公开(公告)号：US6028883A

公开(公告)日：2000-02-22

申请号：US883162

申请日：1997-06-26

Applicant: Jerome Johnson Tiemann ,  Daniel David Harrison

Inventor： Jerome Johnson Tiemann ,  Daniel David Harrison

IPC: G01S1/00 ,  G01S5/00 ,  G01S5/14 ,  G01S19/24 ,  G01S19/37 ,  G06F17/15 ,  H04B1/16 ,  H04B1/707 ,  H04B1/708 ,  H04B1/709 ,  H04B1/7107 ,  H04B15/00

CPC classification number: H04B1/708 ,  G01S19/09 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S5/0027 ,  G01S5/0036 ,  G06F17/15 ,  H04B1/707 ,  H04B1/709 ,  H04B1/71075 ,  G01S19/42 ,  G01S5/0054 ,  H04B2201/70709 ,  H04W52/0283

Abstract: A direct sequence spread spectrum architecture permits low power consumption during a synchronization phase of data reception by allowing the receiver to be turned off during most of the acquisition phase of reception, or by using a parallel correlator to keep acquisition time short. The architecture is particularly suitable for global positioning satellite (GPS) signal processing and permits multiple satellite codes and multiple Doppler bins to be searched either sequentially, without requiring the receiver to be turned on during the search process. The receiver output baseband data is sampled and stored over a time interval sufficient to achieve acquisition and synchronization for any one code division multiple access (CDMA) signal at any specific Doppler shift. This sample is digitally recorded and re-played from memory as many times as may be required to acquire and synchronize each desired CDMA signal. To keep processing energy consumption low, an analog (capacitor-based) cross-correlator is used. The order of coherent and non-coherent processing for all code-Doppler channels is chosen to maximize energy efficiency while minimizing required processor hardware.

Abstract translation: 直接序列扩展频谱架构允许在数据接收的同步阶段期间通过允许接收机在接收的大部分接收阶段期间关闭接收机，或通过使用并行相关器来保持采集时间短的低功耗。 该架构特别适用于全球定位卫星（GPS）信号处理，并允许依次搜索多个卫星码和多个多普勒频段，而不需要在搜索过程中接收接收机。 接收机输出基带数据被采样并存储在足以实现任何特定多普勒频移处的任何一个码分多址（CDMA）信号的采集和同​​步的时间间隔。 该采样数据记录并从存储器再次播放，可能需要多次以获得并同步每个期望的CDMA信号。 为了保持处理能耗低，使用了模拟（基于电容器的）互相关器。 选择所有代码多普勒通道的相干和非相干处理的顺序，以最大限度地提高能源效率，同时最小化所需的处理器硬件。

公开(公告)号：US6009118A

公开(公告)日：1999-12-28

申请号：US883163

申请日：1997-06-26

Applicant: Jerome Johnson Tiemann ,  Daniel David Harrison

Inventor： Jerome Johnson Tiemann ,  Daniel David Harrison

IPC: G01S1/00 ,  G01S5/00 ,  G01S5/14 ,  G01S19/24 ,  G01S19/37 ,  G06F17/15 ,  H04B1/16 ,  H04B1/708 ,  H04B1/709 ,  H04B1/7107 ,  H04B1/707

CPC classification number: H04B1/708 ,  G01S19/09 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S5/0027 ,  G01S5/0036 ,  G06F17/15 ,  H04B1/709 ,  H04B1/71075 ,  G01S19/42 ,  G01S5/0054 ,  H04B2201/70709 ,  H04W52/0283

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. The signal sample is read from memory as necessary to process the signal without further signal acquisition. The correlator calculates an inner product by simultaneously correlating each bit of the sample with a corresponding bit of a replica signal. If the inner product does not exceed a threshold value the correlator calculates another inner product between the same signal sample and another replica signal. This occurs until all available signals are identified. In one embodiment, memory is segmented and each segment is read by a separate correlator allowing faster identification of one signal or multiple signals to be acquired simultaneously. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

Abstract translation: 直接序列扩频接收机对输入信号进行采样并将样本存储在存储器中。 根据需要从存储器读取信号样本，以处理信号而无需进一步的信号采集。 相关器通过将样本的每个位与副本信号的相应位同时相关来计算内积。 如果内积不超过阈值，则相关器计算相同信号样本与另一副本信号之间的另一内积。 直到所有可用的信号被识别才发生。 在一个实施例中，存储器被分段，并且每个段由单独的相关器读取，允许更快地识别要同时获取的一个信号或多个信号。 这样的接收机在全球定位卫星（GPS）信号处理中是有用的，其中输入信号包含用CDMA编码编码的几个卫星传输。

公开(公告)号：US5974038A

公开(公告)日：1999-10-26

申请号：US864784

申请日：1997-05-29

Applicant: Guoliang Shou ,  Changming Zhou ,  Xuping Zhou ,  Makoto Yamamoto ,  Sunao Takatori

Inventor： Guoliang Shou ,  Changming Zhou ,  Xuping Zhou ,  Makoto Yamamoto ,  Sunao Takatori

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/7093 ,  H04B1/7115 ,  H04L7/00 ,  H04B7/216

CPC classification number: H04B1/708 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70709

Abstract: This invention reduces electric power consumption of a CDMA communication system receiver while it is in the wait mode. A received spread spectrum signal is demodulated in multiplication means into baseband signals Ri and Rq, and inputted into a complex matched filter. This filter is intermittently driven by supply voltage control means to perform acquisition of received signals. When an electric power calculation circuit detects the output of the filter to reach a peak equal to or greater than a predetermined value, the received signals undergo acquisition by controlling n number of correlators 26-1 to 26-n to work by a correlator controlling circuit. Moreover, de-spreading is performed. The outputs from each correlator 46-1 to 26-n are given to a RAKE combiner and demodulated by the RAKE by a combining and demodulating circuit.

Abstract translation: 本发明在CDMA通信系统接收机处于等待模式时降低电力消耗。 接收的扩频信号在乘法装置中被解调为基带信号Ri和Rq，并输入到复匹配滤波器中。 该滤波器由电源电压控制装置间歇地驱动，以执行接收信号的采集。 当电力计算电路检测到滤波器的输出达到等于或大于预定值的峰值时，通过控制n个相关器26-1至26-n来由相关器控制电路工作来接收接收的信号 。 此外，进行解扩。 来自每个相关器46-1至26-n的输出被提供给RAKE组合器，并由RAKE通过组合和解调电路进行解调。

公开(公告)号：US5910944A

公开(公告)日：1999-06-08

申请号：US808555

申请日：1997-02-28

Applicant: Mark J. Callicotte ,  Brian D. Storm

Inventor： Mark J. Callicotte ,  Brian D. Storm

IPC: H04B7/26 ,  H04B1/16 ,  H04W52/02 ,  H04W52/42 ,  H04J13/04

CPC classification number: H04B1/70756 ,  H04W52/0216 ,  H04B2201/70701 ,  H04B2201/70709 ,  H04W52/0258 ,  Y02B60/50

Abstract: Prior to entry into a low-power sleep mode, a radiotelephone (104) in a radiotelephone system (100) calculates in advance the timing required to wake up selected portions of the radiotelephone and stores the calculated wakeup times in registers (216). Also prior to entry into sleep mode, local timing of the radiotelephone is synchronized to received PN roll boundaries from the radiotelephone system. In the sleep mode, the radiotelephone uses a sleep timer (210) to simulate system timing. When the sleep timer (210) matches the stored wakeup times, the radiotelephone re-activates the selected portions of the radiotelephone, such as an oscillator (116) and a radio frequency portion (109) of an analog front end (108), to exit the sleep mode and reacquire communication with the system. This also permits an early exit from sleep mode, for example to service an interrupt, while maintaining system timing.

Abstract translation: 在进入低功率睡眠模式之前，无线电话系统（100）中的无线电话（104）预先计算唤醒无线电话机的所选部分所需的定时，并将所计算的唤醒时间存储在寄存器（216）中。 此外，在进入睡眠模式之前，无线电话机的本地定时被同步到从无线电话系统接收的PN卷边界。 在睡眠模式中，无线电话机使用睡眠定时器（210）来模拟系统定时。 当睡眠定时器（210）匹配所存储的唤醒时间时，无线电话机重新激活诸如模拟前端（108）的振荡器（116）和射频部分（109）的无线电话机的所选部分， 退出睡眠模式并重新获取与系统的通信。 这也允许早期退出睡眠模式，例如在维护系统时序的同时服务中断。

公开(公告)号：US5509015A

公开(公告)日：1996-04-16

申请号：US206701

申请日：1994-03-07

Applicant: Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Richard J. Kerr ,  Kenneth M. Geib

Inventor： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Richard J. Kerr ,  Kenneth M. Geib

IPC: H04J3/16 ,  H04B1/16 ,  H04B7/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04

CPC classification number: H04B1/1615 ,  H04W52/0216 ,  H04W52/0219 ,  H04B2201/70709 ,  H04W24/00 ,  H04W56/00 ,  H04W68/02 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/12 ,  H04W74/04 ,  Y02B60/50

Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

Abstract translation: 具有发射机和一个或多个接收机的通信系统中的接收机功率消耗的系统在“时隙”中调度周期性消息。 每个接收机被分配一个时隙，在该时隙中它监视传输。 发射机仅在分配的时隙期间向接收机发送消息。 接收机在其分配的时隙中处于“活动状态”。 如果消息要求接收方执行其他操作，则可能在其分配的时隙之后保持活动状态。 在“不活动状态”期间，其是其分配时隙的连续出现之间的时间段，接收机可以执行不需要与发射机协调的任何动作。 它可以在此期间通过从一个或多个组件（例如用于监视传输的组件）中的电力来节省电力。 在分配时隙之前的非活动状态期间，接收机对这些组件施加功率并执行初始化。 这样的初始化可以包括重新获取导频信道信号，如果接收机的定时信号在前一个非活动状态期间已经与发射机的定时信号漂移不同步，则其可以同步其自身。

公开(公告)号：US5392287A

公开(公告)日：1995-02-21

申请号：US847149

申请日：1992-03-05

Applicant: Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Richard J. Kerr ,  Kenneth M. Geib

Inventor： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Richard J. Kerr ,  Kenneth M. Geib

IPC: H04J3/16 ,  H04B1/16 ,  H04B7/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04 ,  H04J3/04

CPC classification number: H04B1/1615 ,  H04W52/0216 ,  H04W52/0219 ,  H04B2201/70709 ,  H04W24/00 ,  H04W56/00 ,  H04W68/02 ,  H04W72/04 ,  H04W72/0413 ,  H04W72/12 ,  H04W74/04 ,  Y02B60/50

Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include requiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

Abstract translation: 具有发射机和一个或多个接收机的通信系统中的接收机功率消耗的系统在“时隙”中调度周期性消息。 每个接收机被分配一个时隙，在该时隙中它监视传输。 发射机仅在分配的时隙期间向接收机发送消息。 接收机在其分配的时隙中处于“活动状态”。 如果消息要求接收方执行其他操作，则可能在其分配的时隙之后保持活动状态。 在“不活动状态”期间，其是其分配时隙的连续出现之间的时间段，接收机可以执行不需要与发射机协调的任何动作。 它可以在此期间通过从一个或多个组件（例如用于监视传输的组件）中的电力来节省电力。 在分配时隙之前的非活动状态期间，接收机对这些组件施加功率并执行初始化。 这样的初始化可以包括要求导频信道信号，如果接收机的定时信号在先前的非活动状态期间已经偏移与发射机的定时信号不同步，则其可以同步其自身。

公开(公告)号：US09185671B2

公开(公告)日：2015-11-10

申请号：US11759610

申请日：2007-06-07

Applicant: Ganesh Pattabiraman ,  John M. Burke

Inventor： Ganesh Pattabiraman ,  John M. Burke

IPC: H04B7/00 ,  H04W56/00 ,  G06F1/32 ,  H04B1/707 ,  H04B1/713 ,  H04W52/02 ,  H04W84/18 ,  H04W88/06

CPC classification number: H04W56/0015 ,  G06F1/3203 ,  H04B1/707 ,  H04B1/713 ,  H04B2201/70709 ,  H04W52/0216 ,  H04W52/0229 ,  H04W56/00 ,  H04W84/18 ,  H04W88/06 ,  Y02D10/126 ,  Y02D70/1224 ,  Y02D70/144 ,  Y02D70/40

Abstract: Techniques are provided for synchronizing a wakeup schedule for a first module and a wakeup schedule for a CDMA module in a wireless mobile unit operable in a synchronous communication system. In one embodiment, a next CDMA wakeup time is determined. A new wakeup time for the first module can then be synchronized to a next CDMA wakeup time when a next CDMA wakeup time is earlier than a next wakeup time for the first module

Abstract translation: 提供了用于同步用于第一模块的唤醒调度和用于在同步通信系统中操作的无线移动单元中的CDMA模块的唤醒调度的技术。 在一个实施例中，确定下一个CDMA唤醒时间。 然后，当下一个CDMA唤醒时间早于第一模块的下一个唤醒时间时，第一模块的新的唤醒时间可以被同步到下一个CDMA唤醒时间

公开(公告)号：US20140017993A1

公开(公告)日：2014-01-16

申请号：US14035032

申请日：2013-09-24

Applicant: Global Locate, Inc.

Inventor： Charles ABRAHAM

IPC: H04B7/185

CPC classification number: H04B7/1851 ,  G01S19/21 ,  H04B1/3805 ,  H04B2201/70709 ,  H04B2201/709709

Abstract: A method and apparatus for mitigating interference in a satellite signal receiver is described. The satellite signal receiver receives satellite signals from a plurality of satellites. In one example a control signal is transmitted to the satellite signal receiver upon occurrence of data transmission from a wireless transceiver operating in proximity to the satellite signal receiver. Signal integration within the satellite signal receiver is gated in response to the control signal In another example, one or more values of satellite signal samples are selected from a plurality of possible values. Signal integration within the satellite signal receiver is gated in response to a percentage of satellite signal samples taken over a predefined period exceeding a predefined threshold. In yet another example, a gain setting of an automatic gain control circuit within the satellite signal receiver is adjusted in response to detection of interference.

Abstract translation: 描述了用于减轻卫星信号接收机中的干扰的方法和装置。 卫星信号接收机从多个卫星接收卫星信号。 在一个示例中，当从邻近卫星信号接收机工作的无线收发器发生数据传输时，控制信号被发送到卫星信号接收机。 卫星信号接收机中的信号积分响应于控制信号选通。在另一示例中，从多个可能值中选择一个或多个卫星信号样本值。 卫星信号接收机内的信号积分响应于在超过预定义阈值的预定义周期内拍摄的卫星信号样本的百分比来选通。 在另一示例中，响应于干扰的检测来调整卫星信号接收机内的自动增益控制电路的增益设置。

公开(公告)号：US08086257B2

公开(公告)日：2011-12-27

申请号：US11201364

申请日：2005-08-11

Applicant: Rainer Bachl ,  Francis Dominique ,  Hongwei Kong ,  Walid E. Nabhane

Inventor： Rainer Bachl ,  Francis Dominique ,  Hongwei Kong ,  Walid E. Nabhane

IPC: H04B7/00

CPC classification number: H04L1/0054 ,  H04B2201/70709 ,  H04L1/0072

Abstract: In a method of detecting a signal, a control channel associated with a physical channel may be decoded to produce at least one decoding metric. A control channel signal on the control channel may then be detected based on the decoding metric.

Abstract translation: 在检测信号的方法中，可以对与物理信道相关联的控制信道进行解码以产生至少一个解码度量。 然后可以基于解码度量来检测控制信道上的控制信道信号。

公开(公告)号：US07724846B2

公开(公告)日：2010-05-25

申请号：US10455234

申请日：2003-06-05

Applicant: Charles Abraham

Inventor： Charles Abraham

IPC: H04B1/10

CPC classification number: H04B7/1851 ,  G01S19/21 ,  H04B1/3805 ,  H04B2201/70709 ,  H04B2201/709709

Abstract: A method and apparatus for mitigating interference in a satellite signal receiver is described. The satellite signal receiver receives satellite signals from a plurality of satellites. In one example, data transmission of a wireless transceiver operating in proximity to the satellite signal receiver is monitored. A control signal is transmitted to the satellite signal receiver upon occurrence of data transmission from the wireless transceiver. Signal integration within the satellite signal receiver is then gated is response to the control signal. In another example, one or more values of satellite signal samples are selected from a plurality of possible values. A percentage of satellite signal samples having the one or more selected values is monitored over a predefined period. Signal integration within the satellite signal receiver is gated in response to the percentage exceeding a predefined threshold. In yet another example, a gain setting of an automatic gain control circuit within the satellite signal receiver is adjusted in response to detection of interference.

Abstract translation: 描述了用于减轻卫星信号接收机中的干扰的方法和装置。 卫星信号接收机从多个卫星接收卫星信号。 在一个示例中，监视在卫星信号接收机附近操作的无线收发器的数据传输。 当从无线收发器发送数据传输时，控制信号被发送到卫星信号接收机。 然后，卫星信号接收机内的信号积分是对控制信号的响应。 在另一示例中，从多个可能值中选择卫星信号样本的一个或多个值。 在预定义的时间段内监视具有一个或多个所选值的卫星信号样本的百分比。 响应于超过预定阈值的百分比来选通卫星信号接收机内的信号整合。 在另一示例中，响应于干扰的检测来调整卫星信号接收机内的自动增益控制电路的增益设置。