公开(公告)号：US20110184645A1

公开(公告)日：2011-07-28

申请号：US12695934

申请日：2010-01-28

申请人： Mangesh CHANSARKAR

发明人： Mangesh CHANSARKAR

IPC分类号： G01C21/00 ,  G01S19/47 ,  H04W64/00

CPC分类号： G01C21/28 ,  G01S19/26

摘要： The present invention provides apparatus and methods for improving satellite navigation by assessing the dynamic state of a platform for a satellite navigation receiver and using this data to improve navigation models and satellite tracking algorithms. The dynamic state of the receiver platform may be assessed using only accelerometer data, and does not require inertial navigation system integration. The accelerometers may not need to be very accurate and may not need to be aligned and/or accurately calibrated. A method of accelerometer assisted satellite navigation may comprise: detecting a stationary condition of an accelerometer set; gross-calibrating the accelerometer set when in the stationary condition, wherein gross-calibrating includes determining a combined-bias of the accelerometer set; defining at least two acceleration levels using the combined-bias; collecting accelerometer data; categorizing the accelerometer data into one of the acceleration levels; and utilizing the categorized accelerometer data to enhance satellite navigation.

摘要翻译： 本发明通过评估用于卫星导航接收机的平台的动态状态并使用该数据来改进导航模型和卫星跟踪算法来提供用于改进卫星导航的装置和方法。 可以仅使用加速度计数据来评估接收机平台的动态，并且不需要惯性导航系统集成。 加速度计可能不需要非常精确，并且可能不需要对准和/或精确校准。 加速度计辅助卫星导航的方法可以包括：检测加速度计组的静止状态; 在静止状态下总体校准加速度计组，其中总校准包括确定加速度计组的组合偏置; 使用组合偏差来定义至少两个加速度级别; 收集加速度计数据; 将加速度计数据分类为加速度级之一; 并利用分类的加速度计数据来增强卫星导航。

公开(公告)号：US07903028B2

公开(公告)日：2011-03-08

申请号：US11612421

申请日：2006-12-18

申请人： Chi-Shin Wang ,  Yue-Meng Chen ,  Zhike Jia ,  EnYuan Tu

发明人： Chi-Shin Wang ,  Yue-Meng Chen ,  Zhike Jia ,  EnYuan Tu

IPC分类号： G01S19/07

CPC分类号： H04B7/18589 ,  G01S19/243 ,  G01S19/246 ,  G01S19/27

摘要： The present invention provides systems and methods for downloading navigation data to a satellite receiver under weak signal conditions. In an embodiment, the receiver uses a tracking algorithm to estimate the Doppler frequency and rate of change of the Doppler frequency to compensate the phases of the I/Q samples from the received signal to reduce the effect of the Doppler frequency. In an embodiment, differential detection based data bit decoding is provided. In another embodiment, phase compensation based data bit decoding is provided, in which the phase of samples are rotated to compensate for phase error. In an embodiment, a multiple frame strategy is provided to increase signal-to-noise ratio (SNR) and improve sensitivity, in which similar placed samples in consecutive frames are coherently summed over the consecutive frames. In an embodiment, the samples are weighted to reduce the impact of noise in the multiple frame strategy.

摘要翻译： 本发明提供了在弱信号条件下将导航数据下载到卫星接收机的系统和方法。 在一个实施例中，接收机使用跟踪算法来估计多普勒频率的多普勒频率和变化率，以便从接收信号中补偿I / Q采样的相位，以减少多普勒频率的影响。 在一个实施例中，提供了基于差分检测的数据比特解码。 在另一个实施例中，提供了基于相位补偿的数据比特解码，其中样本的相位被旋转以补偿相位误差。 在一个实施例中，提供多帧策略以增加信噪比（SNR）并提高灵敏度，其中连续帧中的类似放置样本在连续帧上相干相加。 在一个实施例中，加权样本以减少多帧策略中噪声的影响。

公开(公告)号：US07859456B2

公开(公告)日：2010-12-28

申请号：US11548204

申请日：2006-10-10

申请人： Chi-Shin Wang ,  Zongde Qiu ,  Zhike Jia

发明人： Chi-Shin Wang ,  Zongde Qiu ,  Zhike Jia

IPC分类号： G01S19/24 ,  G01S19/25 ,  G01S19/27

CPC分类号： G01S19/27 ,  G01S19/246 ,  G01S19/254

摘要： The present invention provides systems and methods for enabling a navigation signal receiver to perform both data assisted and non-data assisted integration to provide better integration during signal acquisition, reacquisition and tracking. In data assisted integration mode, a receiver uses known or predicted data bits to remove the modulated data bits of a received signal prior to integration. In non data assisted integration mode, when the data bits are not known or predictable, the receiver uses an optimal estimation or maximum likelihood algorithm to determine the polarities of the modulated data bits of the received signal. This may be done by determining which of various possible bit pattern yields the maximum integrated power. When the modulated data bits are not known or predictable over a limited range, the receiver carries out data assisted integration over the known or predictable data bits and additional non data assisted integration.

摘要翻译： 本发明提供了使导航信号接收机能够执行数据辅助和非数据辅助集成的系统和方法，以在信号采集，重新采集和跟踪期间提供更好的集成。 在数据辅助积分模式中，接收机使用已知或预测的数据比特来在积分之前去除接收信号的调制数据比特。 在非数据辅助积分模式中，当数据比特未知或可预测时，接收机使用最优估计或最大似然算法来确定接收信号的调制数据比特的极性。 这可以通过确定各种可能的位模式中的哪一个产生最大集成功率来完成。 当调制数据位在有限范围内不知道或可预测时，接收机通过已知或可预测的数据位和附加的非数据辅助积分来执行数据辅助积分。

公开(公告)号：US07719466B2

公开(公告)日：2010-05-18

申请号：US11676502

申请日：2007-02-19

申请人： Gregory Bret Turetzky ,  Charles P. Norman ,  Henry D. Falk

发明人： Gregory Bret Turetzky ,  Charles P. Norman ,  Henry D. Falk

IPC分类号： G01S5/14

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。 本发明使用允许信号与锁定信号的验证并行的标准相关性的并行数据路径，以确定系统是否锁定在扫描的信号窗口内的适当信号上。 本发明可以由多个CPU，具有双输入模式的单个CPU，多个IC芯片，或作为用于小型，低成本接收，下变频，相关和验证系统的单个IC芯片解决方案制成。

公开(公告)号：US07568670B2

公开(公告)日：2009-08-04

申请号：US11383261

申请日：2006-05-15

申请人： David Wang

发明人： David Wang

IPC分类号： A47G29/00

CPC分类号： B60R11/02 ,  B60R11/0235 ,  B60R11/0258 ,  B60R2011/0005 ,  B60R2011/0056 ,  B60R2011/0063 ,  B60R2011/007 ,  B60R2011/0089

摘要： Flexible mounting devices for navigational/entertainment displays, especially for in-vehicle use, are described herein. In an embodiment, the flexible mounting device comprises a flexible gooseneck, a magnetic base magnetically attached to a front end of the gooseneck for holding a display, and a windshield suction attached to a back end of the gooseneck for providing windshield support from the rear by suctioning to the windshield of a vehicle. In another embodiment, the flexible mounting device comprises a flexible neck, which may be firmly attached to the dashboard of a vehicle with a sticky gel pad. The mounting device also comprises a counter weight attached to a back end of the flexible neck. The display is fixed to a front end of the flexible neck such that the display protrudes beyond the dashboard. The counter weight at the back end of the flexible neck counter balances the weight of the display at the front end, and thereby helps to provide a stable support.

摘要翻译： 本文描述了用于导航/娱乐显示器的灵活安装装置，特别是用于车载使用。 在一个实施例中，柔性安装装置包括柔性鹅颈管，磁性地附接到用于保持显示器的鹅颈管的前端的磁性基座，以及附着到鹅颈管的后端的挡风玻璃吸力，用于从后方提供挡风玻璃支撑 吸入车辆挡风玻璃。 在另一个实施例中，柔性安装装置包括柔性颈部，其可以用粘性凝胶垫牢固地附接到车辆的仪表板。 安装装置还包括附接到柔性颈部的后端的配重。 显示器固定到柔性颈部的前端，使得显示器突出超出仪表板。 柔性颈部计数器后端的配重使前端显示器的重量平衡，从而有助于提供稳定的支撑。

公开(公告)号：US20110077891A1

公开(公告)日：2011-03-31

申请号：US12567478

申请日：2009-09-25

申请人： Michael KOENIG

发明人： Michael KOENIG

IPC分类号： G06F19/00 ,  G01C21/00

CPC分类号： G01P21/00

摘要： Methods for calibrating an accelerometer without needing to use external assistance signals, such as GNSS signals. The invention is applicable to accelerometers generally—in both GPS navigation devices and other devices. A method of calibrating an accelerometer, the accelerometer having a bias, comprises: rotating the accelerometer, wherein the orientation of the axis of the accelerometer changes with respect to the local gravity vector; collecting accelerometer measurements as the accelerometer is moving; and calculating the bias and/or scale factor; wherein the accelerometer measurements are primarily due to local gravity. Furthermore, some embodiments of the present invention include a self-calibration process—a process that does not engage the user's attention. For example, in a self-calibration process for an accelerometer in a cell phone the moving step may be the movement of the phone out of a user's pocket to hold it up to view the screen.

摘要翻译： 无需使用外部辅助信号（如GNSS信号）校准加速度计的方法。 本发明通常适用于GPS导航设备和其他设备中的加速度计。 一种校准加速度计的方法，所述加速度计具有偏置，包括：旋转所述加速度计，其中所述加速度计的轴的取向相对于所述局部重力向量变化; 在加速度计移动时收集加速度计测量值; 并计算偏差和/或比例因子; 其中加速度计测量主要是由于局部重力。 此外，本发明的一些实施例包括自校准过程 - 不涉及用户注意的过程。 例如，在用于手机中的加速度计的自校准过程中，移动步骤可以是将电话从用户的口袋中移动以将其保持以观看屏幕。

公开(公告)号：US07864898B2

公开(公告)日：2011-01-04

申请号：US11383935

申请日：2006-05-17

申请人： Zhike Jia

发明人： Zhike Jia

IPC分类号： H03D1/00 ,  H04B1/00 ,  H04L27/00 ,  G01S1/00

CPC分类号： G01S19/28 ,  G01S19/30

摘要： The present invention provides an elevation based adaptive scheme for setting power threshold in the acquisition of navigational satellite signals. In an embodiment, the elevation based adaptive scheme uses a different series of power thresholds to acquire signals from satellites at different elevation angles instead of using one threshold for all satellites, as is done in the prior art. This scheme exploits the fact that the received signal power level depends on the elevation angle of the satellite at the receiver. This scheme also takes into account the antenna gain variation without having to measure the antenna gain variation.

摘要翻译： 本发明提供了一种用于在获取导航卫星信号中设置功率阈值的基于仰角的自适应方案。 在一个实施例中，基于仰角的自适应方案使用不同系列的功率阈值来从不同仰角的卫星采集信号，而不是像现有技术中那样对所有卫星使用一个阈值。 该方案利用了接收信号功率电平取决于接收机卫星仰角的事实。 该方案还考虑天线增益变化而不必测量天线增益变化。

公开(公告)号：US07743177B2

公开(公告)日：2010-06-22

申请号：US11771976

申请日：2007-06-29

申请人： Zhike Jia ,  Chi-Shin Wang ,  Lianxue Xiong ,  Hongyu Zhang

发明人： Zhike Jia ,  Chi-Shin Wang ,  Lianxue Xiong ,  Hongyu Zhang

IPC分类号： G01S1/00 ,  G01S5/14 ,  G06F3/00

CPC分类号： G01S19/37

摘要： Provided herein is multi-function platform comprising a plurality of devices and a large memory that is external to the devices and shared among the devices. In an embodiment, a Direct Memory Access (DMA) controller is provided for each device to efficiently transfer data between the device and the shared memory. More than one DMA may be provided for a device. For example, separate DMAs may be provided for different components of a device that perform different subfunctions enabling efficient transfer of data between the different components of the device and the shared memory. In another embodiment, each device comprises a local embedded memory and is provided with a DMA for transferring data between the local memory and the shared memory. Examples of devices that can be included in the platform include a GNSS receiver, a audio player, a video player, a wireless communication device, a routing device, or the like.

摘要翻译： 本文提供的是包括多个设备的多功能平台和在设备外部并在设备之间共享的大型存储器。 在一个实施例中，为每个设备提供直接存储器访问（DMA）控制器以在设备和共享存储器之间有效地传输数据。 可以为设备提供多于一个的DMA。 例如，可以为执行不同子功能的设备的不同组件提供单独的DMA，从而能够在设备的不同组件和共享存储器之间有效地传输数据。 在另一个实施例中，每个设备包括本地嵌入式存储器，并且被提供有用于在本地存储器和共享存储器之间传送数据的DMA。 可以包括在平台中的设备的示例包括GNSS接收器，音频播放器，视频播放器，无线通信设备，路由设备等。

公开(公告)号：US07693211B2

公开(公告)日：2010-04-06

申请号：US11379451

申请日：2006-04-20

申请人： Chi-Shin Wang ,  Yue Meng Chen ,  Zhike Jia

发明人： Chi-Shin Wang ,  Yue Meng Chen ,  Zhike Jia

IPC分类号： H04B1/00

CPC分类号： G01S19/24

摘要： Fast Fourier Transform (FFT) based Phase Lock Loops (PLLs) are provided for use in navigational signal receivers. In an embodiment, a navigation receiver correlates a received navigational signal with a locally generated signal into correlation samples, e.g., one-millisecond correlation samples. The navigation receiver includes a FFT based PLL that corrects phase shifts in the correlation samples due to the Doppler frequency by considering both the Doppler frequency and its rate of change, which are obtained from a FFT computation with interpolation. The phase corrected correlation samples are then integrated over a length of a navigation data bit, e.g., 20 milliseconds, to determine the sign of the data bit of the received signal. In another embodiment, a soft decision feedback technique involving integration extending over the present data bit and several prior data bits is used to determine the sign of a present data bit of the received signal.

摘要翻译： 基于快速傅里叶变换（FFT）的锁相环（PLL）被提供用于导航信号接收机。 在一个实施例中，导航接收器将接收到的导航信号与本地生成的信号相关联成相关样本，例如，一毫秒相关样本。 导航接收机包括基于FFT的PLL，其通过考虑从具有插值的FFT计算获得的多普勒频率及其变化率来校正由于多普勒频率引起的相关样本中的相移。 然后将相位校正的相关样本在导航数据位的长度（例如20毫秒）上积分，以确定接收信号的数据位的符号。 在另一个实施例中，使用涉及在当前数据位和若干先前数据位上延伸的积分的软判决反馈技术来确定接收信号的当前数据位的符号。

公开(公告)号：US07477189B2

公开(公告)日：2009-01-13

申请号：US11694786

申请日：2007-03-30

申请人： Chi-Shin Wang ,  Zhike Jia ,  Yue-Meng Chen ,  Jian Cheng ,  EnYuan Tu

发明人： Chi-Shin Wang ,  Zhike Jia ,  Yue-Meng Chen ,  Jian Cheng ,  EnYuan Tu

IPC分类号： G01S5/14 ,  G01S1/04

CPC分类号： H04B1/7075 ,  G01S19/235 ,  G01S19/29

摘要： Provided herein are systems and methods for achieving long coherent integration in a navigational receiver to improve the sensitivity of the receiver and enable the receiver to acquire, reacquire and track signals under very weak signal conditions. In an embodiment, phase compensation is computed based on estimated Doppler frequency, rate of change of the Doppler frequency with time, and second order rate of change of the Doppler frequency. The Doppler frequency may be computed from an orbital model or ephemeris. This phase compensation is used to compensate samples of the input signal for changes in the phase due to the Doppler frequency. Frequency components of the phase-compensated samples are then computed using a frequency analysis such as a Fast Fourier Transform (FFT). The maximum frequency component is taken as an error frequency and used to compensate the samples of the input signal for residual frequency error.

摘要翻译： 本文提供了用于在导航接收机中实现长相干集成以提高接收机的灵敏度并使接收机能够在非常弱的信号条件下获取，重新获取和跟踪信号的系统和方法。 在一个实施例中，基于估计的多普勒频率，多普勒频率随时间的变化率和多普勒频率的二阶变化率来计算相位补偿。 多普勒频率可以从轨道模型或星历计算。 该相位补偿用于补偿由于多普勒频率引起的相位变化的输入信号的样本。 然后使用诸如快速傅立叶变换（FFT）的频率分析来计算相位补偿样本的频率分量。 将最大频率分量作为误差频率，用于补偿输入信号的样本以获得残余频率误差。