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1. 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.

2. 发明授权

US5897605A Spread spectrum receiver with fast signal reacquisition 失效
标题翻译：扩频接收机具有快速信号反馈
公开(公告)号：US5897605A
公开(公告)日：1999-04-27
申请号：US638882
申请日：1996-04-25
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
IPC分类号： G01C21/26 , G01C22/00 , G01S1/00 , G01S5/14 , G01S19/30 , G01S19/34 , G01S19/47 , G01S19/50 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B7/216 , G01C21/00 , H04L7/185
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/50 , H04B1/707 , H04B7/216 , G01S19/11 , H04B1/7115 , H04B2201/70715
摘要： A spread spectrum receiver, such as a GPS car navigation system, uses multiple, parallel correlations of data in a wide capture window, permits seamless tracking and rapid reacquisition of satellite signals at speeds sufficient to permit position information updates during momentary views available of satellites in intersections. The received data is processed in 11 bit samples, for a total of 186 time segments per 1 msec code period, which are each Doppler shifted and multiplexed into 12 channels. The code correlations are performed 22 times per channel by shifting the 11 bit locally generated code by one bit each correlation. The chip rate of the incoming data is 2f.sub.0 and the correlations are performed at 48f.sub.0 providing a time magnification advantage of 24.
摘要翻译：诸如GPS汽车导航系统之类的扩频接收机在广泛采集窗口中使用数据的多个并行相关性，允许无缝跟踪和快速重新捕获卫星信号，速度足以允许在可用于卫星的瞬时视图中进行位置信息更新十字路口接收到的数据以11位采样进行处理，每1毫秒代码周期共计186个时间段，每个多普勒频移并多路复用为12个通道。通过将11位本地生成的代码移位一位每个相关，代码相关性每个通道执行22次。输入数据的码片速率为2f0，并且在48f0处执行相关性，提供24倍的时间放大优势。

3. 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。

4. 发明授权

US06748015B2 Spread spectrum receiver with multi-bit correlator 有权
标题翻译：具有多位相关器的扩频接收机
公开(公告)号：US06748015B2
公开(公告)日：2004-06-08
申请号：US10101138
申请日：2002-03-18
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
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.
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。

5. 发明授权

US6041280A GPS car navigation system 失效
标题翻译： GPS导航系统
公开(公告)号：US6041280A
公开(公告)日：2000-03-21
申请号：US637537
申请日：1996-04-25
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
IPC分类号： G01C21/26 , G01C22/00 , G01S1/00 , G01S19/11 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/50 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B7/216 , G06G7/78 , G01S5/00
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/50 , H04B1/707 , H04B7/216 , G01S19/11 , H04B1/7115 , H04B2201/70715
摘要： A GPS car navigation system derives GPS position update information from motion of the car along the actual track. Turns along the track are detected when they actually occur and are compared with the predicted turns so that the time and position at the actual turn can be used to update the then current GPS derived position of the vehicle. Updating position information with actual turn data improves the accuracy of GPS navigation especially during single satellite navigation.
摘要翻译： GPS汽车导航系统从实际轨道上的汽车运动中导出GPS位置更新信息。轨道的转弯在实际发生时被检测出来，并与预测的转弯进行比较，以便可以使用实际转弯时间和位置来更新当时的GPS导航位置。使用实际转向数据更新位置信息可以提高GPS导航的精度，特别是在单卫星导航期间。

6. 发明授权

US5901171A Triple multiplexing spread spectrum receiver 失效
标题翻译：三重复用扩频接收机
公开(公告)号：US5901171A
公开(公告)日：1999-05-04
申请号：US638021
申请日：1996-04-25
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
IPC分类号： G01C21/26 , G01C22/00 , G01S1/00 , G01S5/14 , G01S19/30 , G01S19/34 , G01S19/47 , G01S19/50 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B7/216 , H04K1/00
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/26 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/48 , G01S19/50 , H04B1/707 , H04B7/216 , G01S19/11 , H04B1/7115 , H04B2001/70706 , H04B2201/70715
摘要： A GPS car navigation system permits single satellite navigation by representing the x and y unknowns with on-track and cross track vectors and estimating the z and t unknowns. An estimate of the y unknown, representing the maximum width of the track or roadway, is thereby combined with altitude and clock hold estimates to derive GPS position information along the predicted track. Turns along the track are detected when they actually occur and are compared with the predicted turns so that the time and position at the actual turn can be used to update the then current GPS derived position of the vehicle. Updating position information with actual turn data improves the accuracy of GPS navigation especially when using single satellite navigation. Multiple, parallel correlations of data in a wide capture window extending, at 1/2 chip width intervals or less from the predicted prompt correlation delay of a previously tracked satellite, permits seamless tracking and rapid reacquisition at speeds sufficient to permit position information updates during momentary view available of satellites in intersections. The satellite tracking and data processing is implemented in an ASIC which is configured to use a minimum number of gates. The received data is processed in 11 bit samples, for a total of 186 time segments per 1 msec code period, which are each doppler shifted and multiplexed into 12 channels. The code correlations are performed 22 times per channel by shifting the 11 bit locally generated code by one bit each correlation. The chip rate of the incoming data is 2f.sub.0 and the correlations are performed at 48f.sub.0 providing a time magnification advantage of 24.
摘要翻译： GPS导航系统通过用轨道和交叉轨道矢量表示x和y未知数，并且估计z和t未知数，允许单个卫星导航。因此，代表轨道或道路的最大宽度的y未知的估计与高度和时钟保持估计相结合以导出沿预测轨道的GPS位置信息。轨道的转弯在实际发生时被检测出来，并与预测的转弯进行比较，以便可以使用实际转弯时间和位置来更新当时的GPS导航位置。使用实际转向数据更新位置信息可提高GPS导航的准确性，特别是在使用单个卫星导航时。在先前跟踪的卫星的预测的快速相关延迟中，在+ E，fra 1/2 + EE芯片宽度间隔或更小的宽捕获窗口中的数据的多个并行相关性允许无缝跟踪和快速重新采集，速度足以允许在交叉点的卫星的瞬间视图中更新位置信息。卫星跟踪和数据处理在被配置为使用最少数量的门的ASIC中实现。接收的数据以11位采样进行处理，每1毫秒编码周期共计186个时间段，每个多普勒频移并复用为12个通道。通过将11位本地生成的代码移位一位每个相关，代码相关性每个通道执行22次。输入数据的码片速率为2f0，并且在48f0处执行相关性，提供24倍的时间放大优势。

7. 发明授权

US07729413B2 Spread spectrum receiver with multi-bit correlator 有权
标题翻译：具有多位相关器的扩频接收机
公开(公告)号：US07729413B2
公开(公告)日：2010-06-01
申请号：US10835948
申请日：2004-04-30
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： H04B1/69 , H04L27/06
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 system and a method to track GPS (Global Positioning System) satellite signal in a GPS receiver that includes an expanded capture window to rapidly reacquire the satellite signal after the satellite signal has been obstructed or when there is other type of signal loss. The expanded capture window includes a plurality of additional early and late correlations for maintaining synchronization of the GPS signal with a generated replica signal when positional error has accumulated during the time of the signal loss. The plurality of additional early and late correlations may be delayed from each other by a multiple of a fraction of a chip and may be performed in one or multiple channels of the GPS receiver. The adjoining code samples in the replica signal may also be offset by a fraction of a chip or by a multiple of the fraction of a chip.
摘要翻译：一种在GPS接收机中跟踪GPS（全球定位系统）卫星信号的系统和方法，其包括扩展的捕获窗口，以在卫星信号被阻塞之后或当存在其它类型的信号丢失时快速重新获取卫星信号。扩展的捕获窗口包括多个附加的早期和晚期相关性，用于在信号丢失时间期间积累位置误差时，保持GPS信号与生成的复制信号的同步。多个附加的早期和晚期相关可以由芯片的一小部分的倍数彼此延迟，并且可以在GPS接收机的一个或多个信道中执行。复制信号中的相邻代码样本也可以被芯片的一部分或芯片的分数的倍数所抵消。

8. 发明授权

US07295633B2 Triple multiplexing spread spectrum receiver 有权
标题翻译：三重复用扩频接收机
公开(公告)号：US07295633B2
公开(公告)日：2007-11-13
申请号：US10903098
申请日：2004-07-30
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
IPC分类号： H04L27/06 , H04B7/185 , G01C21/00
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/26 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/48 , G01S19/50 , H04B1/707 , H04B1/7115 , H04B7/216 , H04B2001/70706 , H04B2201/70715
摘要： A GPS car navigation system derives GPS position update information from motion of the car along the actual track. Turns along the track are detected when they actually occur and are compared with the predicted turns so that the time and position at the actual turn can be used to update the then current GPS derived position of the vehicle. Updating position information with actual turn data improves the accuracy of GPS navigation especially during single satellite navigation.
摘要翻译： GPS汽车导航系统从实际轨道上的汽车运动中导出GPS位置更新信息。轨道的转弯在实际发生时被检测出来，并与预测的转弯进行比较，以便可以使用实际转弯时间和位置来更新当时的GPS导航位置。使用实际转向数据更新位置信息可以提高GPS导航的精度，特别是在单卫星导航期间。

9. 发明申请

US20050002447A1 Triple multiplexing spread spectrum receiver 有权
标题翻译：三重复用扩频接收机
公开(公告)号：US20050002447A1
公开(公告)日：2005-01-06
申请号：US10903098
申请日：2004-07-30
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
IPC分类号： G01C21/26 , G01C22/00 , G01S1/00 , G01S5/14 , G01S19/30 , G01S19/34 , G01S19/47 , G01S19/50 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B7/216 , H04K1/00
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/26 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/48 , G01S19/50 , H04B1/707 , H04B1/7115 , H04B7/216 , H04B2001/70706 , H04B2201/70715
摘要： A spread spectrum receiver processes signals from a plurality of sources modulated by different spread spectrum codes by sampling the signals as received to produce an integer series of sampling segments at a sampling rate at least twice a chip rate of the codes, each sampling segment containing an integer number of bits representing a fraction of a chip of the codes, time division multiplexing each sample segment into a number of channels, correlating the bits in each sample segment in each channel in parallel with a source specific series of locally generated sequential code samples differing by one bit, summing each parallel correlation, and accumulating the summed parallel correlations for each code sample in each channel at a rate at least equal to the chip rate to derive data related to each of the sources.
摘要翻译：扩展频谱接收机通过对接收到的信号进行采样来处理来自由不同扩展频谱码调制的多个源的信号，以便采样速率至少为代码码片速率的两倍，每个采样段包含一个采样段代表代码码片的一部分的整数位，将每个采样段时分复用为多个信道，将每个信道中的每个采样分段中的比特与本地生成的不同序列码样本的源特定序列并行地相关一个比特，对每个并行相关求和，并且以至少等于码片速率的速率累加每个信道中的每个码样本的求和的并行相关性，以得到与每个源相关的数据。

10. 发明授权

US06788735B2 Triple multiplexing spread spectrum receiver 有权
标题翻译：三重复用扩频接收机
公开(公告)号：US06788735B2
公开(公告)日：2004-09-07
申请号：US10320932
申请日：2002-12-16
申请人： Sanjai Kohli , Steven Chen
发明人： Sanjai Kohli , Steven Chen
IPC分类号： H04B1500
CPC分类号： H04B1/7085 , G01C21/26 , G01C22/00 , G01S19/11 , G01S19/26 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/47 , G01S19/48 , G01S19/50 , H04B1/707 , H04B1/7115 , H04B7/216 , H04B2001/70706 , H04B2201/70715
摘要： A spread spectrum receiver processes signals from a plurality of sources modulated by different spread spectrum codes by sampling the signals as received to produce an integer series of sampling segments at a sampling rate at least twice a chip rate of the codes, each sampling segment containing an integer number of bits representing a fraction of a chip of the codes, time division multiplexing each sample segment into a number of channels, correlating the bits in each sample segment in each channel in parallel with a source specific series of locally generated sequential code samples differing by one bit, summing each parallel correlation, and accumulating the summed parallel correlations for each code sample in each channel at a rate at least equal to the chip rate to derive data related to each of the sources.
摘要翻译：扩展频谱接收机通过对接收到的信号进行采样来处理来自由不同扩展频谱码调制的多个源的信号，以产生代码码片速率的至少两倍的采样率的整数序列的采样段，每个采样段包含代表代码码片的一部分的整数位，将每个采样段时分复用为多个信道，将每个信道中的每个采样段中的位与本地生成的不同序列码样本的源特定序列并行地相关一个比特，对每个并行相关求和，并且以至少等于码片速率的速率累加每个信道中的每个码样本的求和的并行相关性，以得到与每个源相关的数据。

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