公开(公告)号：US20070072623A1

公开(公告)日：2007-03-29

申请号：US11506499

申请日：2006-08-18

申请人： You-Yuh Shyr ,  Mingqiang Cheng ,  Bo Yu

发明人： You-Yuh Shyr ,  Mingqiang Cheng ,  Bo Yu

IPC分类号： H04Q7/20

CPC分类号： G01S19/09 ,  G01S19/05 ,  H04W64/00 ,  H04W84/06 ,  H04W88/08

摘要： A Global Positioning System (GPS) system comprises a user end, a mobile terminal, a positioning server, a GPS application server, and a base station network. The mobile terminal has a GPS receiver to receive GPS information from a plurality of GPS satellites. The positioning server is coupled to the user end through the network. The GPS application server is coupled to the network for communicating with the positioning server, and has a GPS receiver to receive GPS information from GPS satellites so as to calculate a position of the GPS application server. The geographic position of the GPS application server is known, and GPS assistant information is determined based on the calculated position and the geographic position of the GPS application server. The base station network communicates with the mobile terminal to obtain the GPS information of the mobile terminal and locate the mobile terminal based on the GPS information of the mobile terminal and the GPS assistant information.

摘要翻译： 全球定位系统（GPS）系统包括用户端，移动终端，定位服务器，GPS应用服务器和基站网络。 移动终端具有从多个GPS卫星接收GPS信息的GPS接收机。 定位服务器通过网络耦合到用户端。 GPS应用服务器耦合到网络以与定位服务器进行通信，并具有GPS接收机，用于从GPS卫星接收GPS信息，以计算GPS应用服务器的位置。 GPS应用服务器的地理位置是已知的，并且基于计算出的GPS应用服务器的位置和地理位置来确定GPS辅助信息。 基站网络与移动终端通信，获取移动终端的GPS信息，并根据移动终端的GPS信息和GPS辅助信息定位移动终端。

公开(公告)号：US07904096B2

公开(公告)日：2011-03-08

申请号：US11506499

申请日：2006-08-18

申请人： You-Yuh Shyr ,  Mingqiang Cheng ,  Bo Yu

发明人： You-Yuh Shyr ,  Mingqiang Cheng ,  Bo Yu

IPC分类号： H04W24/00

CPC分类号： G01S19/09 ,  G01S19/05 ,  H04W64/00 ,  H04W84/06 ,  H04W88/08

摘要： A Global Positioning System (GPS) system includes multiple GPS application servers. The multiple GPS application servers provide GPS assistant information for locating a mobile terminal. The mobile terminal receives GPS information from multiple GPS satellites. The GPS assistant information is determined based on a GPS position and a geographic position of a GPS application server of the multiple GPS application servers. The GPS application server is nearest of the multiple GPS application servers to the mobile terminal, and the geographic position of the GPS application server is known.

摘要翻译： 全球定位系统（GPS）系统包括多个GPS应用服务器。 多个GPS应用服务器提供用于定位移动终端的GPS辅助信息。 移动终端从多个GPS卫星接收GPS信息。 基于GPS位置和多个GPS应用服务器的GPS应用服务器的地理位置来确定GPS辅助信息。 GPS应用服务器距离移动终端的多个GPS应用服务器最近，GPS应用服务器的地理位置是已知的。

公开(公告)号：US07558312B2

公开(公告)日：2009-07-07

申请号：US11172443

申请日：2005-06-30

申请人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

发明人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

IPC分类号： H04B1/00

CPC分类号： H04B1/7095 ,  G01S19/30 ,  H04B1/70752 ,  H04B2201/70715

摘要： An apparatus for processing spread spectrum signals digitized at a predetermined sampling frequency. The apparatus includes an intermediate frequency signal preprocessing unit, a plurality of parallel block integrators. The intermediate frequency signal preprocessing unit is capable of generating pre-integration results based on an input signal and local reference signals at a predetermined rate. The pre-integration results produced by the intermediate frequency signal preprocessing unit are grouped into sets of pre-integration results. Each set of the pre-integration results contains a predetermined number of pre-integration results. The plurality of parallel block integrators is in communication with the intermediate frequency signal preprocessing unit. Each of the block integrators is capable of receiving, in succession, sets of a predetermined number of pre-integration results, and for each set of predetermined number of pre-integration results, each of the block integrators is capable of performing a plurality of partial correlations based on the set of the predetermined number of pre-integration results and a plurality of shifted segments of a pseudorandom noise code until a next set of pre-integration results are received by the block integrator.

摘要翻译： 一种用于处理以预定采样频率数字化的扩频信号的装置。 该装置包括中频信号预处理单元，多个并行块积分器。 中频信号预处理单元能够以预定速率产生基于输入信号和本地参考信号的预积分结果。 由中频信号预处理单元产生的预积分结果被分组成一组预积分结果。 每组预积分结果包含预定数量的预积分结果。 多个并行块积分器与中频信号预处理单元通信。 每个块积分器能够连续地接收预定数量的预积分结果的集合，并且对于每组预定数量的预积分结果，每个块积分器能够执行多个部分 基于预定数量的预积分结果的集合和伪随机噪声码的多个移位段直到下一组预积分结果被块积分器接收的相关性。

公开(公告)号：US07526015B2

公开(公告)日：2009-04-28

申请号：US11227290

申请日：2005-09-15

申请人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

发明人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

IPC分类号： H04B1/00

CPC分类号： G01S19/30

摘要： A method for processing spread spectrum signals through a two step integration process in a circuit having an intermediate frequency signal preprocessing unit and a plurality of block integrators, wherein the circuit receiving a digitized signal, a local reference signal, and a pseudorandom noise code. The method includes generating a plurality of data streams by the intermediate frequency signal preprocessing unit using the digitized signal and the reference signal, receiving at each block integrator a data stream from the plurality of data streams and the pseudorandom noise code, performing a predetermined number of partial correlations at each block integrator using hybrid correlation technique based on the data stream and the pseudorandom noise code to obtain a predetermined number of partial correlation results, and computing a predetermined number of complete correlation results based on the predetermined number of partial correlation results. Each data stream is generated every predetermined time period.

摘要翻译： 一种在具有中频信号预处理单元和多个块积分器的电路中通过两步积分处理来处理扩频信号的方法，其中电路接收数字化信号，本地参考信号和伪随机噪声码。 该方法包括使用数字化信号和参考信号由中频信号预处理单元生成多个数据流，在每个块积分器处接收来自多个数据流的数据流和伪随机噪声码，执行预定数量的 使用基于数据流和伪随机噪声码的混合相关技术在每个块积分器处的部分相关性，以获得预定数量的部分相关结果，以及基于预定数量的部分相关结果来计算预定数量的完全相关结果。 每个预定时间段都产生每个数据流。

公开(公告)号：US08351486B2

公开(公告)日：2013-01-08

申请号：US12411538

申请日：2009-03-26

申请人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

发明人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

IPC分类号： H04B1/00

CPC分类号： G01S19/30

摘要： An apparatus for processing spread spectrum signals is disclosed. The apparatus includes an intermediate frequency (IF) signal preprocessing unit, which includes a first set of multiply-accumulator (MAC) units and a second set of MAC units. The IF signal preprocessing unit generates a first and a second set of data streams using a digitized signal and a first and second local reference signals respectively. Each data stream is generated every predetermined time period, and each data stream includes pre-integration results generated at a predetermined rate.

摘要翻译： 公开了一种处理扩频信号的装置。 该装置包括中频（IF）信号预处理单元，其包括第一组乘法累加器（MAC）单元和第二组MAC单元。 IF信号预处理单元分别使用数字化信号和第一和第二局部参考信号产生第一和第二组数据流。 每个预定时间周期生成每个数据流，并且每个数据流包括以预定速率产生的预积分结果。

公开(公告)号：US07710317B2

公开(公告)日：2010-05-04

申请号：US11347498

申请日：2006-02-03

申请人： MingQiang Cheng ,  Cheng Li ,  Bo Yu ,  ShiJie Li ,  Xiquan Yang ,  Yi Zeng

发明人： MingQiang Cheng ,  Cheng Li ,  Bo Yu ,  ShiJie Li ,  Xiquan Yang ,  Yi Zeng

IPC分类号： G01S1/00 ,  G01S1/02

CPC分类号： G01S19/25 ,  G01S19/254 ,  G01S19/258

摘要： The present invention is a method for GPS positioning in a weak signal environment. The method includes obtaining assistance data for a GPS signal from a satellite at a predetermined time, wherein the assistance data including predicted navigation data, Doppler shift and Doppler shift rate and the GPS signal being modulated by a carrier signal, a pseudorandom code and navigation data, estimating a predicted receiving time for the GPS signal reaching the GPS receiver, capturing the GPS signal, converting the GPS signal to an intermediate frequency signal, acquiring a code phase of the pseudorandom code from the intermediate frequency signal by using the assistance data and the predicted receiving time, and obtaining a position for the GPS receiver based on the predicted navigation data and the code phase of the pseudorandom code. To acquire the code phase of the pseudorandom code, the GPS receiver corrects a real time clock to one millisecond accuracy and process the intermediate frequency signal through coherent correlation of one second.

摘要翻译： 本发明是一种在弱信号环境中进行GPS定位的方法。 该方法包括在预定时间从卫星获取GPS信号的辅助数据，其中辅助数据包括预测的导航数据，多普勒频移和多普勒频移以及由载波信号调制的GPS信号，伪随机码和导航数据 估计到达GPS接收机的GPS信号的预测接收时间，捕获GPS信号，将GPS信号转换成中频信号，通过使用辅助数据从中频信号获取伪随机码的码相位， 预测的接收时间，并且基于所预测的导航数据和伪随机码的码相位来获得GPS接收机的位置。 为了获取伪随机码的代码阶段，GPS接收机将实时时钟校正为1毫秒精度，并通过1秒的相干相关处理中频信号。

公开(公告)号：US07613258B2

公开(公告)日：2009-11-03

申请号：US11364768

申请日：2006-02-28

申请人： Bo Yu ,  Jianhui Hou ,  ShiJie Li ,  MingQiang Cheng

发明人： Bo Yu ,  Jianhui Hou ,  ShiJie Li ,  MingQiang Cheng

IPC分类号： H03D1/04

CPC分类号： H04B1/7097

摘要： A method for estimating signal quality of a spread spectrum signal is provided. The method includes squaring a plurality of in-phase correlation results and a plurality of quadrature correlation results, summing each squared in-phase correlation result and the corresponding correlation result to obtain a plurality of sum-of-square values, detecting a peak value among the plurality of sum-of-square results, calculating an average of non-peak values among the plurality of sum-of-square results. The peak value is regarded as a signal power value, while the averaged non-peak values are regarded as an average noise power value. A signal-to-noise ratio is then calculated based on the signal power value and the average noise power value. A method for determining the parameters for the tracking loop is also provided. The method includes estimating the signal-to-noise ratio of the spread spectrum signal, and determining the tracking loop parameters based on the signal-to-noise ratio.

摘要翻译： 提供了一种用于估计扩频信号的信号质量的方法。 该方法包括对多个同相相关结果和多个正交相关结果进行平方，对每个平方的同相相关结果和相应的相关结果相加以获得多个平方和值，检测其中的峰值 所述多个平方和结果，计算所述多个平方和结果中的非峰值的平均值。 将峰值视为信号功率值，而将平均非峰值视为平均噪声功率值。 然后基于信号功率值和平均噪声功率值来计算信噪比。 还提供了用于确定跟踪环路的参数的方法。 该方法包括估计扩频信号的信噪比，以及基于信噪比确定跟踪环路参数。

公开(公告)号：US20070002933A1

公开(公告)日：2007-01-04

申请号：US11172443

申请日：2005-06-30

申请人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

发明人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

IPC分类号： H04B1/713

CPC分类号： H04B1/7095 ,  G01S19/30 ,  H04B1/70752 ,  H04B2201/70715

摘要： An apparatus for processing spread spectrum signals digitized at a predetermined sampling frequency. The apparatus includes an intermediate frequency signal preprocessing unit, a plurality of parallel block integrators. The intermediate frequency signal preprocessing unit is capable of generating pre-integration results based on an input signal and local reference signals at a predetermined rate. The pre-integration results Produced by the intermediate frequency signal preprocessing unit are grouped into sets of pre-integration results. Each set of the pre-integration results contains a predetermined number of pre-integration results. The plurality of parallel block integrators is in communication with the intermediate frequency signal preprocessing unit. Each of the block integrators is capable of receiving, in succession, sets of a predetermined number of pre-integration results, and for each set of predetermined number of pre-integration results, each of the block integrators is capable of performing a plurality of partial correlations based on the set of the predetermined number of pre-integration results and a plurality of shifted segments of a pseudorandom noise code until a next set of pre-integration results are received by the block integrator.

摘要翻译： 一种用于处理以预定采样频率数字化的扩频信号的装置。 该装置包括中频信号预处理单元，多个并行块积分器。 中频信号预处理单元能够以预定速率产生基于输入信号和本地参考信号的预积分结果。 由中频信号预处理单元生成的预积分结果被分组成一组预积分结果。 每组预积分结果包含预定数量的预积分结果。 多个并行块积分器与中频信号预处理单元通信。 每个块积分器能够连续地接收预定数量的预积分结果的集合，并且对于每组预定数量的预积分结果，每个块积分器能够执行多个部分 基于预定数量的预积分结果的集合和伪随机噪声码的多个移位段直到下一组预积分结果被块积分器接收的相关性。

公开(公告)号：US20090225816A1

公开(公告)日：2009-09-10

申请号：US12411538

申请日：2009-03-26

申请人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

发明人： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

IPC分类号： H04B1/707

CPC分类号： G01S19/30

摘要： An apparatus for processing spread spectrum signals is disclosed. The apparatus includes an intermediate frequency (IF) signal preprocessing unit, which includes a first set of multiply-accumulator (MAC) units and a second set of MAC units. The IF signal preprocessing unit generates a first and a second set of data streams using a digitized signal and a first and second local reference signals respectively. Each data stream is generated every predetermined time period, and each data stream includes pre-integration results generated at a predetermined rate.

摘要翻译： 公开了一种处理扩频信号的装置。 该装置包括中频（IF）信号预处理单元，其包括第一组乘法累加器（MAC）单元和第二组MAC单元。 IF信号预处理单元分别使用数字化信号和第一和第二局部参考信号产生第一和第二组数据流。 每个预定时间周期生成每个数据流，并且每个数据流包括以预定速率产生的预积分结果。

公开(公告)号：US20070201539A1

公开(公告)日：2007-08-30

申请号：US11364768

申请日：2006-02-28

申请人： Bo Yu ,  Jianhui Hou ,  ShiJie Li ,  MingQiang Cheng

发明人： Bo Yu ,  Jianhui Hou ,  ShiJie Li ,  MingQiang Cheng

IPC分类号： H04B1/00

CPC分类号： H04B1/7097

摘要： A method for estimating signal quality of a spread spectrum signal is provided. The method includes squaring a plurality of in-phase correlation results and a plurality of quadrature correlation results, summing each squared in-phase correlation result and the corresponding correlation result to obtain a plurality of sum-of-square values, detecting a peak value among the plurality of sum-of-square results, calculating an average of non-peak values among the plurality of sum-of-square results. The peak value is regarded as a signal power value, while the averaged non-peak values are regarded as an average noise power value. A signal-to-noise ratio is then calculated based on the signal power value and the average noise power value. A method for determining the parameters for the tracking loop is also provided. The method includes estimating the signal-to-noise ratio of the spread spectrum signal, and determining the tracking loop parameters based on the signal-to-noise ratio.

摘要翻译： 提供了一种用于估计扩频信号的信号质量的方法。 该方法包括对多个同相相关结果和多个正交相关结果进行平方，对每个平方的同相相关结果和相应的相关结果相加以获得多个平方和值，检测其中的峰值 所述多个平方和结果，计算所述多个平方和结果中的非峰值的平均值。 将峰值视为信号功率值，而将平均非峰值视为平均噪声功率值。 然后基于信号功率值和平均噪声功率值来计算信噪比。 还提供了用于确定跟踪环路的参数的方法。 该方法包括估计扩频信号的信噪比，以及基于信噪比确定跟踪环路参数。