公开(公告)号：US06584313B2

公开(公告)日：2003-06-24

申请号：US09828588

申请日：2001-04-05

申请人： Brian K. Butler ,  Haitao Zhang ,  Edward G. Tiedemann, Jr. ,  Qiuzhen Zou ,  Gilbert C. Sih ,  Avneesh Agrawal

发明人： Brian K. Butler ,  Haitao Zhang ,  Edward G. Tiedemann, Jr. ,  Qiuzhen Zou ,  Gilbert C. Sih ,  Avneesh Agrawal

IPC分类号： H04Q720

CPC分类号： H04B1/70751 ,  H04B1/7077 ,  H04B1/70775 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04W52/0229 ,  Y02D70/40

摘要： A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.

摘要翻译： 描述了一种用于执行寻呼的新颖和改进的方法。 在本发明的一个实施例中，搜索器用于检测扩频信号。 样品接收的RF信号存储在样品缓冲液中。 在待机模式期间，在分配给移动台的寻呼时隙期间收集采样。 对样本执行一组搜索，并且如果检测到导频信号，则执行附加解调以检测寻呼消息。 可以组合所得到的解调数据集以增加检测。 在检测到页面消息之后，可以激活附加解调资源以处理更完整的页面消息或其他信息信道。 在本发明的一个实施例中，搜索器包括一个解调器，用于执行快速页面检测，而无需使用手指元件来减少空闲模式功耗。

公开(公告)号：US06496920B1

公开(公告)日：2002-12-17

申请号：US09044088

申请日：1998-03-18

申请人： Qiuzhen Zou ,  Gilbert C. Sih ,  Jian Lin

发明人： Qiuzhen Zou ,  Gilbert C. Sih ,  Jian Lin

IPC分类号： G06F900

CPC分类号： G06F9/30109 ,  G06F9/30014 ,  G06F9/30032 ,  G06F9/30043 ,  G06F9/30141 ,  G06F9/30149 ,  G06F9/3016 ,  G06F9/30167 ,  G06F9/3816 ,  G06F9/3824 ,  G06F9/3826 ,  G06F9/3853 ,  G06F9/3885 ,  G06F9/3893 ,  G06F12/04 ,  G06F15/7857

摘要： A method and circuit for digital signal processing. The disclosed method and circuit uses a variable length instruction set. A portion of the variable length instructions may be stored in adjacent locations within memory. The beginning and ending of instructions may occur across memory word boundaries. Instructions may contain variable numbers of instruction fragments that cause a particular operation to be performed. The disclosed circuit has a set of three data buses over which data may be exchanged with a register bank and three data memories. Data buses include one wide bus and two narrow buses. The wide bus is coupled to a wide data memory and the two narrow buses are coupled to two narrow data memories. Additionally, the disclosed circuit has a register bank that is accessible by at least two processing units. The disclosed circuit further includes an instruction fetch unit that receives instructions of variable length stored in an instruction memory. An instruction memory is separate from the set of three data memories.

摘要翻译： 一种用于数字信号处理的方法和电路。 所公开的方法和电路使用可变长度指令集。 可变长度指令的一部分可以存储在存储器内的相邻位置。 指令的开始和结束可能跨越存储器字边界发生。 指令可能包含导致执行特定操作的可变数目的指令片段。 所公开的电路具有一组三个数据总线，数据可以通过该数据总线与寄存器组和三个数据存储器交换。 数据总线包括一条宽公共汽车和两条窄车。 宽总线耦合到宽数据存储器，并且两个窄总线耦合到两个窄数据存储器。 此外，所公开的电路具有可由至少两个处理单元访问的寄存器组。 所公开的电路还包括指令提取单元，其接收存储在指令存储器中的可变长度的指令。 指令存储器与三组数据存储器分开。

公开(公告)号：US07502911B2

公开(公告)日：2009-03-10

申请号：US11535005

申请日：2006-09-25

申请人： Gilbert C. Sih ,  Qiuzhen Zou ,  Jian Lin

发明人： Gilbert C. Sih ,  Qiuzhen Zou ,  Jian Lin

IPC分类号： G06F9/30

CPC分类号： G06F9/30109 ,  G06F9/30014 ,  G06F9/30032 ,  G06F9/30043 ,  G06F9/30141 ,  G06F9/30149 ,  G06F9/3016 ,  G06F9/30167 ,  G06F9/3816 ,  G06F9/3824 ,  G06F9/3826 ,  G06F9/3853 ,  G06F9/3885 ,  G06F9/3893 ,  G06F12/04 ,  G06F15/7857

摘要： A digital signal processor uses a variable length instruction set. The variable length instructions may be stored in adjacent locations within memory space. The beginning and ending of instructions may, but are not required to, occur across memory word boundaries. Preferably, the variable length instructions contain variable numbers of instruction fragments. Each instruction fragment causes a particular operation (or operations) to be performed, thereby allowing multiple operations to be performed during each clock cycle. This reduces the total number of clock cycles necessary to perform a task.

摘要翻译： 数字信号处理器使用可变长度指令集。 可变长度指令可以存储在存储器空间内的相邻位置。 指令的开始和结束可以但不是要求跨越存储器字边界发生。 优选地，可变长度指令包含可变数目的指令片段。 每个指令片段导致执行特定的操作（或操作），从而允许在每个时钟周期期间执行多个操作。 这减少了执行任务所需的总时钟周期数。

公开(公告)号：US06243561B1

公开(公告)日：2001-06-05

申请号：US09172068

申请日：1998-10-13

申请人： Brian K. Butler ,  Haitao Zhang ,  Edward G. Tiedemann, Jr. ,  Qiuzhen Zou ,  Gilbert C. Sih ,  Avneesh Agrawal

发明人： Brian K. Butler ,  Haitao Zhang ,  Edward G. Tiedemann, Jr. ,  Qiuzhen Zou ,  Gilbert C. Sih ,  Avneesh Agrawal

IPC分类号： H04L2706

CPC分类号： H04B1/70751 ,  H04B1/7077 ,  H04B1/70775 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04W52/0229 ,  Y02D70/40

摘要： A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.

摘要翻译： 描述了一种用于执行寻呼的新颖和改进的方法。 在本发明的一个实施例中，搜索器用于检测扩频信号。 样本接收的RF信号被存储在样本缓冲器中。 在待机模式期间，在分配给移动台的寻呼时隙期间收集采样。 对样本执行一组搜索，并且如果检测到导频信号，则执行附加解调以检测寻呼消息。 可以组合所得到的解调数据集以增加检测。 在检测到页面消息之后，可以激活附加解调资源以处理更完整的页面消息或其他信息信道。 在本发明的一个实施例中，搜索器包括一个解调器，用于执行快速页面检测，而无需使用手指元件来减少空闲模式功耗。

公开(公告)号：US06154101A

公开(公告)日：2000-11-28

申请号：US198079

申请日：1998-11-23

申请人： Qiuzhen Zou ,  Gilbert C. Sih ,  Avneesh Agrawal

发明人： Qiuzhen Zou ,  Gilbert C. Sih ,  Avneesh Agrawal

IPC分类号： G06F7/58 ,  H03K3/84 ,  H04B7/26 ,  H04J13/00 ,  H04J13/10 ,  H03B29/00

CPC分类号： H04J13/0022 ,  G06F7/582 ,  H04J13/10

摘要： A novel and improved method and apparatus for a fast-slewing pseudorandom noise sequence generator is described. One or more loadable PN generators are controlled by a DSP or microprocessor in conjunction with a free-running counter which maintains a reference offset count. The PN generator will typically be part of a finger or searcher. The DSP or microprocessor may assist in other finger or searcher functions as well as the slew function, and can control one or more fingers and/or searchers. Each PN generator is comprised of a loadable linear feedback shift register (LFSR) or its equivalent, a loadable counter for maintaining an index of the state of that particular PN generator, and a slew control device capable of receiving a slew command and controlling the LFSR and index counter to enact an advance or a retard of a certain offset distance.

摘要翻译： 描述了一种用于快速回转伪随机噪声序列发生器的新颖和改进的方法和装置。 一个或多个可加载的PN发生器由DSP或微处理器与自由运行的计数器结合来维持参考偏移计数来控制。 PN发生器通常是手指或搜索器的一部分。 DSP或微处理器可以协助其他手指或搜索器功能以及转换功能，并且可以控制一个或多个手指和/或搜索器。 每个PN发生器由可装载的线性反馈移位寄存器（LFSR）或其等效物组成，用于维持该特定PN发生器的状态的索引的可装载计数器以及能够接收转换命令并控制LFSR的转换控制装置 和索引计数器来产生某个偏移距离的提前或延迟。

公开(公告)号：US06208292B1

公开(公告)日：2001-03-27

申请号：US09150093

申请日：1998-09-09

申请人： Gilbert C. Sih ,  Qiuzhen Zou

发明人： Gilbert C. Sih ,  Qiuzhen Zou

IPC分类号： H04B726

CPC分类号： G01S19/235 ,  G01S19/246 ,  G01S2205/008

摘要： The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment of the invention comprises a method of performing position location in a wireless subscriber unit having a local oscillator, including the steps of receiving a position location request, acquiring a timing signal when a sufficient period of time has elapsed since the local oscillator has been corrected and correcting said local oscillator using a correction signal based on said timing signal, substantially freezing the correction signal, performing a position location procedure using the local oscillator with the correction signal applied, and ending said position location procedure.

公开(公告)号：US06211820B1

公开(公告)日：2001-04-03

申请号：US09150075

申请日：1998-09-09

申请人： Qiuzhen Zou ,  Gilbert C. Sih ,  Brian S. Edmonston

发明人： Qiuzhen Zou ,  Gilbert C. Sih ,  Brian S. Edmonston

IPC分类号： G01S514

CPC分类号： G01S19/29 ,  G01S5/0036 ,  G01S5/0063 ,  G01S19/235 ,  G01S19/246 ,  G01S19/254 ,  G01S19/256 ,  G01S19/30 ,  G01S2205/008

摘要： The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. In one embodiment the invention comprises a method for performing position location in a subscriber unit in a CDMA wireless communications system having a base station, including the step of receiving a position location request during a communication, entering a position location mode, transmitting frames to the base station while performing a position location procedure, and returning to communications mode when said position location procedure has been completed.

摘要翻译： 本发明是一种用于在无线通信系统中执行位置定位的新颖且改进的方法和装置。 在一个实施例中，本发明包括一种用于在具有基站的CDMA无线通信系统中的用户单元中执行位置定位的方法，所述CDMA无线通信系统包括在通信期间接收位置定位请求的步骤，进入位置定位模式，向 基站，同时执行位置定位过程，并且当所述位置定位过程已经完成时返回到通信模式。

公开(公告)号：US06480529B1

公开(公告)日：2002-11-12

申请号：US09468556

申请日：1999-12-21

申请人： Gilbert C. Sih ,  Ian Fevrier ,  Inyup Kang ,  Christopher Patrick

发明人： Gilbert C. Sih ,  Ian Fevrier ,  Inyup Kang ,  Christopher Patrick

IPC分类号： H04B1500

CPC分类号： H04B1/7093 ,  G06F17/15 ,  H04B2201/70711

摘要： A novel and improved method and apparatus for searching is described. This searcher combines the ability to search multiple offsets of single pilots, such as those found in the IS-95 system, with the ability to search multiple pilots, such as those found in a GPS location determination system. Both types of searching can be done in a single architecture combining the parallel computation features of a matched filter with the flexibility of allowing a variable number of coherent accumulations and a variable number of non-coherent accumulations to be performed at high speed for a wide range of search hypotheses in a resource efficient manner. This invention allows for parallel use of the matched filter structure in a time-sliced manner to search multiple windows. In addition, the searcher allows for optional independent Walsh decovering for each search window. The time-sharing approach allows for optional frequency searching of any offset.

摘要翻译： 描述了一种新颖的，改进的搜索方法和装置。 该搜索者组合搜索诸如在IS-95系统中发现的单个导频的多个偏移的能力，具有搜索多个导频的能力，例如在GPS位置确定系统中发现的那些。 两种类型的搜索可以在单个架构中完成，该结构将匹配滤波器的并行计算特征与允许可变数量的相干累加的灵活性并且可变数量的非相干累加在高范围内进行宽范围 的资源有效的搜索假设。 本发明允许以时间分割的方式并行使用匹配的滤波器结构来搜索多个窗口。 此外，搜索器允许为每个搜索窗口选择独立的沃尔什解密。 时间分配方法允许任意偏移量的可选频率搜索。

公开(公告)号：US5920834A

公开(公告)日：1999-07-06

申请号：US834397

申请日：1997-01-31

申请人： Gilbert C. Sih ,  Anthony P. Mauro

发明人： Gilbert C. Sih ,  Anthony P. Mauro

IPC分类号： H04M1/60 ,  H04B3/20 ,  H04B3/23 ,  G10L3/02

CPC分类号： H04B3/23

摘要： A method and apparatus for controlling various functional elements in a digital telephone system using state determination from an echo canceller. An echo canceller is used to evaluate which one of five talk states two speakers are engaged in during a telephone conversation. This state determination information is used to control a tone detector function, a noise suppressor function, an adaptive equalizer function, a transmission mute function, and a vocoder encoder function within a vocoder. During the talk state where the far-end speaker is active and the near-end speaker is inactive, the echo canceller provides a signal which disables background noise estimates from being performed in the noise suppressor and the vocoder encoder. The same signal is used to disable the tone detector and to enable the transmission mute function during this talk state.

摘要翻译： 一种使用来自回波消除器的状态确定来控制数字电话系统中的各种功能元件的方法和装置。 回声消除器用于评估在电话交谈期间两个扬声器参与的五个通话状态中的哪一个。 该状态确定信息用于控制声码器内的音调检测器功能，噪声抑制器功能，自适应均衡器功能，传输静音功能和声码器编码器功能。 在远端扬声器有效并且近端扬声器无效的通话状态期间，回声消除器提供禁止在噪声抑制器和声码器编码器中执行背景噪声估计的信号。 相同的信号用于禁用音调检测器，并在此通话状态期间启用传输静音功能。

公开(公告)号：US5732134A

公开(公告)日：1998-03-24

申请号：US783768

申请日：1997-01-15

申请人： Gilbert C. Sih

发明人： Gilbert C. Sih

IPC分类号： H04B3/23 ,  H04M9/08 ,  H04M1/20

CPC分类号： H04M9/082 ,  H04B3/234

摘要： A method and apparatus are described for detecting doubletalk in an acoustic echo canceller. The present invention examines the spectral characteristic of the near-end audio signal and the spectral characteristics of the far-end audio signal and determines from the comparison if a condition of doubletalk exists. An exemplary implementaion of the present invention is presented in an acoustic echo canceller wherein the adaptation of the adaptive filter taps is inhibited during periods of doubletalk.

摘要翻译： 描述了一种用于在声学回声消除器中检测doubletalk的方法和装置。 本发明检查近端音频信号的频谱特性和远端音频信号的频谱特性，并从比较确定是否存在doubletalk的条件。 本发明的示例性实施方式在声学回声消除器中呈现，其中自适应滤波器抽头的适应在双脉冲周期期间被禁止。