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    Apparatus for Reducing Auto-Correlation or Cross-Correlation in Weak CDMA Signals
    5.
    发明申请
    Apparatus for Reducing Auto-Correlation or Cross-Correlation in Weak CDMA Signals 审中-公开
    用于减少弱信号中的自相关或相关相关的装置

    公开(公告)号：US20070207803A1

    公开(公告)日：2007-09-06

    申请号：US11676501

    申请日：2007-02-19

    申请人： Gregory Turetzky ,  Charles Norman ,  Henry Falk

    发明人： Gregory Turetzky ,  Charles Norman ,  Henry Falk

    IPC分类号： H04Q7/20

    CPC分类号： G01S19/37 ,  G01S5/0027 ,  G01S5/0036 ,  G01S19/09 ,  G01S19/21 ,  G01S19/25 ,  G01S19/26 ,  G01S19/30 ,  H04B1/7075 ,  H04B1/70755 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/7097 ,  H04B2201/70715

    摘要： The present invention discloses methods, apparatuses, and systems for eliminating auto- and cross-correlation in weak signal CDMA systems, such as GPS systems. The invention uses parallel data paths that allow standard correlation of signals in parallel with verification of the lock signal to determine whether the system has locked onto the proper signal within the scanned signal window, The invention can be made with multiple CPUs, a single CPU with dual input modes, on multiple IC chips, or as a single IC chip solution for small, low cost reception, downconversion, correlation, and verification systems.

    摘要翻译： 本发明公开了用于消除诸如GPS系统的弱信号CDMA系统中的自相关和互相关的方法，装置和系统。 本发明使用并行数据路径，允许信号与锁定信号的验证并行地进行标准相关，以确定系统是否锁定在扫描信号窗口内的适当信号上。本发明可以由多个CPU，单个CPU 双重输入模式，多个IC芯片，或作为单个IC芯片解决方案，用于小型，低成本接收，下变频，相关和验证系统。

    METHOD AND SYSTEM FOR EFFICIENT DSSS FFT PROCESSING EMPLOYING PRIME FACTOR DECOMPOSITION
    6.
    发明申请
    METHOD AND SYSTEM FOR EFFICIENT DSSS FFT PROCESSING EMPLOYING PRIME FACTOR DECOMPOSITION 有权
    有效DSSS FFT处理的主要因素分解方法与系统

    公开(公告)号：US20110150047A1

    公开(公告)日：2011-06-23

    申请号：US12643494

    申请日：2009-12-21

    申请人： Charles Norman ,  Andreas Warloe ,  Charles Abraham ,  Jared Welz

    发明人： Charles Norman ,  Andreas Warloe ,  Charles Abraham ,  Jared Welz

    IPC分类号： H04B1/707

    CPC分类号： H04B1/707

    摘要： A direct-sequence spread spectrum (DSSS) receiver may be operable to process signal samples in frequency domain utilizing a prime factor fast Fourier transform (FFT) circuit and a pseudorandom noise (PRN) code. The DSSS receiver may be operable to transform the signal samples into FFT signal samples using the prime factor FFT circuit, transform the PRN code into a FFT PRN code using the prime factor FFT circuit and multiply the FFT signal samples with the FFT PRN code using the prime factor FFT circuit. The DSSS receiver may be operable to inversely transform the multiplied FFT signal samples into correlated signal samples using a prime factor inverse FFT (IFFT) implemented by the prime factor FFT circuit. The prime factor FFT circuit may comprise a prime length FFT core, a FFT memory, a register bank, a switch, a multiplier and a FFT controller.

    摘要翻译： 直接序列扩频（DSSS）接收机可以用于利用素数因子快速傅立叶变换（FFT）电路和伪随机噪声（PRN）码来处理频域中的信号样本。 DSSS接收机可以用于使用素数FFT电路将信号样本变换成FFT信号样本，使用素数FFT电路将PRN码变换成FFT PRN码，并使用FFT PRN码将FFT信号样本与FFT PRN码相乘 素因子FFT电路。 DSSS接收机可以使用由素数因子FFT电路实现的素因子逆FFT（IFFT）将乘法的FFT信号样本反相变换为相关的信号样本。 素因子FFT电路可以包括素数FFT核心，FFT存储器，寄存器组，开关，乘法器和FFT控制器。

    Generic satellite positioning system receivers with selectable inputs and outputs
    7.
    发明申请
    Generic satellite positioning system receivers with selectable inputs and outputs 有权
    具有可选输入和输出的通用卫星定位系统接收器

    公开(公告)号：US20070040738A1

    公开(公告)日：2007-02-22

    申请号：US11510122

    申请日：2006-08-25

    申请人： Anthony Orler ,  Keith Brodie ,  Charles Norman

    发明人： Anthony Orler ,  Keith Brodie ,  Charles Norman

    IPC分类号： G01S5/14 ,  G01C21/00

    CPC分类号： G01S19/37 ,  G01S5/0009 ,  G01S19/14 ,  G01S19/35

    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.

    摘要翻译： 提供通用SATPS接收机和用于配置包括多个输出的通用SATPS接收机的方法。 这些可配置的SATPS接收器适于在多个特定SATPS接收机应用中的至少一个中使用，并且还可以包括多个输入路径，以及用于产生多个可能输出中的选定的输入的装置。 基于特定接收机应用程序的至少一个要求来配置或编程通用SATPS接收器以用作用于特定SATPS接收机应用或操作环境的SATPS接收机的多个输出中的选定的输出被启用/禁用。 多个输出中的所选择的输出可以由特定的SATPS接收机应用或操作环境来定义并且可以被这些输出所使用。 因此，提供可以在多个应用中使用的SATPS接收机，其可以接受多种类型的辅助数据，并且根据用户的应用和/或需求具有多种类型的输出。 SATPS接收机可以在包括提供SATPS信息的至少一个卫星，通用SATPS接收机和远程计算机的SATPS系统中实现。

    METHOD AND SYSTEM FOR INTEGRATED GLONASS AND GPS PROCESSING
    8.
    发明申请
    METHOD AND SYSTEM FOR INTEGRATED GLONASS AND GPS PROCESSING 失效
    综合GLONASS和GPS处理方法与系统

    公开(公告)号：US20110193744A1

    公开(公告)日：2011-08-11

    申请号：US12701004

    申请日：2010-02-05

    申请人： Andreas Warloe ,  Charles Norman ,  Charles Abraham

    发明人： Andreas Warloe ,  Charles Norman ,  Charles Abraham

    IPC分类号： G01S19/33

    CPC分类号： G01S19/33 ,  G01S19/36 ,  G01S19/37 ,  G01S19/425

    摘要： An integrated global navigation satellite system (GNSS) receiver may be operable to decompose GNSS IF signals associated with GPS satellites and/or GLONASS satellites into a constituent narrowband GPS data stream and/or a plurality of constituent narrowband GLONASS data streams utilizing, for example, a GPS IF tuner and/or one or more GLONASS IF tuners. The narrowband GLONASS data streams and/or the narrowband GPS data stream may be processed at reduced sampling rates utilizing a shared sample memory in the integrated GNSS receiver. The narrowband GLONASS data streams and/or the narrowband GPS data stream may be stored in allocated sections of the shared sample memory. The stored narrowband GLONASS data streams and/or the stored narrowband GPS data stream may be processed using a correlation such as a fast Fourier transform (FFT) correlation.

    摘要翻译： 集成的全球导航卫星系统（GNSS）接收机可以用于将与GPS卫星和/或GLONASS卫星相关联的GNSS IF信号分解为组成窄带GPS数据流和/或多个构成窄带GLONASS数据流，例如， GPS IF调谐器和/或一个或多个GLONASS IF调谐器。 窄带GLONASS数据流和/或窄带GPS数据流可以利用集成GNSS接收机中的共享采样存储器以降低的采样率来处理。 窄带GLONASS数据流和/或窄带GPS数据流可以存储在共享采样存储器的分配部分中。 存储的窄带GLONASS数据流和/或存储的窄带GPS数据流可以使用诸如快速傅里叶变换（FFT）相关的相关性来处理。

    System and method for GPS navigation before signal bit synchronization
    9.
    发明授权
    System and method for GPS navigation before signal bit synchronization 失效
    信号位同步前的GPS导航系统及方法

    公开(公告)号：US07064709B1

    公开(公告)日：2006-06-20

    申请号：US11082276

    申请日：2005-03-17

    申请人： Shawn Weisenburger ,  Charles Norman

    发明人： Shawn Weisenburger ,  Charles Norman

    IPC分类号： G01S5/02 ,  H04B7/185

    CPC分类号： G01S19/24 ,  G01S19/42

    摘要： A system and method are provided for determining a position of a Global Positioning System (GPS) receiver prior to bit and frame synchronization. As such, the time-to-first-fix is substantially reduced. More specifically, pseudoranges to five GPS satellites are measured by correlating locally generated Pseudo-Random Number (PRN) codes with signals received from the GPS satellites. After correlation, the pseudorange measurements are correct with an unknown integer number of milliseconds error, which is different for each of the pseudorange measurements. Using the measurements of the pseudoranges and a mathematical model where each of the pseudorange measurements is forced to have a common channel time error, the user position and the common channel time error are determined prior to bit and frame synchronization.

    摘要翻译： 提供了一种在比特和帧同步之前确定全球定位系统（GPS）接收机的位置的系统和方法。 这样，大大减少了时间到第一固定。 更具体地说，通过将本地产生的伪随机数（PRN）码与从GPS卫星接收的信号相关联来测量到五个GPS卫星的伪距。 在相关之后，伪距测量是正确的，具有未知的整数毫秒误差，这对于每个伪距测量是不同的。 使用伪距的测量和其中每个伪距测量被强制具有公共信道时间误差的数学模型，在比特和帧同步之前确定用户位置和公共信道时间误差。

    Strong signal cancellation to enhance processing of weak spread spectrum signal
    10.
    发明申请
    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：US20050032513A1

    公开(公告)日：2005-02-10

    申请号：US10706167

    申请日：2003-11-12

    申请人： Charles Norman ,  Charles Cahn

    发明人： Charles Norman ,  Charles Cahn

    IPC分类号： G01S1/00 ,  H04B1/7107 ,  H04Q7/20

    CPC分类号： H04B1/7107 ,  G01S19/21 ,  G01S19/246 ,  G01S19/30

    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。