公开(公告)号：WO2003039021A1

公开(公告)日：2003-05-08

申请号：PCT/US2002/035271

申请日：2002-11-01

Applicant: QUALCOMM INCORPORATED

Inventor： RICK, Roland, R. ,  AMERGA, Messay ,  STEIN, Jeremy, M. ,  FERNANDEZ-CORBATON, Ivan

IPC: H04B1/707

CPC classification number: G01S5/0215 ,  G01S5/0221 ,  G01S19/22 ,  H04B1/70755 ,  H04B1/7117

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.

Abstract translation: 描述了用于从信号估计一个或多个参数的参数估计器。 从信号导出相关函数，分析相关函数以确定是否存在一个或多个第一峰（312），如果是，则与第二峰的旁瓣（318）区分开 。 如果一个或多个第一峰（312）存在并且可与第二峰的旁瓣（318）区分开，则从一个或多个第一峰（s）估计一个或多个参数 ）。 如果一个或多个第一峰不存在，或者如果存在，则不能与第二峰的旁瓣区分开，则从第二峰估计一个或多个参数。 可以在用户台中使用参数估计器来估计诸如无线通信系统中的一个或多个基站或扇区导频信号的到达时间的参数。 该信息可以用于用于估计用户台的位置的整体高级前向链路三边测量过程。

公开(公告)号：WO2003052451A3

公开(公告)日：2003-06-26

申请号：PCT/US2002/040040

申请日：2002-12-12

Applicant: QUALCOMM INCORPORATED

Inventor： RICK, Roland, R. ,  STEIN, Jeremy ,  AMERGA, Messay ,  FERNANDEZ-CORBATON, Ivan ,  RISTIC, Borislav ,  BHATIA, Ashok

IPC: G01S5/14

Abstract: A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.

公开(公告)号：EP1454161A2

公开(公告)日：2004-09-08

申请号：EP02792387.9

申请日：2002-12-12

Applicant: QUALCOMM Incorporated

Inventor： RICK, Roland, R. ,  STEIN, Jeremy ,  AMERGA, Messay ,  FERNANDEZ-CORBATON, Ivan ,  RISTIC, Borislav ,  BHATIA, Ashok

IPC: G01S5/14

CPC classification number: H04W64/00 ,  G01S5/0257 ,  G01S19/48

Abstract: A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.

公开(公告)号：WO2006105298A1

公开(公告)日：2006-10-05

申请号：PCT/US2006/011650

申请日：2006-03-28

Applicant: QUALCOMM INCORPORATED ,  FERNANDEZ-CORBATON, Ivan ,  JALALI, Ahmad ,  OZAKI, Ernest, T. ,  SIMON, Harris, Smith ,  GREGORY, Sherman, A.

Inventor： FERNANDEZ-CORBATON, Ivan ,  JALALI, Ahmad ,  OZAKI, Ernest, T. ,  SIMON, Harris, Smith ,  GREGORY, Sherman, A.

IPC: H04Q7/36 ,  H04Q7/38 ,  H01Q25/00

CPC classification number: H01Q25/00

Abstract: At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each deσorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals (Sl (t) , S2 (t) ) such that their crosscorrelation, or autocorrelation 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, having 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 a first receiver (104) and is also transmitted to a second receiver (106) with a time delay.

Abstract translation: 至少一个特征提供了使用自适应或定向天线执行点对多点传输的方式，同时减少天线模式失真。 通常，不是将相同的波形发送到两个或更多个接收机，而是将信息承载信号变换成不同的去相关波形，并且将每个去相关的波形发送到不同的接收机。 在一个实现中，信息承载信号被变换成两个去相关信号（S1（t），S2（t）），使得其信息载运信号的互相关或自相关为零或非常小。 这种去相关可以通过向第一接收机（104）发送第一信号，同时向第二接收机（106）发送具有作为第一信号的频谱反转版本的射频频谱的第二信号。 在另一实现中，第一信号被发送到第一接收器（104），并且还以时间延迟发送到第二接收器（106）。

公开(公告)号：WO2003038467A2

公开(公告)日：2003-05-08

申请号：PCT/US2002/034805

申请日：2002-10-29

Applicant: QUALCOMM INCORPORATED

Inventor： STEIN, Jeremy, M. ,  FERNANDEZ-CORBATON, Ivan ,  RICK, Roland, R. ,  RISTIC, Borislav ,  BHATIA, Ashok ,  AMERGA, Messay

IPC: G01S

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

Abstract: A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate 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 (AFLT) process for estimating the location of the subscriber station.

Abstract translation: 描述了用于使用动态变化的积分时间从从信号导出的相关函数中估计一个或多个参数的参数估计器。 可以在用户台中使用参数估计器来估计无线通信系统中的一个或多个基站或扇区导频信号的到达时间。 该信息可以用于用于估计用户台的位置的总体高级前向链路三边测量（AFLT）过程。

公开(公告)号：WO2003052955A1

公开(公告)日：2003-06-26

申请号：PCT/US2002/018137

申请日：2002-06-06

Applicant: QUALCOMM INCORPORATED

Inventor： FERNANDEZ-CORBATON, Ivan ,  STEIN, Jeremy ,  RICK, Roland, R.

IPC: H04B1/707

CPC classification number: H04W64/00 ,  G01S5/02 ,  G01S5/0221

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.

Abstract translation: 使用模拟相关函数的数学模型来准确地确定到达时间的系统和方法。 以预定的周期性间隔对相关值进行采样，并且确定与特定时间点一致的最大相关值。 数学模型使用相邻采样点的最大测量相关值和相关值来确定所选数学模型的系数。 可以计算系数并用于确定可能落在采样点之间的实际峰值。 实际峰值用于准确确定信号的到达时间。 来自多个远程发射机的到达时间信号与传统的三角测量技术一起被使用以精确地确定无线单元的位置。

公开(公告)号：WO2003040746A3

公开(公告)日：2003-05-15

申请号：PCT/US2002/035273

申请日：2002-11-01

Applicant: QUALCOMM INCORPORATED

Inventor： RICK, Roland, R. ,  STEIN, Jeremy, M. ,  AMERGA, Messay ,  FERNANDEZ-CORBATON, Ivan

IPC: G01S1/04

Abstract: A method of producing a reliability metric for a parameter estimate derived from a signal using correlation analysis is described. The method begins by obtaining an indication of whether a non line of sight signal condition is present or likely. Responsive to one or both of these indications, the method derives a reliability metric for the parameter estimate. In one embodiment, the parameter estimate is an estimate of time of arrival (TOA) of the signal, and the reliability metric is root mean square error (RMSE) of the time of arrival estimate. This embodiment obtains an indication of whether a non line of sight signal condition is present or likely based on a measure of the strength of the correlation function at the peak thereof. The measure of the strength of the correlation function at the peak thereof may be energy per chip divided by total received power (E c /I 0 ) or may simply be the raw energy of the correlation function at the peak. The RMSE metric which is computed in this embodiment varies inversely with the peak strength of the correlation function.

公开(公告)号：WO2003040746A2

公开(公告)日：2003-05-15

申请号：PCT/US2002/035273

申请日：2002-11-01

Applicant: QUALCOMM INCORPORATED

Inventor： RICK, Roland, R. ,  STEIN, Jeremy, M. ,  AMERGA, Messay ,  FERNANDEZ-CORBATON, Ivan

IPC: G01S

CPC classification number: H04W64/00 ,  G01S5/0205 ,  G01S5/0215

Abstract: A method of producing a reliability metric for a parameter estimate derived from a signal using correlation analysis is described. The method begins by obtaining an indication of whether a non line of sight signal condition is present or likely. Responsive to one or both of these indications, the method derives a reliability metric for the parameter estimate. In one embodiment, the parameter estimate is an estimate of time of arrival (TOA) of the signal, and the reliability metric is root mean square error (RMSE) of the time of arrival estimate. This embodiment obtains an indication of whether a non line of sight signal condition is present or likely based on a measure of the strength of the correlation function at the peak thereof. The measure of the strength of the correlation function at the peak thereof may be energy per chip divided by total received power (E¿c?/I¿0?) or may simply be the raw energy of the correlation function at the peak. The RMSE metric which is computed in this embodiment varies inversely with the peak strength of the correlation function.

Abstract translation: 描述了使用相关性分析来生成从信号导出的参数估计的可靠性度量的方法。 该方法通过获得是否存在非视线信号条件的可能性的指示开始。 响应于这些指示中的一个或两个，该方法导出参数估计的可靠性度量。 在一个实施例中，参数估计是信号的到达时间TOA的估计，可靠性度量是到达时间估计的均方根误差RMSE。 该实施例基于在其峰值处的相关函数的强度的度量来获得是否存在非线视觉信号条件或可能的指示。 在其峰值处的相关函数的强度的度量可以是每个芯片的能量除以总接收功率E / 或者可以简单地是峰值处的相关函数的原始能量。 在本实施例中计算的RMSE度量与相关函数的峰值强度成反比变化。

公开(公告)号：WO2003021812A1

公开(公告)日：2003-03-13

申请号：PCT/US2002/023911

申请日：2002-07-25

Applicant: QUALCOMM INCORPORATED

Inventor： FERNANDEZ-CORBATON, Ivan ,  SMEE, John E. ,  JAYARAMAN, Srikant

IPC: H04B7/08

CPC classification number: H04B7/0854 ,  H04B7/0845 ,  H04L1/0618

Abstract: A communication receiver (400) minimizes a combined local and global mean square error for signal equalization. A base station (101) or a mobile station (102-104) may include a plurality of antennas (292) for receiving a plurality of signals transmitted from a common source. The plurality of signals carry a common stream of data symbols. A pre-processing block (299) processes the received signals to produce a plurality of processed received signals (298). A signal equalizer (401) minimizes a combined local and global MSE over the processed received signals (298) to produce a combined signal (499). A decoder decodes the combined signal (499) to retrieve the stream of data symbols. A processor is configured for combining a local MSE and a global MSE in accordance with an adjustable weighting factor a to produce the combined local and global MSE.

Abstract translation: 通信接收机（400）最小化用于信号均衡的组合的局部和全局均方误差。 基站（101）或移动台（102-104）可以包括用于接收从公共源发送的多个信号的多个天线（292）。 多个信号携带公共数据符号流。 预处理块（299）处理所接收的信号以产生多个经处理的接收信号（298）。 信号均衡器（401）使经过处理的接收信号（298）的组合本地和全局MSE最小化以产生组合信号（499）。 解码器解码组合信号（499）以检索数据符号流。 处理器被配置为根据可调整的加权因子α来组合本地MSE和全局MSE以产生组合的本地和全局MSE。

公开(公告)号：WO2003013178A1

公开(公告)日：2003-02-13

申请号：PCT/US2002/023917

申请日：2002-07-25

Applicant: QUALCOMM INCORPORATED

Inventor： FERNANDEZ-CORBATON, Ivan ,  LEVANON, Nadav

IPC: H04Q7/38

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

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.

Abstract translation: 本文给出了一种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与所发送的导频信号之一相对应的多个信号的移动台。 该移动站包括一个包含搜索器相关机制和至少一个手指相关机制的接收机。 移动站接收机检测接收到的信号的到达时间和能量水平，并且构建搜索器直方图和表示对应于接收到的信号的采样的到达时间分布的手指直方图。 移动台然后为每个估计的早期信号到达产生延迟指数，并将延迟指数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。