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公开(公告)号：US10091754B2
公开(公告)日：2018-10-02
申请号：US14719252
申请日：2015-05-21
Applicant: Apple Inc.
Inventor： Isaac Thomas Miller , Jonathan Schoenberg
Abstract: Systems, methods, and computer program products for determining a location from non-line-of-sight (NLOS) signals are described. A processor can determine that multipath interferences of a signal reaching a receiver through different paths that are close in lengths may be mistakenly interpreted as additional time shift, (e.g., additional time delay or, in some cases, time advance) of the signal in calculating a timing of the signal. The processor can determine the possible differences between path lengths and then determine an amount of the additional time shift. The processor can determine a shift correction to remove effects caused by the additional time delay from the timing calculation.
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公开(公告)号：US20150341886A1
公开(公告)日：2015-11-26
申请号：US14719252
申请日：2015-05-21
Applicant: Apple Inc.
Inventor： Isaac Thomas Miller , Jonathan Schoenberg
CPC classification number: H04W56/0095 , G01S5/0273 , G01S19/06 , G01S19/428 , H04B7/18513 , H04W4/025 , H04W56/003
Abstract: Systems, methods, and computer program products for determining a location from non-line-of-sight (NLOS) signals are described. A processor can determine that multipath interferences of a signal reaching a receiver through different paths that are close in lengths may be mistakenly interpreted as additional time shift, (e.g., additional time delay or, in some cases, time advance) of the signal in calculating a timing of the signal. The processor can determine the possible differences between path lengths and then determine an amount of the additional time shift. The processor can determine a shift correction to remove effects caused by the additional time delay from the timing calculation.
Abstract translation: 描述了用于从非视距（NLOS）信号确定位置的系统，方法和计算机程序产品。 处理器可以确定通过长度接近的不同路径到达接收机的信号的多径干扰可能被错误地解释为在计算中的信号的附加时间偏移（例如，额外的时间延迟或在某些情况下，时间提前） 信号的定时。 处理器可以确定路径长度之间的可能差异，然后确定附加时移的量。 处理器可以确定移位校正以消除由时间计算引起的附加时间延迟引起的影响。
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公开(公告)号：US20150338522A1
公开(公告)日：2015-11-26
申请号：US14719237
申请日：2015-05-21
Applicant: Apple Inc.
Inventor： Isaac Thomas Miller , Jonathan Schoenberg
CPC classification number: G01S19/35 , G01S19/22 , G01S19/428
Abstract: Systems, methods, and computer program products for determining a location from non-line-of-sight (NLOS) signals are described. An RF receiver can receive signals of an RF transmitter (e.g., a GNSS satellite) reflected by one or more building surfaces. A processor embedded in or coupled to the RF receiver can reduce the effects of multipath interference caused by the reflections using data on reflective characteristics of buildings located close to the RF receiver. The data can include information on which surfaces of the buildings are visible to the RF receiver. The processor can then estimate, from the visible surfaces and known satellite locations, feasible signal paths for a signal from a satellite to the RF receiver. The processor can then correct a location estimation by taking into account the multipath effects of the signal traveling along the feasible signal paths.
Abstract translation: 描述了用于从非视距（NLOS）信号确定位置的系统，方法和计算机程序产品。 RF接收机可以接收由一个或多个建筑物表面反射的RF发射器（例如，GNSS卫星）的信号。 嵌入或耦合到RF接收机的处理器可以减少使用数据对靠近RF接收机的建筑物的反射特性的反射引起的多径干扰的影响。 数据可以包括关于RF接收器对建筑物的哪个表面可见的信息。 然后，处理器可以从可见表面和已知的卫星位置估计用于从卫星到RF接收机的信号的可行信号路径。 然后，处理器可以通过考虑沿着可行信号路径行进的信号的多路径效应来校正位置估计。
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