公开(公告)号：US20130223565A1

公开(公告)日：2013-08-29

申请号：US13408819

申请日：2012-02-29

申请人： Ronald Duane McCallister

发明人： Ronald Duane McCallister

IPC分类号： H04L25/49

CPC分类号： H04L25/03343 ,  H03F1/0266 ,  H03F1/3247 ,  H03F1/56 ,  H03F3/1935 ,  H03F3/245 ,  H03F2200/108 ,  H03F2200/15 ,  H03F2200/18 ,  H03F2200/204 ,  H03F2200/207 ,  H03F2200/336 ,  H03F2200/387 ,  H03F2200/465 ,  H03F2200/555 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H03G3/3042

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 within a video bandwidth (140), high performance linearization at low power results without extending linearization beyond that provided by the memoryless nonlinear predistorter (58). A unadaptable look-up table (370) has address inputs responsive to a magnitude parameter (152) of a communication signal (54), a magnitude derivative parameter (204) of the communication signal (54), and a parameter (346, 366) related either directly or indirectly to battery voltage. The unadaptable look-up table (370) produces a gain-correcting signal (284) that adjusts the gain applied to the communication signal (54) prior to amplification.

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。 不适应的查找表（370）具有响应于通信信号（54）的幅度参数（152），通信信号（54）的幅度导数参数（204）和参数（346,366）的地址输入 ）直接或间接地与电池电压相关。 不适应查找表（370）产生增益校正信号（284），其在放大之前调整施加到通信信号（54）的增益。

公开(公告)号：US08185065B2

公开(公告)日：2012-05-22

申请号：US12580069

申请日：2009-10-15

申请人： Ronald Duane McCallister ,  Eric M. Brombaugh

发明人： Ronald Duane McCallister ,  Eric M. Brombaugh

IPC分类号： H04B1/16

CPC分类号： H04B1/0475 ,  H03F1/3247 ,  H03F1/34 ,  H03F3/19 ,  H03F3/24 ,  H03F2201/3209 ,  H04B2001/0433

摘要： A transmitting unit (12) clips a communication signal (14) to form a threshold-responsive signal (36, 36′) which includes in-band distortion (40) and out-of-band distortion (38). A portion of the out-of-band distortion (38) is notched within rejection bands (48, 50) adjacent to the communication signal's bandwidth (24). But remaining portions of the out-of-band distortion (38) and portions of the in-band distortion (40) are included with the communication signal (14). The remaining portion of the out-of-band distortion (38) causes the communication signal (14) to be in violation of a spectral mask (30). The mask-violating communication signal 14 with out-of-band distortion (38) and in-band distortion (40) is amplified by an RF power amplifier (22). After amplification, a bandpass filter (92) exhibiting fast rolloff regions (110) attenuates the amplified out-of-band distortion (38) causing compliance with the spectral mask (30).

摘要翻译： 发送单元（12）夹住通信信号（14）以形成包括带内失真（40）和带外失真（38）的阈值响应信号（36,36'）。 带外失真（38）的一部分在与通信信号带宽（24）相邻的抑制频带（48,50）内被切断。 但是，通信信号（14）包括带外失真（38）的剩余部分和带内失真（40）的部分。 带外失真（38）的剩余部分导致通信信号（14）违反频谱掩模（30）。 具有带外失真（38）和带内失真（40）的屏蔽违规通信信号14被RF功率放大器（22）放大。 在放大之后，呈现快速滚降区域（110）的带通滤波器（92）衰减放大的带外失真（38），导致符合频谱掩模（30）。

公开(公告)号：US07978749B2

公开(公告)日：2011-07-12

申请号：US11777881

申请日：2007-07-13

申请人： Ronald Duane McCallister

发明人： Ronald Duane McCallister

IPC分类号： H04B1/00

CPC分类号： H04L5/0017 ,  H04L5/0037 ,  H04L25/03834

摘要： A direct sequence spread spectrum (DSSS) transmitter (12) is configured to form “N” multiple excess-bandwidth channels (44) in an allocated bandwidth (54), where N is an integer. Each excess-bandwidth channel (44) includes a lower rolloff band (40), a minimum-bandwidth channel (38), and an upper rolloff band (42). The N excess-bandwidth channels (44) are placed in the allocated bandwidth (54) so that two of the rolloff bands (40, 42) reside within allocated bandwidth 54 and outside all of minimum-bandwidth channels 38 and so that N−2 of the rolloff bands (40, 42) predominately reside within adjacent minimum-bandwidth channels (38). The excess-bandwidth channels (44) substantially conform to EV-DO standards, and four of the excess-bandwidth channels (44) are supported for each 5 MHz of allocated bandwidth (54).

摘要翻译： 直接序列扩频（DSSS）发射机（12）被配置为在分配的带宽（54）中形成“N”个多个超宽带信道（44），其中N是整数。 每个超带宽信道（44）包括下滚动频带（40），最小带宽信道（38）和上滚动频带（42）。 N个多余带宽信道（44）被放置在所分配的带宽（54）中，使得两个滚降频带（40,42）驻留在分配的带宽54内并且在所有最小带宽信道38之外，并且使得N-2 滚动频带（40,42）主要驻留在相邻的最小带宽信道（38）内。 多余带宽信道（44）基本上符合EV-DO标准，并且对于每个5MHz的分配带宽（54）支持四个超带宽信道（44）。

公开(公告)号：US07869767B2

公开(公告)日：2011-01-11

申请号：US12333736

申请日：2008-12-12

申请人： Ronald D. McCallister ,  Eric M. Brombaugh

发明人： Ronald D. McCallister ,  Eric M. Brombaugh

IPC分类号： H04B17/00

CPC分类号： H03G3/3047 ,  H03F1/0205 ,  H03F3/24 ,  H03F2200/165 ,  H03F2200/258 ,  H03G3/3042 ,  H04B1/0475 ,  H04L27/2624

摘要： A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold and generates a corresponding excursion signal. The scaling system applies a real scale factor to contiguous sets of excursion samples in order to optimize peak-reduction performance. The filter system filters the excursion signal to remove unwanted frequency components from the excursion signal. The filtered excursion signal may then be subtracted from a delayed version of the original signal to reduce the peak. The signal processing system may also control power consumption by adjusting the threshold. The signal processing system may additionally adjust the scale of the excursion signal and/or individual channel signals, such as to meet constraints on channel noise and output spectrum, or to optimize peak reduction. The magnitude threshold, excursion signal and/or individual channel signals may also be adaptively adjusted based on, for example, a channel signal quality such as a noise level specification.

摘要翻译： 根据本发明的各个方面的信号处理系统包括偏移信号发生器，缩放系统和滤波器系统。 偏移信号发生器识别超过阈值的信号的峰值部分，并产生相应的偏移信号。 缩放系统将实际比例因子应用于连续的偏移样本集，以优化峰值降低性能。 滤波器系统对偏移信号进行滤波以从偏移信号中去除不需要的频率分量。 然后可以从原始信号的延迟版本中减去滤波的偏移信号以减小峰值。 信号处理系统还可以通过调整阈值来控制功耗。 信号处理系统可以另外调整偏移信号和/或单个信道信号的比例，例如以满足对信道噪声和输出频谱的约束，或者优化峰值减小。 幅度阈值，偏移信号和/或单个信道信号也可以基于例如诸如噪声电平指定的信道信号质量自适应地调整。

公开(公告)号：US07751786B2

公开(公告)日：2010-07-06

申请号：US12333847

申请日：2008-12-12

申请人： Ronald D. McCallister ,  Eric M. Brombaugh

发明人： Ronald D. McCallister ,  Eric M. Brombaugh

IPC分类号： H04B17/00

CPC分类号： H03G3/3047 ,  H03F1/0205 ,  H03F3/24 ,  H03F2200/165 ,  H03F2200/258 ,  H03G3/3042 ,  H04B1/0475 ,  H04L27/2624

摘要： A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold and generates a corresponding excursion signal. The scaling system applies a real scale factor to contiguous sets of excursion samples in order to optimize peak-reduction performance. The filter system filters the excursion signal to remove unwanted frequency components from the excursion signal. The filtered excursion signal may then be subtracted from a delayed version of the original signal to reduce the peak. The signal processing system may also control power consumption by adjusting the threshold. The signal processing system may additionally adjust the scale of the excursion signal and/or individual channel signals, such as to meet constraints on channel noise and output spectrum, or to optimize peak reduction. The magnitude threshold, excursion signal and/or individual channel signals may also be adaptively adjusted based on, for example, a channel signal quality such as a noise level specification.

公开(公告)号：US20090097590A1

公开(公告)日：2009-04-16

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： H03F1/32 ,  H04M3/42

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.

摘要翻译： RF发射器（10）包括产生包括线性RF信号（92）和伪基带信号（94）的放大RF信号（36）的RF放大器（28）。 伪基带信号（94）与偏置馈电网络（56,66）相互作用，以使RF放大器（28）在分配的RF带宽处或附近产生不期望的RF失真。 在自适应均衡器（102）中生成并均衡基带补偿信号（98），然后馈送到RF放大器（28）。 从RF放大器（28）获得反馈信号（46）并用于驱动自适应均衡器（102）。 反馈环路使得自适应均衡器调整提供给RF放大器（28）的基带信号（24,32），使得RF失真最小化。

公开(公告)号：US07430248B2

公开(公告)日：2008-09-30

申请号：US10766779

申请日：2004-01-27

申请人： Ronald Duane McCallister

发明人： Ronald Duane McCallister

IPC分类号： H04K1/02

CPC分类号： H03F1/3247 ,  H03F1/3294 ,  H04L25/03834 ,  H04L27/2626 ,  H04L27/3411 ,  H04L27/368

摘要： A digital communications transmitter (100) includes a digital linear-and-nonlinear predistortion section (200) 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. Linear distortion is first 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）包括用于补偿由发射机 - 模拟部件（120）引入的线性和非线性失真的数字线性和非线性预失真部分（200）。 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。 使用具有位于前向数据流（112）中的均衡器（246）的自适应技术首先补偿线性失真。 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：US07295816B2

公开(公告)日：2007-11-13

申请号：US10732390

申请日：2003-12-09

申请人： Ronald D. McCallister

发明人： Ronald D. McCallister

IPC分类号： H04B1/04 ,  H04B1/18

CPC分类号： H04B1/0475

摘要： A communication and/or amplifier system according to various aspects of the present invention includes an excursion signal generator and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold, such as a magnitude threshold. The filter system filters a corresponding excursion signal having a magnitude and waveform corresponding to the portion exceeding the threshold to remove unwanted frequency components from a delayed version of the excursion signal. The filtered excursion signal may then be subtracted from the original signal to reduce the peak. In one embodiment, the communication and/or amplifier system operates in conjunction with signals having multiple channels and subchannels. The system may include a magnitude adjustment system configured to adjust magnitudes of the excursion signal subchannels according to magnitudes of the first signal subchannels. The system may also adjust the excursion signal magnitude in a time division environment according to the magnitude of the original signal in the same time slot.

摘要翻译： 根据本发明的各个方面的通信和/或放大器系统包括偏移信号发生器和滤波器系统。 偏移信号发生器识别超过阈值（例如幅度阈值）的信号的峰值部分。 滤波器系统对具有对应于超过阈值的部分的幅度和波形的对应偏移信号进行滤波，以从偏移信号的延迟版本中去除不需要的频率分量。 然后可以从原始信号中减去滤波的偏移信号以减小峰值。 在一个实施例中，通信和/或放大器系统结合具有多个信道和子信道的信号进行操作。 系统可以包括幅度调整系统，其被配置为根据第一信号子信道的幅度来调整偏移信号子信道的幅度。 该系统还可以根据相同时隙中原始信号的幅度在时分环境中调整偏移信号幅度。