公开(公告)号：US07986931B2

公开(公告)日：2011-07-26

申请号：US11736008

申请日：2007-04-17

申请人： Chih-Hung Lin ,  Chin-Fu Li ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

发明人： Chih-Hung Lin ,  Chin-Fu Li ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

IPC分类号： H04B7/00

CPC分类号： G06K7/0008 ,  G06K7/10346

摘要： An echo cancellation circuit for an RFID reader and the method thereof are provided. The echo cancellation circuit includes a gain calculator, a gain adjustment circuit, and a subtraction circuit. The gain calculator provides a complex gain value according to a carrier signal and a received signal through an adaptive algorithm. The gain adjustment circuit is coupled to the gain calculator. The gain adjustment circuit multiplies the carrier signal by the complex gain value, and outputs the result of the multiplication. The subtraction circuit is coupled to the gain adjustment circuit. The subtraction circuit subtracts the output of the gain adjustment circuit from the received signal, and then provides the result of the subtraction as the output signal of the echo cancellation circuit.

摘要翻译： 提供了一种用于RFID读取器的回波消除电路及其方法。 回波消除电路包括增益计算器，增益调整电路和减法电路。 增益计算器通过自适应算法根据载波信号和接收信号提供复数增益值。 增益调整电路耦合到增益计算器。 增益调整电路将载波信号乘以复数增益值，并输出乘法结果。 减法电路耦合到增益调整电路。 减法电路从接收信号中减去增益调整电路的输出，然后将减法结果作为回波消除电路的输出信号。

公开(公告)号：US20080136645A1

公开(公告)日：2008-06-12

申请号：US11736008

申请日：2007-04-17

申请人： Chih-Hung Lin ,  Chin-Fu Li ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

发明人： Chih-Hung Lin ,  Chin-Fu Li ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

IPC分类号： G08B1/08

CPC分类号： G06K7/0008 ,  G06K7/10346

摘要： An echo cancellation circuit for an RFID reader and the method thereof are provided. The echo cancellation circuit includes a gain calculator, a gain adjustment circuit, and a subtraction circuit. The gain calculator provides a complex gain value according to a carrier signal and a received signal through an adaptive algorithm. The gain adjustment circuit is coupled to the gain calculator. The gain adjustment circuit multiplies the carrier signal by the complex gain value, and outputs the result of the multiplication. The subtraction circuit is coupled to the gain adjustment circuit. The subtraction circuit subtracts the output of the gain adjustment circuit from the received signal, and then provides the result of the subtraction as the output signal of the echo cancellation circuit.

摘要翻译： 提供了一种用于RFID读取器的回波消除电路及其方法。 回波消除电路包括增益计算器，增益调整电路和减法电路。 增益计算器通过自适应算法根据载波信号和接收信号提供复数增益值。 增益调整电路耦合到增益计算器。 增益调整电路将载波信号乘以复数增益值，并输出乘法结果。 减法电路耦合到增益调整电路。 减法电路从接收信号中减去增益调整电路的输出，然后将减法结果作为回波消除电路的输出信号。

公开(公告)号：US07742547B2

公开(公告)日：2010-06-22

申请号：US11752309

申请日：2007-05-23

申请人： Chih-Hung Lin ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

发明人： Chih-Hung Lin ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

IPC分类号： H04L27/06

CPC分类号： G06K7/0008 ,  H04L7/042

摘要： A method and a system for reading radio frequency identification (RFID) tags are provided. The method includes the following steps. First, receive a tag signal from the RFID tag. Recover a data clock rate from the tag signal according to statistics of pulse lengths of the tag signal. Next, determine a frame synchronization point of a data frame following a preamble in the tag signal by a signal correlation between the preamble and a predetermined signal pattern according to the data clock rate. Finally, decode the data frame by using an adaptive Viterbi algorithm on an extended trellis diagram. The extended trellis diagram includes a plurality of nodes and a plurality of branches connecting the nodes. The nodes and the branches are arranged according to the modulation scheme of the data frame and possible variations of the data clock rate.

摘要翻译： 提供了一种用于读取射频识别（RFID）标签的方法和系统。 该方法包括以下步骤。 首先，从RFID标签接收标签信号。 根据标签信号的脉冲长度的统计，从标签信号中恢复数据时钟速率。 接下来，根据数据时钟速率，通过前导码和预定信号模式之间的信号相关来确定标签信号中的前导码之后的数据帧的帧同步点。 最后，通过在扩展网格图上使用自适应维特比算法对数据帧进行解码。 扩展网格图包括多个节点和连接节点的多个分支。 节点和分支根据数据帧的调制方案和数据时钟速率的可能变化进行排列。

公开(公告)号：US20080129505A1

公开(公告)日：2008-06-05

申请号：US11752309

申请日：2007-05-23

申请人： Chih-Hung Lin ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

发明人： Chih-Hung Lin ,  Chia-Jen Yu ,  Jiunn-Tsair Chen

IPC分类号： G08B13/14

CPC分类号： G06K7/0008 ,  H04L7/042

摘要： A method and a system for reading radio frequency identification (RFID) tags are provided. The method includes the following steps. First, receive a tag signal from the RFID tag. Recover a data clock rate from the tag signal according to statistics of pulse lengths of the tag signal. Next, determine a frame synchronization point of a data frame following a preamble in the tag signal by a signal correlation between the preamble and a predetermined signal pattern according to the data clock rate. Finally, decode the data frame by using an adaptive Viterbi algorithm on an extended trellis diagram. The extended trellis diagram includes a plurality of nodes and a plurality of branches connecting the nodes. The nodes and the branches are arranged according to the modulation scheme of the data frame and possible variations of the data clock rate.

摘要翻译： 提供了一种用于读取射频识别（RFID）标签的方法和系统。 该方法包括以下步骤。 首先，从RFID标签接收标签信号。 根据标签信号的脉冲长度的统计，从标签信号中恢复数据时钟速率。 接下来，根据数据时钟速率，通过前导码和预定信号模式之间的信号相关来确定标签信号中的前导码之后的数据帧的帧同步点。 最后，通过在扩展网格图上使用自适应维特比算法对数据帧进行解码。 扩展网格图包括多个节点和连接节点的多个分支。 节点和分支根据数据帧的调制方案和数据时钟速率的可能变化进行排列。

公开(公告)号：US07385425B1

公开(公告)日：2008-06-10

申请号：US11675087

申请日：2007-02-15

申请人： Chin-Fu Li ,  Chih-Hung Lin ,  Jiunn-Tsair Chen

发明人： Chin-Fu Li ,  Chih-Hung Lin ,  Jiunn-Tsair Chen

IPC分类号： H03K19/094 ,  H03K3/00

CPC分类号： H03K19/09441

摘要： A printed circuit unit implementing with organic transistors is provided. The printed circuit unit includes an input signal circuit, a load circuit and a level shifter. The input signal circuit includes N serially connected organic transistors. When one of the serially connected organic transistors is cut-off, the signal input circuit is cut-off, so that the circuit is maintained to output a correct voltage level. The level shifter circuit includes an organic transistor having a gate for receiving the input signal. The organic transistor can also serve as a load for improving a gain of the level shifter.

摘要翻译： 提供了一种用有机晶体管实现的印刷电路单元。 印刷电路单元包括输入信号电路，负载电路和电平转换器。 输入信号电路包括N个串联连接的有机晶体管。 当串联连接的有机晶体管中的一个截止时，信号输入电路被截止，使得电路被保持以输出正确的电压电平。 电平移位器电路包括具有用于接收输入信号的栅极的有机晶体管。 有机晶体管也可以用作改善电平移位器的增益的负载。

公开(公告)号：US07733978B2

公开(公告)日：2010-06-08

申请号：US11420482

申请日：2006-05-26

申请人： Chih-Hung Lin ,  Jiunn-Tsair Chen

发明人： Chih-Hung Lin ,  Jiunn-Tsair Chen

IPC分类号： H04K1/02

CPC分类号： H03F1/3247 ,  H03F2201/3233

摘要： A digital adaptive predistorter look up table (DAPD-LUT) technique dynamically adapts a look up table (LUT) an LUT spacing for linearizing a power amplifier (PA). It optimizes the LUT spacing for the PA without prior knowledge of system state information. A size-N LUT divides a whole unsaturated PA input amplitude range into N bins, each predistorted by an entry of the LUT. The LUT is indexed by an input amplitude of a modulated signal via an index mapper to implement an unconditionally non-uniform LUT spacing. A spacing adaptor online interactively adapts the LUT spacing. The adapted LUT spacing balances the inter-modulation distortion (IMD) power at the PA output corresponding to each bin, so that the total IMD power at the PA output is minimized. This dynamically-optimum technique is practical, robust, and with low complexity.

摘要翻译： 数字自适应预失真器查找表（DAPD-LUT）技术动态地将查找表（LUT）用于线性化功率放大器（PA）的LUT间隔。 它优化了PA的LUT间距，而无需系统状态信息的知识。 尺寸N LUT将整个不饱和PA输入幅度范围划分为N个存储区，每个存储块由LUT的条目预失真。 LUT通过索引映射器的调制信号的输入幅度进行索引，以实现无条件不均匀的LUT间隔。 在线间距适配器交互式地适应LUT间隔。 适配的LUT间隔平衡对应于每个仓的PA输出端的互调失真（IMD）功率，使得PA输出端的总IMD功率最小化。 这种动态优化的技术是实用的，稳健的，复杂度低的。

公开(公告)号：US20070273439A1

公开(公告)日：2007-11-29

申请号：US11420482

申请日：2006-05-26

申请人： Chih-Hung Lin ,  Jiunn-Tsair Chen

发明人： Chih-Hung Lin ,  Jiunn-Tsair Chen

IPC分类号： H03G3/20

CPC分类号： H03F1/3247 ,  H03F2201/3233

摘要： This invention is about a DAPD-LUT technique of dynamically adapting an LUT spacing for linearizing a power amplifier (PA). It optimizes the LUT spacing for the PA without prior knowledge of system state information. A size-N LUT divides a whole unsaturated PA input amplitude range into N bins, each predistorted by an entry of the LUT. The LUT is indexed by an input amplitude of a modulated signal via an index mapper to implement an unconditionally non-uniform LUT spacing. A spacing adaptor online interactively adapts the LUT spacing. The adapted LUT spacing balances the IMD power at the PA output corresponding to each bin, so that the total IMD power at the PA output is minimized. This dynamically-optimum technique is practical, robust, and with low complexity.

摘要翻译： 本发明涉及动态地适应用于线性化功率放大器（PA）的LUT间隔的DAPD-LUT技术。 它优化了PA的LUT间距，而无需系统状态信息的知识。 尺寸N LUT将整个不饱和PA输入幅度范围划分为N个存储区，每个存储块由LUT的条目预失真。 LUT通过索引映射器的调制信号的输入幅度进行索引，以实现无条件不均匀的LUT间隔。 在线间距适配器交互式地适应LUT间隔。 适应的LUT间隔平衡与每个仓相对应的PA输出处的IMD功率，使得PA输出端的总IMD功率最小化。 这种动态最优的技术是实用的，稳健的，复杂度低的。

公开(公告)号：USD919403S1

公开(公告)日：2021-05-18

申请号：US29715575

申请日：2019-12-03

申请人： Chih-Hung Lin

设计人： Chih-Hung Lin

公开(公告)号：US20190023480A1

公开(公告)日：2019-01-24

申请号：US15654822

申请日：2017-07-20

申请人： Chih-Hung Lin

发明人： Chih-Hung Lin

IPC分类号： B65D81/38 ,  B65D81/34 ,  B65D30/08 ,  B29C65/00

摘要： A foldable cushion bag includes a main body and a handling unit. The main body includes a bottom wall and a sleeve wall jointed to the bottom wall. The bottom wall and the sleeve wall form a first heat sealed joint therebetween and cooperatively define a space for receiving a bottle. Each of the bottom and sleeve walls includes a multilayered structure having an outermost protecting layer, a first adhesive layer, a heat sealing layer, a second adhesive layer and an innermost cushion layer in that order. The handling unit is connected to the sleeve wall and opposite to the bottom wall. The handling unit is formed with a gripping hole.

公开(公告)号：USD722847S1

公开(公告)日：2015-02-24

申请号：US29490850

申请日：2014-05-14

申请人： Chih-Hung Lin

设计人： Chih-Hung Lin