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1. 发明授权

US09258150B2 Channel estimation filtering 有权
标题翻译：信道估计滤波
公开(公告)号：US09258150B2
公开(公告)日：2016-02-09
申请号：US13339341
申请日：2011-12-28
申请人： James Peroulas , Patrick Svedman
发明人： James Peroulas , Patrick Svedman
IPC分类号： H04B3/46 , H04B17/00 , H04Q1/20 , H04L25/02 , H04L27/26
CPC分类号： H04L25/0232 , H04L25/0212 , H04L25/022 , H04L27/2647
摘要： The disclosed methods and systems for improved OFDM channel estimation filtering take advantage of the presence of highly correlated adjacent subcarriers to reduce the computational intensiveness of channel estimation filtering. Specifically, baseband signals corresponding to a channel are received. The cyclic prefixes of the baseband signals are removed, and the resulting signal is transformed into the frequency domain, and compensated by a first time offset of the baseband receive signal. Subcarrier signals used to transmit the baseband signal are then extracted. Adjacent subcarriers having channel responses highly correlated to the subcarriers of the channel are identified, and the signal is compensated by a second time offset that corresponds to a minimal angle of the autocorrelation function of the subcarrier and adjacent subcarriers. The resulting signal is filtered to produce filtered channel estimates, using a filter having a filter length corresponding to the number of highly correlated subcarriers that were identified.
摘要翻译：所公开的用于改进的OFDM信道估计滤波的方法和系统利用高度相关的相邻子载波的存在来利用信道估计滤波的计算强度。具体地，接收与信道相对应的基带信号。去除基带信号的循环前缀，并将得到的信号变换成频域，并由基带接收信号的第一时间偏移补偿。然后提取用于发送基带信号的子载波信号。识别具有与信道的子载波高度相关的信道响应的相邻副载波，并且该信号由对应于子载波和相邻子载波的自相关函数的最小角度的第二时间偏移补偿。使用具有对应于所识别的高度相关的子载波的数量的滤波器长度的滤波器来对结果信号进行滤波以产生滤波的信道估计。

2. 发明申请

US20120170630A1 CHANNEL ESTIMATION FILTERING 有权
标题翻译：频道估计滤波
公开(公告)号：US20120170630A1
公开(公告)日：2012-07-05
申请号：US13339341
申请日：2011-12-28
申请人： James Peroulas , Patrick Svedman
发明人： James Peroulas , Patrick Svedman
IPC分类号： H04L27/28 , H04W24/02 , H04B1/10
CPC分类号： H04L25/0232 , H04L25/0212 , H04L25/022 , H04L27/2647
摘要： The disclosed methods and systems for improved OFDM channel estimation filtering take advantage of the presence of highly correlated adjacent subcarriers to reduce the computational intensiveness of channel estimation filtering. Specifically, baseband signals corresponding to a channel are received. The cyclic prefixes of the baseband signals are removed, and the resulting signal is transformed into the frequency domain, and compensated by a first time offset of the baseband receive signal. Subcarrier signals used to transmit the baseband signal are then extracted. Adjacent subcarriers having channel responses highly correlated to the subcarriers of the channel are identified, and the signal is compensated by a second time offset that corresponds to a minimal angle of the autocorrelation function of the subcarrier and adjacent subcarriers. The resulting signal is filtered to produce filtered channel estimates, using a filter having a filter length corresponding to the number of highly correlated subcarriers that were identified.
摘要翻译：所公开的用于改进的OFDM信道估计滤波的方法和系统利用高度相关的相邻子载波的存在来利用信道估计滤波的计算强度。具体地，接收与信道相对应的基带信号。去除基带信号的循环前缀，并将得到的信号变换成频域，并由基带接收信号的第一时间偏移补偿。然后提取用于发送基带信号的子载波信号。识别具有与信道的子载波高度相关的信道响应的相邻副载波，并且该信号由对应于子载波和相邻子载波的自相关函数的最小角度的第二时间偏移补偿。使用具有对应于所识别的高度相关的子载波的数量的滤波器长度的滤波器来对结果信号进行滤波以产生滤波的信道估计。

3. 发明授权

US09287833B2 Capture buffer of digital predistortion systems 有权
标题翻译：数字预失真系统的捕获缓冲区
公开(公告)号：US09287833B2
公开(公告)日：2016-03-15
申请号：US14348411
申请日：2011-04-19
申请人： James Peroulas , Aimin You , Qun Liao , Xiaowei Yan , Yiqun Mo , Zhaoquan Zeng
发明人： James Peroulas , Aimin You , Qun Liao , Xiaowei Yan , Yiqun Mo , Zhaoquan Zeng
IPC分类号： H03F1/32 , H03F3/195 , H03F3/24 , H04L27/36
CPC分类号： H03F1/3247 , H03F3/195 , H03F3/24 , H03F2201/3227 , H04L27/367
摘要： An improved DPD system includes a predistortion module having at least one predistortion function. The predistortion module is configured to receive and subsequently process a baseband signal. The system also includes a power amplifier configured to receive the processed baseband signal from the predistortion module. The system further includes a model calculator configured to program priorities for predistortion functions so that the processed baseband signal transmitted from the predistortion module corresponds to the transmission power of the power amplifier. The model calculator is further configured to send a trigger signal to indicate when data capture from the power amplifier should begin so as to update the predistortion functions. A trigger module in the system is configured to receive the trigger signal and to initiate data capture from the power amplifier upon receipt of the trigger signal.
摘要翻译：改进的DPD系统包括具有至少一个预失真功能的预失真模块。预失真模块被配置为接收并随后处理基带信号。该系统还包括功率放大器，被配置为从预失真模块接收经处理的基带信号。该系统还包括：模型计算器，被配置为对预失真函数编制优先级，使得从预失真模块发送的经处理的基带信号对应于功率放大器的发送功率。模型计算器还被配置为发送触发信号以指示何时开始从功率放大器获取数据以便更新预失真功能。系统中的触发模块被配置为接收触发信号并且在接收到触发信号时从功率放大器启动数据捕获。

4. 发明申请

US20140016725A1 METHOD FOR PRE-DISTORTING AND A PRE-DISTORTER 有权
标题翻译：预失真的方法和预反射器
公开(公告)号：US20140016725A1
公开(公告)日：2014-01-16
申请号：US14008143
申请日：2011-03-28
申请人： James Peroulas , Feng Zeng , Dongfang Ning , Zeliang Yang , Yijun Duan , Weiming Pan , Zhengjian Dai , Aimin You
发明人： James Peroulas , Feng Zeng , Dongfang Ning , Zeliang Yang , Yijun Duan , Weiming Pan , Zhengjian Dai , Aimin You
IPC分类号： H04B7/04
CPC分类号： H04B7/0456 , H03F1/3247 , H03F1/3258 , H03F3/189 , H03F3/24
摘要： The present invention discloses a pre-distorter, which comprises: a pre-distortion module, which is configured to pre-distort a plurality of baseband input signals by an equal number of pre-distortion functions to obtain equal number of pre-distorted signals respectively, wherein all of the baseband input signals input into every pre-distortion function, and each pre-distortion function has one output; an adder, which is configured to combine all of the pre-distorted signals output from every pre-distortion functions into one combined signal; and a power amplifier (PA), which is configure to amplify the combined signal, wherein the cascade of the pre-distortion functions and the PA are linear overall. And the present invention also discloses a method for distorting. The present invention reduces the implementation cost of a pre-distorer.
摘要翻译：本发明公开了一种预失真器，其包括：预失真模块，其被配置为通过相等数量的预失真函数来预失真多个基带输入信号，以分别获得相等数量的预失真信号，其中输入到每个预失真功能的每个预失真功能的所有基带输入信号都具有一个输出; 一个加法器，被配置为将从每个预失真函数输出的所有预失真信号组合成一个组合信号; 以及配置为放大组合信号的功率放大器（PA），其中预失真功能和PA的级联总体上是线性的。本发明还公开了一种变形方法。本发明降低了预先排除者的实施成本。

5. 发明申请

US20120020429A1 APPARATUS AND METHOD FOR COMPENSATING FOR CLIPPING POWER LOSSES 有权
标题翻译：用于补偿电源损耗的装置和方法
公开(公告)号：US20120020429A1
公开(公告)日：2012-01-26
申请号：US13255711
申请日：2009-03-09
申请人： James Peroulas , Qun Liao
发明人： James Peroulas , Qun Liao
IPC分类号： H04L27/00
CPC分类号： H04L27/2623
摘要： An apparatus and method for compensating for transmit power losses that are caused by the addition of a clipping or crest factor reduction module in the TX path of a communications system. The method includes applying a gain to a signal input into the crest factor reduction module, so that a power of a signal output from the crest factor reduction module is equal to a power of a signal output from a baseband signal generation module in the TX chain. The apparatus and method have the benefit that the peaks of the signal to be transmitted will be consistent over a wide range of TX power values.
摘要翻译：一种用于补偿在通信系统的TX路径中添加限幅或波峰因数降低模块引起的发射功率损耗的装置和方法。该方法包括对输入到波峰因数降低模块的信号应用增益，使得从波峰因数降低模块输出的信号的功率等于从TX链中的基带信号发生模块输出的信号的功率。该装置和方法具有以下优点：待传输的信号的峰值将在宽范围的TX功率值上是一致的。

6. 发明申请

US20140333377A1 CAPTURE BUFFER OF DIGITAL PREDISTORTION SYSTEMS 有权
标题翻译：数字预测系统的捕获缓冲
公开(公告)号：US20140333377A1
公开(公告)日：2014-11-13
申请号：US14348411
申请日：2011-04-19
申请人： James Peroulas , Aimin You , Qun Liao , Xiaowei Yan , Yiqun Mo , Zhaoquan Zeng
发明人： James Peroulas , Aimin You , Qun Liao , Xiaowei Yan , Yiqun Mo , Zhaoquan Zeng
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F3/195 , H03F3/24 , H03F2201/3227 , H04L27/367
摘要： An improved DPD system includes a predistortion module having at least one predistortion function. The predistortion module is configured to receive and subsequently process a baseband signal. The system also includes a power amplifier configured to receive the processed baseband signal from the predistortion module. The system further includes a model calculator configured to program priorities for predistortion functions so that the processed baseband signal transmitted from the predistortion module corresponds to the transmission power of the power amplifier. The model calculator is further configured to send a trigger signal to indicate when data capture from the power amplifier should begin so as to update the predistortion functions. A trigger module in the system is configured to receive the trigger signal and to initiate data capture from the power amplifier upon receipt of the trigger signal.
摘要翻译：改进的DPD系统包括具有至少一个预失真功能的预失真模块。预失真模块被配置为接收并随后处理基带信号。该系统还包括功率放大器，被配置为从预失真模块接收经处理的基带信号。该系统还包括：模型计算器，被配置为对预失真函数编制优先级，使得从预失真模块发送的经处理的基带信号对应于功率放大器的发送功率。模型计算器还被配置为发送触发信号以指示何时开始从功率放大器获取数据以便更新预失真功能。系统中的触发模块被配置为接收触发信号并且在接收到触发信号时从功率放大器启动数据捕获。

7. 发明授权

US08482349B2 Method and apparatus for linearizing a non-linear power amplifier 有权
标题翻译：用于线性化非线性功率放大器的方法和装置
公开(公告)号：US08482349B2
公开(公告)日：2013-07-09
申请号：US13255717
申请日：2009-03-09
申请人： James Peroulas , Aimin You
发明人： James Peroulas , Aimin You
IPC分类号： H03F1/26
CPC分类号： H03F1/3241 , H03F1/3247
摘要： An apparatus and method for linearizing a non-linear power amplifier. The method comprises: performing an iteration algorithm by using a desired output signal of the non-linear power amplifier, to calculate an input signal of the non-linear power amplifier, whereby with the calculated input signal of the non-linear power amplifier, the non-linear power amplifier is linearized. The apparatus and method can produce a signal on the output of the non-linear power amplifier with an arbitrarily high quality of performance.
摘要翻译：一种线性化非线性功率放大器的装置和方法。该方法包括：通过使用非线性功率放大器的期望的输出信号来执行迭代算法来计算非线性功率放大器的输入信号，由此通过计算的非线性功率放大器的输入信号，非线性功率放大器是线性化的。该装置和方法可以以非常高的性能质量在非线性功率放大器的输出上产生信号。

8. 发明申请

US20120170635A1 DYNAMICALLY ADJUSTED OFDM CHANNEL ESTIMATION FILTERING IN OFDM COMMUNICATIONS 有权
标题翻译： OFDM通信中的动态调整OFDM通道估计滤波
公开(公告)号：US20120170635A1
公开(公告)日：2012-07-05
申请号：US13339321
申请日：2011-12-28
申请人： James Peroulas
发明人： James Peroulas
IPC分类号： H04W72/04 , H04L27/28 , H04B1/10 , H04B3/46
CPC分类号： H04L25/0212 , H04L25/0224 , H04L27/2647
摘要： Techniques for performing channel estimation in an orthogonal frequency domain multiplexing (OFDM) communications system include receiving a plurality of reference signals on a plurality of subcarriers, performing channel estimation to obtain a plurality of raw channel estimates based on the received plurality of reference signals, determining a number of raw channel estimates to be used for a channel estimate refinement and calculating a refined channel estimate using the number of raw channel estimates from the plurality of raw channel estimates.
摘要翻译：用于在正交频域复用（OFDM）通信系统中执行信道估计的技术包括：在多个子载波上接收多个参考信号，执行信道估计以基于接收的多个参考信号获得多个原始信道估计，确定用于信道估计精化的许多原始信道估计，并且使用来自多个原始信道估计的原始信道估计的数量来计算精细信道估计。

9. 发明申请

US20120032739A1 DIGITAL PREDISTORTION CIRCUIT WITH EXTENDED OPERATING RANGE AND A METHOD THEREOF 审中-公开
标题翻译：具有扩展操作范围的数字预测电路及其方法
公开(公告)号：US20120032739A1
公开(公告)日：2012-02-09
申请号：US13255714
申请日：2009-03-09
申请人： James Peroulas , Zhengjian Dai
发明人： James Peroulas , Zhengjian Dai
IPC分类号： H03F1/26
CPC分类号： H03F3/245 , H03F1/3247 , H03F3/189 , H03F2200/451 , H04L25/49
摘要： A digital predistortion circuit and method with extended operating range includes a predistortion function, a D/A converter, a multiplier for performing frequency translation and a power amplifier. The digital predistortion circuit includes a multiplier for receiving a signal to be transmitted and a gain correction factor, multiplying the gain correction factor with the signal to be transmitted, and outputting a result of the multiplication to the predistortion function, as well as a device for calculating the gain correction factor by using a predetermined reference gain and an estimated gain of the power amplifier, and outputting the calculated gain correction factor to the multiplier, whereby a gain of the power amplifier is quickly corrected. The digital predistortion circuit and the method thereof produce acceptable results for a more expanded range of TX power levels.
摘要翻译：具有扩展工作范围的数字预失真电路和方法包括预失真功能，D / A转换器，用于执行频率转换的乘法器和功率放大器。数字预失真电路包括用于接收要发送的信号的乘法器和增益校正因子，将增益校正因数与要发送的信号相乘，并将乘法结果输出到预失真函数，以及用于通过使用预定的参考增益和功率放大器的估计增益来计算增益校正因子，并将所计算的增益校正因子输出到乘法器，从而快速校正功率放大器的增益。数字预失真电路及其方法为TX功率电平的更大范围提供可接受的结果。

10. 发明授权

US09184814B2 Method for pre-distorting and a pre-distorter 有权
标题翻译：预失真的方法和预失真
公开(公告)号：US09184814B2
公开(公告)日：2015-11-10
申请号：US14008143
申请日：2011-03-28
申请人： James Peroulas , Feng Zeng , Dongfang Ning , Zeliang Yang , Yijun Duan , Weiming Pan , Zhengjian Dai , Aimin You
发明人： James Peroulas , Feng Zeng , Dongfang Ning , Zeliang Yang , Yijun Duan , Weiming Pan , Zhengjian Dai , Aimin You
IPC分类号： H04B7/04 , H03F1/32 , H03F3/189 , H03F3/24
CPC分类号： H04B7/0456 , H03F1/3247 , H03F1/3258 , H03F3/189 , H03F3/24
摘要： The document discloses a pre-distorter, which comprises: a pre-distortion module, which is configured to pre-distort a plurality of baseband input signals by an equal number of pre-distortion functions to obtain an equal number of pre-distorted signals respectively, wherein all of the baseband input signals input into every pre-distortion function, and each pre-distortion function has one output; an adder, which is configured to combine all of the pre-distorted signals output from every pre-distortion function into one combined signal; and a power amplifier (PA), which is configured to amplify the combined signal, wherein the cascade of the pre-distortion functions and the PA are linear overall. And the document also discloses a method for distorting. The document reduces the implementation cost of a pre-distorter.
摘要翻译：该文献公开了一种预失真器，其包括：预失真模块，其被配置为通过相等数量的预失真函数来预失真多个基带输入信号，以分别获得相等数量的预失真信号，其中输入到每个预失真功能的每个预失真功能的所有基带输入信号都具有一个输出; 加法器，被配置为将从每个预失真函数输出的所有预失真信号组合成一个组合信号; 以及功率放大器（PA），其被配置为放大组合信号，其中预失真功能和PA的级联总体上是线性的。该文件还公开了一种扭曲的方法。该文件降低了预失真器的实施成本。

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