公开(公告)号：US07979042B2

公开(公告)日：2011-07-12

申请号：US11967759

申请日：2007-12-31

申请人： Ali Afsahi ,  Arya Behzad

发明人： Ali Afsahi ,  Arya Behzad

IPC分类号： H04B1/26

CPC分类号： H04B7/084 ,  H04B7/10

摘要： A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a second resistor having a first resistor node and a second resistor node and a second capacitor coupled between the first resistor node and the ground. The RF phase shifter generates arbitrary phase shift by using a scheme of adding two perpendicular vectors with variable gains (or amplitudes).

摘要翻译： 一种具有RC-CR电路的射频（RF）移相器，其包括具有第一电容器节点和第二电容器节点的第一电容器和耦合在第一电容器节点和地之间的第一电阻器。 RC-CR电路还包括具有第一电阻器节点和第二电阻器节点的第二电阻器，以及耦合在第一电阻器节点和地之间的第二电容器。 RF移相器通过使用添加具有可变增益（或幅度）的两个垂直向量的方案来产生任意的相移。

公开(公告)号：US20080137772A1

公开(公告)日：2008-06-12

申请号：US11618699

申请日：2006-12-29

申请人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon

发明人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon

IPC分类号： H04L25/03

CPC分类号： H03F1/3247 ,  H03F1/3294 ,  H03F2200/336 ,  H03F2200/57 ,  H04L27/368

摘要： Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer are presented. Aspects of the system may include at least one circuit that enables generation of an output signal in response to one or more generated input signals. A feedback signal may be generated within a single feedback mixer circuit that may perform a frequency mix-down operation on the generated output signal. The generated feedback signal may be inserted at one or more insertion points in a receiver. Each of the insertion points may be located between a mixer stage of the receiver, and one or more circuits that generate a baseband signal based on the generated feedback signal.

摘要翻译： 提出了通过利用具有单个反馈混频器的数字预失真方案来补偿发射机中的估计失真的方法和系统的方面。 该系统的方面可以包括响应于一个或多个所生成的输入信号而能够产生输出信号的至少一个电路。 可以在可以对所生成的输出信号执行频率混合运算的单个反馈混频器电路内产生反馈信号。 产生的反馈信号可以插入接收器中的一个或多个插入点。 每个插入点可以位于接收器的混合器级之间，以及基于产生的反馈信号产生基带信号的一个或多个电路。

公开(公告)号：US20080136526A1

公开(公告)日：2008-06-12

申请号：US11618877

申请日：2006-12-31

申请人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon

发明人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon

IPC分类号： H03F3/04

CPC分类号： H03F1/3247 ,  H03F1/3211 ,  H03F1/3241 ,  H03F1/3294 ,  H03F3/45188 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2203/45112 ,  H03F2203/45244 ,  H03F2203/45292 ,  H03F2203/45554 ,  H04B2001/0425

摘要： Aspects of a method and system for a highly efficient power amplifier (PA) utilizing dynamic biasing and predistortion are presented. Aspects of the system may include a processor that enables computation of a value of a variable bias component of a bias current based on a bias slope value and an amplitude of an envelope input signal. The processor may enable computation of a value of the bias current based on the selected constant bias current component value and the variable bias current component value. A PA may enable generation of an output signal in response to a generated baseband signal by utilizing the bias current to amplify an amplifier input signal. The bias current may be generated based on the envelope input signal. A feedback signal may be generated based on the output signal, which may be used to predistort a subsequent baseband signal.

摘要翻译： 提出了一种利用动态偏置和预失真的高效功率放大器（PA）的方法和系统。 该系统的方面可以包括能够基于偏置斜率值和包络输入信号的幅度来计算偏置电流的可变偏置分量的值的处理器。 该处理器可以使得能够基于所选择的恒定偏置电流分量值和可变偏置电流分量值来计算偏置电流的值。 PA可以通过利用偏置电流来放大放大器输入信号，从而能够响应于产生的基带信号而产生输出信号。 可以基于包络输入信号产生偏置电流。 可以基于输出信号来生成反馈信号，该输出信号可以用于对随后的基带信号进行预失真。

公开(公告)号：US20070058747A1

公开(公告)日：2007-03-15

申请号：US11224609

申请日：2005-09-12

申请人： Ali Afsahi ,  Arya Behzad

发明人： Ali Afsahi ,  Arya Behzad

IPC分类号： H04L27/10 ,  H04L27/18

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D2200/0025 ,  H03D2200/0084 ,  H04L27/2647

摘要： An integrated circuit radio transceiver comprises an integrated phase shift mixer for generating a phase and frequency shifted output signal to at least a portion of one of a transmitter or receiver front end. The integrated phase shift mixer includes a phase shift block that is operable to produce a phase shifted current signal at an output of the phase shift block and a mixer that is operable to produce the phase and frequency shifted output signal based upon the phase shifted current signal. One aspect of the present invention is that the phase shift block produces an output as a current signal and the mixer block is operably disposed and formed to receive the current signal produced by the phase shift block. Thus, the mixer includes a folded cascode mixer that provides a substantially low input impedance.

摘要翻译： 集成电路无线电收发器包括集成相移混频器，用于产生到发射机或接收机前端中的至少一部分的相位和频移输出信号。 集成相移混频器包括相移块，其可操作以在相移块的输出处产生相移电流信号，以及混频器，其可操作以基于相移电流信号产生相位和频移输出信号 。 本发明的一个方面是相移块产生作为电流信号的输出，并且混合器块可操作地设置和形成以接收由相移块产生的电流信号。 因此，混频器包括提供基本上低的输入阻抗的折叠共源共栅混合器。

公开(公告)号：US20060229042A1

公开(公告)日：2006-10-12

申请号：US11102515

申请日：2005-04-08

申请人： Ali Afsahi ,  Arya Behzad

发明人： Ali Afsahi ,  Arya Behzad

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04B7/084 ,  H04B7/10

摘要： A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a second resistor having a first resistor node and a second resistor node and a second capacitor coupled between the first resistor node and the ground. The RF phase shifter generates arbitrary phase shift by using a scheme of adding two perpendicular vectors with variable gains (or amplitudes).

摘要翻译： 一种具有RC-CR电路的射频（RF）移相器，其包括具有第一电容器节点和第二电容器节点的第一电容器和耦合在第一电容器节点和地之间的第一电阻器。 RC-CR电路还包括具有第一电阻器节点和第二电阻器节点的第二电阻器，以及耦合在第一电阻器节点和地之间的第二电容器。 RF移相器通过使用添加具有可变增益（或幅度）的两个垂直向量的方案来产生任意的相移。

公开(公告)号：US20120236912A1

公开(公告)日：2012-09-20

申请号：US13484474

申请日：2012-05-31

申请人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon ,  Mark Gonikberg ,  George Varghese ,  Guruprasad Revanna

发明人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon ,  Mark Gonikberg ,  George Varghese ,  Guruprasad Revanna

IPC分类号： H04B1/44

CPC分类号： H03F1/3247 ,  H03F1/3294 ,  H03F2200/336 ,  H03F2200/451 ,  H04L27/368

摘要： Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a quadrature feedback mixer configuration are presented. Aspects of the system may include an RF transmitter that enables generation of an RF output signal in response to one or more generated input signals. One or more feedback signals may be generated by performing frequency downconversion on the RF output signal within a corresponding one or more feedback mixer circuits. The generated one or more feedback signals may be inserted at a corresponding one or more insertion points in an RF receiver. Each insertion point may be between a receiver mixer circuit and corresponding circuits that generate a baseband signal based on the corresponding one of the feedback signals.

摘要翻译： 提出了通过利用具有正交反馈混频器配置的数字预失真方案来补偿发射机中的估计失真的方法和系统的方面。 系统的方面可以包括RF发射器，其能够响应于一个或多个所生成的输入信号而产生RF输出信号。 可以通过对相应的一个或多个反馈混频器电路中的RF输出信号执行频率下变频来产生一个或多个反馈信号。 所生成的一个或多个反馈信号可以插入RF接收器中相应的一个或多个插入点。 每个插入点可以在接收机混合器电路和基于相应的一个反馈信号产生基带信号的相应电路之间。

公开(公告)号：US20120224618A1

公开(公告)日：2012-09-06

申请号：US13471651

申请日：2012-05-15

申请人： Arya Behzad ,  Ali Afsahi ,  Mark Gonikberg

发明人： Arya Behzad ,  Ali Afsahi ,  Mark Gonikberg

IPC分类号： H04B17/00 ,  H04B1/06

CPC分类号： H04B7/0811

摘要： A method for processing signals in a receiver includes receiving a plurality of wireless signals via a plurality of M receive antennas coupled to M corresponding signal amplifiers. The method may also include measuring corresponding signal strengths of M signals generated when each of M phase-shifters is coupled to each of the M receive antennas, while one or more of the M signal amplifiers are disabled. One of the M generated signals may be selected for processing without the use of an antenna switch, where the selecting may be based on the measured signal strength. Each of the plurality of received wireless signals may be amplified prior to the measuring. One or both of an in-phase (I) component and/or a quadrature (Q) component may be generated for each of the M generated signals.

摘要翻译： 用于在接收机中处理信号的方法包括经由耦合到M个相应信号放大器的多个M个接收天线接收多个无线信号。 该方法还可以包括当M个移相器中的每一个耦合到M个接收天线中的每一个时产生的M个信号的相应信号强度，而一个或多个M个信号放大器被禁用。 可以选择M个生成的信号中的一个用于处理而不使用天线开关，其中选择可以基于测量的信号强度。 多个接收的无线信号中的每一个可以在测量之前被放大。 可以为M个生成的信号中的每一个产生同相（I）分量和/或正交（Q）分量中的一个或两个。

公开(公告)号：US07856215B2

公开(公告)日：2010-12-21

申请号：US11618808

申请日：2006-12-30

申请人： Arya Behzad ,  Ali Afsahi ,  Mark Gonikberg

发明人： Arya Behzad ,  Ali Afsahi ,  Mark Gonikberg

IPC分类号： H04B17/00 ,  H04B17/02 ,  H04B1/06 ,  H04B7/00

CPC分类号： H04B7/0811

摘要： Aspects of a method and system for signal processing are disclosed and may include receiving a plurality of wireless signals via a plurality of M receive antennas. Each of M phase shifters coupled to each of the M receive antennas may be set to operate in a bypass mode or with an arbitrary phase setting. Corresponding signal strengths of M signals generated when each of the M phase-shifters is coupled to each of the M receive antennas may be measured, while at least a portion of the M receive antennas are turned off. Selecting one of the M generated signals for processing without the use of an antenna switch, based on the measured signal strength. A signal strength of each of the generated M amplified signals may be measured while turning off at least one of the plurality of M receive antennas and without the use of the phase-shifters.

摘要翻译： 公开了用于信号处理的方法和系统的方面，并且可以包括经由多个M个接收天线接收多个无线信号。 耦合到M个接收天线中的每一个的M个移相器中的每一个可以被设置为以旁路模式或任意相位设置操作。 当M个接收天线的至少一部分被关闭时，可以测量当每个M个移相器耦合到每个M个接收天线时产生的M个信号的相应信号强度。 基于测量的信号强度，选择M个生成的信号之一进行处理而不使用天线开关。 可以在断开多个M个接收天线中的至少一个并且不使用移相器的同时测量所产生的M个放大信号中的每一个的信号强度。

公开(公告)号：US07492223B2

公开(公告)日：2009-02-17

申请号：US11618877

申请日：2006-12-31

申请人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon

发明人： Arya Behzad ,  Ali Afsahi ,  Vikram Magoon

IPC分类号： H03G3/20

CPC分类号： H03F1/3247 ,  H03F1/3211 ,  H03F1/3241 ,  H03F1/3294 ,  H03F3/45188 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2203/45112 ,  H03F2203/45244 ,  H03F2203/45292 ,  H03F2203/45554 ,  H04B2001/0425

摘要： Aspects of a method and system for a highly efficient power amplifier (PA) utilizing dynamic biasing and predistortion are presented. Aspects of the system may include a processor that enables computation of a value of a variable bias component of a bias current based on a bias slope value and an amplitude of an envelope input signal. The processor may enable computation of a value of the bias current based on the selected constant bias current component value and the variable bias current component value. A PA may enable generation of an output signal in response to a generated baseband signal by utilizing the bias current to amplify an amplifier input signal. The bias current may be generated based on the envelope input signal. A feedback signal may be generated based on the output signal, which may be used to predistort a subsequent baseband signal.

摘要翻译： 提出了一种利用动态偏置和预失真的高效功率放大器（PA）的方法和系统。 该系统的方面可以包括能够基于偏置斜率值和包络输入信号的幅度来计算偏置电流的可变偏置分量的值的处理器。 该处理器可以使得能够基于所选择的恒定偏置电流分量值和可变偏置电流分量值来计算偏置电流的值。 PA可以通过利用偏置电流来放大放大器输入信号，从而能够响应于产生的基带信号而产生输出信号。 可以基于包络输入信号产生偏置电流。 可以基于输出信号来生成反馈信号，该输出信号可以用于对随后的基带信号进行预失真。

公开(公告)号：US20080139154A1

公开(公告)日：2008-06-12

申请号：US11618808

申请日：2006-12-30

申请人： Arya Behzad ,  Ali Afsahi ,  Mark Gonikberg

发明人： Arya Behzad ,  Ali Afsahi ,  Mark Gonikberg

IPC分类号： H04B7/00

CPC分类号： H04B7/0811

摘要： Aspects of a method and system for signal processing are disclosed and may include receiving a plurality of wireless signals via a plurality of M receive antennas. Each of M phase shifters coupled to each of the M receive antennas may be set to operate in a bypass mode or with an arbitrary phase setting. Corresponding signal strengths of M signals generated when each of the M phase-shifters is coupled to each of the M receive antennas may be measured, while at least a portion of the M receive antennas are turned off. Selecting one of the M generated signals for processing without the use of an antenna switch, based on the measured signal strength. A signal strength of each of the generated M amplified signals may be measured while turning off at least one of the plurality of M receive antennas and without the use of the phase-shifters.

摘要翻译： 公开了用于信号处理的方法和系统的方面，并且可以包括经由多个M个接收天线接收多个无线信号。 耦合到M个接收天线中的每一个的M个移相器中的每一个可以被设置为以旁路模式或任意相位设置操作。 当M个接收天线的至少一部分被关闭时，可以测量当每个M个移相器耦合到每个M个接收天线时产生的M个信号的相应信号强度。 基于测量的信号强度，选择M个生成的信号之一进行处理而不使用天线开关。 可以在断开多个M个接收天线中的至少一个并且不使用移相器的同时测量所产生的M个放大信号中的每一个的信号强度。