公开(公告)号：US20090295632A1

公开(公告)日：2009-12-03

申请号：US12130520

申请日：2008-05-30

Applicant: Emilija M. Simic ,  Douglas Grover ,  Rizwan Ahmed

Inventor： Emilija M. Simic ,  Douglas Grover ,  Rizwan Ahmed

IPC: G01S1/00

CPC classification number: G01S19/21 ,  G01S19/22 ,  G01S19/30

Abstract: Methods and apparatus are provided for use in devices adapted to receive signals from at least one satellite positioning system (SPS). As part of at least one search for a transmission from a space vehicle (SV) associated with the SPS, the methods and apparatuses may correlate a code associated with the SV with a received signal to establish a plurality of correlation values, sample at least a portion of the correlation values during the search, and selectively transitioning the search early or prematurely based, at least in part, on at least one of the sampled correlation values.

Abstract translation: 提供了用于适于从至少一个卫星定位系统（SPS）接收信号的设备中使用的方法和装置。 作为至少一次搜索与SPS相关联的空间飞行器（SV）的传输的一部分，方法和装置可以将与SV相关联的代码与接收的信号相关联，以建立多个相关值，至少采样 在搜索期间相关值的一部分，以及至少部分地基于采样的相关值中的至少一个来选择性地早期或过早地选择性地转换搜索。

公开(公告)号：US08081922B2

公开(公告)日：2011-12-20

申请号：US12130520

申请日：2008-05-30

Applicant: Emilija M. Simic ,  Douglas Grover ,  Rizwan Ahmed

Inventor： Emilija M. Simic ,  Douglas Grover ,  Rizwan Ahmed

IPC: H04H1/00

CPC classification number: G01S19/21 ,  G01S19/22 ,  G01S19/30

Abstract: Methods and apparatus are provided for use in devices adapted to receive signals from at least one satellite positioning system (SPS). As part of at least one search for a transmission from a space vehicle (SV) associated with the SPS, the methods and apparatuses may correlate a code associated with the SV with a received signal to establish a plurality of correlation values, sample at least a portion of the correlation values during the search, and selectively transitioning the search early or prematurely based, at least in part, on at least one of the sampled correlation values.

Abstract translation: 提供了用于适于从至少一个卫星定位系统（SPS）接收信号的设备中使用的方法和装置。 作为至少一次搜索与SPS相关联的空间飞行器（SV）的传输的一部分，方法和装置可以将与SV相关联的代码与接收的信号相关联，以建立多个相关值，至少采样 在搜索期间相关值的一部分，以及至少部分地基于采样的相关值中的至少一个来选择性地早期地或过早地选择性地转换搜索。

公开(公告)号：US08442095B2

公开(公告)日：2013-05-14

申请号：US12139458

申请日：2008-06-14

Applicant: Rizwan Ahmed ,  Emilija M. Simic

Inventor： Rizwan Ahmed ,  Emilija M. Simic

IPC: H04B1/69

CPC classification number: H04B1/7077 ,  G01S19/30 ,  H04B1/709 ,  H04B2201/70715

Abstract: Methods and apparatus for code phase processing in a wireless communication device are described herein. A wireless device performs code phase search on a pseudo random code spread signal received over a wireless channel. A correlator correlates the received signal to a plurality of code phases in each of a plurality of frequency hypothesis. A maximum peak and a second peak are determined from the correlation results. Cross correlation processing is performed on the maximum peak and the maximum peak is discarded in favor of the second peak for position processing based on the results of the cross correlation.

Abstract translation: 本文描述了无线通信设备中用于码相位处理的方法和装置。 无线设备对通过无线信道接收的伪随机码扩展信号执行码相搜索。 相关器将接收的信号与多个频率假设中的每一个中的多个码相关联。 根据相关结果确定最大峰值和第二峰值。 基于互相关的结果，对最大峰进行互相关处理，并舍弃最大峰，有利于位置处理的第二峰。

公开(公告)号：US20090295631A1

公开(公告)日：2009-12-03

申请号：US12129397

申请日：2008-05-29

Applicant: Jie Wu ,  Rizwan Ahmed ,  Emilija M. Simic ,  Dominic Gerard Farmer

Inventor： Jie Wu ,  Rizwan Ahmed ,  Emilija M. Simic ,  Dominic Gerard Farmer

IPC: G01S1/00

CPC classification number: G01S19/21

Abstract: An apparatus and method for cross-correlation spur mitigation comprising choosing from a plurality of peak measurements, a first peak measurement with a first carrier-to-noise density estimate and a first Doppler offset measurement, and a second peak measurement with a second carrier-to-noise density estimate and a second Doppler offset measurement to form a pair; calculating a carrier-to-noise density difference based on the first carrier-to-noise density estimate and the second carrier-to-noise density estimate; calculating a Doppler difference based on the first Doppler offset measurement and the second Doppler offset measurement; comparing the carrier-to-noise density difference to a carrier-to-noise density threshold; and comparing the Doppler difference to at least one Doppler threshold.

Abstract translation: 一种用于互相关刺激减轻的装置和方法，包括从多个峰值测量中选择具有第一载波噪声密度估计和第一多普勒偏移测量的第一峰值测量，以及使用第二载波 - 噪声密度估计和第二多普勒偏移测量以形成一对; 基于所述第一载波噪声密度估计和所述第二载波噪声密度估计来计算载波噪声密度差; 基于第一多普勒偏移测量和第二多普勒偏移测量来计算多普勒差; 将载波噪声密度差与载波噪声密度阈值相比较; 以及将多普勒差异与至少一个多普勒阈值进行比较。

公开(公告)号：US08022869B2

公开(公告)日：2011-09-20

申请号：US12129397

申请日：2008-05-29

Applicant: Jie Wu ,  Rizwan Ahmed ,  Emilija M. Simic ,  Dominic Gerard Farmer

Inventor： Jie Wu ,  Rizwan Ahmed ,  Emilija M. Simic ,  Dominic Gerard Farmer

IPC: G01S19/24 ,  G01S19/37

CPC classification number: G01S19/21

Abstract: An apparatus and method for cross-correlation spur mitigation comprising choosing from a plurality of peak measurements, a first peak measurement with a first carrier-to-noise density estimate and a first Doppler offset measurement, and a second peak measurement with a second carrier-to-noise density estimate and a second Doppler offset measurement to form a pair; calculating a carrier-to-noise density difference based on the first carrier-to-noise density estimate and the second carrier-to-noise density estimate; calculating a Doppler difference based on the first Doppler offset measurement and the second Doppler offset measurement; comparing the carrier-to-noise density difference to a carrier-to-noise density threshold; and comparing the Doppler difference to at least one Doppler threshold.

Abstract translation: 一种用于互相关刺激减轻的装置和方法，包括从多个峰值测量中选择具有第一载波噪声密度估计和第一多普勒偏移测量的第一峰值测量，以及使用第二载波 - 噪声密度估计和第二多普勒偏移测量以形成一对; 基于所述第一载波噪声密度估计和所述第二载波噪声密度估计来计算载波噪声密度差; 基于第一多普勒偏移测量和第二多普勒偏移测量来计算多普勒差; 将载波噪声密度差与载波噪声密度阈值进行比较; 以及将多普勒差异与至少一个多普勒阈值进行比较。

公开(公告)号：US20090310654A1

公开(公告)日：2009-12-17

申请号：US12139458

申请日：2008-06-14

Applicant: Rizwan Ahmed ,  Emilija M. Simic

Inventor： Rizwan Ahmed ,  Emilija M. Simic

IPC: H04B1/707

CPC classification number: H04B1/7077 ,  G01S19/30 ,  H04B1/709 ,  H04B2201/70715

Abstract: Methods and apparatus for code phase processing in a wireless communication device are described herein. A wireless device performs code phase search on a pseudo random code spread signal received over a wireless channel. A correlator correlates the received signal to a plurality of code phases in each of a plurality of frequency hypothesis. A maximum peak and a second peak are determined from the correlation results. Cross correlation processing is performed on the maximum peak and the maximum peak is discarded in favor of the second peak for position processing based on the results of the cross correlation.

Abstract translation: 本文描述了无线通信设备中用于码相位处理的方法和装置。 无线设备对通过无线信道接收的伪随机码扩展信号执行码相搜索。 相关器将接收的信号与多个频率假设中的每一个中的多个码相关联。 根据相关结果确定最大峰值和第二峰值。 基于互相关的结果，对最大峰进行互相关处理，并舍弃最大峰，有利于位置处理的第二峰。

公开(公告)号：US20140055218A1

公开(公告)日：2014-02-27

申请号：US13594640

申请日：2012-08-24

Applicant: Curtiss Roberts ,  Rizwan Ahmed ,  Lillian Lent

Inventor： Curtiss Roberts ,  Rizwan Ahmed ,  Lillian Lent

IPC: H03J5/00

CPC classification number: H04B3/18 ,  H04B3/14

Abstract: A tunable wideband distribution circuit for transmitting a wireless signal over a transmission line is disclosed. The tunable wideband distribution circuit may include a programmable gain buffer, wherein the gain of the programmable gain buffer is based at least in part on a frequency of the wireless signal. The tunable wideband distribution circuit may also include a tuning element configured to modify an effective impedance of the transmission line based at least on the frequency of the wireless signal, wherein the tuning element is electrically coupled to the transmission line.

Abstract translation: 公开了一种用于通过传输线传输无线信号的可调宽带分配电路。 可调宽带分配电路可以包括可编程增益缓冲器，其中可编程增益缓冲器的增益至少部分地基于无线信号的频率。 可调谐宽带分配电路还可以包括调谐元件，其被配置为至少基于无线信号的频率来修改传输线的有效阻抗，其中调谐元件电耦合到传输线。

公开(公告)号：US20130212317A1

公开(公告)日：2013-08-15

申请号：US13371980

申请日：2012-02-13

Applicant: Shai Traister ,  Rizwan Ahmed

Inventor： Shai Traister ,  Rizwan Ahmed

IPC: G06F12/08 ,  G06F12/00

CPC classification number: G06F12/0871 ,  G06F1/3234 ,  G06F9/4418 ,  Y02D50/20

Abstract: Storage and host devices are provided for overlapping storage areas for a hibernation file and cached data. In one embodiment, a storage device is provided that receives a command from a host device to evict cached data in a first address range of the memory. The storage device then receives a command from the host device to store a hibernation file in a second address range of the memory, wherein the second address range does not exist in the memory. The storage device maps the second address range to the first address range and stores the hibernation file in the first address range. In another embodiment, a host device is provided that sends a command to a first storage device to evict cached data in a first address range of the first storage device's memory. The host device then sends a command to the first storage device to store a hibernation file in the first address range.

Abstract translation: 为休眠文件和缓存数据的重叠存储区域提供存储和主机设备。 在一个实施例中，提供了存储设备，其接收来自主机设备的命令，以驱出存储器的第一地址范围中的高速缓存的数据。 然后，存储设备从主机设备接收命令以将休眠文件存储在存储器的第二地址范围内，其中第二地址范围不存在于存储器中。 存储设备将第二地址范围映射到第一地址范围，并将休眠文件存储在第一地址范围内。 在另一个实施例中，提供了一种主机设备，其向第一存储设备发送命令以驱逐第一存储设备的存储器的第一地址范围中的缓存数据。 然后，主机设备向第一存储设备发送命令以将休眠文件存储在第一地址范围内。

公开(公告)号：US20120257701A1

公开(公告)日：2012-10-11

申请号：US13080196

申请日：2011-04-05

Applicant: Rizwan Ahmed

Inventor： Rizwan Ahmed

IPC: H03D3/24 ,  H03L7/08

CPC classification number: H03J1/005 ,  H03L7/0891 ,  H03L7/104

Abstract: In accordance with an embodiment of the present disclosure a phase-locked loop comprises a voltage controlled oscillator (VCO) configured to generate an output signal based on an input reference signal. The phase-locked loop further comprises a first charge pump communicatively coupled to a control input of the VCO and configured to generate, for a duration of time following occurrence of an event, a first control signal. The first control signal is independent of the output signal and is for causing the output signal to have a first frequency based on a second frequency of the input reference signal. The phase-locked loop further comprises a second charge pump communicatively coupled to the control input of the VCO. The second charge pump is configured to generate, after the duration of time, a second control signal. The second control signal is adjusted to lock the output signal with the input reference signal according to a phase difference between the output signal and the input reference signal such that the output signal is synchronized with the input reference signal.

Abstract translation: 根据本公开的实施例，锁相环包括被配置为基于输入参考信号产生输出信号的压控振荡器（VCO）。 锁相环还包括通信地耦合到VCO的控制输入的第一电荷泵，并且被配置为在发生事件之后的持续时间内产生第一控制信号。 第一控制信号与输出信号无关，并且用于使得输出信号基于输入参考信号的第二频率具有第一频率。 锁相环还包括通信地耦合到VCO的控制输入的第二电荷泵。 第二电荷泵配置成在持续时间之后产生第二控制信号。 第二控制信号被调整以根据输出信号和输入参考信号之间的相位差将输入信号与输入参考信号进行锁定，使得输出信号与输入参考信号同步。

公开(公告)号：US20110273332A1

公开(公告)日：2011-11-10

申请号：US13185246

申请日：2011-07-18

Applicant: Rizwan Ahmed ,  Rayman Wai Pon ,  Paul A. Conflitti

Inventor： Rizwan Ahmed ,  Rayman Wai Pon ,  Paul A. Conflitti

IPC: G01S19/32

CPC classification number: G01S19/246 ,  G01S19/30 ,  G01S19/32 ,  G01S19/33

Abstract: The subject matter disclosed herein relates to a system and method for processing multiple navigation signal components received from multiple global navigation satellite systems (GNSS'). In a particular implementation, a code phase in a first navigation signal component may be detected based, at least in part, on information in a second navigation signal component.

Abstract translation: 本文公开的主题涉及用于处理从多个全球导航卫星系统（GNSS））接收的多个导航信号分量的系统和方法。 在特定实现中，可以至少部分地基于第二导航信号分量中的信息来检测第一导航信号分量中的码相位。