公开(公告)号：EP1332552B1

公开(公告)日：2009-01-14

申请号：EP01992057.8

申请日：2001-11-03

申请人： QUALCOMM INCORPORATED

发明人： MOHSENI, Jafar, M. ,  BUTLER, Brian, K. ,  JOHN, Deepu ,  ZHANG, Haitao

IPC分类号： H03H17/02 ,  H03H17/06

CPC分类号： H03H17/0657 ,  H03H17/0226 ,  H03H17/0238 ,  H03H17/06 ,  H03H17/0607

摘要： A system for digital filtering includes a set of logic gates, a state storage, and a multiplexer. The state storage includes two or more storage banks and may also include combinatorial logic and/or at least one lookup table. In one application, a filtering operation according to a finite-impulse-response filter coefficient vector is performed without runtime multiplications. Applications to symmetric and antisymmetric filter coefficient vectors are described, as well as applications to filter coefficient vectors of arbitrary odd or even length.

公开(公告)号：EP1665692A1

公开(公告)日：2006-06-07

申请号：EP04781093.2

申请日：2004-08-12

申请人： QUALCOMM INCORPORATED ,  Zhang, Haitao

发明人： ZHANG, Haitao

IPC分类号： H04L25/02

CPC分类号： H04L25/0212 ,  H04B1/707 ,  H04B1/709 ,  H04L25/023

摘要： A method and apparatus for estimating a communication channel impulse response h(t) is disclosed. The method comprises the steps of generating a data sequence di having a constrained portion cdi associated with at least two codes w0, w1 , wherein a correlation Acode of the constrained portion cd1 with one of the codes w0, w1 is characterized by a maximum value k=0 at less than maximum values at k≠0 ; generating a chip sequence cj having a chip period Tc as the data sequence spread by a spreading sequence Si of length N; generating com(t)=co(t+mNTc) for m=0,1,···,M by correlating a received signal r(t) with the spreading sequence Si , wherein the received signal r(t)comprises the chip sequence cj applied to the communication channel; and generating an estimated communication channel impulse response ĥM (t)as a combination of com (t) and dm for m=0,1,···,M. .

公开(公告)号：EP1264411A2

公开(公告)日：2002-12-11

申请号：EP01916349.2

申请日：2001-03-02

申请人： QUALCOMM INCORPORATED

发明人： YOUNIS, Saed ,  SIMIC, Emilija ,  WILBORN, Thomas ,  ZHANG, Haitao ,  FILIPOVIC, Daniel ,  KAUFMAN, Ralph ,  LIN, Jian

IPC分类号： H04B1/00

CPC分类号： H03G3/3042 ,  H03F2203/7239 ,  H03G1/0088

摘要： Transmitter architectures for a communications system having improved performance over conventional transmitter architectures. The improvements include a combination of the following: faster response time for the control signals, improved linearity, reduced interference, reduced power consumption, lower circuit complexity, and lower costs. For a cellular application, these improvements can lead to increased system capacity, smaller telephone size, increased talk and standby times, and greater acceptance of the product. Circuitry is provided to speed up the response time of a control signal. The control loop for various elements in the transmit signal path are integrated. A gain control mechanism allows for accurate adjustment of the output transmit power level. Control mechanisms are provided to power down the power amplifier, or th e entire transmit signal path, when not needed. The gains of the various elements in the transmit signal path are controlled to reduce transients in the output transmit power, and to also ensure that transients are downward.

公开(公告)号：EP1264411B1

公开(公告)日：2009-11-11

申请号：EP01916349.2

申请日：2001-03-02

申请人： QUALCOMM INCORPORATED

发明人： YOUNIS, Saed ,  SIMIC, Emilija ,  WILBORN, Thomas ,  ZHANG, Haitao ,  FILIPOVIC, Daniel ,  KAUFMAN, Ralph ,  LIN, Jian

IPC分类号： H04B1/00

CPC分类号： H03G3/3042 ,  H03F2203/7239 ,  H03G1/0088

摘要： Transmitter architectures for a communications system having improved performance over conventional transmitter architectures. The improvements include a combination of the following: faster response time for the control signals, improved linearity, reduced interference, reduced power consumption, lower circuit complexity, and lower costs. For a cellular application, these improvements can lead to increased system capacity, smaller telephone size, increased talk and standby times, and greater acceptance of the product. Circuitry is provided to speed up the response time of a control signal. The control loop for various elements in the transmit signal path are integrated. A gain control mechanism allows for accurate adjustment of the output transmit power level. Control mechanisms are provided to power down the power amplifier, or th e entire transmit signal path, when not needed. The gains of the various elements in the transmit signal path are controlled to reduce transients in the output transmit power, and to also ensure that transients are downward.

公开(公告)号：EP1119922B1

公开(公告)日：2007-01-03

申请号：EP99954885.2

申请日：1999-10-12

申请人： QUALCOMM INCORPORATED

发明人： BUTLER, Brian, K. ,  ZHANG, Haitao ,  TIEDEMANN, Edward, G., Jr. ,  ZOU, Qiuzhen ,  SIH, Gilbert, C. ,  AGRAWAL, Avneesh

IPC分类号： H04B1/707 ,  H04Q7/32

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： 描述了用于执行寻呼的新颖且改进的方法。 在本发明的一个实施例中，搜索器用于检测扩频信号。 将接收到的射频信号样本存储在样本缓冲区中。 在待机模式下，样本在分配给移动台的寻呼时隙期间收集。 对样本执行一组搜索，并且如果检测到导频信号，则执行额外的解调以检测寻呼消息。 所得到的一组解调数据可以被组合以增加检测。 在检测到寻呼消息之后，可以激活附加的解调资源以处理更完整的寻呼消息或其他信息信道。 在本发明的一个实施例中，搜索器包括解调器，以执行快速页面检测而不使用手指元素来减少空闲模式功耗。

公开(公告)号：EP1066559B1

公开(公告)日：2005-06-08

申请号：EP99911150.3

申请日：1999-03-04

申请人： QUALCOMM INCORPORATED

发明人： SIH, Gilbert, C. ,  ZOU, Quizhen ,  JHA, Sanjay, K. ,  KANG, Inyup ,  LIN, Jian ,  MOTIWALA, Quaeed ,  JOHN, Deepu ,  ZHANG, Li ,  ZHANG, Haitao ,  LEE, Way-Shing ,  SAKAMAKI, Charles, E. ,  KANTAK, Prashant, A.

IPC分类号： G06F9/30 ,  G06F9/38

CPC分类号： G06F12/0886 ,  G06F9/30036 ,  G06F9/30105 ,  G06F9/30112 ,  G06F9/3012 ,  G06F9/30141 ,  G06F9/30149 ,  G06F9/3016 ,  G06F9/30167 ,  G06F9/3816 ,  G06F9/3885 ,  G06F9/3893 ,  G06F15/7807

公开(公告)号：EP1350337A2

公开(公告)日：2003-10-08

申请号：EP02714725.5

申请日：2002-01-11

申请人： QUALCOMM INCORPORATED

发明人： RICK, Roland, R. ,  PATEL, Shimman ,  SAINTS, Keith ,  ZHANG, Haitao

IPC分类号： H04B1/707

CPC分类号： H04B1/7085 ,  H04B1/7117 ,  H04B7/0697

摘要： An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, provides advanced control over the time-tracking of demodulation elements (30A-30N) when unresolvable multipath situations arise. The apparatus provides merge protection that prevents clustered demodulation elements from contracting beyond a minimum time span. In addition, the apparatus provides a master/slave feature for synchronizing the time-tracking of the demodulation elements when clustered around a multipath signal.

公开(公告)号：EP1327311A2

公开(公告)日：2003-07-16

申请号：EP01987972.5

申请日：2001-10-16

申请人： QUALCOMM INCORPORATED

发明人： BUTLER, Brian, K. ,  ZHANG, Haitao ,  BENDER, Paul, E. ,  JOU ,Yu-Cheun

IPC分类号： H04B1/707

CPC分类号： H04B1/7107

摘要： Techniques for canceling pilot interference in a wireless (e.g., CDMA) communication system. A received signal typically includes a number of signal instances (i.e., multipaths). For each multipath desired to be processed, the other multipaths act as interference on the desired multipath. If the pilot is generated based on a known data pattern (e.g., all zeros) and covered with a known channelization code (e.g., a Walsh code of zero), then the pilot in an interfering multipath may be estimated as the spreading sequence at a time offset corresponding to the arrival time of that multipath. The pilot interference from each interference multipath may be estimated based on the spreading sequence for the interfering multipath and the despreading sequence for the desired multipath. The total pilot interference from a number of interfering multipaths may be subtracted from the data component in the desired multipath to provide pilot-canceled data having improved performance.

摘要翻译： 用于消除无线（例如，CDMA）通信系统中的导频干扰的技术。 接收的信号通常包括多个信号实例（即，多路径）。 对于需要处理的每个多路径，其他多路径对期望的多路径起干扰作用。 如果基于已知数据模式（例如，全零）生成导频并且用已知信道化码（例如，零的沃尔什码）覆盖导频，则可以将干扰多径中的导频估计为 时间偏移对应于该多路径的到达时间。 可以基于干扰多径的扩频序列和期望多径的解扩序列来估计来自每个干扰多径的导频干扰。 可以从所需多径中的数据分量中减去来自多个干扰多径的总导频干扰，以提供具有改进性能的导频消除数据。

公开(公告)号：EP1245102A1

公开(公告)日：2002-10-02

申请号：EP00982277.6

申请日：2000-11-29

申请人： QUALCOMM INCORPORATED

发明人： MOHSENI, Mohammad, Jafar ,  BUTLER, Brian ,  JOHN, Deepu ,  ZHANG, Haitao

IPC分类号： H04L27/18

CPC分类号： H04L27/206 ,  H04L27/2082

摘要： In applications employing phase-shift keying modulation, a phase rotator (200, 202) as disclosed herein is used to rotate the constellation of signal vectors before carrier modulation in order to maximize modulator output power. Such a rotator (200, 202) may be applied in the digital domain (to complex signals having either binary-valued or multi-valued components) or in the analog domain.

公开(公告)号：EP1665692B1

公开(公告)日：2010-09-29

申请号：EP04781093.2

申请日：2004-08-12

申请人： QUALCOMM INCORPORATED

发明人： ZHANG, Haitao

IPC分类号： H04L25/02

CPC分类号： H04L25/0212 ,  H04B1/707 ,  H04B1/709 ,  H04L25/023

摘要： A method and apparatus for estimating a communication channel impulse response h(t) is disclosed. The method comprises the steps of generating a data sequence di having a constrained portion cdi associated with at least two codes w0, w1 , wherein a correlation Acode of the constrained portion cd1 with one of the codes w0, w1 is characterized by a maximum value k=0 at less than maximum values at k≠0 ; generating a chip sequence cj having a chip period Tc as the data sequence spread by a spreading sequence Si of length N; generating com(t)=co(t+mNTc) for m=0,1,···,M by correlating a received signal r(t) with the spreading sequence Si , wherein the received signal r(t)comprises the chip sequence cj applied to the communication channel; and generating an estimated communication channel impulse response ĥM (t)as a combination of com (t) and dm for m=0,1,···,M. .