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。

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。

公开(公告)号：US20050017983A1

公开(公告)日：2005-01-27

申请号：US10784113

申请日：2004-02-20

申请人： Qun Liao ,  Zhou Hong

发明人： Qun Liao ,  Zhou Hong

IPC分类号： G06F15/80 ,  G06K9/56 ,  G06T15/20 ,  G09G5/00

CPC分类号： G06T15/04

摘要： A method of cubic mapping with texturing is described. Neighboring pixels on an object are mapped to adjacent faces of the cube, but these adjacent faces do not guarantee continuity in the texture mip-map associated with each face. Therefore, the u and v texture map coordinates are adjusted after mapping to adjacent faces to make a continuity adjustment that insures that the LOD for the texture mip-map is the same for each adjacent face. The continuity adjustment includes either switching the u coordinate with the v coordinate or negating one of the coordinates or both. Additionally, if the u and v coordinates are normalized, the normalization may be compensated by adding or subtracting unity from the adjusted coordinate. After the continuity adjustment is made an approximation to the derivative is computed and used to determine the LOD for the mip-map. Texturing can then proceed using the LOD.

摘要翻译： 描述了一种使用纹理进行立体映射的方法。 对象上的相邻像素映射到立方体的相邻面，但是这些相邻的面不能保证与每个面相关联的纹理mip-map的连续性。 因此，在映射到相邻的面之后调整u和v纹理贴图坐标以进行连续性调整，以确保纹理mip-map的LOD对于每个相邻的面是相同的。 连续性调整包括将u坐标与v坐标切换或否定坐标之一或两者。 此外，如果u和v坐标被归一化，则归一化可以通过从调整的坐标中加或减一个单位来补偿。 在进行连续性调整后，计算导数的近似值，并用于确定mip-map的LOD。 然后可以使用LOD进行纹理化。

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。

公开(公告)号：US08731104B2

公开(公告)日：2014-05-20

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功率值下是一致的。