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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

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。

3. 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。

4. 发明申请

US20110068958A1 Adaptive Code Generator for Satellite Navigation Receivers 有权
标题翻译：卫星导航接收机的自适应码发生器
公开(公告)号：US20110068958A1
公开(公告)日：2011-03-24
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： H03M7/38
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。

5. 发明授权

US07801481B2 Satellite navigation receiver signal processing architecture 有权
标题翻译：卫星导航接收机信号处理架构
公开(公告)号：US07801481B2
公开(公告)日：2010-09-21
申请号：US11270252
申请日：2005-11-08
申请人： Jerry Eugene Knight
发明人： Jerry Eugene Knight
IPC分类号： H04B7/185
CPC分类号： G01S19/32 , G01S19/33 , G01S19/36 , G01S19/37
摘要： A satellite navigation device including a flexible RF receiver is described. The receiver receives a signal that includes at least one spread-spectrum signal from a first satellite. The receiver has at least a first channel that includes at least two sub-channel circuits. Each sub-channel circuit has at least a first signal generator and a first mixer to receive a respective frequency band in at least the one spread-spectrum signal from the first satellite. The first signal generator provides a respective first signal, having a respective first carrier frequency, to down convert at least a portion of the signal, using the first mixer, to an intermediate frequency that is common to the two sub-channel circuits.
摘要翻译：描述了包括柔性RF接收机的卫星导航设备。接收机接收包括来自第一卫星的至少一个扩频信号的信号。接收机具有至少包括至少两个子信道电路的第一信道。每个子信道电路至少具有第一信号发生器和第一混频器，用于在至少一个来自第一卫星的扩频信号中接收相应的频带。第一信号发生器提供具有相应的第一载波频率的相应的第一信号，以使用第一混频器将信号的至少一部分下变频到两个子信道电路公共的中频。

6. 发明授权

US6160841A Mitigation of multipath effects in global positioning system receivers 失效
标题翻译：在全球定位系统接收机中减轻多径效应
公开(公告)号：US6160841A
公开(公告)日：2000-12-12
申请号：US999553
申请日：1997-11-21
申请人： Thomas Atlee Stansell, Jr. , Jerry Eugene Knight , Richard Gerald Keegan , Charles Robert Cahn
发明人： Thomas Atlee Stansell, Jr. , Jerry Eugene Knight , Richard Gerald Keegan , Charles Robert Cahn
IPC分类号： G01S1/00 , H04B1/7085 , H04B7/005 , H04K1/00
CPC分类号： H04B1/7085 , G01S19/22 , H04B7/005 , H04B2201/70715
摘要： A technique for minimizing or eliminating the effect of multipath signals in a receiver processing pseudorandom (PRN) code signals, such as in a global positioning system (GPS) receiver. The presence of multipath signals adversely affects both code measurements and carrier phase measurements of received PRN signals. One aspect of the invention provides for improved code tracking in the presence of multipath signals, by sampling the received code with a multipath mitigation window (MMW) (FIG. 25D) that results in a code error function (FIG. 25F) that reduces or eliminates the multipath effects. The MMW, which may be any of a number of preferred waveforms (FIGS. 35B-35E), provides a code error function that varies in opposite directions from zero at a desired tracking point (402), but assumes a nearly zero value when the MMW is advanced from the tracking or synchronization point by more than a small fraction of a code chip. Because of this nearly zero code error value on the early side of the desired tracking point, delayed multipath signals will have a corresponding code error function that is nearly zero (FIG. 25F) at the desired tracking point of the directly received signals, and the multipath signals will, therefore, have little or no effect on the desired tracking point and on code synchronization. The effects of multipath signals on carrier phase measurements are minimized by sampling the received signals, together with their possible multipath components, before and immediately after code transitions (vectors A and B, respectively). The vector relationship of the directly received (D) and multipath (M) signals is such that performing a vector average of the two types of samples (A and B) produces the directly received signal (D) and its correct phase, with many, if not all, of the multipath components (M) eliminated.
摘要翻译：一种用于最小化或消除接收机处理伪随机（PRN）码信号中的多径信号对全球定位系统（GPS）接收机的影响的技术。多径信号的存在对接收的PRN信号的码测量和载波相位测量产生不利影响。本发明的一个方面提供了在存在多径信号的情况下通过用多路径减轻窗口（MMW）对接收到的代码进行采样（图25D）来改进代码跟踪，导致代码错误功能（图25F），其减少或消除了多径效应。可以是多个优选波形（图35B-35E）中的任何一个的MMW提供了在期望的跟踪点（402）处与零相反的方向变化的码误差函数，但是当 MMW从跟踪或同步点超过代码芯片的一小部分。由于在期望的跟踪点的早期这个几乎为零的码错误值，延迟的多径信号将具有在直接接收的信号的期望的跟踪点处几乎为零（图25F）的相应的码误差函数，并且因此，多径信号对所需的跟踪点和代码同步几乎没有影响。通过在代码转换之前和之后（分别为向量A和B）对接收到的信号及其可能的多径分量进行采样，使多径信号对载波相位测量的影响最小化。直接接收（D）和多路径（M）信号的向量关系使得执行两种类型的采样（A和B）的矢量平均产生直接接收的信号（D）及其正确的相位，如果不是全部，多路径分量（M）被消除。

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