公开(公告)号：US08874051B2

公开(公告)日：2014-10-28

申请号：US13310434

申请日：2011-12-02

申请人： Dmitriy Rozenblit ,  Masoud Kahrizi ,  Jaleh Komaili ,  Rajasekhar Pullela ,  Shahrzad Tadjpour

发明人： Dmitriy Rozenblit ,  Masoud Kahrizi ,  Jaleh Komaili ,  Rajasekhar Pullela ,  Shahrzad Tadjpour

IPC分类号： H04B1/04 ,  H03G3/30

CPC分类号： H04L1/0033 ,  H03F1/0211 ,  H03F3/19 ,  H03F3/195 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/451 ,  H03F2200/465 ,  H03G3/3042

摘要： A transmitter adjusts a transmitted power level by modifying a control input of a variable gain amplifier. A power amplifier control system includes an envelope extractor, an error extractor, and a feed-forward multiplier. The envelope extractor receives data signal inputs and computes the envelope of the combined signal. The error extractor generates an error signal as a function of the combined signal and the output power generated by the power amplifier. The feed-forward multiplier generates a modified error signal that is responsive to a function of the gain in a feedback path. A corresponding method for controlling a power level is also disclosed. In some embodiments, a transmit chain with a power control loop is used to adjust the transmit signal power applied at an input of a variable gain amplifier. A corresponding method for adjusting the transmit signal power level is also included.

摘要翻译： 发射机通过修改可变增益放大器的控制输入来调整发射功率电平。 功率放大器控制系统包括信封提取器，误差提取器和前馈乘法器。 信封提取器接收数据信号输入并计算组合信号的包络。 误差提取器产生作为组合信号和功率放大器产生的输出功率的函数的误差信号。 前馈乘法器产生响应于反馈路径中的增益的函数的修改的误差信号。 还公开了一种用于控制功率电平的相应方法。 在一些实施例中，具有功率控制环路的发射链用于调整在可变增益放大器的输入处施加的发射信号功率。 还包括用于调整发射信号功率电平的相应方法。

公开(公告)号：US20080232268A1

公开(公告)日：2008-09-25

申请号：US12052991

申请日：2008-03-21

申请人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

发明人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

IPC分类号： H04J1/16

CPC分类号： H04B1/525 ,  H04B1/30

摘要： A transmit signal second-order inter-modulation (IM2) canceller for a portable handset using a full duplex mode of operation (e.g., WCDMA) is used to controllably reduce IM2 introduced by a transmit signal that appears in a received signal in a receive channel of the portable handset. The transmit signal IM2 canceller includes a delay estimator and a digital signal adjuster. The delay estimator receives a first input from a receive channel and a second input from a transmit channel. The delay estimator generates an estimate of the IM2 that the transmit channel introduces in the receive channel. The digital signal adjuster removes the estimate of the IM2 before forwarding a modified receive channel signal to a baseband subsystem of the portable handset.

摘要翻译： 使用用于使用全双工操作模式（例如，WCDMA）的便携式手持机的发射信号二阶互调制（IM 2）消除器可控制地减少出现在接收信号中的发射信号引入的IM 2 接收便携式手机的通道。 发送信号IM 2消除器包括延迟估计器和数字信号调节器。 延迟估计器从接收信道接收第一输入，并从发送信道接收第二输入。 延迟估计器产生发送信道在接收信道中引入的IM 2的估计。 在将修改的接收信道信号转发到便携式手持机的基带子系统之前，数字信号调节器去除IM 2的估计。

公开(公告)号：US20080059159A1

公开(公告)日：2008-03-06

申请号：US11932779

申请日：2007-10-31

申请人： Jaleh Komaili ,  Yongbing Wan

发明人： Jaleh Komaili ,  Yongbing Wan

IPC分类号： G10L19/12 ,  G10L21/00

CPC分类号： H04L1/0011 ,  G10L19/24 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0059 ,  H04W28/22 ,  H04W88/181 ,  Y10S370/914

摘要： The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission. The appropriate levels of channel coding necessary for reliable transmission are determined by various channel metrics, such as frame erase rate and bit error rate. The determination of the appropriate vocoder rate and level of channel coding for both the uplink and downlink may be determined centrally at the base station, with the vocoder rate and level of channel coding for the uplink being relayed to the mobile station. Alternatively, the appropriate vocoder rate and level of channel coding for the downlink may be determined by the mobile station, and the appropriate vocoder rate and level of channel coding for the uplink may be determined by the base station.

摘要翻译： 本发明包括具有基站和至少一个移动站的时分多址（TDMA）通信系统，每个移动站发送和接收携带数字编码语音的模拟射频信号。 使用声码器编码语音，该声码器以可变的编码速率对语音信号进行采样。 在射频信道遇到高信道干扰的期间，选择具有较低编码率的编码语音信道。 这种低速率编码语音与确保可靠传输所必需的高度信道编码相结合。 当射频信道正在经历低信道干扰水平时，需要较少的信道编码，并且使用具有较高编码率的声码器。 高速率编码语音与确保可靠传输所必需的较低信道编码相结合。 可靠传输所需的适当级别的信道编码由各种信道量度来确定，例如帧擦除率和误码率。 可以在基站中央确定适当的声码器速率和上行链路和下行链路的信道编码级别，其中声码器速率和上行链路的信道编码级别被中继到移动台。 或者，可以由移动台确定下行链路的适当的声码器速率和信道编码级别，并且可以由基站确定上行链路的适当的声码器速率和信道编码级别。

公开(公告)号：US20070116107A1

公开(公告)日：2007-05-24

申请号：US11566006

申请日：2006-12-01

申请人： Jaleh Komaili ,  Yongbing Wan

发明人： Jaleh Komaili ,  Yongbing Wan

IPC分类号： H03H7/30

CPC分类号： H04L1/0011 ,  G10L19/24 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0059 ,  H04W28/22 ,  H04W88/181 ,  Y10S370/914

摘要： The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission. The appropriate levels of channel coding necessary for reliable transmission are determined by various channel metrics, such as frame erase rate and bit error rate. The determination of the appropriate vocoder rate and level of channel coding for both the uplink and downlink may be determined centrally at the base station, with the vocoder rate and level of channel coding for the uplink being relayed to the mobile station. Alternatively, the appropriate vocoder rate and level of channel coding for the downlink may be determined by the mobile station, and the appropriate vocoder rate and level of channel coding for the uplink may be determined by the base station.

摘要翻译： 本发明包括具有基站和至少一个移动站的时分多址（TDMA）通信系统，每个移动站发送和接收携带数字编码语音的模拟射频信号。 使用声码器编码语音，该声码器以可变的编码速率对语音信号进行采样。 在射频信道遇到高信道干扰的期间，选择具有较低编码率的编码语音信道。 这种低速率编码语音与确保可靠传输所必需的高度信道编码相结合。 当射频信道正在经历低信道干扰水平时，需要较少的信道编码，并且使用具有较高编码率的声码器。 高速率编码语音与确保可靠传输所必需的较低信道编码相结合。 可靠传输所需的适当级别的信道编码由各种信道量度来确定，例如帧擦除率和误码率。 可以在基站中央确定适当的声码器速率和上行链路和下行链路的信道编码级别，其中声码器速率和上行链路的信道编码级别被中继到移动台。 或者，可以由移动台确定下行链路的适当的声码器速率和信道编码级别，并且可以由基站确定上行链路的适当的声码器速率和信道编码级别。

公开(公告)号：US20080051042A1

公开(公告)日：2008-02-28

申请号：US11510465

申请日：2006-08-25

申请人： Jaleh Komaili ,  John E. Vasa ,  Morten Damgaard ,  David S. Ripley

发明人： Jaleh Komaili ,  John E. Vasa ,  Morten Damgaard ,  David S. Ripley

IPC分类号： H04B1/04

CPC分类号： H04B1/0475 ,  H03F1/3241 ,  H03F1/3288 ,  H03F3/195 ,  H03F3/24 ,  H03F2201/3233 ,  H04B2001/0425

摘要： An adaptive predistortion system for controlling an open loop power amplifier includes a transmitter, a receiver, a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics, an amplitude resampling element configured to generate an updated AM-AM predistortion signal based on the output signal generated in the transmitter, and an amplitude predistortion element configured to compare the updated AM-AM predistortion signal with a factory-calibrated AM-AM predistortion signal and generate an amplitude compensation signal. The adaptive predistortion system also includes a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal, a phase resampling element configured to generate an updated AM-PM predistortion signal based on the output signal generated in the transmitter, and a phase predistortion element configured to compare the updated AM-PM predistortion signal with a factory-calibrated AM-PM predistortion signal and generate a phase compensation signal.

摘要翻译： 用于控制开环功率放大器的自适应预失真系统包括发射机，接收机，相位和幅度确定元件，其被配置为确定在发射机中产生的输出信号的幅度和相位特性，表示发射机特性的信号，幅度重采样元件 被配置为基于在所述发射机中产生的输出信号产生更新的AM-AM预失真信号，以及幅度预失真元件，其被配置为将所述更新的AM-AM预失真信号与出厂校准的AM-AM预失真信号进行比较，并产生振幅补偿 信号。 自适应预失真系统还包括相位比较元件，其被配置为将表示发射机特性的信号与期望的相位信号进行比较;相位重采样元件，被配置为基于在发射机中产生的输出信号生成更新的AM-PM预失真信号，以及 相位预失真元件，被配置为将更新的AM-PM预失真信号与出厂校准的AM-PM预失真信号进行比较，并产生相位补偿信号。

公开(公告)号：US06529730B1

公开(公告)日：2003-03-04

申请号：US09080013

申请日：1998-05-15

申请人： Jaleh Komaili ,  Yongbing Wan

发明人： Jaleh Komaili ,  Yongbing Wan

IPC分类号： H04Q720

CPC分类号： H04L1/0011 ,  G10L19/24 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0059 ,  H04W28/22 ,  H04W88/181 ,  Y10S370/914

摘要： The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission. The appropriate levels of channel coding necessary for reliable transmission are determined by various channel metrics, such as frame erase rate and bit error rate. The determination of the appropriate vocoder rate and level of channel coding for both the uplink and downlink may be determined centrally at the base station, with the vocoder rate and level of channel coding for the uplink being relayed to the mobile station. Alternatively, the appropriate vocoder rate and level of channel coding for the downlink may be determined by the mobile station, and the appropriate vocoder rate and level of channel coding for the uplink may be determined by the base station.

摘要翻译： 本发明包括具有基站和至少一个移动站的时分多址（TDMA）通信系统，每个移动站发送和接收携带数字编码语音的模拟射频信号。 使用声码器编码语音，该声码器以可变的编码速率对语音信号进行采样。 在射频信道遇到高信道干扰的期间，选择具有较低编码率的编码语音信道。 这种低速率编码语音与确保可靠传输所必需的高度信道编码相结合。 当射频信道正在经历低信道干扰水平时，需要较少的信道编码，并且使用具有较高编码率的声码器。 高速率编码语音与确保可靠传输所必需的较低信道编码相结合。 可靠传输所需的适当级别的信道编码由各种信道量度来确定，例如帧擦除率和误码率。 可以在基站中央确定适当的声码器速率和上行链路和下行链路的信道编码级别，其中声码器速率和上行链路的信道编码级别被中继到移动台。 或者，可以由移动台确定下行链路的适当的声码器速率和信道编码级别，并且可以由基站确定上行链路的适当的声码器速率和信道编码级别。

公开(公告)号：US06476677B1

公开(公告)日：2002-11-05

申请号：US09651801

申请日：2000-08-30

申请人： Jaleh Komaili ,  Ricke W. Clark

发明人： Jaleh Komaili ,  Ricke W. Clark

IPC分类号： H03G330

CPC分类号： H03F1/3241 ,  H03F1/34

摘要： A system for detecting and compensating for a saturation condition of a power amplifier where an error signal is produced by differencing a signal representative of or derived from a control signal for controlling the shape of the output of the power amplifier and a signal representative of or derived from the output of the power amplifier. An integrator integrates the error signal to produce a cumulative error signal. A detection circuit detects a saturation condition when the value of the cumulative error equals or exceeds a predetermined value determined during device calibration. Upon the detection of a saturation condition, a compensation circuit derives a compensation value by multiplying the value of the error signal at the time saturation is detected by a predetermined constant, and subtracts this value from the control signal. The input to the power amplifier is derived from the adjusted control signal.

摘要翻译： 一种用于检测和补偿功率放大器的饱和状态的系统，其中通过差分表示或来自控制信号的信号产生误差信号，用于控制功率放大器的输出的形状和表示或导出的信号 从功率放大器的输出。 积分器积分误差信号以产生累积误差信号。 当累积误差的值等于或超过在设备校准期间确定的预定值时，检测电路检测饱和状态。 在检测到饱和状态时，补偿电路通过将在检测到饱和时的误差信号的值相乘预定的常数而得到补偿值，并从控制信号中减去该值。 功率放大器的输入源自调整后的控制信号。

公开(公告)号：US06219345B1

公开(公告)日：2001-04-17

申请号：US09163640

申请日：1998-09-30

申请人： Ricke W. Clark ,  Jaleh Komaili

发明人： Ricke W. Clark ,  Jaleh Komaili

IPC分类号： H04B7212

CPC分类号： H04W56/0085 ,  H04B7/2671 ,  H04L7/042

摘要： The present invention discloses an improved system and method for increasing the timing accuracy of a time domain multiple access (TDMA) mobile communication system using a resource efficient parabolic interpolator. With the present invention, a mobile unit receives burst transmissions from a base station and a timing information is recovered therefrom. Since the timing information establishes the time of arrival of the burst, correlation initially identifies a coarse approximation of the location of the control signal within a defined portion of the burst signal and, together with two adjacent samples. Using a curve fitting technique, a precise position of the peak, relative to the coarse position, is determined. The equation can be solved ahead of time and values from the three samples substituted into a single expression for evaluation. Once the coefficients of the equation are known, the time offset of a refined peak relative to the coarse peak is readily calculated. The refined peak is then used in synchronizing transmission between a mobile unit and the base station.

摘要翻译： 本发明公开了一种使用资源有效的抛物线内插器来增加时域多址（TDMA）移动通信系统的定时精度的改进的系统和方法。 利用本发明，移动单元从基站接收突发传输，并从中恢复定时信息。 由于定时信息确定脉冲串的到达时间，所以相关性首先识别在脉冲串信号的确定部分内的控制信号的位置的粗略近似，并与两个相邻采样一起识别。 使用曲线拟合技术，确定峰值相对于粗略位置的精确位置。 该方程可以提前解决，三个样本的值代入单个表达式进行评估。 一旦方程式的系数是已知的，就可以容易地计算精确峰值相对于粗峰值的时间偏移。 然后将精细峰值用于在移动单元和基站之间的同步传输。

公开(公告)号：US20120134402A1

公开(公告)日：2012-05-31

申请号：US13361247

申请日：2012-01-30

申请人： Jaleh Komaili ,  John E. Vasa ,  Thomas Obkircher

发明人： Jaleh Komaili ,  John E. Vasa ,  Thomas Obkircher

IPC分类号： H04B17/00

CPC分类号： H04L27/3809 ,  H03G3/3089 ,  H04L27/2647

摘要： A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.

摘要翻译： 系统以WCDMA模式提供闭环增益控制，并以EDGE / GSM模式提供开环控制。 增益控制分布在无线接收机中的模拟设备和数字定标器上。 在WCDMA模式中，环路滤波器产生转发到模拟和数字控制路径的错误信号。 模拟控制路径包括第一加法器，可编程滞后元件和查找表。 模拟控制信号响应于当与先前增益值结合使用时确定新的增益值的阈值。 数字控制路径包括第二加法器，可编程延迟元件和转换器。 控制字响应误差信号，校准值和模拟控制信号的差异。 在WCDMA操作模式中提供阻塞检测。 控制器使用状态机设置系统参数。

公开(公告)号：US08126094B2

公开(公告)日：2012-02-28

申请号：US12349787

申请日：2009-01-07

申请人： Jaleh Komaili ,  John E. Vasa ,  Thomas Obkircher

发明人： Jaleh Komaili ,  John E. Vasa ,  Thomas Obkircher

IPC分类号： H04L27/08

CPC分类号： H04L27/3809 ,  H03G3/3089 ,  H04L27/2647

摘要： A system provides closed-loop gain control in a WCDMA mode and open loop control in an EDGE/GSM mode. Gain control is distributed across analog devices and a digital scaler in a wireless receiver. In the WCDMA mode, a loop filter generates an error signal that is forwarded to analog and digital control paths. The analog control path includes a first adder, a programmable hysteresis element, and a lookup table. The analog control signal is responsive to thresholds, which when used in conjunction with a previous gain value determine a new gain value. The digital control path includes a second adder, a programmable delay element, and a converter. A control word is responsive to a difference of the error signal, a calibration value, and the analog control signal. Blocker detection is provided in the WCDMA mode of operation. A controller sets system parameters using a state machine.

摘要翻译： 系统以WCDMA模式提供闭环增益控制，并以EDGE / GSM模式提供开环控制。 增益控制分布在无线接收机中的模拟设备和数字定标器上。 在WCDMA模式中，环路滤波器产生转发到模拟和数字控制路径的错误信号。 模拟控制路径包括第一加法器，可编程滞后元件和查找表。 模拟控制信号响应于当与先前增益值结合使用时确定新的增益值的阈值。 数字控制路径包括第二加法器，可编程延迟元件和转换器。 控制字响应误差信号，校准值和模拟控制信号的差异。 在WCDMA操作模式中提供阻塞检测。 控制器使用状态机设置系统参数。