公开(公告)号：US10122476B2

公开(公告)日：2018-11-06

申请号：US15034199

申请日：2013-11-08

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Xuejun Sun ,  Chang Liu

IPC分类号： H03C1/62 ,  H04B17/00 ,  H04B17/12 ,  H04B17/21 ,  H04B17/10 ,  H04B17/14 ,  H04B7/04

摘要： The present disclosure provides a radio unit with internal parallel antenna calibration. The radio unit comprises an antenna calibrator, a plurality of transmission signal processing sections, a plurality of power amplifiers, a plurality of bandpass filters, a plurality of couplers, a plurality of reception signal processing sections and a first combiner. The antenna calibrator is configured to generate a plurality of individually identifiable reference signals used for transmission calibration. The transmission signal processing sections are configured to modulate the signals in parallel. The power amplifiers are configured to amplify the modulated signals to predetermined power levels in parallel. The bandpass filters are configured to apply bandpass filtering operations to the modulated signals in parallel. The couplers are configured to couple the filtered signals to a first combiner, which combines the filtered signals. One of the reception signal processing sections is configured to identify and demodulate each of the filtered signals constituting the combined signals. The antenna calibrator is further configured to compute transmission calibration vectors by comparing the demodulated signals with the reference signals.

公开(公告)号：US09712121B2

公开(公告)日：2017-07-18

申请号：US14403182

申请日：2014-11-22

申请人： Telefonaktiebolaget L M Ericsson (publ)

发明人： Bjorn Gavert ,  Tony Gustafsson

IPC分类号： H04B1/04 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24 ,  H04B1/40 ,  H04L25/03 ,  H03C1/62 ,  H04L27/36

CPC分类号： H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/195 ,  H03F3/24 ,  H03F3/245 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H04B1/40 ,  H04L25/03343 ,  H04L27/368

摘要： This disclosure provides a circuit for linearizing an output signal Sout produced by a non-linear component based on an input signal x(n). The circuit comprises a primary pre-distorter module configured to generate a pre-distorted signal y(n) based on the input signal x(n) and a primary pre-distortion function parameterized by a pre-distortion parameter λ and to feed the pre-distorted signal y(n) to the non-linear component. The circuit comprises an estimation module. The estimation module is configured to receive samples z(n) of the output signal Sout, and to determine the pre-distortion parameter λ. The estimation module comprises a secondary pre-distorter module configured to generate a secondary pre-distorter output signal r(n) based on a secondary pre-distortion function and the samples z(n) of the output signal Sout. The secondary pre-distorter module is configured to determine the pre-distortion parameter λ based on a previously determined pre-distortion parameter stored on a data storage, the secondary pre-distorter output signal r(n) and the pre-distorted signal y(n) provided by the primary pre-distorted module. The determining comprises correlating the input signal x(n) with an error signal between the pre-distorted signal y(n) and the secondary pre-distorter output signal r(n).

公开(公告)号：US09350591B2

公开(公告)日：2016-05-24

申请号：US14639296

申请日：2015-03-05

申请人： PARKERVISION, INC.

发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses ,  Gregory S. Rawlins ,  Michael W. Rawlins

IPC分类号： H03C1/62 ,  H03D7/00 ,  H04B1/00 ,  H04B1/16 ,  H04B1/28 ,  H04B7/12 ,  H04L25/08 ,  H04L27/00 ,  H04L27/06 ,  H04L27/12 ,  H04L27/14 ,  H04L27/38 ,  H04L27/148 ,  H04L27/156 ,  H03D7/14 ,  H04L27/26

CPC分类号： H04L27/3881 ,  H03C1/62 ,  H03D7/00 ,  H03D7/1441 ,  H03D7/1475 ,  H04B1/0025 ,  H04B1/16 ,  H04B1/28 ,  H04B7/12 ,  H04L25/08 ,  H04L27/00 ,  H04L27/06 ,  H04L27/12 ,  H04L27/14 ,  H04L27/148 ,  H04L27/156 ,  H04L27/2672

摘要： Methods for down converting a modulated carrier signal to a demodulated baseband signal are described herein. The method requires that a first portion of energy is transferred from the modulated carrier signal, and stored at a first storage device when a first switch is on. At least some of the energy stored in the first storage device is discharged when the first switch is off. The method further comprises transferring a second portion of energy from the modulated carrier signal, storing at a second storage device the second portion of transferred energy when a second switch is on, and discharging at least some of the energy stored in the second storage device when the second switch is off. A down-converted in-phase baseband signal portion is generated from the energy accumulated in the first storage device while both the charging and the discharging occurs, and a down-converted inverted in-phase baseband signal portion is generated from the energy accumulated in the second storage device while both the charging and the discharging occurs, and the two portions are combined with a first differential amplifier circuit to form a down-converted differential in-phase baseband signal.

摘要翻译： 这里描述了将调制载波信号下变频为解调的基带信号的方法。 该方法要求第一部分能量从调制的载波信号传送，并且当第一开关接通时存储在第一存储装置。 当第一开关断开时，存储在第一存储装置中的至少一些能量被放电。 该方法还包括从调制的载波信号传送能量的第二部分，当第二开关接通时，在第二存储装置处存储传输能量的第二部分，以及当存储在第二存储装置中的至少一些能量时， 第二个开关关闭。 在发生充电和放电的同时，从在第一存储装置中累积的能量产生下变频的同相基带信号部分，并且从累积在第一存储装置中的能量产生下变频的反相同相基带信号部分 第二存储装置同时发生充电和放电，并且两个部分与第一差分放大器电路组合以形成下变频的差分同相基带信号。

公开(公告)号：US09246737B2

公开(公告)日：2016-01-26

申请号：US14639366

申请日：2015-03-05

申请人： PARKERVISION, INC.

发明人： David F. Sorrells ,  Michael J. Bultman ,  Robert W. Cook ,  Richard C. Looke ,  Charley D. Moses ,  Gregory S. Rawlins ,  Michael W. Rawlins

IPC分类号： H04L27/38 ,  H03C1/62 ,  H03D7/00 ,  H04B1/00 ,  H04B1/28 ,  H04B7/12 ,  H04L27/00 ,  H04L27/12 ,  H04L27/14 ,  H04L27/148 ,  H04L27/156 ,  H03D7/14 ,  H04B1/16 ,  H04L25/08 ,  H04L27/06

CPC分类号： H04L27/3881 ,  H03C1/62 ,  H03D7/00 ,  H03D7/1441 ,  H03D7/1475 ,  H04B1/0025 ,  H04B1/16 ,  H04B1/28 ,  H04B7/12 ,  H04L25/08 ,  H04L27/00 ,  H04L27/06 ,  H04L27/12 ,  H04L27/14 ,  H04L27/148 ,  H04L27/156 ,  H04L27/2672

摘要： Methods, systems, and apparatus for down converting a modulated carrier signal to a demodulated baseband signal are described herein. A first switch is controlled with a first control signal which comprises a first sampling aperture with a specified frequency, wherein the first switch is on during the first sampling aperture and wherein the first switch is off outside the first sampling aperture. A second switch is controlled with a second control signal which comprises a second sampling aperture with a specified frequency, wherein the second switch is on during the second sampling aperture and wherein the second switch is off outside the second sampling aperture. The first and second control signals each control a charging and discharging cycle of a respective energy storage element so that for each switch a portion of energy is transferred to the respective energy storage element when the respective switch is on during the charging cycle, and a portion of previously transferred energy is discharged during the discharging cycle for each respective switch when the switch is off. A down-converted in-phase baseband signal portion is derived from energy accumulated at said first energy storage element during both the charging and the discharging cycles for the first energy storage element and a down-converted inverted in-phase baseband signal portion is derived from energy accumulated at said second energy storage element during both the charging and the discharging cycles for the second energy storage element, and the two portions are combined with a first differential amplifier circuit to form a down-converted differential in-phase baseband signal.

摘要翻译： 这里描述了用于将调制载波信号下变频到解调的基带信号的方法，系统和装置。 第一开关由第一控制信号控制，第一控制信号包括具有指定频率的第一采样孔，其中第一开关在第一采样孔期间接通，并且其中第一开关在第一采样孔外部关闭。 用第二控制信号控制第二开关，第二控制信号包括具有指定频率的第二采样孔，其中第二开关在第二采样孔期间接通，并且其中第二开关在第二采样孔外部断开。 第一和第二控制信号各自控制各自能量存储元件的充电和放电循环，使得对于每个开关，当相应的开关在充电循环期间接通时，一部分能量被传递到相应的能量存储元件，并且一部分 当开关断开时，对于各个开关，在放电周期期间，先前传输的能量被放电。 在第一能量存储元件的充电和放电周期期间，从在第一能量存储元件处累积的能量导出下变频的同相基带信号部分，并且从下转换的反相同步基带信号部分 在第二能量存储元件的充电和放电循环期间，在所述第二能量存储元件处累积的能量，并且两个部分与第一差分放大器电路组合以形成下变频的差分同相基带信号。

公开(公告)号：US09246521B2

公开(公告)日：2016-01-26

申请号：US14241348

申请日：2012-08-28

申请人： Masayoshi Kanno

发明人： Masayoshi Kanno

IPC分类号： H03C1/62 ,  H04B17/00 ,  H04B1/04 ,  H04B5/00 ,  H03J3/20

CPC分类号： H04B1/04 ,  H03J3/20 ,  H04B5/0031 ,  H04B5/0037 ,  H04B5/0081

摘要： Provided is a transmission device including a transmission unit that includes an antenna coil and performs communication with an external device by electromagnetic coupling, a signal output unit that generates a signal of a predetermined frequency and outputs the generated signal to the transmission unit, a communication monitor unit that monitors information about a current flowing through the antenna coil and determines a communication state based on the monitored information, and a communication correction unit that corrects a communication characteristic based on a determination result of the communication state in the communication monitor unit.

摘要翻译： 本发明提供一种发送装置，其具备包括天线线圈的发送部，通过电磁耦合与外部装置进行通信的信号输出部，生成预定频率的信号并向所述发送部输出所生成的信号的通信监视器 监视关于流经天线线圈的电流的信息的单元，并且基于所监视的信息确定通信状态;以及通信校正单元，其基于通信监视单元中的通信状态的确定结果来校正通信特性。

公开(公告)号：US09215014B2

公开(公告)日：2015-12-15

申请号：US14253854

申请日：2014-04-15

申请人： Realtek Semiconductor Corp.

发明人： Yuan-Shuo Chang ,  Chien-Yu Chen

IPC分类号： H03C1/62 ,  H04B17/00 ,  H04B17/13 ,  H04B17/14 ,  H04B17/19

CPC分类号： H04B17/13 ,  H04B17/14 ,  H04B17/19

摘要： A method for determining a default gain of a wireless transmission system is provided. The wireless transmission system includes a signal transmission path and a signal feedback path coupled to the signal transmission path. The signal transmission path includes a power amplification circuit and a gain stage having a plurality of transmission gains. The method includes the following step: setting a gain of the gain stage as a specific transmission gain of the transmission gains; transmitting a plurality of test signals through the signal transmission path in sequence to generate a plurality of amplified test signals, wherein at least a portion of powers of the test signals correspond to the transmission gains, respectively; receiving the amplified test signals through the signal feedback path in sequence, and accordingly obtaining corresponding signal gains; and determining a default gain of the gain stage according to the signal gains.

摘要翻译： 提供了一种用于确定无线传输系统的默认增益的方法。 无线传输系统包括耦合到信号传输路径的信号传输路径和信号反馈路径。 信号传输路径包括功率放大电路和具有多个传输增益的增益级。 该方法包括以下步骤：将增益级的增益设置为传输增益的特定传输增益; 通过信号传输路径依次发送多个测试信号以产生多个放大的测试信号，其中测试信号的功率的至少一部分分别对应于传输增益; 通过信号反馈路径顺序接收放大的测试信号，从而获得对应的信号增益; 以及根据所述信号增益来确定所述增益级的默认增益。

公开(公告)号：US09166707B2

公开(公告)日：2015-10-20

申请号：US14131652

申请日：2013-03-28

申请人： Panasonic Corporation

发明人： Toru Matsuura

IPC分类号： H04B1/04 ,  H03C1/62 ,  H04B17/00 ,  H04B7/005 ,  H04L27/00 ,  H04L27/18 ,  H04B17/11 ,  H04B17/14 ,  H04L27/36

CPC分类号： H04B17/11 ,  H04B7/005 ,  H04B17/14 ,  H04L27/00 ,  H04L27/18 ,  H04L27/36 ,  H04L27/364

摘要： It is intended to provide a transmitter capable of correcting signal distortion with high accuracy. Provided are a test signal generator; a frequency characteristics corrector for correcting an amplitude characteristic and a phase characteristic of a test signal; a modulator; an envelope detector; a frequency characteristics calculator for calculating frequency characteristics of an envelope signal; and a coefficients calculator for calculating, on the basis of the frequency characteristics, correction coefficients to be used for correcting the amplitude characteristic and the phase characteristic of the test signal. The test signal generator generates a test signal in which signal loci in each of at least two pairs of quadrants of first to fourth quadrants of the IQ plane are not symmetrical with each other.

摘要翻译： 旨在提供能够以高精度校正信号失真的发射机。 提供一个测试信号发生器; 用于校正测试信号的幅度特性和相位特性的频率特性校正器; 调制器 包络检测器 用于计算包络信号的频率特性的频率特性计算器; 以及系数计算器，用于根据频率特性来计算用于校正测试信号的幅度特性和相位特性的校正系数。 测试信号发生器产生测试信号，其中IQ平面的第一至第四象限的至少两对象限中的每一个中的信号位置彼此不对称。

公开(公告)号：US09136899B2

公开(公告)日：2015-09-15

申请号：US13908203

申请日：2013-06-03

申请人： Texas Instruments Incorporated

发明人： Sudipto Chakraborty

IPC分类号： H03C1/62 ,  H04B17/00 ,  H04B1/40 ,  H04W52/02

CPC分类号： H04B1/40 ,  H04W52/02 ,  H04W52/0261 ,  Y02D70/00 ,  Y02D70/144 ,  Y02D70/40

摘要： Integrated circuit transceiver circuitry (2) includes a first resonant circuit (3A) coupled to a narrowband interface (6,7A,7B,21) between a first amplifier (3,20) and an interfacing circuit (4,8,9,44), including a programmable first reactive element (C) and a second reactive element (L). Amplitude sensing circuitry (42) senses a maximum amplitude of an in-phase signal (I) or a quadrature-phase signal (Q). An on-chip first tone generation circuit (38,38A,38B,38C) generates tones for injection into the in-phase signal and the quadrature-phase signal and operates in response to frequency scanning circuitry (30) and the amplitude sensing circuitry to adjust the first reactive element (C) to calibrate the first resonant circuit to a desired resonant frequency by selectively coupling reactive sub-elements (1,2,4,8 . . . ×Cv) into the first reactive element (C).

摘要翻译： 集成电路收发器电路（2）包括耦合到第一放大器（3,20）和接口电路（4,8,9,44）之间的窄带接口（6,7A，7B，21）的第一谐振电路（3A） ），包括可编程的第一电抗元件（C）和第二电抗元件（L）。 幅度感测电路（42）感测同相信号（I）或正交相位信号（Q）的最大振幅。 片上第一音调产生电路（38,38A，38B，38C）产生用于注入到同相信号和正交相位信号中的音调，并响应于频率扫描电路（30）和振幅检测电路 通过选择性地将反应子元件（1,2,4,8 ...×Cv）耦合到第一反应元件（C）中，来调节第一电抗元件（C）以将第一谐振电路校准到期望的谐振频率。

公开(公告)号：US09031522B2

公开(公告)日：2015-05-12

申请号：US14010630

申请日：2013-08-27

申请人： RF Micro Devices, Inc.

发明人： Brian Baxter ,  Jason Millard ,  Roman Zbigniew Arkiszewski ,  Steven Selby

IPC分类号： H04B1/04 ,  H03C1/62 ,  H04B17/00 ,  H01Q11/12 ,  H03G99/00 ,  H03G3/30 ,  H03G3/20 ,  H04B1/62

CPC分类号： H03G99/00 ,  H03G3/20 ,  H03G3/3042 ,  H04B1/62

摘要： The present disclosure relates to envelope power supply calibration of a multi-mode RF power amplifier (PA) to ensure adequate headroom when operating using one of multiple communications modes. The communications modes may include multiple modulation modes, a half-duplex mode, a full-duplex mode, or any combination thereof. As such, each communications mode may have specific peak-to-average power and linearity requirements for the multi-mode RF PA. As a result, each communications mode may have corresponding envelope power supply headroom requirements. The calibration may include determining a saturation operating constraint based on calibration data obtained during saturated operation of the multi-mode RF PA. During operation of the multi-mode RF PA, the envelope power supply may be restricted to provide a minimum allowable magnitude based on an RF signal level of the multi-mode RF PA, the communications mode, and the saturation operating constraint to provide adequate headroom.

公开(公告)号：US08965307B2

公开(公告)日：2015-02-24

申请号：US13155979

申请日：2011-06-08

申请人： Michael Anthony Maiuzzo ,  Ronald T. Sones

发明人： Michael Anthony Maiuzzo ,  Ronald T. Sones

IPC分类号： H04B1/04 ,  H03C1/62 ,  H04B1/036

CPC分类号： H04B1/036

摘要： Systems and methods are disclosed relating to transmission of communications via high frequency antenna systems employing high-temperature superconductor filters and/or amplifiers. In certain embodiments, a comb linear amplifier combiner may be modified with, for example, cryogenically cooled and/or high-temperature superconductor components, such as matching units of bandpass filters. A computer control unit may be coupled to the transmission circuit to control operation of one or more of the low-power transmitters, filters, and/or amplifiers.

摘要翻译： 公开了通过使用高温超导体滤波器和/或放大器的高频天线系统进行通信的系统和方法。 在某些实施例中，梳状线性放大器组合器可以用例如低温冷却和/或高温超导体部件例如带通滤波器的匹配单元进行修改。 计算机控制单元可以耦合到传输电路以控制一个或多个低功率发射机，滤波器和/或放大器的操作。