公开(公告)号：US20100048146A1

公开(公告)日：2010-02-25

申请号：US12521412

申请日：2007-01-30

申请人： Ronald Duane McCallister

发明人： Ronald Duane McCallister

IPC分类号： H04B1/44

CPC分类号： H04B1/525 ,  H04B2001/0416

摘要： A transceiver (10) includes an RF transmitter (12) and an RF receiver (14) coupled together through a duplexer (30) or non-filtering multiport device (30′). Either device may leak significant portions (56, 58) of the transmit signal (20) into the receive signal (44), and may significantly distort the transmit signal (20). Distortion is compensated in the transmitter (12) through the use of a linear predistorter (68) that is adjusted in response to an RF feedback signal obtained from the antenna-side of the device. Transmit signal leakage is compensated in the receiver (14) by producing an RF cancellation signal (106) that, when combined with the receive signal (44) at RF at least partially cancels the transmit signal portions (56, 58) leaked into the receive signal (44). Residual leakage signal and intermodulation products thereof may be cancelled digitally.

摘要翻译： 收发器（10）包括通过双工器（30）或非过滤多端口设备（30'）耦合在一起的RF发射器（12）和RF接收器（14）。 任一装置可能将发射信号（20）的重要部分（56,58）泄漏到接收信号（44）中，并且可能使发射信号（20）显着失真。 在发射机（12）中通过使用响应于从设备的天线侧获得的RF反馈信号而调整的线性预失真器（68）来补偿变形。 在接收器（14）中通过产生RF信号（106）来补偿发射信号泄漏，该RF消除信号（106）当与RF中的接收信号（44）组合时至少部分地消除泄漏到接收器中的发射信号部分（56,58） 信号（44）。 可以数字地取消残留泄漏信号及其互调产物。

公开(公告)号：US20090227215A1

公开(公告)日：2009-09-10

申请号：US12043880

申请日：2008-03-06

申请人： Ronald Duane McCallister

发明人： Ronald Duane McCallister

IPC分类号： H04B1/04

CPC分类号： H04B1/04 ,  H03F1/0211 ,  H03F1/0266 ,  H03F1/3205 ,  H03F1/3247 ,  H03F1/34 ,  H03F3/193 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/15 ,  H03F2200/18 ,  H04B2001/0433

摘要： An RF transmitter (60) generates non-DC bias signals (104, 106) configured to improved power-added efficiency (PAE) in the operation of an RF amplifier (94). The RF amplifier (94) generates an amplified RF signal (126) which, due to the addition of the bias signals (104, 106), includes bias-signal-induced RF distortion (48, 50). The bias signals (104, 106) drive a bias-induced distortion cancellation circuit (152) that adjusts the bias signals to compensate for the influence of impedances experienced by the bias signals (104, 106) before being applied to the RF amplifier (94). After mixing with a baseband communication signal (64), adjusted bias signals (186, 188) are combined into a composite baseband signal (76), upconverted to RF in an upconversion section 84, and applied to the RF amplifier (94) where they cancel at least a portion of the bias-signal-induced RF distortion (48, 50).

摘要翻译： RF发射器（60）产生被配置为在RF放大器（94）的操作中改善功率附加效率（PAE）的非DC偏置信号（104,106）。 RF放大器（94）产生放大的RF信号（126），其由偏置信号（104,106）的相加而包括偏置信号引起的RF失真（48,50）。 偏置信号（104,106）驱动偏置引起的失真消除电路（152），该电路调节偏置信号以补偿在施加到RF放大器（94,106）之前偏置信号（104,106）所经受的阻抗的影响 ）。 在与基带通信信号（64）混合之后，调整的偏置信号（186,188）被组合成复合基带信号（76），在上变频部分84中被上变频到RF，并且被施加到RF放大器（94） 消除偏置信号引起的RF失真的至少一部分（48,50）。

公开(公告)号：US20050163252A1

公开(公告)日：2005-07-28

申请号：US11012427

申请日：2004-12-14

申请人： Ronald McCallister ,  Eric Brombaugh

发明人： Ronald McCallister ,  Eric Brombaugh

IPC分类号： H03D3/24 ,  H03F1/32 ,  H03H7/30 ,  H03H17/02 ,  H04B1/04 ,  H04K1/02 ,  H04L5/06 ,  H04L25/49 ,  H04L27/10 ,  H04L27/26

CPC分类号： H03F1/3247 ,  H03F1/3241 ,  H03F1/3252 ,  H03F1/3258 ,  H03F1/3294 ,  H03F1/34 ,  H03F3/24 ,  H03F2200/336 ,  H03H17/0294 ,  H04B1/0475 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04L5/06 ,  H04L27/2614

摘要： A digital communications transmitter (100) includes a digital linear-and-nonlinear predistortion section (200, 1800, 2800) to compensate for linear and nonlinear distortion introduced by transmitter-analog components (120). A direct-digital-downconversion section (300) generates a complex digital return-data stream (254) from the analog components (120) without introducing quadrature imbalance. A relatively low resolution exhibited by the return-data stream (254) is effectively increased through arithmetic processing. Distortion introduced by an analog-to-digital converter (304) may be compensated using a variety of adaptive techniques. Linear distortion is compensated using adaptive techniques with an equalizer (246) positioned in the forward-data stream (112). Nonlinear distortion is then compensated using adaptive techniques with a plurality of equalizers (226) that filter a plurality of orthogonal, higher-ordered-basis functions (214) generated from the forward-data stream (112). The filtered-basis functions are combined together and subtracted from the forward-data stream (112).

摘要翻译： 数字通信发射机（100）包括数字线性和非线性预失真部分（200，1800，2800），以补偿由发射机 - 模拟部件（120）引入的线性和非线性失真。 直接数字下变频部分（300）从模拟部件（120）生成复杂的数字返回数据流（254），而不引入正交不平衡。 返回数据流（254）显示的相对低的分辨率通过算术处理有效地增加。 可以使用各种自适应技术来补偿由模数转换器（304）引入的失真。 使用位于前向数据流（112）中的均衡器（246）的自适应技术补偿线性失真。 然后使用具有多个均衡器（226）的自适应技术来补偿非线性失真，所述多个均衡器对从前向数据流（112）生成的多个正交，高阶有序的函数（214）进行过滤。 滤波的基函数被组合在一起并从前向数据流（112）中减去。

公开(公告)号：US20050163251A1

公开(公告)日：2005-07-28

申请号：US10840735

申请日：2004-05-06

申请人： Ronald McCallister

发明人： Ronald McCallister

IPC分类号： H03F1/32 ,  H04B1/04 ,  H04K1/02 ,  H04L25/49 ,  H04L27/10 ,  H04L27/26

CPC分类号： H03F1/3247 ,  H03F1/3241 ,  H03F1/3252 ,  H03F1/3258 ,  H03F1/34 ,  H03F3/24 ,  H04B1/0475 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04L27/2614

摘要： A digital communications transmitter (100) includes a digital linear-and-nonlinear predistortion section (200, 1800) to compensate for linear and nonlinear distortion introduced by transmitter-analog components (120). A direct-digital-downconversion section (300) generates a complex digital return-data stream (254) from the analog components (120) without introducing quadrature imbalance. A relatively low resolution exhibited by the return-data stream (254) is effectively increased through arithmetic processing. Distortion introduced by an analog-to-digital converter (304) may be compensated using a variety of adaptive techniques. Linear distortion is compensated using adaptive techniques with an equalizer (246) positioned in the forward-data stream (112). Nonlinear distortion is then compensated using adaptive techniques with a plurality of equalizers (226) that filter a plurality of orthogonal, higher-ordered-basis functions (214) generated from the forward-data stream (112). The filtered-basis functions are combined together and subtracted from the forward-data stream (112).

摘要翻译： 数字通信发射机（100）包括数字线性和非线性预失真部分（200,1800），以补偿由发射机 - 模拟部件（120）引入的线性和非线性失真。 直接数字下变频部分（300）从模拟部件（120）生成复杂的数字返回数据流（254），而不引入正交不平衡。 返回数据流（254）显示的相对低的分辨率通过算术处理有效地增加。 可以使用各种自适应技术来补偿由模数转换器（304）引入的失真。 使用位于前向数据流（112）中的均衡器（246）的自适应技术来补偿线性失真。 然后使用具有多个均衡器（226）的自适应技术来补偿非线性失真，所述多个均衡器对从前向数据流（112）生成的多个正交，高阶基函数（214）进行过滤。 滤波的基函数被组合在一起并从前向数据流（112）中减去。

公开(公告)号：US20050163208A1

公开(公告)日：2005-07-28

申请号：US10971628

申请日：2004-10-22

申请人： Ronald McCallister

发明人： Ronald McCallister

IPC分类号： H03F1/32 ,  H03H21/00 ,  H03K5/159 ,  H04L25/03 ,  H04L27/36

CPC分类号： H03H21/0012 ,  H03F1/3247 ,  H03F1/3294 ,  H03F2200/336 ,  H03H2218/04 ,  H04L25/03343 ,  H04L27/368

摘要： A digital communication transmitter serves as a signal path (10) which uses an adaptive equalizer (18) in a predistortion role. The adaptive equalizer (18) pre-distorts a complex digital communication signal (12) that need not exhibit any distortion. Subsequent analog distortion-introducing segments (24, 30, 36, 42) then distort a predistorted signal (22) output from the adaptive equalizer (18). An error signal (46) is formed from a reference signal (52) and a return signal (54). The equalizer (18) implements an adaptation algorithm that adjusts filter (68) coefficients to minimize correlation between one of the reference and return signals (52, 54) and the error signal (46). The equalizer (18) generates four sets of coefficients for four different filters. Consequently, the equalizer (18) exhibits four degrees of freedom in introducing predistortion into a complex signal to counter the distortion subsequently introduced in the signal path (10) by the distortion-introducing segments (24, 30, 36, 42).

摘要翻译： 数字通信发射机用作使用预失真角色的自适应均衡器（18）的信号路径（10）。 自适应均衡器（18）预失真不需要出现任何失真的复数数字通信信号（12）。 随后的模拟失真引入段（24,30,36,42）使从自适应均衡器（18）输出的预失真信号（22）失真。 误差信号（46）由参考信号（52）和返回信号（54）形成。 均衡器（18）实现调整滤波器（68）系数以使参考和返回信号（52,54）之一与误差信号（46）之间的相关性最小化的自适应算法。 均衡器（18）为四个不同的滤波器生成四组系数。 因此，均衡器（18）具有四个自由度，将预失真引入到复信号中，以对抗由失真引入段（24,30,36,42）随后引入到信号路径（10）中的失真。

公开(公告)号：US09031520B2

公开(公告)日：2015-05-12

申请号：US13940042

申请日：2013-07-11

申请人： CrestCom, Inc.

发明人： Ronald Duane McCallister

IPC分类号： H04B1/04

CPC分类号： H04B1/0475 ,  H03F1/0266 ,  H03F1/3247 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/387 ,  H03F2200/462 ,  H04B2001/0433 ,  H04L27/368

摘要： A transmitter (32) generates a time-varying stabilized bias signal (82) from which an amplifier-generated, sub-RF distortion signal (26) has been canceled. The distortion signal (26) is a byproduct of amplification and is generated due to imperfect linearity and/or other characteristics of a linear RF power amplifier (36). An envelope amplifier (84) includes a high bandwidth differential input, linear, bias signal amplifier (120) and a low bandwidth switching amplifier (122) coupled together to achieve both a high bandwidth and high efficiency. A control loop (154) feeds a portion of the voltage V(t) from a conduction node (146) of the RF power amplifier (36) to one of the differential inputs of the linear bias signal amplifier (120), while a bias control signal (92) drives the other differential input. The portion of voltage V(t) fed to bias signal amplifier (120) is a low power portion from which the RF portion has been removed.

摘要翻译： 发射机（32）产生随时间变化的稳定偏置信号（82），放大器产生的子RF失真信号（26）从该偏移信号被取消。 失真信号（26）是放大的副产物，并且由于线性RF功率放大器（36）的不完美线性和/或其他特性而产生。 包络放大器（84）包括耦合在一起以实现高带宽和高效率的高带宽差分输入，线性偏置信号放大器（120）和低带宽开关放大器（122）。 控制回路（154）将来自RF功率放大器（36）的导通节点（146）的电压V（t）的一部分馈送到线性偏置信号放大器（120）的差分输入之一，而偏置 控制信号（92）驱动另一个差分输入。 馈送到偏置信号放大器（120）的电压V（t）的部分是RF部分已被去除的低功率部分。

公开(公告)号：US08976896B2

公开(公告)日：2015-03-10

申请号：US13881219

申请日：2011-10-21

申请人： Ronald Duane McCallister ,  Eric M. Brombaugh

发明人： Ronald Duane McCallister ,  Eric M. Brombaugh

IPC分类号： H04L25/49 ,  H04B1/04 ,  H03F1/02 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24

CPC分类号： H04B1/0475 ,  H03F1/02 ,  H03F1/0266 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/34 ,  H03F3/195 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/336 ,  H03F2201/3233 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04B2001/045

摘要： A transmitter (50) includes a low power nonlinear predistorter (58) that inserts predistortion configured to compensate for a memoryless nonlinearity (146) corresponding to gain droop and another memoryless nonlinearity (148) corresponding to a video signal. When efforts are taken to reduce memory effects, such as configuring a network of components (138) that couple to an HPA (114) to avoid resonance frequencies substantially throughout a video bandwidth (140), high performance linearization at low power results without extending linearization beyond that provided by the memoryless nonlinear predistorter (58). A look-up table (282) has address inputs responsive to a magnitude parameter (152) of a communication signal (54). A pre-distorted communication signal (60) is responsive to the output of the look-up table, a derivative signal (204), and possibly one or more variable bias parameters (85). The look-up table (282) is updated in response to an LMS control loop.

摘要翻译： 发射机（50）包括低功率非线性预失真器（58），其插入被配置为补偿对应于增益下降的无记忆非线性（146）的预失真和对应于视频信号的另一无记忆非线性（148）。 当努力减少存储器效应时，例如配置耦合到HPA（114）的组件网络（138）以在整个视频带宽（140）中基本上避免共振频率，在低功率下实现高性能线性化而不延长线性化 超过无记忆非线性预失真器（58）提供的。 查找表（282）具有响应于通信信号（54）的幅度参数（152）的地址输入。 预失真通信信号（60）响应于查找表的输出，导数信号（204）以及可能的一个或多个可变偏置参数（85）。 响应于LMS控制循环来更新查找表（282）。

公开(公告)号：US20150017933A1

公开(公告)日：2015-01-15

申请号：US13940042

申请日：2013-07-11

申请人： CrestCom, Inc.

发明人： Ronald Duane McCallister

IPC分类号： H04B1/04

CPC分类号： H04B1/0475 ,  H03F1/0266 ,  H03F1/3247 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/387 ,  H03F2200/462 ,  H04B2001/0433 ,  H04L27/368

摘要： A transmitter (32) generates a time-varying stabilized bias signal (82) from which an amplifier-generated, sub-RF distortion signal (26) has been canceled. The distortion signal (26) is a byproduct of amplification and is generated due to imperfect linearity and/or other characteristics of a linear RF power amplifier (36). An envelope amplifier (84) includes a high bandwidth differential input, linear, bias signal amplifier (120) and a low bandwidth switching amplifier (122) coupled together to achieve both a high bandwidth and high efficiency. A control loop (154) feeds a portion of the voltage V(t) from a conduction node (146) of the RF power amplifier (36) to one of the differential inputs of the linear bias signal amplifier (120), while a bias control signal (92) drives the other differential input. The portion of voltage V(t) fed to bias signal amplifier (120) is a low power portion from which the RF portion has been removed.

摘要翻译： 发射机（32）产生随时间变化的稳定偏置信号（82），放大器产生的子RF失真信号（26）从该偏移信号被取消。 失真信号（26）是放大的副产物，并且由于线性RF功率放大器（36）的不完美线性和/或其他特性而产生。 包络放大器（84）包括耦合在一起以实现高带宽和高效率的高带宽差分输入，线性偏置信号放大器（120）和低带宽开关放大器（122）。 控制回路（154）将来自RF功率放大器（36）的导通节点（146）的电压V（t）的一部分馈送到线性偏置信号放大器（120）的差分输入之一，而偏置 控制信号（92）驱动另一个差分输入。 馈送到偏置信号放大器（120）的电压V（t）的部分是RF部分已被去除的低功率部分。

公开(公告)号：US08605814B2

公开(公告)日：2013-12-10

申请号：US11870021

申请日：2007-10-10

申请人： Ronald Duane McCallister ,  Eric M. Brombaugh

发明人： Ronald Duane McCallister ,  Eric M. Brombaugh

IPC分类号： H04L27/00 ,  H03H7/32

CPC分类号： H04L25/03343 ,  H03F1/0261 ,  H03F1/3205 ,  H03F1/34 ,  H03F1/56 ,  H03F3/24 ,  H03F3/245 ,  H03F3/60 ,  H03F2200/15 ,  H03F2200/18 ,  H03F2200/423 ,  H03F2200/438 ,  H03F2200/451 ,  H04B2001/0433

摘要： An RF transmitter (10) includes an RF amplifier (28) that generates an amplified RF signal (36) including a linear RF signal (92) and a spurious baseband signal (94). The spurious baseband signal (94) interacts with bias feed networks (56, 66) to cause the RF amplifier (28) to generate an unwanted RF distortion at or near the allocated RF bandwidth. A baseband compensation signal (98) is generated and equalized in an adaptive equalizer (102) then fed to the RF amplifier (28). A feedback signal (46) is obtained from the RF amplifier (28) and used to drive the adaptive equalizer (102). A feedback loop causes the adaptive equalizer to adjust a baseband signal (24, 32) supplied to the RF amplifier (28) so that the RF distortion is minimized.

公开(公告)号：US20120108189A1

公开(公告)日：2012-05-03

申请号：US12917878

申请日：2010-11-02

申请人： Ronald Duane McCallister ,  Eric M. Brombaugh

发明人： Ronald Duane McCallister ,  Eric M. Brombaugh

IPC分类号： H04B1/04 ,  H03G3/30

CPC分类号： H04B1/0475 ,  H03F1/301 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/193 ,  H03F3/245 ,  H03F2200/15 ,  H03F2200/18 ,  H03G3/3042

摘要： A transmitter (50) includes a low power memoryless nonlinear predistorter (58) that inserts predistortion configured to address a nonlinearity (146) corresponding to gain droop and another nonlinearity (148) corresponding to deviations from an average bias condition. When efforts are taken to reduce memory effects, such as configuring a network of components (138) that couple to an HPA (114) to avoid resonance frequencies within a video bandwidth (140), high performance linearization at low power results without extending linearization beyond that provided by the memoryless nonlinear predistorter (58). Each nonlinearity is addressed by applying gain to a communication signal (54). The amount of gain applied is determined by a look-up table (170) for one nonlinearity (146) and by a look-up table (198) in combination with a differentiator (202) for the other nonlinearity (148). The look-up tables (170, 198) are updated in accordance with modified LMS control loops.

摘要翻译： 发射机（50）包括低功率无记忆非线性预失真器（58），其插入被配置为寻址对应于增益下降的非线性（146）的预失真和对应于与平均偏置条件的偏差相对应的另一非线性（148）。 当努力减少存储器效应时，例如配置耦合到HPA（114）的组件网络（138）以避免视频带宽（140）内的共振频率，在低功率下实现高性能线性化，而不会延长线性化超出 由无记忆非线性预失真器（58）提供。 通过将增益应用于通信信号来解决每个非线性（54）。 施加的增益量由用于一个非线性（146）的查找表（170）和与另一非线性（148）的微分器（202）组合的查找表（198）确定。 根据修改的LMS控制环来更新查找表（170,198）。