公开(公告)号：US20050105597A1

公开(公告)日：2005-05-19

申请号：US10876160

申请日：2004-06-23

申请人： Syang-Myau Hwang ,  Yiping Fan ,  Chen-Yi Chang ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Syang-Myau Hwang ,  Yiping Fan ,  Chen-Yi Chang ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H04B1/69 ,  H04B1/707 ,  H04J11/00 ,  H04L25/06 ,  H04L27/14

CPC分类号： H04J13/00 ,  H04B1/709 ,  H04B1/7097 ,  H04L25/061 ,  H04L27/142

摘要： In a spread spectrum system, methods and despreader architectures for despreading the received spreaded codes with the use of a single correlator and a single correlation code is provided. Before despreading the incoming received spreaded codes, a single correlation code is generated using a symbol from a set of symbols that has been mapped into a set of differential encoded PN codes. Despreading output samples for each received spreaded code are obtained by correlating the received spreaded code with this single correlation code. Correlation is accomplished by multiplying each received sample of the received spreaded codes with the correlation code samples and accumulating the products of this multiplication. After correlation, the index for the maximum or minimum peak of the despreading output samples for each code is identified. This index can then be mapped into a symbol corresponding to the transmitted information. Corresponding despreader architectures comprise of a number of taps attached to a series of shift registers. Received samples of each received spreaded codes are inputted into the shift registers. The despreader architectures accumulates the products of multiplication of the value of the shift register with a predetermined value associated with each tap to produce the despreading output samples of a received spreaded code. It identifies the despreading output index producing the maximum of the absolute value of the despreading output and maps said index into a symbol corresponding to the transmitted information.

摘要翻译： 在扩展频谱系统中，提供了使用单个相关器和单个相关码解扩接收的扩展码的方法和解扩器体系结构。 在解扩输入的接收的扩展码之前，使用已经被映射到一组差分编码的PN码的符号集合中的符号来生成单个相关码。 通过将接收到的扩展代码与该单个相关代码相关联来获得每个接收到的扩展代码的解扩输出样本。 通过将接收到的扩展码的每个接收样本与相关代码采样相乘并累加该乘法的乘积来实现相关。 在相关之后，识别每个代码的解扩输出样本的最大或最小峰值的索引。 然后可以将该索引映射到对应于发送的信息的符号。 相应的解扩器架构包括附接到一系列移位寄存器的多个抽头。 每个接收的分散码的接收样本被输入到移位寄存器中。 解扩器架构将移位寄存器的值乘以与每个抽头相关联的预定值的乘积累积以产生接收到的扩展代码的解扩输出样本。 它识别解扩输出索引，产生解扩输出的绝对值的最大值，并将所述索引映射成对应于发送信息的符号。

公开(公告)号：US07424047B2

公开(公告)日：2008-09-09

申请号：US10712643

申请日：2003-11-13

申请人： Yiping Fan ,  Syang-Myau Hwang ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Yiping Fan ,  Syang-Myau Hwang ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H04B1/00

CPC分类号： H04B1/7097 ,  H04B1/709 ,  H04J13/00 ,  H04L25/061 ,  H04L27/142

摘要： A spread spectrum receiver whose de-spreading process based on transformed spreading codes is provided. Instead of de-spreading with original spreading codes, this approach de-spreads received signal with the spreading codes transformed from the original codes in order to eliminate the negative impact of system impairments such as frequency offset to a spread spectrum receiver. Before de-spreading with the transformed code, the received signal goes through the same transformation as the original codes do. After a transformation, the transformed codes may exist some undesirable property such as spreading code having DC content. An approach is given to cancel unwanted side effects relating the transformed spreading codes. The approaches are very effective for spread spectrum system based on frequency modulation scheme such as MSK. For this kind of system, the frequency offset translates to DC offset after the transformation and the DC offset can be cancel since the DC property of the transformed spreading code is known in advance.

摘要翻译： 一种扩展频谱接收机，其基于变换的扩频码进行解扩处理。 代替使用原始扩展码去扩展，该方法使用从原始码转换的扩展码对接收信号进行解扩，以消除诸如频率偏移对扩频接收机的系统损伤的负面影响。 在使用变换后的代码进行解扩后，接收到的信号经过与原始代码相同的转换。 在变换之后，变换的代码可能存在一些不期望的属性，例如具有DC内容的扩展码。 给出了一种解决与转换的扩展码有关的不必要的副作用的方法。 这种方法对于基于MSK等频率调制方案的扩频系统非常有效。 对于这种系统，频率偏移转换为变换后的DC偏移，并且可以取消DC偏移，因为转换的扩展码的DC属性预先已知。

公开(公告)号：US07366227B2

公开(公告)日：2008-04-29

申请号：US10876160

申请日：2004-06-23

申请人： Syang-Myau Hwang ,  Yiping Fan ,  Chen-Yi Chang ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Syang-Myau Hwang ,  Yiping Fan ,  Chen-Yi Chang ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H04B1/00

CPC分类号： H04J13/00 ,  H04B1/709 ,  H04B1/7097 ,  H04L25/061 ,  H04L27/142

摘要： In a spread spectrum system, methods and despreader architectures for despreading the received spreaded codes with the use of a single correlator and a single correlation code is provided. Before despreading the incoming received spreaded codes, a single correlation code is generated using a symbol from a set of symbols that has been mapped into a set of differential encoded PN codes. Despreading output samples for each received spreaded code are obtained by correlating the received spreaded code with this single correlation code. Correlation is accomplished by multiplying each received sample of the received spreaded codes with the correlation code samples and accumulating the products of this multiplication. After correlation, the index for the maximum or minimum peak of the despreading output samples for each code is identified. This index can then be mapped into a symbol corresponding to the transmitted information. Corresponding despreader architectures comprise of a number of taps attached to a series of shift registers. Received samples of each received spreaded codes are inputted into the shift registers. The despreader architectures accumulates the products of multiplication of the value of the shift register with a predetermined value associated with each tap to produce the despreading output samples of a received spreaded code. It identifies the despreading output index producing the maximum of the absolute value of the despreading output and maps said index into a symbol corresponding to the transmitted information.

摘要翻译： 在扩展频谱系统中，提供了使用单个相关器和单个相关码解扩接收的扩展码的方法和解扩器体系结构。 在解扩输入的接收的扩展码之前，使用已经被映射到一组差分编码的PN码的符号集合中的符号来生成单个相关码。 通过将接收到的扩展代码与该单个相关代码相关联来获得每个接收到的扩展代码的解扩输出样本。 通过将接收到的扩展码的每个接收样本与相关代码采样相乘并累加该乘法的乘积来实现相关。 在相关之后，识别每个代码的解扩输出样本的最大或最小峰值的索引。 然后可以将该索引映射到对应于发送的信息的符号。 相应的解扩器架构包括附接到一系列移位寄存器的多个抽头。 每个接收的分散码的接收样本被输入到移位寄存器中。 解扩器架构将移位寄存器的值乘以与每个抽头相关联的预定值的乘积累积以产生接收到的扩展代码的解扩输出样本。 它识别解扩输出索引，产生解扩输出的绝对值的最大值，并将所述索引映射成对应于发送信息的符号。

公开(公告)号：US20050105596A1

公开(公告)日：2005-05-19

申请号：US10712643

申请日：2003-11-13

申请人： Yiping Fan ,  Syang-Myau Hwang ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Yiping Fan ,  Syang-Myau Hwang ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H04B1/69 ,  H04B1/707 ,  H04J11/00 ,  H04L25/06 ,  H04L27/14

CPC分类号： H04B1/7097 ,  H04B1/709 ,  H04J13/00 ,  H04L25/061 ,  H04L27/142

摘要： A spread spectrum receiver whose de-spreading process based on transformed spreading codes is provided. Instead of de-spreading with original spreading codes, this approach de-spreads received signal with the spreading codes transformed from the original codes in order to eliminate the negative impact of system impairments such as frequency offset to a spread spectrum receiver. Before de-spreading with the transformed code, the received signal goes through the same transformation as the original codes do. After a transformation, the transformed codes may exist some undesirable property such as spreading code having DC content. An approach is given to cancel unwanted side effects relating the transformed spreading codes. The approaches are very effective for spread spectrum system based on frequency modulation scheme such as MSK. For this kind of system, the frequency offset translates to DC offset after the transformation and the DC offset can be cancel since the DC property of the transformed spreading code is known in advance.

摘要翻译： 一种扩展频谱接收机，其基于变换的扩频码进行解扩处理。 代替使用原始扩展码去扩展，该方法使用从原始码转换的扩展码对接收信号进行解扩，以消除诸如频率偏移对扩频接收机的系统损伤的负面影响。 在使用变换后的代码进行解扩后，接收到的信号经过与原始代码相同的转换。 在变换之后，变换的代码可能存在一些不期望的属性，例如具有DC内容的扩展码。 给出了一种解决与转换的扩展码有关的不必要的副作用的方法。 这种方法对于基于MSK等频率调制方案的扩频系统非常有效。 对于这种系统，频率偏移转换为变换后的DC偏移，并且可以取消DC偏移，因为转换的扩展码的DC属性预先已知。

公开(公告)号：US07408395B2

公开(公告)日：2008-08-05

申请号：US10428444

申请日：2003-05-01

申请人： Kanyu Cao ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Kanyu Cao ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H03L5/00

CPC分类号： H04L25/0296

摘要： Fast settling circuits and methods designed to align input signal amplitude level and to remove DC offset voltages with minimal loss of low frequency signal in receiving analog circuits are disclosed. With the key innovative circuits and methods for signal peak alignment, the disclosed circuits and methods achieve fast settling without significant attenuation of the input signal. Peak aligning circuits and methods can be implemented along with conventional RC AC coupling circuits. In applying the aligning circuits and methods to differential signal pair, DC offsets can be easily removed.

摘要翻译： 公开了用于调整输入信号幅度电平的快速稳定电路和方法，并且在接收模拟电路中以最小的低频信号损失去除DC偏移电压。 利用用于信号峰对准的关键创新电路和方法，所公开的电路和方法实现快速建立，而没有输入信号的显着衰减。 峰值对准电路和方法可以与传统的RC AC耦合电路一起实现。 在将对准电路和方法应用于差分信号对时，可以容易地去除直流偏移。

公开(公告)号：US07271647B2

公开(公告)日：2007-09-18

申请号：US11209914

申请日：2005-08-22

申请人： Kanyu Mark Cao ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Kanyu Mark Cao ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H03K5/00 ,  H04B1/10

CPC分类号： H03H11/22 ,  H03H2007/0192 ,  H03H2011/0494

摘要： The present invention provides methods and apparatuses for a polyphase filter, comprising: a first and second cascoded differential amplifiers configured to receive a first and second differential signals, the first cascoded differential amplifier having a first resistor coupled between current legs of the first cascoded differential amplifier and the second cascoded differential amplifier having a first capacitor coupled between current legs of the second cascoded differential amplifier; and a third and fourth cascoded differential amplifiers configured to receive said first and said second differential signals, the third cascoded differential amplifier having a second resistor coupled between current legs of the third cascoded differential amplifier and the fourth cascoded differential amplifier having a second capacitor coupled between current legs of the fourth cascoded differential amplifier; wherein the first and second cascoded differential amplifiers are configured to provide a first differential output in response to the first and second differential signals and the third and fourth cascoded differential amplifiers are configured to provide a second differential output in response to the first and second differential signals.

摘要翻译： 本发明提供了一种多相滤波器的方法和装置，包括：配置成接收第一和第二差分信号的第一和第二级联差分放大器，第一级联差分放大器具有耦合在第一级联差分放大器的电流端之间的第一电阻器 并且所述第二级联差分放大器具有耦合在所述第二级联差分放大器的电流支路之间的第一电容器; 以及第三和第四级联差分放大器，被配置为接收所述第一和所述第二差分信号，所述第三级联差分放大器具有耦合在所述第三级联差分放大器的电流支路之间的第二电阻器和所述第四级联型差分放大器， 第四级差分放大器的电流端; 其中所述第一和第二级联差分放大器被配置为响应于所述第一和第二差分信号而提供第一差分输出，并且所述第三和第四级联差分放大器被配置为响应于所述第一和第二差分信号而提供第二差分输出 。

公开(公告)号：US20070040605A1

公开(公告)日：2007-02-22

申请号：US11209912

申请日：2005-08-22

申请人： Yiping Fan ,  Chang-Yu Wang ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Yiping Fan ,  Chang-Yu Wang ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H03K5/00

CPC分类号： H03H7/0153 ,  H03H2210/043 ,  H03J5/244 ,  H03J2200/10

摘要： The present invention provides methods and apparatuses for a shared filter transceiving system. A shared filter transceiving system having a capacitor bank to adjust the time constant of the shared filter comprises a first input configured to receive a first signal. The capacitor bank is coupled to the first input having a plurality of selectable capacitors including a reference capacitor. A second input is coupled to the capacitor bank configured to receive a second signal. A configurable switch is coupled to the capacitor bank configured to couple a first selectable capacitor with the reference capacitor when the first input is active and couple a second selectable capacitor with the second reference capacitor when the second input is active. The second selectable capacitor is a predetermined offset value of the first selectable capacitor.

摘要翻译： 本发明提供了一种用于共享过滤器收发系统的方法和装置。 具有用于调节共享滤波器的时间常数的电容器组的共享滤波器收发系统包括被配置为接收第一信号的第一输入。 电容器组耦合到具有包括参考电容器的多个可选择电容器的第一输入端。 第二输入耦合到被配置为接收第二信号的电容器组。 可配置开关耦合到电容器组，其被配置为当第一输入有效时将第一可选择电容器与参考电容器耦合，并且当第二输入有效时将第二可选择电容器与第二参考电容器耦合。 第二可选择电容器是第一可选择电容器的预定偏移值。

公开(公告)号：US07365604B2

公开(公告)日：2008-04-29

申请号：US11303358

申请日：2005-12-16

申请人： Sifen Luo ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Sifen Luo ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H03F3/04

CPC分类号： H03F1/30 ,  H03F3/189 ,  H03F2200/108 ,  H03F2200/18 ,  H03F2200/451

摘要： The present invention provides methods and apparatuses for an amplifier circuit for amplifying an input signal. An amplifier circuit for amplifying an input signal comprises an amplifying transistor circuit having a power transistor and a dc bias circuit having a plurality of current mirror circuits and a discharge transistor wherein the discharge transistor and the power transistor form a combined current mirror circuit to control quiescent current in the power transistor.

摘要翻译： 本发明提供了用于放大输入信号的放大器电路的方法和装置。 用于放大输入信号的放大器电路包括具有功率晶体管的放大晶体管电路和具有多个电流镜电路和放电晶体管的直流偏置电路，其中放电晶体管和功率晶体管形成组合电流镜电路以控制静止 功率晶体管中的电流。

公开(公告)号：US20070139120A1

公开(公告)日：2007-06-21

申请号：US11303358

申请日：2005-12-16

申请人： Sifen Luo ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Sifen Luo ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H03F3/04

CPC分类号： H03F1/30 ,  H03F3/189 ,  H03F2200/108 ,  H03F2200/18 ,  H03F2200/451

摘要： The present invention provides methods and apparatuses for an amplifier circuit for amplifying an input signal. An amplifier circuit for amplifying an input signal comprises an amplifying transistor circuit having a power transistor and a dc bias circuit having a plurality of current mirror circuits and a discharge transistor wherein the discharge transistor and the power transistor form a combined current mirror circuit to control quiescent current in the power transistor.

摘要翻译： 本发明提供了用于放大输入信号的放大器电路的方法和装置。 用于放大输入信号的放大器电路包括具有功率晶体管的放大晶体管电路和具有多个电流镜电路和放电晶体管的直流偏置电路，其中放电晶体管和功率晶体管形成组合电流镜电路以控制静止 功率晶体管中的电流。

公开(公告)号：US20070040604A1

公开(公告)日：2007-02-22

申请号：US11209914

申请日：2005-08-22

申请人： Kanyu Cao ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

发明人： Kanyu Cao ,  Yiping Fan ,  Hongyu Li ,  Chieh-Yuan Chao

IPC分类号： H03K5/00

CPC分类号： H03H11/22 ,  H03H2007/0192 ,  H03H2011/0494

摘要： The present invention provides methods and apparatuses for a polyphase filter, comprising: a first and second cascoded differential amplifiers configured to receive a first and second differential signals, the first cascoded differential amplifier having a first resistor coupled between current legs of the first cascoded differential amplifier and the second cascoded differential amplifier having a first capacitor coupled between current legs of the second cascoded differential amplifier; and a third and fourth cascoded differential amplifiers configured to receive said first and said second differential signals, the third cascoded differential amplifier having a second resistor coupled between current legs of the third cascoded differential amplifier and the fourth cascoded differential amplifier having a second capacitor coupled between current legs of the fourth cascoded differential amplifier; wherein the first and second cascoded differential amplifiers are configured to provide a first differential output in response to the first and second differential signals and the third and fourth cascoded differential amplifiers are configured to provide a second differential output in response to the first and second differential signals.