公开(公告)号：WO2004095718A2

公开(公告)日：2004-11-04

申请号：PCT/US2004/012217

申请日：2004-04-20

Applicant: MOTOROLA, INC., a corporation of the State of Delaware ,  BALLANTYNE, Wayne, W. ,  KING, Thomas, M.

Inventor： BALLANTYNE, Wayne, W. ,  KING, Thomas, M.

IPC: H04B

CPC classification number: H03J1/0083 ,  H03J1/0033 ,  H03J1/0041 ,  H03J3/185 ,  H03J2200/02 ,  H03J2200/11

Abstract: A multiple channel receiver (200) includes a communications receiver synthesizer (204) and at least one numerically controlled oscillator (NCO) (406) that produce local oscillator signals that are derived from a common reference oscillator (202). A DSP (212) and CPU (214) perform automatic frequency control (AFC) by adjustment of the reference oscillator (202) based upon a signal received by a receive channel using the local oscillator signal produced by the communications receiver synthesizer (204). The CPU (214) also provides a synchronous indication of adjustments to the reference oscillator (202) to control circuitry for the at least one NCO (406) so that the configuration of the NCO (406) can be altered so as to maintain a substantially constant frequency output during the adjustment of the reference oscillator (202).

Abstract translation: （200）包括通信接收器合成器（204）和至少一个数字控制振荡器（NCO）（406），所述数字控制振荡器（NCO）（406）产生本地振荡器信号，所述本地振荡器信号从公共参考振荡器 202）。 DSP（212）和CPU（214）通过使用由通信接收机合成器（204）产生的本地振荡器信号，基于由接收信道接收的信号调整基准振荡器（202）来执行自动频率控制（AFC）。 CPU（214）还提供对基准振荡器（202）对用于至少一个NCO（406）的控制电路的调整的同步指示，使得可以改变NCO（406）的配置以便基本上保持 在调整参考振荡器（202）期间恒定的频率输出。

公开(公告)号：WO2004065979A2

公开(公告)日：2004-08-05

申请号：PCT/US2004/000775

申请日：2004-01-13

Applicant: GLOBAL LOCATE, INC.

Inventor： ABRAHAM, Charles

IPC: G01S

CPC classification number: H04B1/403 ,  G01S19/235 ,  H03J7/04 ,  H03J2200/11 ,  H04B1/3805

Abstract: A method and apparatus for using a conventional oscillator in a cellular telephone transceiver as a source of a reference signal for a GPS receiver. In one embodiment, the method comprises using a voltage-controlled oscillator ("VCXO") within a cellular telephone transceiver to generate a reference frequency signal for the GPS receiver. Circuitry within the telephone transceiver generates a frequency error signal. Both of these signals are coupled to GPS circuitry and used to control a carrier numerically controlled oscillator ("NCO") and a code NCO. The NCOs produce a tuning signal and a timing signal, respectively. The GPS circuitry uses the NCO generated signals to process GPS signals.

Abstract translation: 用于在蜂窝电话收发器中使用常规振荡器作为GPS接收器的参考信号源的方法和设备。 在一个实施例中，该方法包括使用蜂窝电话收发机内的压控振荡器（“VCXO”）来为GPS接收机生成参考频率信号。 电话收发器内的电路产生频率误差信号。 这两个信号都耦合到GPS电路并用于控制载波数字控制振荡器（“NCO”）和代码NCO。 NCO分别产生调谐信号和定时信号。 GPS电路使用NCO产生的信号来处理GPS信号。

公开(公告)号：WO2004055543A1

公开(公告)日：2004-07-01

申请号：PCT/US2003/039495

申请日：2003-12-10

Applicant: QUALCOMM INCORPORATED

Inventor： KRASNER, Norman F.

IPC: G01S5/14

CPC classification number: G01S19/235 ,  H03J2200/11

Abstract: To provide accurate and quick position measurements in a practical mobile position location system, the GPS receiver is calibrated, a frequency error in the next time period is predicted using a first frequency locked to an externally transmitted signal, and a second frequency is generated by a GPS oscillator. To predict the error in the next time period, several measurements are made over time, error estimations are made, an error function is approximated responsive to the set of error estimations. This predicted error is then used to correct the GPS receiver in the next time period. In one implementation, a multiple function portable device is disclosed for providing cellular communication using a network of cellular stations that operate at predefined ideal cellular frequencies, and also for providing position location using GPS satellites that transmit GPS signals at a predefined GPS frequency.

Abstract translation: 为了在实际的移动位置定位系统中提供准确和快速的位置测量，GPS接收机被校准，使用锁定到外部发送信号的第一频率来预测下一时间段中的频率误差，并且第二频率由 GPS振荡器。 为了预测下一个时间段的误差，随着时间的推移进行了几次测量，进行了误差估计，对误差估计集进行误差函数近似。 然后，该预测误差用于在下一时间段内对GPS接收机进行校正。 在一个实现中，公开了一种多功能便携式设备，用于使用在预定义的理想蜂窝频率下操作的蜂窝站的网络来提供蜂窝通信，并且还用于使用以预定的GPS频率发送GPS信号的GPS卫星来提供位置定位。

公开(公告)号：WO2004095718A3

公开(公告)日：2004-12-29

申请号：PCT/US2004012217

申请日：2004-04-20

Applicant: MOTOROLA INC ,  BALLANTYNE WAYNE W ,  KING THOMAS M

Inventor： BALLANTYNE WAYNE W ,  KING THOMAS M

IPC: H03J1/00 ,  H03J3/18 ,  H04B1/06

CPC classification number: H03J1/0083 ,  H03J1/0033 ,  H03J1/0041 ,  H03J3/185 ,  H03J2200/02 ,  H03J2200/11

Abstract: A multiple channel receiver (200) includes a communications receiver synthesizer (204) and at least one numerically controlled oscillator (NCO) (406) that produce local oscillator signals that are derived from a common reference oscillator (202). A DSP (212) and CPU (214) perform automatic frequency control (AFC) by adjustment of the reference oscillator (202) based upon a signal received by a receive channel using the local oscillator signal produced by the communications receiver synthesizer (204). The CPU (214) also provides a synchronous indication of adjustments to the reference oscillator (202) to control circuitry for the at least one NCO (406) so that the configuration of the NCO (406) can be altered so as to maintain a substantially constant frequency output during the adjustment of the reference oscillator (202).

Abstract translation: 多通道接收器（200）包括通信接收机合成器（204）和产生从公共参考振荡器（202）导出的本地振荡器信号的至少一个数控振荡器（NCO）（406）。 DSP（212）和CPU（214）通过使用由通信接收机合成器（204）产生的本地振荡器信号由接收信道接收的信号来调整参考振荡器（202）来执行自动频率控制（AFC）。 CPU（214）还向参考振荡器（202）提供对于至少一个NCO（406）的控制电路的调整的同步指示，使得可以改变NCO（406）的配置，以便保持基本上 在调整参考振荡器（202）期间的恒定频率输出。

公开(公告)号：WO1997014057A1

公开(公告)日：1997-04-17

申请号：PCT/US1996016178

申请日：1996-10-08

Applicant: SNAPTRACK, INC.

Inventor： SNAPTRACK, INC. ,  KRASNER, Norman, F.

IPC: G01S05/14

CPC classification number: H04B1/3805 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/07 ,  G01S19/09 ,  G01S19/11 ,  G01S19/235 ,  G01S19/252 ,  G01S19/254 ,  G01S19/256 ,  G01S19/258 ,  G01S19/34 ,  G01S19/41 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/06 ,  H03J2200/11

Abstract: A global positioning system (GPS) receiver has first circuitry for receiving and processing pseudorandom sequences transmitted by a number of GPS satellites. The first circuitry is configured to perform conventional correlation operations on the received pseudorandom sequences to determine pseudoranges from the GPS receiver to the GPS satellites. The GPS receiver also includes second circuitry coupled to the first circuitry. The second circuitry is configured to receive and process the pseudorandom sequences during blockage conditions. The second circuitry processes the pseudorandom sequences by digitizing and storing a predetermined record length of the received sequences and then performing fast convolution operations on the stored data to determine the pseudoranges. The GPS receiver may have a common circuitry for receiving GPS signals from in view satellites and downconverting the RF frequency of the received GPS signals to an intermediate frequency (IF). The IF signals are split into two signal paths, a first of which provides the conventional correlation processing to calculate the pseudoranges. During blockage conditions, the IF signal is passed to the second signal path wherein the IF signals are digitized and stored in memory and later processed using the fast convolution operations to provide the pseudoranges. Alternative arrangements for the two signal paths include separate downconverters or shared digitizers. One embodiment provides both signal paths on a single integrated circuit with shared circuitry executing computer-readable instructions to perform GPS signal processing appropriate to the reception conditions.

Abstract translation: 全球定位系统（GPS）接收机具有用于接收和处理由多个GPS卫星发送的伪随机序列的第一电路。 第一电路被配置为对所接收的伪随机序列执行传统的相关操作，以确定从GPS接收机到GPS卫星的伪距离。 GPS接收机还包括耦合到第一电路的第二电路。 第二电路被配置为在阻塞状态期间接收和处理伪随机序列。 第二电路通过数字化并存储接收到的序列的预定记录长度然后对所存储的数据执行快速卷积运算来确定伪距来处理伪随机序列。 GPS接收机可以具有用于从视频卫星接收GPS信号并将接收的GPS信号的RF频率下变频到中频（IF）的公共电路。 IF信号被分成两个信号路径，第一个信号路径提供常规的相关处理来计算伪距离。 在阻塞条件期间，IF信号被传递到第二信号路径，其中IF信号被数字化并存储在存储器中，并且随后使用快速卷积运算来处理以提供伪距。 两个信号路径的替代布置包括单独的下变频器或共享数字化仪。 一个实施例在单个集成电路上提供两个信号路径，共享电路执行计算机可读指令以执行适合于接收条件的GPS信号处理。

公开(公告)号：WO1997014055A1

公开(公告)日：1997-04-17

申请号：PCT/US1996016160

申请日：1996-10-08

Applicant: SNAPTRACK, INC.

Inventor： SNAPTRACK, INC. ,  KRASNER, Norman, F.

IPC: G01S05/14

CPC classification number: G01S19/235 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0045 ,  G01S5/009 ,  G01S19/07 ,  G01S19/09 ,  G01S19/11 ,  G01S19/252 ,  G01S19/254 ,  G01S19/256 ,  G01S19/258 ,  G01S19/34 ,  G01S19/37 ,  G01S19/41 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/06 ,  H03J2200/11 ,  H04B1/3805 ,  H04B2001/3894

Abstract: A positioning sensor receives and stores a predetermined record length of positioning signals while in a fix position located such that the positioning sensor can receive positioning signals. Thereafter, the stored positioning signals are processed to determine the geographic location of the fix position. The fix position may correspond to a location of an object of interest or it may be in a known location relative to the position of the object, in which case once the geographic location of the fix position has been computed, the geographic location of the object can be derived. The positioning sensor includes a Snapshot GPS receiver which may collect and process GPS signals transmitted by GPS satellites using fast convolution operations to compute pseudoranges from the GPS satellites to the fix position. Alternatively, these computations may be performed at a basestation. The computed pseudoranges may then be used to determine the geographic location of the fix position. The positioning sensor may be equipped with depth sensing means, such as a pressure sensor, which allows a determination of the depth of submerged object to be made. The positioning sensor may further be equipped with signal detecting means for determining when the positioning sensor is in the fix position.

Abstract translation: 定位传感器接收并存储定位信号的预定记录长度，同时位于定位传感器可以接收定位信号的固定位置。 此后，处理存储的定位信号以确定固定位置的地理位置。 固定位置可以对应于感兴趣对象的位置，或者它可以在相对于对象的位置的已知位置中，在这种情况下，一旦已经计算了固定位置的地理位置，该对象的地理位置 可以派生。 定位传感器包括一个快照GPS接收器，它可以采集快速卷积运算来收集和处理由GPS卫星发射的GPS信号，以计算从GPS卫星到固定位置的伪距。 或者，这些计算可以在基站执行。 然后可以使用计算的伪距来确定固定位置的地理位置。 定位传感器可以配备有诸如压力传感器的深度感测装置，其允许确定要被制造的浸没物体的深度。 定位传感器还可以配备有用于确定定位传感器何时处于固定位置的信号检测装置。

公开(公告)号：WO9714049A2

公开(公告)日：1997-04-17

申请号：PCT/US9616161

申请日：1996-10-08

Applicant: SNAPTRACK INC

Inventor： KRASNER NORMAN F

IPC: G01S1/00 ,  G01S5/00 ,  G01S19/05 ,  G01S19/09 ,  G01S19/11 ,  G01S19/23 ,  G01S19/25 ,  G01S19/29 ,  G01S19/34 ,  G01S19/37 ,  G06F1/00 ,  H01Q1/27 ,  H01Q21/28 ,  H03D7/16 ,  H03J7/04 ,  H03J7/06 ,  H04B1/00 ,  H04B1/28 ,  H04B1/38 ,  H04B7/26 ,  H04Q7/34 ,  G01S1/04 ,  G01S1/02 ,  G01S5/14

CPC classification number: H04B1/0007 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/05 ,  G01S19/09 ,  G01S19/254 ,  G01S19/34 ,  G01S2205/008 ,  G06F2221/2111 ,  H01Q1/273 ,  H01Q21/28 ,  H03D7/163 ,  H03J7/04 ,  H03J7/06 ,  H03J2200/11 ,  H04B1/00 ,  H04B1/28 ,  H04B1/3805 ,  H04B2001/3894

Abstract: A GPS receiver in one embodiment includes an antenna which receives GPS signals at an RF frequency from in view satellites; a downconverter coupled to the antenna for reducing the RF frequency of the received GPS signals to an intermediate frequency (IF); a digitizer coupled to the downconverter and sampling the IF GPS signals at a predetermined rate to produce sampled IF GPS signals; a memory coupled to the digitizer storing the sampled IF GPS signals (a snapshot of GPS signals); and a digital signal processor (DSP) coupled to the memory and operating under stored instructions thereby performing Fast Fourier Transform (FFT) operations on the sampled IF GPS signals to provide pseudorange information. These operations typically also include preprocessing and postprocessing of the GPS signals. After a snapshot of data is taken, the receiver front end is powered down. The GPS receiver in one embodiment also includes other power management features and includes, in another embodiment the capability to correct for errors in its local oscillator which is used to sample the GPS signals. The calculation speed of pseudoranges, and sensitivity of operation, is enhanced by the transmission of the Doppler frequency shifts of in view satellites to the receiver from an external source, such as a basestation in one embodiment of the invention.

Abstract translation: 一个实施例中的GPS接收机包括从视频卫星以RF频率接收GPS信号的天线; 耦合到天线的下变频器，用于将接收到的GPS信号的RF频率降低到中频（IF）; 耦合到下变频器并以预定速率对IF GPS信号进行采样以产生采样的IF GPS信号的数字转换器; 耦合到数字转换器的存储器存储采样的IF GPS信号（GPS信号的快照）的存储器; 以及数字信号处理器（DSP），其耦合到存储器并且在存储的指令下操作，从而对采样的IF GPS信号执行快速傅里叶变换（FFT）操作以提供伪距信息。 这些操作通常还包括GPS信号的预处理和后处理。 拍摄数据快照后，接收机前端将关闭电源。 在一个实施例中，GPS接收机还包括其他功率管理特征，并且在另一个实施例中包括校正用于对GPS信号进行采样的本地振荡器中的错误的能力。 通过在本发明的一个实施例中的诸如基站之类的外部源将观测卫星的多普勒频移传输到接收机，增强了伪距的计算速度和操作灵敏度。

公开(公告)号：WO2005026766A3

公开(公告)日：2005-05-06

申请号：PCT/US2004026222

申请日：2004-08-14

Applicant: SIRF TECH INC ,  UNDERBRINK PAUL A

Inventor： UNDERBRINK PAUL A

IPC: G01S20060101 ,  G01S1/00 ,  G01S19/23 ,  G01S19/25 ,  G01S19/44 ,  G01S19/46 ,  H03J1/00 ,  H03L7/081 ,  H03L7/197 ,  H04B1/26 ,  H04B1/38 ,  H04B1/40 ,  H04B7/26 ,  H04J13/00 ,  H04Q7/20

CPC classification number: H04B1/3805 ,  G01S19/235 ,  H03J1/005 ,  H03J2200/09 ,  H03J2200/11 ,  H03L7/081 ,  H03L7/1976 ,  H04B1/403

Abstract: A mobile communications device (40) using a common oscillator for communication and global positioning system (GPS) functions. In one embodiment, a communications unit (408) receives a precision carrier frequency signal from a source (407) and generates a reference signal (401) that is used to calibrate a common oscillator.

Abstract translation: 一种使用公共振荡器进行通信和全球定位系统（GPS）功能的移动通信设备（40）。 在一个实施例中，通信单元（408）从源（407）接收精确载波频率信号并且生成用于校准公共振荡器的参考信号（401）。

公开(公告)号：WO2003098817A2

公开(公告)日：2003-11-27

申请号：PCT/US2003/015562

申请日：2003-05-15

Applicant: MOTOROLA, INC., A CORPORATION OF THE STATE OF DELAWARE

Inventor： VOOR, Thomas, E. ,  TAWADROUS, Sameh, W. ,  DECK, Ronald, H.

IPC: H04B

CPC classification number: H03L7/23 ,  G01S19/235 ,  H03J7/065 ,  H03J2200/11 ,  H03L7/183 ,  H04B1/3805 ,  H04B1/403

Abstract: A frequency management scheme for a hybrid communications/positioning device, such as a cellular/GPS or other combined device, generates a local clock signal for the communications portion of the device, using a crystal oscillator or other part. The oscillator output may be delivered to a phase locked loop to drive a high-frequency clock for the cellular or other communications portion of the hybrid device. A processor may determine frequency error between the phase locked loop and base station or other reference, to derive a digital frequency tracking message. A Doppler search or other logical control message may likewise be communicated from the processor to a GPS or other positioning receiver. The GPS receiver circuitry may consequently adjust Doppler center, window width or other parameters to enhance time to first fix or other performance. The architecture eliminates the need for a second crystal or other direct oscillator in the GPS receiver portion of the hybrid device, while still maintaining GPS performance. The architecture of the design also eliminates the need for frequency correcting elements in the crystal oscillator or other base reference oscillator or clock. The invention can furthermore be used in any system, radio, modem, transceiver, or receiver that has two or more receivers that share one reference or base oscillator or clock.

Abstract translation: 用于诸如蜂窝/ GPS或其他组合设备的混合通信/定位设备的频率管理方案使用晶体振荡器或其他部分为设备的通信部分生成本地时钟信号。 振荡器输出可以被传送到锁相环以驱动用于混合设备的蜂窝或其他通信部分的高频时钟。 处理器可以确定锁相环和基站或其他参考之间的频率误差，以导出数字频率跟踪消息。 多普勒搜索或其他逻辑控制消息同样可以从处理器传送到GPS或其他定位接收器。 因此，GPS接收器电路可以调整多普勒中心，窗口宽度或其他参数，以增强第一次固定或其他性能的时间。 该架构消除了在混合设备的GPS接收机部分中的第二晶体或其他直接振荡器的需要，同时仍然保持GPS性能。 该设计的架构也消除了在晶体振荡器或其他基准参考振荡器或时钟中的频率校正元件的需要。 本发明还可以用于具有共享一个参考或基本振荡器或时钟的两个或多个接收器的任何系统，无线电，调制解调器，收发器或接收器。

公开(公告)号：WO2003073629A1

公开(公告)日：2003-09-04

申请号：PCT/US2003/005287

申请日：2003-02-20

Applicant: GLOBAL LOCATE, INC.

Inventor： ABRAHAM, Charles

IPC: H04B1/06

CPC classification number: H03B5/04 ,  G01S19/235 ,  H03J1/0008 ,  H03J3/04 ,  H03J2200/11 ,  H03L1/025 ,  H03L1/026 ,  H04B1/3805

Abstract: A method and apparatus for compensating an oscillator (108) in a location-enabled wireless device (102) is described. In an example, a mobile device (102) includes a wireless receiver (104) for receiving wireless signals (118) and a GPS receiver (112) for receiving GPS signals (120). The mobile device (102) also includes an oscillator (108) having an associated temperature model (110). A frequency error (126) is derived from a wireless signal. The temperature model (110) is adjusted in response to the frequency error (126) and a temperature proximate the oscillator (108). Frequency error of the oscillator (108) is compensated using the adjusted temperature model. In another example, a frequency error is derived using a second oscillator within the wireless receiver (104).

Abstract translation: 描述了用于补偿位置使能的无线设备（102）中的振荡器（108）的方法和装置。 在一个示例中，移动设备（102）包括用于接收无线信号的无线接收机（104）和用于接收GPS信号（120）的GPS接收机（112）。 移动设备（102）还包括具有相关温度模型（110）的振荡器（108）。 从无线信号导出频率误差（126）。 响应于频率误差（126）和靠近振荡器（108）的温度来调节温度模型（110）。 振荡器（108）的频率误差使用调整温度模型进行补偿。 在另一示例中，使用无线接收器（104）内的第二振荡器导出频率误差。