公开(公告)号：JP2010016840A

公开(公告)日：2010-01-21

申请号：JP2009183184

申请日：2009-08-06

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

Inventor： SENDONARIS ANDREW

IPC: H04B1/16 ,  H04B1/707 ,  H04L1/00 ,  H04L27/00

CPC classification number: H04L27/0014 ,  H04L2027/0065

Abstract: PROBLEM TO BE SOLVED: To adjust a received signal by monitoring a frequency of the signal.
SOLUTION: 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.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：通过监视信号的频率来调整接收信号。 解决方案：本发明涉及使用包括导频符号和非导频符号的控制符号的频率跟踪技术。 例如，导频和非导频符号都可以用于估计接收信号的频率误差。 可以根据与每个非导频符号相关联的置信水平来加权非导频符号对估计的贡献。 在某些情况下，为非导频符号生成软判决，然后与导频符号一起用于频率跟踪。 以这种方式，可以改善频率跟踪环路。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009278626A

公开(公告)日：2009-11-26

申请号：JP2009121991

申请日：2009-05-20

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

Inventor： SENDONARIS ANDREW

IPC: H04W56/00 ,  H04B7/26 ,  H04W92/10

CPC classification number: H04W56/0035 ,  H04W56/0055 ,  H04W92/10

Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for adjusting a communication receiver based on the velocity of a wireless communication device in relation to a base station. SOLUTION: A receiver is adjusted by estimating a frequency shift of a communication signal transmitted between a base station and a wireless communication device (WCD) based on the WCD velocity. Using this estimate, adjustments are made to the communication receiver to account for the frequency shift of the communication signal. Adjustments to the receiver can include adjusting frequency and time tracking loops to account for the change in frequency of a signal received by, and from, the WCD as it moves relative to the base station. The receiver may be located in the WCD, or in the network infrastructure, or in both. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种基于无线通信设备相对于基站的速度来调整通信接收机的方法和装置。 解决方案：通过基于WCD速度估计在基站和无线通信设备（WCD）之间传输的通信信号的频移来调整接收机。 使用该估计，对通信接收机进行调整以考虑通信信号的频移。 对接收机的调整可以包括调整频率和时间跟踪环路以解决当WCD相对于基站移动时由WCD接收的信号的频率的变化。 接收机可以位于WCD中，或者位于网络基础设施中，或两者中。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2008228328A

公开(公告)日：2008-09-25

申请号：JP2008101681

申请日：2008-04-09

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

Inventor： SENDONARIS ANDREW

CPC classification number: H04B1/7117 ,  H04B2001/70706

Abstract: PROBLEM TO BE SOLVED: To provide a process and apparatus for timing which occurs in a timing discriminator that is part of a time tracking loop. SOLUTION: A timing discrimination prevents a rake finger from merging. The process for the timing discriminator is coupled to an input signal. The process starts by gathering early, ontime, and late samples of the input signal. The early, ontime, and late parameters are 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 the rake fingers to freely track their paths. This improves the receiver performance. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供在作为时间跟踪环路的一部分的定时鉴别器中发生的定时的处理和装置。 解决方案：定时识别防止耙指合并。 定时鉴别器的处理被耦合到输入信号。 该过程开始于收集输入信号的早期，准时和晚期样本。 早期，即时和晚期参数是根据样品得出的。 响应于早期，即时和晚期参数之间的预定关系产生定时鉴别器输出。 该过程和装置使得耙指能够自由地跟踪其路径。 这提高了接收机性能。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：DE60324434D1

公开(公告)日：2008-12-11

申请号：DE60324434

申请日：2003-08-29

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  SHIU DA-SHAN ,  PATTERSON DAVID M ,  SUBRAHMANYA PARVATHANATHAN ,  TERASAWA DAISUKE

IPC: H04J13/00 ,  H04Q7/38

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：DE60218476D1

公开(公告)日：2007-04-12

申请号：DE60218476

申请日：2002-07-16

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW

IPC: H04B1/707 ,  H04L27/227 ,  H04L27/00

Abstract: A cross product is determined for a received signal. A dot product is also determined for the received signal. If the cross product is greater than a predetermined threshold, the cross product is decremented by the product of the dot product multiplied by a constant value. If the cross product is less than or equal to the predetermined threshold, the cross product is incremented by the product of the dot product multiplied by the constant value. The incrementing or decrementing is continued until the frequency error approaches a minimum value.

公开(公告)号：HK1070207A1

公开(公告)日：2005-06-10

申请号：HK05102660

申请日：2005-03-30

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW

IPC: H04B1/707 ,  H04L20090101 ,  H04L27/00

Abstract: A cross product is determined for a received signal. A dot product is also determined for the received signal. If the cross product is greater than a predetermined threshold, the cross product is decremented by the product of the dot product multiplied by a constant value. If the cross product is less than or equal to the predetermined threshold, the cross product is incremented by the product of the dot product multiplied by the constant value. The incrementing or decrementing is continued until the frequency error approaches a minimum value.

公开(公告)号：AU2003277401A8

公开(公告)日：2004-05-04

申请号：AU2003277401

申请日：2003-10-14

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  MADAPUSHI THEJASWI BHARADWAJ

IPC: H04L12/56 ,  H04L1/00 ,  H04L12/28

Abstract: A method is provided for partitioning data into packets, where each packet has a type k selected from a set of packet types, and a length L k , in bytes, of payload data. The method includes steps of: determining an expected successful transmit time E k , for packets of type k, for each of the set of packet types; choosing an optimum packet type for which the value E k /L k is a minimum; and partitioning the payload data into packets of the optimum packet type. The method is enhanced by computing a bit error rate (BER) from the retransmission rate for single packet type and using the BER to compute retransmission rates for packets of the remaining types. The method is further enhanced by computing transition tables in advance and using the transition tables to select an optimum packet type.

公开(公告)号：CA2465737A1

公开(公告)日：2003-05-15

申请号：CA2465737

申请日：2002-11-07

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW

IPC: H04B1/707 ,  H04L1/00 ,  H04L27/00

Abstract: In one embodiment, the invention is directed toward frequency tracking techniques using both the pilot and non-pilot symbols. The contribution of n on- pilot symbols to the estimation can be weighted according to a confidence level. In some cases, soft decisions are generated for the non-pilot symbols and then used with the pilot symbols for frequency tracking.

公开(公告)号：AT527793T

公开(公告)日：2011-10-15

申请号：AT10163075

申请日：2004-10-14

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  SHIU DA-SHAN ,  FARMER DOMINIC GERARD ,  LIN JEREMY H ,  SUBRAHMANYA PARVATHANATHAN ,  ROWLAND THOMAS K

IPC: G01S19/25 ,  H04L27/00 ,  G01S19/23 ,  H04B1/38

Abstract: Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency error in the information signal; and periodically tune the reference signal to reduce the frequency error. To prevent GPS performance degradation during LO tuning, a tuning indicator signal may be generated and provided to the GPS receiver to disable GPS operation.

公开(公告)号：DE60219353T2

公开(公告)日：2007-12-13

申请号：DE60219353

申请日：2002-11-08

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW

IPC: H04B7/005 ,  H04B1/7115 ,  H04B7/26 ,  H04W52/24

Abstract: When all of the fingers of a wireless rake receiver are "out-of-lock," the transmit power is initially maintained at a constant level. When the "out-of-lock" condition persists for an extended period of time, transmit power is increased in an effort to reacquire a lock with a subscriber unit or base station, as the case may be. An increase in transmit power may be effective in reacquiring lock when the cause of the out-of-lock condition is slow fading, rather than fast fading. Slow fading may be evidenced by persistence of the out-of-lock condition for an extended period of time. The length of the out-of-lock condition is used to selectively control transmit power and thereby promote quality of service. Transmit power is only increased when the fingers remain out-of-lock for an extended period of time, thereby avoiding undue increases in transmit power that could produce interference among different subscriber units.