈值电平进行比较，分别产生第一比较输出信号和第二比较输出信号。 计数模块对第一比较输出信号和第二比较输出信号执行计数操作，分别产生第一计数号和第二计数号。 第二比较模块将第一计数数与第一阈值进行比较以产生第一检测信号，并将第二计数数与第二阈值进行比较以产生第二检测信号。 控制模块根据第一检测信号和第二检测信号来控制射频放大器或中频放大器的增益。

公开(公告)号：US20100190459A1

公开(公告)日：2010-07-29

申请号：US12359595

申请日：2009-01-26

申请人： Junyi Li ,  Ying Wang ,  Thomas Richardson ,  Aleksandar Jovicic

发明人： Junyi Li ,  Ying Wang ,  Thomas Richardson ,  Aleksandar Jovicic

IPC分类号： H04B1/06

CPC分类号： H03G3/3078 ,  H03G3/3089 ,  H04W52/383 ,  H04W52/52

摘要： Techniques for performing automatic gain control (AGC) at a terminal in a wireless communication network are described. In an aspect, the terminal may use different receiver gain settings to receive different types of signals in different time intervals. The terminal may determine a receiver gain setting for each signal type and may use the receiver gain setting to receive signals of that signal type. In another aspect, the terminal may determine a receiver gain setting for a future time interval based on received power levels for peer terminals expected to transmit in that time interval. The terminal may measure received power levels of signals received from a plurality of terminals. The terminal may determine a set of terminals expected to transmit in the future time interval and may determine the receiver gain setting for the future time interval based on the measured received power levels for the set of terminals.

摘要翻译： 描述了在无线通信网络中的终端处执行自动增益控制（AGC）的技术。 在一方面，终端可以使用不同的接收机增益设置来以不同的时间间隔接收不同类型的信号。 终端可以确定每个信号类型的接收机增益设置，并且可以使用接收机增益设置来接收该信号类型的信号。 在另一方面，终端可以基于期望在该时间间隔中发送的对等终端的接收功率电平来确定未来时间间隔的接收机增益设置。 终端可以测量从多个终端接收的信号的接收功率电平。 终端可以确定期望在未来时间间隔中发送的一组终端，并且可以基于所测量的终端集合的接收功率电平来确定未来时间间隔的接收机增益设置。

公开(公告)号：US07746966B2

公开(公告)日：2010-06-29

申请号：US11791442

申请日：2005-06-24

申请人： Yong-Su Lee ,  Youn-Ok Park ,  Jun-Woo Kim ,  Young-Jo Bang

发明人： Yong-Su Lee ,  Youn-Ok Park ,  Jun-Woo Kim ,  Young-Jo Bang

IPC分类号： H04L27/08

CPC分类号： H03G3/3078 ,  H04L27/2647 ,  H04L27/2662

摘要： The present invention relates to a method for automatic gain control (AGC) before an initial synchronization of a mobile station modem in OFDM system, and an apparatus thereof. The AGC apparatus includes: an initial synchronization inspector that verifies whether an initial synchronization for an input block sample (k) signal has been performed; a frame divider that divides a frame into predetermined intervals B(k) for the input block sample(k) signal in the case that the initial synchronization has not been performed; a reference value inspector that compares a difference value Pref−Pcalc, between a predetermined reference value Pref and sample data average energy Pcalc, with a predetermined value; a count controller that increases or decreases the count when the difference value Pref−Pcalc compared by the reference value inspector is greater or less than the predetermined value; a count inspector that inspects whether the count is greater or less than 0 when the input block sample (k) reaches a maximum value MAX; and a gain controller which increases or decreases the gain, level by level, according to the count inspection result of the count inspector.

摘要翻译： 本发明涉及OFDM系统中的移动台调制解调器的初始同步之前的自动增益控制（AGC）的方法及其装置。 AGC装置包括：初始同步检查器，其验证是否已经执行了输入块样本（k）信号的初始同步; 在没有执行初始同步的情况下，对于输入块样本（k）信号将帧划分成预定间隔B（k）的帧分割器; 参考值检查器，将预定参考值Pref和采样数据平均能量Pcalc之间的差值Pref-Pcalc与预定值进行比较; 当由参考值检查器比较的差值Pref-Pcalc大于或小于预定值时增加或减少计数的计数控制器; 当输入块样本（k）达到最大值MAX时，检查计数是否大于或小于0的计数检查器; 以及根据计数检查员的计数检查结果逐级增加或减少增益的增益控制器。