公开(公告)号：ID29939A

公开(公告)日：2001-10-25

申请号：ID20011068

申请日：1999-10-12

Applicant: QUALCOMM INC

Inventor： SINDHUSHAYANA NAGABHUSHANA T ,  JEREMY STEIN ,  RAJUV VIJAYAN ,  FUYUN LING

IPC: H03M13/27 ,  H03M13/29 ,  H04L1/00 ,  G06F11/10

Abstract: The present invention is a novel and improved technique for performing coding with particular application to turbo, or iterative, coding techniques. In accordance with one embodiment of the invention, interleaving is performed by generating the address of a memory using a PN state generator. Data is written into a memory in sequential order, and then read out using addresses specified by the PN state generator. To deinterleave, the interleaved data is written into a memory using addresses specified by the PN state generator, and then read out in sequential order. A set of PN state generators that provide excellent coding performance is provided.

公开(公告)号：MY138823A

公开(公告)日：2009-07-31

申请号：MYPI20022194

申请日：2002-06-12

Applicant: QUALCOMM INC

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

IPC: G06F17/10 ,  G01S5/02 ,  G01S19/27 ,  H04W64/00

Abstract: A SYSTEM AND METHOD FOR ACCURATELY DETERMINING TIME OF ARRIVAL USING A MATHEMATICAL MODEL (122) 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 (122) USES THE MAXIMUM MEASURED CORRELATION VALUE AND CORRELATION VALUES AT ADJACENT SAMPLE POINTS TO DETERMINE COEFFICIENTS FOR THE SELECTED MATHEMATICAL MODEL (122). 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：HK1040011B

公开(公告)日：2005-09-02

申请号：HK02101499

申请日：2002-02-27

Applicant: QUALCOMM INC

Inventor： NAGGABHUSHANA SINDHUSHAYANA ,  JEREMY STEIN ,  RAJIV VIJAYAN ,  FUYUN LING

IPC: G06F11/10 ,  H03M13/27 ,  H03M20060101 ,  H03M13/29 ,  H04L1/00

公开(公告)号：HK1074671A1

公开(公告)日：2005-11-18

申请号：HK05106794

申请日：2005-08-08

Applicant: QUALCOMM INC

Inventor： ALKINOOS VAYANOS ,  PETER GAAL ,  JEREMY STEIN ,  PARAG AGASHE ,  IVAN FERNANDEZ-CORBATON ,  SAMIR SOLIMAN

IPC: G01S1/00 ,  G01S19/05 ,  G01S19/25 ,  H04B1/707

Abstract: A system and method for assisting an integrated GPS/wireless terminal unit in acquiring one or more GPS satellite signals from the GPS satellite constellation. The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the variables in geographic location and time delay relative to GPS time, the systems and methods of the present invention generate a narrow code-phase search range that enables the terminal unit to more quickly acquire and track the necessary GPS satellites, and thereby more quickly provide accurate position information to a requesting entity.

公开(公告)号：HK1071197A1

公开(公告)日：2005-07-08

申请号：HK05103818

申请日：2005-05-06

Applicant: QUALCOMM INC

Inventor： JEREMY STEIN

IPC: G01S5/06 ,  G01S5/02 ,  G01S19/03 ,  H04W64/00

Abstract: A method and apparatus of determining a lower bound of an excess delay in a time of arrival measurement of a received signal. Determining the lower bound of an excess delay in a time of arrival measurements includes receiving signals from at least two base stations and determining the time difference of arrival between the received signals from their respective base stations. Then estimating a lower bound of excess delay introduced into the signals received from the base stations based on the time of arrival of the signals from the respective base stations and a known distance between the base stations. The lower bound of excess delay may be used to adjust the estimate of a mobile unit's location based on the time of arrival measurements of the received signals.