公开(公告)号：EP1457011A2

公开(公告)日：2004-09-15

申请号：EP02780594.4

申请日：2002-11-07

Applicant: QUALCOMM Incorporated

Inventor： SENDONARIS, Andrew

IPC: H04L27/00

CPC classification number: H04L27/0014 ,  H04L2027/0065

Abstract: In one embodiment, the invention is directed toward frequency tracking techniques using control symbols that include both pilot and non-pilot symbols. For example, both the pilot and non-pilot symbols can be used in estimating frequency error of a received signal. The contribution of non-pilot symbols to the estimation can be weighted according to a confidence level associated with each non-pilot symbol. In some cases, soft decisions are generated for the non-pilot symbols and then used with the pilot symbols for frequency tracking. In this manner, the frequency tracking loop can be improved.

公开(公告)号：EP1368906A1

公开(公告)日：2003-12-10

申请号：EP02725109.9

申请日：2002-03-08

Applicant: QUALCOMM INCORPORATED

Inventor： SENDONARIS, Andrew

IPC: H04B1/707

CPC classification number: H04B1/7117 ,  H04B2001/70706

Abstract: A process and apparatus for timing occurs in a timing discriminator that is part of a time tracking loop. The timing discrimination that prevents Rake finger merging. The process for timing discrimination discriminator is coupled to an input signal. The process begins by gathering early, ontime, and late samples of the input signal. Early, Ontime, and Late parameters are then derived in response to the samples. The timing discriminator output is generated in response to a predetermined relationship between the Early, Ontime, and Late parameters. The process and apparatus enables Rake fingers to freely track their paths. This improves the receiver performance.

公开(公告)号：EP1535398B1

公开(公告)日：2008-10-29

申请号：EP03791974.3

申请日：2003-08-29

Applicant: QUALCOMM INCORPORATED

Inventor： SENDONARIS, Andrew ,  SHIU, Da-shan ,  PATTERSON, David M. ,  SUBRAHMANYA, Parvathanathan ,  TERASAWA, Daisuke

IPC: H04B1/707

CPC classification number: H04B1/70754

公开(公告)号：EP1535398A2

公开(公告)日：2005-06-01

申请号：EP03791974.3

申请日：2003-08-29

Applicant: QUALCOMM Incorporated

Inventor： SENDONARIS, Andrew ,  SHIU, Da-shan ,  PATTERSON, David M. ,  SUBRAHMANYA, Parvathanathan ,  TERASAWA, Daisuke

IPC: H04B1/00

CPC classification number: H04B1/70754

Abstract: A method and apparatus for using information about a mobile terminal's location relative to a base station can improve performance of a communication system. In addition, information about the mobile terminal's velocity relative to the base station may be used to improve performance of the communication system. The location information may be used to estimate a nominal PN offset, and a set of PN offset to use, for processing communication signals. The velocity information may be used to estimate a nominal frequency of the communication signals.

公开(公告)号：EP1520353A2

公开(公告)日：2005-04-06

申请号：EP03742292.0

申请日：2003-06-26

Applicant: Qualcomm Incorporated

Inventor： SENDONARIS, Andrew

IPC: H04B7/005

CPC classification number: H04W52/283 ,  H04W52/223 ,  H04W52/282 ,  H04W52/60

Abstract: A method and apparatus are provided for determining adjustments to be made to a transmitter based on the velocity or location of a wireless communication device in relation to a wireless network infrastructure. The transmitter to be adjusted can be located in either the wireless communication device, or in a device in the wireless communication infrastructure, or both.

公开(公告)号：EP1456969A1

公开(公告)日：2004-09-15

申请号：EP02792235.0

申请日：2002-11-07

Applicant: Qualcomm Incorporated

Inventor： SENDONARIS, Andrew

IPC: H04B7/005

CPC classification number: H04W52/228 ,  H04B2201/70701 ,  H04W52/08 ,  H04W52/226

Abstract: The invention is directed toward methods for estimating the power of a received signal encoded with both pilot and non-pilot symbols. The method may include separately accumulating the pilot symbols and the non-pilot symbols and then estimating signal power by calculating a weighted sum of the accumulated pilot and non-pilot symbols. In this manner, a more accurate estimate of the power of the received signal can be obtained.

公开(公告)号：EP1425892A2

公开(公告)日：2004-06-09

申请号：EP02768780.5

申请日：2002-08-29

Applicant: Qualcomm, Incorporated

Inventor： SUBRAHMANYA, Parvathanathan ,  SENDONARIS, Andrew

IPC: H04L27/00 ,  H04B1/707

CPC classification number: H04L27/2332 ,  H04B2201/70701 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0081 ,  H04L2027/0087

Abstract: Techniques to acquire and track a received signal based on one or more transmitted pilots. In an aspect, a frequency tracking loop is provided and supports a number of loop modes (e.g., acquisition and tracking modes). Each loop mode may be associated with a respective frequency detector and a set of values for a set of elements in the loop. In another aspect, several frequency detectors are provided for deriving estimates of the frequency error in the downconversion (e.g., from radio frequency to baseband). In one design, maximum likelihood estimates of the frequency error are derived based on the recovered pilot symbols. In another design, the frequency error estimates for the multipath are derived based on the frequency error estimated for each transmitted signal.

Abstract translation: 基于一个或多个发射的导频获取和跟踪接收到的信号实例（或多路径）的技术。 在一方面，提供频率跟踪环以获取和跟踪多路径，并且支持多种环路模式（例如，采集和跟踪模式）。 每个循环模式可以与相应的频率检测器和一组循环中的元件的值相关联。 在另一方面，提供了几个频率检测器用于导出多径下变频（例如，从射频到基带）中的频率误差的估计。 在一种设计中，基于恢复的导频符号导出频率误差的最大似然估计。 在另一种设计中，基于针对每个发射信号估计的频率误差导出多路径的频率误差估计。