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1.发明申请System and method for the mitigation of cdma cross-corrlation artifacts and the improvement of signal-to-noise ratios in tdma location networks 有权用于减轻cdma交叉伪影的系统和方法以及tdma位置网络中信噪比的改善公开(公告)号：US20070058591A1
公开(公告)日：2007-03-15
申请号：US10565874
申请日：2004-08-03
申请人： James Lamance , David Small
发明人： James Lamance , David Small
CPC分类号： H04J13/00 , G01S5/14 , H04B2001/70706
摘要： A correlation system for Time Division Multiple Access (TDMA) positioning systems is disclosed, whereby a position receiver acquires, tracks, and demodulates a plurality of Code Division Multiple Access (CDMA) modulated positioning signals are pulsed in a Time Division Multiple Access (TDMA) scheme. A specialized correlation processor within the position receiver is configured to internally generate pseudo-random number (PRN) code signal replicas of Code Division Multiple Access (CDMA) positioning signals in synchronicity with their respectively received Time Division Multiple Access (TDMA) positioning signals. This correlation system provides the position receiver with range measurements free from the deleterious effects of Code Division Multiple Access (CDMA) cross-correlation artifacts and degraded signal-to-noise ratios, therefore allowing the computation of high accuracy position solutions.
摘要翻译： 公开了一种用于时分多址（TDMA）定位系统的相关系统，其中位置接收机获取，跟踪和解调多个码分多址（CDMA）调制定位信号在时分多址（TDMA） 方案。 位置接收器内的专用相关处理器被配置为与其分别接收的时分多址（TDMA）定位信号同步地内部地生成码分多址（CDMA）定位信号的伪随机数（PRN）码信号复制品。 该相关系统为位置接收机提供了距离码分多址（CDMA）互相关伪影和劣化信噪比的有害影响的距离测量，从而允许计算高精度位置解。
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2.发明授权公开(公告)号：US07466264B2
公开(公告)日：2008-12-16
申请号：US10565873
申请日：2004-08-04
申请人： James Lamance , David Small
发明人： James Lamance , David Small
IPC分类号： G01S1/00
CPC分类号： G01S19/11 , G01S19/05 , G01S19/235 , G01S19/44
摘要： A system and method for providing assistance to a position receiver in a location network consisting of a Global Navigation Satellite System (GNSS) and a synchronized network of positioning-unit devices is disclosed. A positioning-unit device observes the time and frequency of received Global Navigation Satellite System (GNSS) signals relative to the synchronized network of positioning-unit devices. These time and frequency observations are modulated, as assistance data, onto the positioning signals that are broadcast by the positioning-unit devices. A position receiver demodulates the assistance data and analyzes the positioning signals. The position receiver then searches for Global Navigation Satellite System (GNSS) signals in a range responsive to the assistance data and the analysis of the received positioning signals.
摘要翻译： 公开了一种用于向由全球导航卫星系统（GNSS）和定位单元设备的同步网络组成的位置网络中的位置接收机提供帮助的系统和方法。 定位单元设备观察到相对于定位单元设备的同步网络接收到的全球导航卫星系统（GNSS）信号的时间和频率。 将这些时间和频率观测作为辅助数据调制到由定位单元设备广播的定位信号上。 位置接收机解调辅助数据并分析定位信号。 然后，位置接收器在响应于辅助数据和接收到的定位信号分析的范围内搜索全球导航卫星系统（GNSS）信号。
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3.发明授权Mitigation of CDMA cross-correlation artifacts and improvement in signal-to-noise ratio in TDMA location networks 有权CDMA互相关伪影的减轻和TDMA定位网络中信噪比的提高公开(公告)号：US07463617B2
公开(公告)日：2008-12-09
申请号：US10565874
申请日：2004-08-03
申请人： James Lamance , David Small
发明人： James Lamance , David Small
CPC分类号： H04J13/00 , G01S5/14 , H04B2001/70706
摘要： A correlation system for Time Division Multiple Access (TDMA) positioning systems is disclosed, whereby a position receiver acquires, tracks, and demodulates a plurality of Code Division Multiple Access (CDMA) modulated positioning signals are pulsed in a Time Division Multiple Access (TDMA) scheme. A specialized correlation processor within the position receiver is configured to internally generate pseudo-random number (PRN) code signal replicas of Code Division Multiple Access (CDMA) positioning signals in synchronicity with their respectively received Time Division Multiple Access (TDMA) positioning signals. This correlation system provides the position receiver with range measurements free from the deleterious effects of Code Division Multiple Access (CDMA) cross-correlation artifacts and degraded signal-to-noise ratios, therefore allowing the computation of high accuracy position solutions.
摘要翻译： 公开了一种用于时分多址（TDMA）定位系统的相关系统，其中位置接收机获取，跟踪和解调多个码分多址（CDMA）调制定位信号在时分多址（TDMA） 方案。 位置接收器内的专用相关处理器被配置为与其分别接收的时分多址（TDMA）定位信号同步地内部地生成码分多址（CDMA）定位信号的伪随机数（PRN）码信号复制品。 该相关系统为位置接收机提供了距离码分多址（CDMA）互相关伪影和劣化信噪比的有害影响的距离测量，从而允许计算高精度位置解。
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4.发明申请公开(公告)号：US20080129591A1
公开(公告)日：2008-06-05
申请号：US10565873
申请日：2004-08-04
申请人： James Lamance , David Small
发明人： James Lamance , David Small
CPC分类号： G01S19/11 , G01S19/05 , G01S19/235 , G01S19/44
摘要： A system and method for providing assistance to a position receiver in a location network consisting of a Global Navigation Satellite System (GNSS) and a synchronized network of positioning-unit devices is disclosed. A positioning-unit device observes the time and frequency of received Global Navigation Satellite System (GNSS) signals relative to the synchronized network of positioning-unit devices. These time and frequency observations are modulated, as assistance data, onto the positioning signals that are broadcast by the positioning-unit devices. A position receiver demodulates the assistance data and analyzes the positioning signals. The position receiver then searches for Global Navigation Satellite System (GNSS) signals in a range responsive to the assistance data and the analysis of the received positioning signals.
摘要翻译： 公开了一种用于向由全球导航卫星系统（GNSS）和定位单元设备的同步网络组成的位置网络中的位置接收机提供帮助的系统和方法。 定位单元设备观察到相对于定位单元设备的同步网络接收到的全球导航卫星系统（GNSS）信号的时间和频率。 将这些时间和频率观测作为辅助数据调制到由定位单元设备广播的定位信号上。 位置接收机解调辅助数据并分析定位信号。 然后，位置接收器在响应于辅助数据和接收到的定位信号分析的范围内搜索全球导航卫星系统（GNSS）信号。
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公开(公告)号：US08009098B2
公开(公告)日：2011-08-30
申请号：US11547694
申请日：2005-04-07
申请人： James Lamance
发明人： James Lamance
IPC分类号： G01S3/16
CPC分类号： H04B1/7085 , G01S19/22 , H04B1/7117
摘要： The present invention discloses a system and method for mitigating multipath in DSSS CDMA radio navigation signals by a) transmitting a rapid pulsing pattern from a transmitting device to a position receiver that samples the transmitted signal, b) separating the received samples and storing sample-based correlation accumulation values into independent bins that are synchronous with the received pulsing pattern, c) applying a logical decision process to determine the accumulation bin associated with the leading edges of the received pulses, and d) generating a range estimate from the correlation accumulation bin associated with the leading edges of the received pulses.
摘要翻译： 本发明公开了一种减轻DSSS CDMA无线电导航信号中的多路径的系统和方法，该系统和方法包括以下步骤：a）将快速脉冲模式从发送设备发送到对发射信号进行采样的位置接收机; b）分离接收到的采样并存储基于采样 相关累积值转换成与所接收的脉冲模式同步的独立仓，c）应用逻辑判定过程来确定与接收到的脉冲的前沿相关联的累加仓，以及d）从相关累积仓相关联产生范围估计 接收脉冲的前沿。
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