公开(公告)号：HK1079913A1

公开(公告)日：2006-04-13

申请号：HK05111865

申请日：2005-12-22

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SHIU DA-SHAN

IPC: H04B20090101 ,  H04B7/005 ,  H04B7/26

Abstract: In a wireless communication system (10) having a composite transport channel made up of individual transport channels, a method for closed loop power control wherein multiple instances of the outer loop are performed in parallel. The method determines a Signal-to-Interference Ratio (SIR) threshold for the composite channel based on a channel quality metric evaluated for each of the individual channels. In one embodiment the channel quality metric is a Cyclical Redundancy Check (CRC) outcome.

公开(公告)号：BR0315822A

公开(公告)日：2005-09-13

申请号：BR0315822

申请日：2003-10-31

Applicant: QUALCOMM INC

Inventor： SHIU DA-SHAN ,  ZHANG LI ,  SY EUGENE ,  MALDONADO DAVID ,  DHALIWAL UPKAR

IPC: H03G3/30 ,  H04B1/40 ,  H04B1/30 ,  H03D3/00

Abstract: Techniques for improved low latency frequency switching are disclosed. In one embodiment, a controller receives a frequency switch command and generates a frequency switch signal at a time determined in accordance with a system timer. In another embodiment, gain calibration is initiated subsequent to the frequency switch signal delayed by the expected frequency synthesizer settling time. In yet another embodiment, DC cancellation control and gain control are iterated to perform gain calibration, with signaling to control the iterations without need for processor intervention. Various other embodiments are also presented. Aspects of the embodiments disclosed may yield the benefit of reducing latency during frequency switching, allowing for increased measurements at alternate frequencies, reduced time spent on alternate frequencies, and the capacity and throughput improvements that follow from minimization of disruption of an active communication session and improved neighbor selection.

公开(公告)号：HK1061314A1

公开(公告)日：2004-09-10

申请号：HK04104258

申请日：2004-06-14

Applicant: QUALCOMM INC

Inventor： SHIU DA-SHAN ,  AGRAWAL AVNEESH

IPC: H04B1/707

Abstract: A buffer structure for storing symbols received via a number of (e.g., physical or transport) channels. Each channel is associated with a particular time interval (e.g., a radio frame period or a transmission time interval (TTI)) over which the received symbols are processed (e.g., interleaved). The buffer structure includes a buffer and an address generator. The buffer is partitioned into a number of sections. One section is assigned to each channel being processed. Each section can be operated as a circular buffer. The address generator provides addresses for writing symbols to the assigned sections. If the buffer structure is used for the transport channels, the sections can be assigned to the transport channels based on the associated TTIs (e.g., in descending order of TTIs). For each coded composite transport channel (CCTrCH), the transport channels in the CCTrCH can be assigned to sections defined starting from a respective initial location (e.g., the top or bottom of the buffer) and continuing along a respective direction of the buffer (e.g., downward or upward).

公开(公告)号：AU2003285122A8

公开(公告)日：2004-05-25

申请号：AU2003285122

申请日：2003-10-31

Applicant: QUALCOMM INC

Inventor： MALDONADO DAVID ,  SHIU DA-SHAN ,  DHALIWAL UPKAR ,  SY EUGENE ,  ZHANG LI

IPC: H03G3/30 ,  H04B1/40 ,  H03D3/00 ,  H04B1/30

Abstract: Techniques for improved low latency frequency switching are disclosed. In one embodiment, a controller receives a frequency switch command and generates a frequency switch signal at a time determined in accordance with a system timer. In another embodiment, gain calibration is initiated subsequent to the frequency switch signal delayed by the expected frequency synthesizer settling time. In yet another embodiment, DC cancellation control and gain control are iterated to perform gain calibration, with signaling to control the iterations without need for processor intervention. Various other embodiments are also presented. Aspects of the embodiments disclosed may yield the benefit of reducing latency during frequency switching, allowing for increased measurements at alternate frequencies, reduced time spent on alternate frequencies, and the capacity and throughput improvements that follow from minimization of disruption of an active communication session and improved neighbor selection.

公开(公告)号：CA2477591A1

公开(公告)日：2003-09-04

申请号：CA2477591

申请日：2003-02-27

Applicant: QUALCOMM INC

Inventor： SHIU DA-SHAN ,  LIN JEREMY ,  TEAGUE EDWARD HARRISON ,  AMERGA MESSAY

IPC: H04B1/00 ,  H04B1/707

Abstract: Techniques for tracking closely spaced multipath and preventing finger merge without monitoring relative positions between each of a plurality of fingers are disclosed. In one aspect, motion limits are determined for each finger. Time-tracking commands that would move the position of a finger outside its respective motion limits are suppressed. In another aspect, motion limits ar e updated dynamically, the motion limits of each finger determined in accordan ce with the motion limits of fingers adjacent to it. Various other aspects are also presented. These aspects have the benefit of preventing finger merge, which allows the allocation of multiple fingers to closely spaced multipath, thus increasing performance and system capacity, and mitigating misallocatio n of system resources.

公开(公告)号：NO20032264L

公开(公告)日：2003-07-03

申请号：NO20032264

申请日：2003-05-20

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SHIU DA-SHAN

IPC: H04B7/005 ,  H04B7/26

Abstract: In a wireless communication system (10) having a composite transport channel made up of individual transport channels, a method for closed loop power control wherein multiple instances of the outer loop are performed in parallel. The method determines a Signal-to-Interference Ratio (SIR) threshold for the composite channel based on a channel quality metric evaluated for each of the individual channels. In one embodiment the channel quality metric is a Cyclical Redundancy Check (CRC) outcome.

公开(公告)号：CA2429622A1

公开(公告)日：2002-05-30

申请号：CA2429622

申请日：2001-11-14

Applicant: QUALCOMM INC

Inventor： SHIU DA-SHAN ,  AGRAWAL AVNEESH

IPC: H04B7/005 ,  H04B7/26

Abstract: In a wireless communication system (10) having a composite transport channel made up of individual transport channels, a method for closed loop power control wherein multiple instances of the outer loop are performed in parallel. The method determines a Signal-to-Interference Ratio (SIR) threshold for the composite channel based on a channel quality metric evaluated for each of the individual channels. In one embodiment the channel quality metric is a Cyclical Redundancy Check (CRC) outcome.

公开(公告)号：CA2424257A1

公开(公告)日：2002-04-11

申请号：CA2424257

申请日：2001-10-02

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SHIU DA-SHAN

IPC: H04B1/707

Abstract: A buffer structure for storing symbols received via a number of (e.g., physical or transport) channels. Each channel is associated with a particula r time interval (e.g., a radio frame period or a transmission time interval (TTI)) over which the received symbols are processed (e.g., interleaved). Th e buffer structure includes a buffer and an address generator. The buffer is partitioned into a number of sections. One section is assigned to each chann el being processed. Each section can be operated as a circular buffer. The address generator provides addresses for writing symbols to the assigned sections. If the buffer structure is used for the transport channels, the sections can be assigned to the transport channels based on the associated TTIs (e.g., in descending order of TTIs). For each coded composite transport channel (CCTrCH), the transport channels in the CCTrCH can be assigned to sections defined starting from a respective initial location (e.g., the top or bottom of the buffer) and continuing along a respective direction of the buffer (e.g., downward or upward).

公开(公告)号：ES2359213T3

公开(公告)日：2011-05-19

申请号：ES08008242

申请日：2004-10-14

Applicant: QUALCOMM INC

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

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

Abstract: Un dispositivo de comunicaciones que comprende: un oscilador sintonizable (108) configurado para producir una primera señal de referencia (108b); un receptor (106) configurado para recuperar una señal de información de una portadora utilizando la primera señal de referencia; un procesador (116) configurado para detectar un error de frecuencia en la señal de información y sintonizar periódicamente el oscilador para reducir el error de frecuencia; donde el oscilador sintonizable está configurado adicionalmente para producir una segunda señal de referencia (108a); y el dispositivo de comunicaciones comprende adicionalmente un segundo receptor (102) configurado para recuperar una segunda señal de información de una segunda portadora utilizando la segunda señal de referencia; donde el procesador está configurado adicionalmente para inhabilitar el segundo receptor durante la sintonización del oscilador.

公开(公告)号：AT463084T

公开(公告)日：2010-04-15

申请号：AT03768690

申请日：2003-11-05

Applicant: QUALCOMM INC

Inventor： SHIU DA-SHAN ,  MALLADI DURGA P ,  BHASHYAM SRIKRISHNA

IPC: H04B1/10 ,  H04L1/20 ,  H04L25/02 ,  H04L25/03

Abstract: A channel estimation method comprises determining that every longest-spreading-factor code having a common parent code with an all-ones pilot code is unoccupied. Channel estimation is performed using the common parent code during two or more time periods within a time period of the all-ones pilot code.