Method and system for multi-function satellite positioning system receivers
    82.
    发明授权
    Method and system for multi-function satellite positioning system receivers 有权
    多功能卫星定位系统接收机的方法和系统

    公开(公告)号:US07151489B2

    公开(公告)日:2006-12-19

    申请号:US10717210

    申请日:2003-11-19

    申请人: Ashutosh Pande

    发明人: Ashutosh Pande

    IPC分类号: G01S1/00

    摘要: Multifunction satellite positioning receiver having a plurality of functions that are selectable in response to predetermined events or in response to user actions and enable more efficient use of the hardware and processing resources of a multifunction satellite position receiver.

    摘要翻译: 多功能卫星定位接收机具有响应于预定事件或响应于用户动作而可选择的多个功能,并且能够更有效地使用硬件并处理多功能卫星定位接收机的资源。

    Generic satellite positioning system receivers with programmable inputs

    公开(公告)号:US07132978B2

    公开(公告)日:2006-11-07

    申请号:US10815410

    申请日:2004-04-01

    IPC分类号: H04B7/185

    摘要: Generic SATPS receivers and methods for configuring generic SATPS receivers that include a plurality of outputs are provided. These configurable SATPS receivers are adapted to be utilized in at least one of a plurality of particular SATPS receiver applications, and can also include a plurality of input paths, and a means for generating selected ones of the plurality of possible outputs. Selected ones of the plurality of outputs are enabled/disabled based on at least one requirement of the particular receiver application to configure or program the generic SATPS receiver to function as a SATPS receiver used for a particular SATPS receiver application or operating environment. The selected ones of the plurality of outputs can be defined by and can be those utilized by the particular SATPS receiver application or operating environment. Thus, SATPS receivers are provided that can be used in multiple applications, that can accept multiple types of assistance data, and that have multiple types of outputs depending on the application and/or desires of the user. The SATPS receiver can be implemented in SATPS systems that include at least one satellite that provides SATPS information, a generic SATPS receiver, and a remote computer.

    Strong signal cancellation to enhance processing of weak spread spectrum signal
    84.
    发明授权
    Strong signal cancellation to enhance processing of weak spread spectrum signal 有权
    强信号消除增强弱扩频信号的处理

    公开(公告)号:US07116704B2

    公开(公告)日:2006-10-03

    申请号:US10706167

    申请日:2003-11-12

    IPC分类号: H04B1/707

    摘要: A CDMA coded, spread spectrum radio signal containing a strong signal and a weak signal is received, and the interference of the strong signal with the weak signal is computed to enhance the ability to track the weak signal. The codes modulating both signals are known, and the weak signal can be predicted. The interference of the strong signal is calculated as the product of the amplitude of the strong signal and the predicted crosscorrelation of the strong signal with the weak signal. The strong signal may be measured, predicted, or acquired through a combination of both methods. The crosscorrelation may be predicted for a range of weak signal values, and the weak signal selected as the prediction producing the greatest received power.

    摘要翻译: 接收包含强信号和弱信号的CDMA编码的扩频无线电信号,并计算强信号与弱信号的干扰,以增强跟踪弱信号的能力。 调制两个信号的码是已知的,并且可以预测弱信号。 强信号的干扰被计算为强信号的幅度与强信号与弱信号的预测交叉相关的乘积。 可以通过两种方法的组合来测量,预测或获取强信号。 可以针对弱信号值的范围预测互相关,并且选择作为产生最大接收功率的预测的弱信号。

    Memory reallocation and sharing in electronic systems
    86.
    发明授权
    Memory reallocation and sharing in electronic systems 有权
    电子系统中的内存重新分配和共享

    公开(公告)号:US07047368B2

    公开(公告)日:2006-05-16

    申请号:US10696522

    申请日:2003-10-28

    IPC分类号: G06F12/00

    摘要: Memory reallocation and sharing among components of an electronic system is provided. The electronic system includes a first memory area coupled for access by a first processor via a first bus, and a second memory area coupled for access by a second processor via a second bus. An example system includes a central processor as the first processor and a digital signal processor as the second processor. The electronic system further includes memory configurations that support shared access of the second memory area by the first processor. Using shared access, the first processor can directly access the second memory via the first bus or indirectly access the second memory via the second bus and the second processor. The memory sharing also includes partitioning the shared memory to simultaneously provide the first processor with direct and indirect access to the shared memory.

    摘要翻译: 提供电子系统组件之间的内存重新分配和共享。 电子系统包括第一存储器区域,其被耦合用于经由第一总线由第一处理器访问,第二存储器区域被耦合以经由第二总线由第二处理器访问。 示例系统包括作为第一处理器的中央处理器和作为第二处理器的数字信号处理器。 电子系统还包括支持第一处理器对第二存储器区域的共享访问的存储器配置。 使用共享访问,第一处理器可以经由第一总线直接访问第二存储器,或通过第二总线和第二处理器间接访问第二存储器。 存储器共享还包括划分共享存储器以同时向第一处理器提供对共享存储器的直接和间接访问。

    Signal detector employing correlation analysis of non-uniform and disjoint sample segments
    87.
    发明授权
    Signal detector employing correlation analysis of non-uniform and disjoint sample segments 有权
    信号检测器采用非均匀和不相交样本段的相关分析

    公开(公告)号:US07002516B2

    公开(公告)日:2006-02-21

    申请号:US10644311

    申请日:2003-08-19

    IPC分类号: G01S3/16 H04Q7/22

    CPC分类号: G01S19/30 G01S19/29

    摘要: A wireless communication device (e.g., a cellular telephone) includes one transceiver for voice or data communication and a global positioning system (GPS) receiver a signal for receiving a GPS signal from the GPS satellites. The GPS receiver does not receive the GPS signal when the transceiver is transmitting, so that the GPS signal receives may consist of multiple signal segments of various duration and various delays. A method is provided which combine correlations of these multiple signal segments cumulatively until a sufficiently signal-to-noise ratio is achieved to allow detection of the transmitted signal of one or more of the GPS satellites.

    摘要翻译: 无线通信设备(例如,蜂窝电话)包括用于语音或数据通信的一个收发器和全球定位系统(GPS)接收机,用于从GPS卫星接收GPS信号的信号。 当收发器正在发送时,GPS接收机不接收GPS信号,使得GPS信号接收可以由不同持续时间和各种延迟的多个信号段组成。 提供了一种累积地组合这些多个信号段的相关性的方法,直到实现足够的信噪比以允许检测一个或多个GPS卫星的发射信号。

    Method and apparatus for reducing GPS receiver jamming during transmission in a wireless receiver
    88.
    发明授权
    Method and apparatus for reducing GPS receiver jamming during transmission in a wireless receiver 失效
    用于在无线接收机中传输期间减少GPS接收机干扰的方法和装置

    公开(公告)号:US06961019B1

    公开(公告)日:2005-11-01

    申请号:US09920898

    申请日:2001-08-02

    摘要: A method and apparatus for minimizing the interference between wireless transmissions and a proximately located or co-located GPS receiver is disclosed. By feedforward of a phase and amplitude adjusted version of the transmitted signal and combining said signal with the composite signal at the input of the GPS receiver, the GPS receiver sensitivity degradation is reduced or eliminated in the case of perfect cancellation, and the GPS receiver is not jammed by the wireless transmissions. The invention allows a single antenna to be implemented for GPS reception and wireless transmission and reception without unduly complicating the diplexing/filtering network required to separate the multiple signals being transmitted and/or received by the single antenna.

    摘要翻译: 公开了一种用于最小化无线传输与近端定位或共位GPS接收机之间的干扰的方法和装置。 通过前馈发送信号的相位和幅度调整版本,并将所述信号与GPS接收机输入端的复合信号相结合,在完全消除的情况下GPS接收机灵敏度降低或消除,GPS接收机 不被无线传输卡住。 本发明允许单个天线实现用于GPS接收和无线发送和接收,而不会使由单个天线发送和/或接收的多个信号分离所需的双工/滤波网络过度复杂化。

    Signal detector employing a doppler phase correction system
    89.
    发明授权
    Signal detector employing a doppler phase correction system 失效
    信号检测器采用多普勒相位校正系统

    公开(公告)号:US06931055B1

    公开(公告)日:2005-08-16

    申请号:US09551276

    申请日:2000-04-18

    IPC分类号: G01S1/00 H04B1/707

    CPC分类号: G01S19/29 G01S19/37 H04B1/707

    摘要: A spread spectrum detector employs a Doppler phase correction system that improves correlation of pseudo-noise (PN) codes to a received spread spectrum signal by combining phase shifts to correlation values, using a fast fourier transform (FFT), that compensate for the Doppler shift error that is inherent in the signal and that is imposed upon the signal by movement between the signal source and receiver. In architecture, the Doppler phase correction system includes a receiver to receive a spread spectrum modulated signal having the Doppler shift error. A multiplier produces a plurality of complex first correlation values based upon the signal and a code. A phase shifter generates a plurality of complex second correlation values respectively from the first correlation values using an FFT. The second correlation values are phase shifted by respective different amounts from corresponding first correlation values, so that the second correlation values exhibit less of the Doppler shift error than the first correlation values. A combiner, such as an integrator, combines, or integrates, the second correlation values to derive a third correlation value that indicates a degree of correspondence of the a code with the signal.

    摘要翻译: 扩展频谱检测器采用多普勒相位校正系统,其通过使用补偿多普勒频移的快速傅立叶变换(FFT)将相移组合到相关值来改善伪噪声(PN)码与接收的扩频信号的相关性 信号中固有的并且通过信号源和接收器之间的移动而施加在信号上的误差。 在架构中,多普勒相位校正系统包括用于接收具有多普勒频移误差的扩频调制信号的接收机。 乘法器基于信号和代码产生多个复数的第一相关值。 移相器使用FFT从第一相关值分别生成多个复数第二相关值。 第二相关值与相应的第一相关值相移相应的不同量,使得第二相关值表现出比第一相关值少的多普勒偏移误差。 诸如积分器的组合器组合或积分第二相关值以导出指示代码与信号的对应程度的第三相关值。

    Signal detector and method employing a coherent accumulation system to correlate non-uniform and disjoint sample segments
    90.
    发明授权
    Signal detector and method employing a coherent accumulation system to correlate non-uniform and disjoint sample segments 有权
    信号检测器和采用相干累加系统的方法来使不均匀和不相交的样本段相关联

    公开(公告)号:US06850557B1

    公开(公告)日:2005-02-01

    申请号:US09551047

    申请日:2000-04-18

    摘要: A signal detector employs a coherent accumulation system that coherently combines the correlation results derived from segments of samples of a received signal. The segments may have non-uniform lengths and may have been obtained over different and non-overlapping time periods. The segments are obtained during sampling windows of arbitrary length and at arbitrary times, and the results of processing the segments are successively combined in a coherent manner (separate magnitude and phase accumulation) until a threshold signal-to-noise ratio (SNR) has been achieved. Coherent integration is enabled by introducing a carrier phase offset as well as a code phase offset, so that different segments are aligned in carrier phase as well as code phase. Although not limited to this application, in one implementation example, the signal detector is used in connection with and as part of a global positioning system (GPS) receiver.

    摘要翻译: 信号检测器采用相干累加系统,其相干地组合从接收信号的采样段导出的相关结果。 这些段可以具有不均匀的长度,并且可以在不同的和非重叠的时间段上获得。 在任意长度和任意时间的采样窗口期间获得段,并且以相干方式(分开的幅度和相位累积)连续组合段的处理结果,直到阈值信噪比(SNR)已经被 实现了 通过引入载波相位偏移以及码相位偏移来实现相干积分,使得不同的段在载波相位以及码相位中对准。 尽管不限于该应用,但是在一个实施例中,信号检测器与全球定位系统(GPS)接收机相关并且作为全球定位系统(GPS)接收机的一部分使用。