公开(公告)号：JP2011182390A

公开(公告)日：2011-09-15

申请号：JP2011023973

申请日：2011-02-07

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： FERNANDEZ-CORBATON IVAN ,  JALALI AHMAD ,  OZAKI ERNEST T ,  SIMON HARRIS SMITH ,  GREGORY SHERMAN A

IPC: H04B7/10 ,  H04B7/06

CPC classification number: H01Q25/00

Abstract: PROBLEM TO BE SOLVED: To provide a way to perform point-to-multipoint transmission using an adaptive or directional antenna while reducing an antenna array pattern distortion.
SOLUTION: Generally, rather than transmitting a same waveform to two or more receivers, an information bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information bearing signal is transformed into two decorrelated signals S
1 (t), S
2 (t), such that their cross-correlation or auto-correlation of the information bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver 104, while sending a second signal with a radio frequency spectrum that is the spectrally inverted version of the first signal to a second receiver 106. In another implementation, a first signal is transmitted to the first receiver 104, and is also transmitted to the second receiver 106 with a time delay.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种使用自适应或定向天线执行点对多点传输的方法，同时减少天线阵列模式失真。 解决方案：通常，不是向两个或更多个接收器发送相同的波形，而是将信息承载信号转换成不同的去相关波形，并将每个去相关的波形传输到不同的接收机。 在一个实现中，信息承载信号被变换成两个去相关信号S SB S（t），S SB SB（t），使得它们的互相关或自相关 的信息轴承信号，为零或非常小。 这种去相关可以通过向第一接收机104发送第一信号，同时以具有第一信号的频谱反转版本的射频频谱向第二接收机106发送第二信号来实现。在另一实现中，第一信号是 发送到第一接收机104，并且也以时间延迟发送到第二接收机106。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010002419A

公开(公告)日：2010-01-07

申请号：JP2009161845

申请日：2009-07-08

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： STEIN JEREMY M ,  FERNANDEZ-CORBATON IVAN ,  RICK ROLAND R ,  RISTIC BORISLAV ,  BHATIA ASHOK ,  AMERGA MESSAY

IPC: G01S1/00 ,  G01S19/11 ,  H04B1/707 ,  H04W64/00

CPC classification number: G01S19/24 ,  G01S5/0215 ,  G01S5/0221 ,  G01S19/21 ,  G01S19/31 ,  G01S19/46

Abstract: PROBLEM TO BE SOLVED: To provide a parameter estimator for estimating ≥1 parameters related to a signal through a correlation analysis using a dynamically variable integration time. SOLUTION: The parameter estimator for estimating ≥1 parameters from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator is employed in a subscriber station to estimate the time of arrival of ≥1 base stations or sector pilot signals in a wireless communication system. This information is utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于通过使用动态可变积分时间的相关分析估计与信号相关的≥1个参数的参数估计器。

解决方案：描述了使用动态变量积分时间从信号导出的相关函数估计≥1个参数的参数估计器。 在用户站中采用参数估计器来估计无线通信系统中≥1个基站或扇区导频信号的到达时间。 该信息用于估计用户台位置的整体高级向前链路三向（AFLT）过程。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2008086044A

公开(公告)日：2008-04-10

申请号：JP2007303557

申请日：2007-11-22

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： FERNANDEZ-CORBATON IVAN ,  LEVANON NADAV

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04Q7/38

CPC classification number: H04B1/7115 ,  H04B1/7113 ,  H04B1/7117

Abstract: PROBLEM TO BE SOLVED: To accurately estimate the earliest arrival of CDMA forward and reverse link signals. SOLUTION: A system and method for estimating the earliest signal arrival in a wireless communication system, is presented herein. According to one embodiment of the invention, the system includes a base station that transmits a plurality of pilot signals and a mobile station configured to receive a plurality of signals, corresponding to one of the transmitted pilot signals. The mobile station includes a receiver, containing a searcher correlating mechanism and at least one finger correlating mechanism. The mobile station receiver detects the arrival times and the energy levels of the received signals and constructs a searcher histogram and a finger histogram, representing an arrival time distribution of samples corresponding to the received signals. The mobile station then generates a delay index for each of the estimated early signal arrivals and forwards the delay indices to the base station or a position determination entity, to select the minimum delay index corresponding to the earliest signal arrival. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：准确估计CDMA正向和反向链路信号的最早到达。 解决方案：一种用于估计无线通信系统中最早信号到达的系统和方法。 根据本发明的一个实施例，该系统包括发送多个导频信号的基站和被配置为接收对应于所发送的导频信号之一的多个信号的移动台。 移动站包括接收器，其包含搜索器相关机制和至少一个手指相关机构。 移动站接收机检测接收到的信号的到达时间和能级，并构建搜索器直方图和手指直方图，表示对应于接收到的信号的采样的到达时间分布。 移动台然后为每个估计的早期信号到达生成一个延迟指数，并将延迟索引转发给基站或位置确定实体，以选择对应于最早信号到达的最小延迟指数。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：AT287192T

公开(公告)日：2005-01-15

申请号：AT02748258

申请日：2002-07-25

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN ,  LEVANON NADAV

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04Q7/38 ,  H04B1/707 ,  G01S5/00

Abstract: A method for estimating the earliest signal arrival in a wireless communication system is presented. The system includes a base station that transmits a plurality of pilot signals and a mobile station configured to receive a plurality of signals corresponding to the pilot signals. The mobile station includes a receiver containing a searcher correlation mechanism and at least one finger correlation mechanism. The mobile station receiver detects the arrival times and energy levels of the received signals and constructs a searcher histogram and a finger histogram associated with each pilot signal. Each of the searcher and finger histograms represents an arrival time distribution of samples corresponding to the received signals. The mobile station receiver processes samples contained within each of the searcher histograms and the finger histograms to generate a plurality of estimated early signal arrivals. The earliest signal arrival is determined from the plurality of estimated early signal arrivals.

公开(公告)号：CA2455704A1

公开(公告)日：2003-02-13

申请号：CA2455704

申请日：2002-07-25

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN ,  LEVANON NADAV

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04Q7/38 ,  G01S5/00 ,  H04B1/707

Abstract: A system and method for estimating the earliest signal arrival in a wireless communication system, is presented herein. In accordance with an embodiment of the invention, the system includes a base station that transmits a plurality of pilot signals and a mobile station configured to receive a plurality of signals corresponding to one of the transmitted pilot signals. The mobile station includes a receiver containing a searcher correlating mechanism and at least one finger correlating mechanism. The mobile station receiver detects the arrival times and energy levels of the received signals and constructs a searcher histogram and a finger histogram representing an arrival time distribution of samples corresponding to the received signals. The mobile station then generates a delay index for each of the estimated early signal arrivals and forwards the delay indices to the base station or a position determination entity to select the minimum delay index corresponding to the earliest signal arrival.

公开(公告)号：CA2466160C

公开(公告)日：2012-01-10

申请号：CA2466160

申请日：2002-11-01

Applicant: QUALCOMM INC

Inventor： RICK ROLAND R ,  AMERGA MESSAY ,  STEIN JEREMY M ,  FERNANDEZ-CORBATON IVAN

IPC: H04B1/707 ,  G01S1/00 ,  G01S1/04 ,  G01S5/02 ,  G01S19/22 ,  G01S19/29 ,  G01S19/30 ,  H04B1/68 ,  H04B1/7075 ,  H04B1/7117 ,  H04B7/005 ,  H04Q7/34 ,  H04Q7/38

Abstract: A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) (312) are present, and, if so, distinguishable from the sidelobe(s) (318) of a second peak. If the one or more first peak(s) (312) are present and distinguishable from the sidelobe(s) (318) of the second peak, the one or more parameter(s) are estimated from the one or more first peak(s). If the one or more first peak(s) are not present, or, if present, are not distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the second peak. The parameter estimator may be employed in a subscriber station to estimate a parameter such as the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration process for estimating the location of the subscriber station.

公开(公告)号：AU2002305881B2

公开(公告)日：2008-07-17

申请号：AU2002305881

申请日：2002-06-06

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN ,  STEIN JEREMY ,  RICK ROLAND R

IPC: G01S5/02 ,  G01S19/27 ,  H04W64/00

Abstract: A system and method for accurately determining time of arrival using a mathematical model that mimics a correlation function. A correlation value is sampled at a predetermined periodic interval and a maximum correlation value, coinciding with a particular point in time, is determined. The mathematical model uses the maximum measured correlation value and correlation values at adjacent sample points to determine coefficients for the selected mathematical model. The coefficients may be calculated and used to determine the actual peak, which may fall in-between the sample points. The actual peak value is used to accurately determine the time of arrival of a signal. Time of arrival signals from a plurality of remote transmitters are used along with conventional triangulation techniques to accurately determine the location of the wireless unit.

公开(公告)号：AU2002305881A1

公开(公告)日：2003-06-30

申请号：AU2002305881

申请日：2002-06-06

Applicant: QUALCOMM INC

Inventor： STEIN JEREMY ,  RICK ROLAND R ,  FERNANDEZ-CORBATON IVAN

IPC: G01S5/02 ,  G01S19/27 ,  H04W64/00 ,  H04B1/707

Abstract: A system and method for accurately determining time of arrival using a mathematical model that mimics a correlation function. A correlation value is sampled at a predetermined periodic interval and a maximum correlation value, coinciding with a particular point in time, is determined. The mathematical model uses the maximum measured correlation value and correlation values at adjacent sample points to determine coefficients for the selected mathematical model. The coefficients may be calculated and used to determine the actual peak, which may fall in-between the sample points. The actual peak value is used to accurately determine the time of arrival of a signal. Time of arrival signals from a plurality of remote transmitters are used along with conventional triangulation techniques to accurately determine the location of the wireless unit.

公开(公告)号：CA2466160A1

公开(公告)日：2003-05-08

申请号：CA2466160

申请日：2002-11-01

Applicant: QUALCOMM INC

Inventor： STEIN JEREMY M ,  FERNANDEZ-CORBATON IVAN ,  RICK ROLAND R ,  AMERGA MESSAY

IPC: G01S1/00 ,  G01S5/02 ,  G01S19/29 ,  G01S19/30 ,  H04B1/7075 ,  H04B1/7117 ,  H04Q7/34 ,  H04Q7/38 ,  H04B1/707 ,  G01S5/14

Abstract: A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) (312 ) are present, and, if so, distinguishable from the sidelobe(s) (318) of a second peak. If the one or more first peak(s) (312) are present and distinguishable from the sidelobe(s) (318) of the second peak, the one or mo re parameter(s) are estimated from the one or more first peak(s). If the one or more first peak(s) are not present, or, if present, are not distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the second peak. The parameter estimator may be employed in a subscriber station to estimate a parameter such as the time of arrival of on e or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration process for estimating the location of the subscriber station.

公开(公告)号：AT514957T

公开(公告)日：2011-07-15

申请号：AT02792387

申请日：2002-12-12

Applicant: QUALCOMM INC

Inventor： RICK ROLAND ,  STEIN JEREMY ,  AMERGA MESSAY ,  FERNANDEZ-CORBATON IVAN ,  RISTIC BORISLAV ,  BHATIA ASHOK

IPC: G01S5/02 ,  G01S19/17 ,  G01S19/34 ,  G01S19/35 ,  G01S19/48 ,  H04W64/00