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1. 发明授权

US07860145B2 Adaptive code generator for satellite navigation receivers 有权
标题翻译：用于卫星导航接收机的自适应码发生器
公开(公告)号：US07860145B2
公开(公告)日：2010-12-28
申请号：US11417965
申请日：2006-05-03
申请人： Jerry Eugene Knight , Charles R. Cahn , David Man Kui Li
发明人： Jerry Eugene Knight , Charles R. Cahn , David Man Kui Li
IPC分类号： H04B1/00
CPC分类号： H04B1/707 , G01S19/30 , G01S19/33 , G01S19/37 , H04B2201/70707 , H04B2201/70715 , H04J13/00 , H04J13/10
摘要： A satellite navigation device including a receiver having an adjustable code generator is described. The adjustable code generator is configurable to generate a set of spread-spectrum code signals. Each spread-spectrum code signal has a respective length corresponding to a repetition period. The set of spread-spectrum code signals includes first and second spread-spectrum code signals having distinct first and second lengths.
摘要翻译：描述了包括具有可调节代码生成器的接收器的卫星导航装置。可调节码发生器可配置为产生一组扩频码信号。每个扩频码信号具有对应于重复周期的相应长度。扩频码信号的集合包括具有不同的第一和第二长度的第一和第二扩频码信号。

2. 发明授权

US07630458B2 Phase sampling techniques using amplitude bits for digital receivers 有权
标题翻译：使用数字接收机幅度位的相位采样技术
公开(公告)号：US07630458B2
公开(公告)日：2009-12-08
申请号：US11510121
申请日：2006-08-25
申请人： Charles P. Norman , Charles R. Cahn
发明人： Charles P. Norman , Charles R. Cahn
IPC分类号： H03K9/00
CPC分类号： H04L27/2338 , G01S19/21 , G01S19/24 , G01S19/29 , H03D7/16 , H04L27/2337
摘要： The present invention uses at least one amplitude bit to assist the phase-sampling technique used in digital receiver architectures. For digital receivers where the Intermediate Frequency (IF) is an integer multiple of the fundamental frequency f0, the present invention provides reduced processing complexity and reduced power consumption. The present invention allows the digital receiver to avoid performing coordinate rotation at high speeds, and replaces such a coordinate rotation with a simple phase subtraction. This replacement of the coordinate rotation allows the receiver to use a less complicated design, and to consume less power as a result.
摘要翻译：本发明使用至少一个幅度比特来辅助数字接收机架构中使用的相位采样技术。对于中频（IF）是基频f0的整数倍的数字接收机，本发明提供降低的处理复杂度和降低的功耗。本发明允许数字接收机避免高速执行坐标旋转，并以简单的相位相减代替这种坐标旋转。这种替换坐标旋转允许接收机使用较不复杂的设计，并因此消耗更少的功率。

3. 发明授权

US07113552B1 Phase sampling techniques using amplitude bits for digital receivers 有权
标题翻译：使用数字接收机幅度位的相位采样技术
公开(公告)号：US07113552B1
公开(公告)日：2006-09-26
申请号：US10036788
申请日：2001-12-21
申请人： Charles P. Norman , Charles R. Cahn
发明人： Charles P. Norman , Charles R. Cahn
IPC分类号： H04L27/22
CPC分类号： H04L27/2338 , G01S19/21 , G01S19/24 , G01S19/29 , H03D7/16 , H04L27/2337
摘要： The present invention uses at least one amplitude bit to assist the phase-sampling technique used in digital receiver architectures. For digital receivers where the Intermediate Frequency (IF) is an integer multiple of the fundamental frequency fo, the present invention provides reduced processing complexity and reduced power consumption. The present invention allows the digital receiver to avoid performing coordinate rotation at high speeds, and replaces such a coordinate rotation with a simple phase subtraction. This replacement of the coordinate rotation allows the receiver to use a less complicated design, and to consume less power as a result.
摘要翻译：本发明使用至少一个幅度比特来辅助数字接收机架构中使用的相位采样技术。对于中频（IF）是基频f的整数倍的数字接收机，本发明提供了降低的处理复杂度和降低的功耗。本发明允许数字接收机避免高速执行坐标旋转，并以简单的相位相减代替这种坐标旋转。这种替换坐标旋转允许接收机使用较不复杂的设计，并因此消耗更少的功率。

4. 发明授权

US06724811B2 Pseudo-noise correlator for GPS spread-spectrum receiver 有权
公开(公告)号：US06724811B2
公开(公告)日：2004-04-20
申请号：US10099497
申请日：2002-03-13
申请人： Sanjai Kohli , Steven Chen , Charles R. Cahn , Mangesh Chansarkar , Greg Turetsky
发明人： Sanjai Kohli , Steven Chen , Charles R. Cahn , Mangesh Chansarkar , Greg Turetsky
IPC分类号： H04B169
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/22 , G01S19/235 , G01S19/29 , G01S19/30 , G01S19/34 , G01S19/37 , G01S19/47 , G01S19/49 , G01S19/50 , H04B1/707 , H04B1/709 , H04B1/7095 , H04B1/7115 , H04B7/216 , H04B2001/70706 , H04B2201/70715
摘要： A terrestrial C/A code GPS receiver system digitally samples, filters and stores a segment of 11 half chips of the received composite as a binary number and multiplexes this number for parallel correlation with each of a series of multibit code replicas for the satellites to be tracked. Each of the time delay specific correlation products are accumulated in a cell of a memory matrix so that at least twenty two delays for each satellite may be evaluated each code period providing fast reacquisition, even within a city intersection, as well as correction of multipath tracking and multipath interference. All cells of the memory matrix may be used for an acquisition of a single satellite in about 4 ms. Two satellite tracking, in addition to altitude hold, uses cross track hold alternating with clock hold to update the cross track estimate. Single satellite tracking uses cross track and clock hold together. Navigation data is updated with detected changes in motion including turns.

5. 发明授权

US5535278A Global positioning system (GPS) receiver for recovery and tracking of signals modulated with P-code 失效
标题翻译：全球定位系统（GPS）接收机，用于恢复和跟踪用P码调制的信号
公开(公告)号：US5535278A
公开(公告)日：1996-07-09
申请号：US236291
申请日：1994-05-02
申请人： Charles R. Cahn , Richard G. Keegan , Jerry E. Knight , Thomas A. Stansell, Jr.
发明人： Charles R. Cahn , Richard G. Keegan , Jerry E. Knight , Thomas A. Stansell, Jr.
IPC分类号： G01S1/00 , G01S19/09 , G01S19/39 , H04B1/707 , H04L9/00
CPC分类号： G01S19/32 , G01S19/24 , H04B1/707
摘要： Method and apparatus for improving the speed and accuracy of processing signals from global positioning system (GPS) receivers by ensuring access to GPS carrier signals that have been modulated with an encrypted P-code sequence. In one disclosed embodiment of the invention, GPS L1 and L2 signals are correlated with a locally generated P-code signal, bandpass filtered to enhance signal-to-noise ratio performance, and then cross-correlated to obtain a signal with an L1-L2 frequency component that facilitates the resolution of carrier cycle ambiguity. In another embodiment, received GPS signals are immediately converted to digital form, then digitally correlated with in-phase and quadrature components of a locally generated P-code signal. Signals resulting from the correlation are then integrated over timing intervals corresponding to a previously determined encryption period to provide in-phase (I) and quadrature (Q) samples. In one variant of this embodiment, the I and Q samples derived from the L2 GPS signal are digitally squared to obtain an L2 carrier. In another variant, I and Q samples derived from both L1 and L2 signals are cross-correlated to obtain a digital carrier with an L 1-L2 component. Tracking errors for the L1 and L2 P-code signals are computed using a similar digital technique.
摘要翻译：用于通过确保访问已经用加密的P代码序列调制的GPS载波信号来提高来自全球定位系统（GPS）接收机的处理信号的速度和精度的方法和装置。在本发明的一个公开的实施例中，GPS L1和L2信号与本地生成的P码信号相关，经过滤波以提高信噪比性能，然后互相关以获得具有L1-L2 有助于解决载波周期模糊的频率分量。在另一个实施例中，接收到的GPS信号被立即转换成数字形式，然后与本地产生的P码信号的同相和正交分量数字相关。然后，通过相应于先前确定的加密周期的定时间隔来集成由相关产生的信号，以提供同相（I）和正交（Q）采样。在该实施例的一个变型中，从L2 GPS信号导出的I和Q样本是数字平方的，以获得L2载波。在另一变型中，从L1和L2信号两者导出的I和Q样本是相互关联的，以获得具有L 1-L2分量的数字载波。使用类似的数字技术计算L1和L2 P码信号的跟踪误差。

6. 发明授权

US08243772B2 Adaptive code generator for satellite navigation receivers 有权
标题翻译：用于卫星导航接收机的自适应码发生器
公开(公告)号：US08243772B2
公开(公告)日：2012-08-14
申请号：US12955823
申请日：2010-11-29
申请人： Jerry Eugene Knight , Charles R. Cahn , David Man Kui Li
发明人： Jerry Eugene Knight , Charles R. Cahn , David Man Kui Li
IPC分类号： H04B1/00
CPC分类号： H04B1/707 , G01S19/30 , G01S19/33 , G01S19/37 , H04B2201/70707 , H04B2201/70715 , H04J13/00 , H04J13/10
摘要： An adjustable code generator is configurable to generate any of a plurality of spread-spectrum code signals. The adjustable code generator includes a feedback polynomial mask table to contain a set of feedback polynomial masks. Respective feedback polynomial masks of the set correspond to respective spread-spectrum code signals of the plurality of spread-spectrum code signals. The adjustable code generator also includes control logic to select any of the feedback polynomial masks of the set contained in the feedback polynomial mask table, and further includes a shift register to provide, at an output, a respective spread-spectrum code signal that corresponds to a feedback polynomial mask selected by the control logic and to receive feedback generated using the feedback polynomial mask selected by the control logic.
摘要翻译：可调节码发生器可配置为产生多个扩频码信号中的任何一个。可调节代码生成器包括反馈多项式掩码表以包含一组反馈多项式掩码。该集合的相应反馈多项式掩码对应于多个扩频码信号的各个扩频码信号。可调码生成器还包括控制逻辑，用于选择反馈多项式掩码表中包含的集合的反馈多项式掩模中的任何一个，并且还包括移位寄存器，用于在输出端提供对应于由控制逻辑选择的反馈多项式掩模，并接收使用由控制逻辑选择的反馈多项式掩码产生的反馈。

7. 发明授权

US07912158B2 Sampling threshold and gain for satellite navigation receiver 有权
标题翻译：卫星导航接收机的采样阈值和增益
公开(公告)号：US07912158B2
公开(公告)日：2011-03-22
申请号：US11270253
申请日：2005-11-08
申请人： Charles R. Cahn , Jerry Eugene Knight
发明人： Charles R. Cahn , Jerry Eugene Knight
IPC分类号： H04L27/08
CPC分类号： G01S19/21 , H03G3/3052 , H04B1/7097 , H04B2201/70715
摘要： A satellite navigation device including a flexible radio frequency (RF) receiver is described. The receiver receives a signal that includes at least a first spread-spectrum signal from a first satellite. The receiver has a first channel that includes an analog-to-digital (A/D) converter to sample and quantize the signal and an automatic gain control (AGC) to adjust an amplification of the signal. The A/D converter has a first non-zero quantization threshold magnitude and a second non-zero quantization threshold magnitude. The AGC may adjust a gain in accordance with the first non-zero quantization threshold magnitude. The gain may correspond to a first pre-determined probability of a non-zero sample and the second non-zero quantization threshold magnitude may correspond to a second pre-determined probability of a non-zero sample.
摘要翻译：描述了包括灵活射频（RF）接收机的卫星导航设备。接收机接收包含来自第一卫星的至少第一扩频信号的信号。接收器具有包括模数（A / D）转换器以对信号进行采样和量化的第一通道，以及自动增益控制（AGC）来调节信号的放大。 A / D转换器具有第一非零量化阈值幅度和第二非零量化阈值幅度。 AGC可以根据第一非零量化阈值幅度调整增益。增益可以对应于非零采样的第一预定概率，而第二非零量化阈值幅度可对应于非零采样的第二预定概率。

8. 发明授权

US07406114B2 Pseudo-noise correlator for GPS spread-spectrum receiver 有权
标题翻译： GPS频谱接收机的伪噪声相关器
公开(公告)号：US07406114B2
公开(公告)日：2008-07-29
申请号：US10722694
申请日：2003-11-24
申请人： Sanjai Kohli , Steven Chen , Charles R. Cahn , Mangesh Chansarkar , Greg Turetsky
发明人： Sanjai Kohli , Steven Chen , Charles R. Cahn , Mangesh Chansarkar , Greg Turetsky
IPC分类号： H04B1/00
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/22 , G01S19/235 , G01S19/29 , G01S19/30 , G01S19/34 , G01S19/37 , G01S19/47 , G01S19/49 , G01S19/50 , H04B1/707 , H04B1/709 , H04B1/7095 , H04B1/7115 , H04B7/216 , H04B2001/70706 , H04B2201/70715
摘要： A terrestrial C/A code GPS receiver system digitally samples, filters and stores a segment of 11 half chips of the received composite as a binary number and multiplexes this number for parallel correlation with each of a series of multibit code replicas for the satellites to be tracked. Each of the time delay specific correlation products are accumulated in a cell of a memory matrix so that at least twenty two delays for each satellite may be evaluated each code period providing fast reacquisition, even within a city intersection, as well as correction of multipath tracking and multipath interference. All cells of the memory matrix may be used for an acquisition of a single satellite in about 4 ms. Two satellite tracking, in addition to altitude hold, uses cross track hold alternating with clock hold to update the cross track estimate. Single satellite tracking uses cross track and clock hold together. Navigation data is updated with detected changes in motion including turns.
摘要翻译：地面C / A码GPS接收机系统对接收到的复合物的11个半码片段进行数字采样，滤波和存储，作为二进制数，并将这个数字进行多路复用，用于与卫星的一系列多位码副本中的每一个并行相关跟踪。时间延迟特定相关乘积中的每一个被累积在存储器矩阵的单元中，使得每个卫星的至少二十二个延迟可以被评估，每个代码周期提供快速重新获取，甚至在城市相交中，以及校正多径跟踪和多路径干扰。存储器矩阵的所有单元可以在大约4毫秒内用于单个卫星的采集。除了高度保持之外，两个卫星跟踪使用交叉轨道保持与时钟保持交替更新交叉轨迹估计。单个卫星跟踪使用交叉轨道和时钟保持在一起。通过检测到的运动变化（包括转弯）来更新导航数据。

9. 发明授权

US07301992B2 Multipath processing for GPS receivers 有权
标题翻译： GPS接收机的多路径处理
公开(公告)号：US07301992B2
公开(公告)日：2007-11-27
申请号：US10813387
申请日：2004-03-30
申请人： Sanjai Kohli , Charles R. Cahn
发明人： Sanjai Kohli , Charles R. Cahn
IPC分类号： H04B1/00
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/22 , G01S19/29 , G01S19/30 , G01S19/34 , G01S19/37 , G01S19/47 , H04B1/707 , H04B1/7115 , H04B7/216 , H04B2001/70706
摘要： A GPS receiver system determines the presence of trackable signals at code delays less than the prompt delay being tracked for a particular, signal and changes the prompt delay to correspond to the smallest code delay having a trackable signal. Trackable signals at large code delays are multipath signals and may be separately tracked to aid in dead reckoning. The trackable signals at code delays not adjacent to the current tracked prompt delay may be tracked in the same channel as the prompt delay so that all satellite channels are continuously evaluated for multipath signals being tracked or a non-satellite specific channel may be used to sequentially step through the satellite signals to evaluate multipath on a satellite by satellite basis.
摘要翻译： GPS接收机系统在代码延迟时确定可跟踪信号的存在，小于针对特定信号跟踪的提示延迟，并改变提示延迟以对应于具有可跟踪信号的最小码延迟。大码延迟的跟踪信号是多路径信号，可以单独跟踪以辅助航位推算。与当前跟踪的提示延迟不相邻的代码延迟处的跟踪信号可以在与提示延迟相同的信道中被跟踪，使得所有卫星信道被连续地评估被跟踪的多路径信号，或者可以使用非卫星专用信道来顺序地逐步通过卫星信号，以卫星方式评估卫星上的多路径。

10. 发明授权

US06917644B2 Spread spectrum receiver with multi-path correction 失效
标题翻译：具有多径校正的扩频接收机
公开(公告)号：US06917644B2
公开(公告)日：2005-07-12
申请号：US09735249
申请日：2000-12-11
申请人： Charles R. Cahn , Mangesh Chansarkar , Sanjai Kohli
发明人： Charles R. Cahn , Mangesh Chansarkar , Sanjai Kohli
IPC分类号： G01C21/26 , G01C22/00 , G01S1/00 , G01S5/14 , G01S19/48 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B7/216 , H04L27/30
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/22 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , H04B1/707 , H04B1/7115 , H04B7/216 , H04B2001/70706 , H04B2201/70715
摘要： A spread spectrum receiver uses a comparison of the magnitude of the code correlation amplitudes at equal power at a one chip spacing to the magnitude at a central position there between to determine if multipath interference is present. The lead or lag error from constructive or destructive multipath interference may also be determined. Inaccuracies due to such interference may then be corrected or minimized by, for example, determining the residual code phase error and/or the prompt or accurate code phase delay.
摘要翻译：扩频接收机使用在一个码片间隔处的相等功率处的码相关幅度的幅度与其间的中心位置处的幅度的比较，以确定是否存在多径干扰。也可以确定建构性或破坏性多路径干扰的引导或延迟误差。然后可以通过例如确定残余码相位误差和/或提示或准确的码相位延迟来校正或最小化由于这种干扰导致的不准确性。

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