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1. 发明授权

US07366137B2 Signal-to-noise estimation in wireless communication devices with receive diversity 失效
标题翻译：具有接收分集的无线通信设备中的信噪比估计
公开(公告)号：US07366137B2
公开(公告)日：2008-04-29
申请号：US10448815
申请日：2003-05-31
申请人： Farrokh Abrishamkar , Brian Banister , Gilbert C. Sih , Thunyachate Ekvetchavit
发明人： Farrokh Abrishamkar , Brian Banister , Gilbert C. Sih , Thunyachate Ekvetchavit
IPC分类号： H04Q7/00
CPC分类号： H04B1/1027 , H04B17/336 , H04W52/143 , H04W52/241 , H04W52/248
摘要： This disclosure is directed to techniques for estimating signal-to-noise ratio (SNR) of signals received by a wireless communication device. The techniques take advantage of spatial receive diversity in a wireless communication device to achieve accurate estimates of SNR. In general, a spatial projection wiener filter function can be applied to incoming symbol estimates to support efficient computation of SNR. The estimated SNR can be used to produce power control commands for use in forward power control.
摘要翻译：本公开涉及用于估计由无线通信设备接收的信号的信噪比（SNR）的技术。这些技术利用无线通信设备中的空间接收分集来实现SNR的准确估计。通常，空间投影维纳滤波函数可以应用于输入符号估计，以支持SNR的有效计算。估计的SNR可用于产生用于正向功率控制的功率控制命令。

2. 发明授权

US06529850B2 Apparatus and method of velocity estimation 有权
公开(公告)号：US06529850B2
公开(公告)日：2003-03-04
申请号：US09776128
申请日：2001-02-01
申请人： Thomas Brian Wilborn , Shimman Patel , Gilbert C. Sih , Farrokh Abrishamkar
发明人： Thomas Brian Wilborn , Shimman Patel , Gilbert C. Sih , Farrokh Abrishamkar
IPC分类号： G06F1500
CPC分类号： G01S11/02
摘要： A velocity estimate is determined from a received signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope values are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.

3. 发明授权

US07457630B2 Data boundary aware base station assisted position location 有权
标题翻译：数据边界感知基站辅助位置定位
公开(公告)号：US07457630B2
公开(公告)日：2008-11-25
申请号：US09956325
申请日：2001-09-18
申请人： Qiuzhen Zou , Gilbert C. Sih , Inyup Kang
发明人： Qiuzhen Zou , Gilbert C. Sih , Inyup Kang
IPC分类号： H04Q7/20
CPC分类号： G01S5/0036 , G01S19/235 , G01S19/254 , G01S19/258 , G01S19/30
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 for performing position location on a subscriber unit in a terrestrial wireless telephone system using a set of satellites each transmitting a signal, the terrestrial wireless telephone system having base stations, including the steps of transmitting an aiding message from the base station to the subscriber unit, said aiding message containing information regarding a data boundary for each signal from the set of satellites, applying correlation codes to each signal yielding corresponding correlation data and accumulating said correlation data over an first interval preceding a corresponding data boundary yielding a first accumulation result, and a second interval following said corresponding data boundary yielding a second accumulation result.
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。本发明的一个实施例包括一种用于在陆地无线电话系统中的用户单元上执行位置定位的方法，该方法使用一组发射信号的卫星，具有基站的地面无线电话系统包括以下步骤：从基站到用户单元，所述辅助消息包含关于来自卫星组的每个信号的数据边界的信息，将相关代码应用于产生相应相关数据的每个信号，并在对应的数据边界之前的第一间隔上累加所述相关数据产生第一累积结果，并且在所述对应数据边界之后的第二间隔产生第二累积结果。

4. 发明授权

US06208292B1 Position location with low tolerance oscillator 有权
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.

5. 发明授权

US06195041B1 Reliable position location in memory limited environment 有权
标题翻译：可靠的位置在记忆体有限的环境中
公开(公告)号：US06195041B1
公开(公告)日：2001-02-27
申请号：US09150409
申请日：1998-09-09
申请人： William Gardner , Avneesh Agrawal , Gilbert C. Sih , Qiuzhen Zou , Inyup Kang
发明人： William Gardner , Avneesh Agrawal , Gilbert C. Sih , Qiuzhen Zou , Inyup Kang
IPC分类号： G01S502
CPC分类号： G01S19/235 , G01S5/0036 , G01S5/0063 , G01S19/246 , G01S19/254 , G01S19/256 , G01S19/29 , 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 comprises a method for performing position location in a wireless communication system using a set of signals transmitted from a set of satellites including the steps of receiving signal samples, rotating an acquisition code by a first rotation amount yielding a rotated acquisition code, despreading said signal samples using rotated acquisition code yielding despread data, accumulating said despread data over a first duration yielding partially accumulated data, rotating said partially accumulated data by a second rotation amount yielding rotated data and accumulating said rotated data.
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。一个实施例包括一种用于在使用从一组卫星发送的一组信号的无线通信系统中执行位置定位的方法，包括以下步骤：接收信号样本，使采集码旋转第一旋转量产生旋转采集码，解扩所述使用旋转获取码的信号样本产生解扩数据，在第一持续时间内积累所述解扩数据产生部分累积的数据，将所述部分累积的数据旋转第二旋转量，产生旋转数据并累加所述旋转的数据。

6. 发明授权

US5920834A Echo canceller with talk state determination to control speech processor functional elements in a digital telephone system 失效
标题翻译：具有通话状态确定的回波消除器来控制数字电话系统中的语音处理器功能元件
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。

7. 发明授权

US5732134A Doubletalk detection by means of spectral content 失效
标题翻译：通过光谱内容进行双曲线检测
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。

8. 发明授权

US5546459A Variable block size adaptation algorithm for noise-robust acoustic echo cancellation 失效
标题翻译：用于噪声鲁棒声学回声消除的可变块大小自适应算法
公开(公告)号：US5546459A
公开(公告)日：1996-08-13
申请号：US146644
申请日：1993-11-01
申请人： Gilbert C. Sih , Franklin P. Antonio
发明人： Gilbert C. Sih , Franklin P. Antonio
IPC分类号： H03H21/00 , H04B3/23 , H04M9/08
CPC分类号： H04B3/23 , H03H21/0012
摘要： An apparatus that automatically adjusts the adaptation block size for a least-mean square (LMS) adaptive filter depending on the input signal-to-noise ratio (SNR) is disclosed. The apparatus monitors the instantaneous SNR and continually adjusts the block size to provide high noise immunity, thereby increasing the convergence speed of the filter and decreasing the asymptotic mean-square error. An exemplary embodiment of the present invention is presented in the context of acoustic echo cancellation, though it is noted that the adaptive filter of the present invention is useful in any environment in which the noise characteristics are subject to change.
摘要翻译：公开了一种根据输入信噪比（SNR）自动调整最小均方（LMS）自适应滤波器的自适应块大小的装置。该装置监视瞬时信噪比，并持续调整块大小，提供高噪声抗扰度，从而提高滤波器的收敛速度，并减小渐近均方误差。尽管要注意的是本发明的自适应滤波器在噪声特性可能改变的任何环境中都是有用的，但本发明的示例性实施例在声学回声消除的上下文中呈现。

9. 发明授权

US07502911B2 Variable length instruction fetching that retrieves second instruction in dependence upon first instruction length 有权
标题翻译：可变长度指令读取，其根据第一指令长度检索第二指令
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。

10. 发明授权

US07236177B2 Processing digital video data 有权
标题翻译：处理数字视频数据
公开(公告)号：US07236177B2
公开(公告)日：2007-06-26
申请号：US10006044
申请日：2001-12-04
申请人： Gilbert C. Sih , Yushi Tian
发明人： Gilbert C. Sih , Yushi Tian
IPC分类号： G06F12/06 , G06F13/00
CPC分类号： H04N19/423 , H04N19/43 , H04N19/503 , H04N19/61
摘要： In general, the invention is directed toward a device for processing digital video data, such as an encoder, a decoder or an encoder/decoder (CODEC). The device makes use of an innovative architecture in which functionality is partitioned between an embedded processor, a digital signal processor and dedicated hardware to achieve increased performance. In addition, the device includes a programmable video direct memory access (VDMA) controller to retrieve video data from memory in response to a command specifying a multidimensional block of video data.
摘要翻译：通常，本发明涉及用于处理数字视频数据的装置，诸如编码器，解码器或编码器/解码器（CODEC）。该设备利用了一种创新的架构，其中功能在嵌入式处理器，数字信号处理器和专用硬件之间进行分区，以实现更高的性能。此外，该设备包括可编程视频直接存储器访问（VDMA）控制器，以响应于指定视频数据的多维块的命令来从存储器检索视频数据。

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