公开(公告)号：WO1998034124A1

公开(公告)日：1998-08-06

申请号：PCT/US1997023433

申请日：1997-12-19

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BIRCHLER, Mark, A. ,  JONES, Debra, A. ,  OROS, Nicholas, C.

IPC: G01S03/02

CPC classification number: H04W64/00 ,  G01C21/20 ,  G01S1/045 ,  G01S5/06

Abstract: Signals exchanged between a fixed infrastructure (110-116) and a mobile unit (160) give rise to M channel quality metrics. The channel quality metrics are mapped, via predetermined relationships (501-503), into M corresponding time of arrival variances, which in turn are used to derive M-1 time of arrival differential variances. A time of arrival differential weighting matrix including, in part, the time of arrival differential variances, is used to calculate a WLS solution, which solution is an estimate of a location of the mobile unit. This procedure may be implemented using an infrastructure-based location processor (130) operating in conjunction with the mobile unit, or may be performed by either the location processor or mobile unit alone.

Abstract translation: 在固定基础设施（110-116）和移动单元（160）之间交换的信号产生M个信道质量度量。 通过预定的关系（501-503）将信道质量度量映射到M个对应的到达时间变化中，这又用于导出M-1个到达时间差异方差。 包括部分到达时间差异方差的到达时间差分加权矩阵用于计算WLS解，该解是估计移动单元的位置。 该过程可以使用与移动单元一起操作的基于基础设施的位置处理器（130）来实现，或者可以由位置处理器或移动单元单独执行。

公开(公告)号：EP0895600A1

公开(公告)日：1999-02-10

申请号：EP97952533.0

申请日：1997-12-19

Applicant: MOTOROLA, INC.

Inventor： BIRCHLER, Mark, A. ,  JONES, Debra, A. ,  OROS, Nicholas, C.

IPC: G01S5 ,  G01C21 ,  G01S1 ,  G01S19 ,  H04B7 ,  H04W64

CPC classification number: H04W64/00 ,  G01C21/20 ,  G01S1/045 ,  G01S5/06

Abstract: Signals exchanged between a fixed infrastructure (110-116) and a mobile unit (160) give rise to M channel quality metrics. The channel quality metrics are mapped, via predetermined relationships (501-503), into M corresponding time of arrival variances, which in turn are used to derive M-1 time of arrival differential variances. A time of arrival differential weighting matrix including, in part, the time of arrival differential variances, is used to calculate a WLS solution, which solution is an estimate of a location of the mobile unit. This procedure may be implemented using an infrastructure-based location processor (130) operating in conjunction with the mobile unit, or may be performed by either the location processor or mobile unit alone.

公开(公告)号：EP1105980A1

公开(公告)日：2001-06-13

申请号：EP99939708.6

申请日：1999-08-06

Applicant: MOTOROLA, INC.

Inventor： JASPER, Steven, C. ,  BIRCHLER, Mark, A. ,  JONES, Debra, A. ,  OROS, Nicholas, C.

IPC: H04B7/216

CPC classification number: G01S5/0221 ,  G01S5/14 ,  G01S11/02 ,  G01S2205/007

Abstract: The figure shows a base site (104) generating a pseudo-random signal based on at least one system parameter known to both the base site (104) and a communication unit (112). The base site transmitter (106) then transmits the pseudo-random signal to the communication unit via an idle communication resource (102). Upon receiving the pseudo-random signal by the receiver (114) of the communication unit (112) determines at least one characteristic of the idle communication resource (102) using the pseudo-random signal.