-
公开(公告)号：DE60031895D1
公开(公告)日：2006-12-28
申请号：DE60031895
申请日：2000-04-11
Applicant: QUALCOMM INC
Inventor： HAMDY WALID , MATHE LENNART , SUTTON TODD
IPC: H04B1/7097 , H04B1/707 , H04B1/71 , H04Q7/34
Abstract: A method for detecting in-band interfering signals, in a wireless communication base station, the method comprising: performing downconversion and bandpass-filtering of a received analog signal to produce a downconverted bandpass-filtered analog signal which resides approximately within a predetermined reverse-link frequency band; performing automatic gain control (204) of said downconverted bandpass-filtered analog signal to produce a first gain-controlled signal whose RMS amplitude is approximately equal to a predetermined value; performing analog-to-digital conversion (208) of said first gain-controlled signal to create a stream of digital samples; performing analysis (212) of said stream of digital samples to create a first set of sub-band power measurements corresponding to the received power associated with adjacent frequency sub-bands, each sub-band representing a fraction of a predetermined spectrum analysis band, said spectrum analysis band including frequency components outside of said reverse-link frequency band; and performing spectrum evaluation (216), comprising: identifying a group of one or more adjacent sub-band power measurements which exceed a predetermined threshold; and identifying any group of one or more sub-band power measurements which is inside the reverse-link frequency band, and are less than a predetermined minimum or threshold.
-
公开(公告)号：AT345599T
公开(公告)日：2006-12-15
申请号：AT03009461
申请日：2000-04-11
Applicant: QUALCOMM INC
Inventor： HAMDY WALID , MATHE LENNART , SUTTON TODD
IPC: H04B1/7097 , H04B1/707 , H04B1/71 , H04Q7/34
Abstract: A method for detecting in-band interfering signals, in a wireless communication base station, the method comprising: performing downconversion and bandpass-filtering of a received analog signal to produce a downconverted bandpass-filtered analog signal which resides approximately within a predetermined reverse-link frequency band; performing automatic gain control (204) of said downconverted bandpass-filtered analog signal to produce a first gain-controlled signal whose RMS amplitude is approximately equal to a predetermined value; performing analog-to-digital conversion (208) of said first gain-controlled signal to create a stream of digital samples; performing analysis (212) of said stream of digital samples to create a first set of sub-band power measurements corresponding to the received power associated with adjacent frequency sub-bands, each sub-band representing a fraction of a predetermined spectrum analysis band, said spectrum analysis band including frequency components outside of said reverse-link frequency band; and performing spectrum evaluation (216), comprising: identifying a group of one or more adjacent sub-band power measurements which exceed a predetermined threshold; and identifying any group of one or more sub-band power measurements which is inside the reverse-link frequency band, and are less than a predetermined minimum or threshold.
-
公开(公告)号：DE69526963D1
公开(公告)日：2002-07-11
申请号：DE69526963
申请日：1995-11-22
Applicant: QUALCOMM INC
Inventor： PADOVANI ROBERTO , HAMDY WALID , BAR-DAVID GIL
Abstract: An improved method and system for performing a pilot signal searching operation in anticipation of handoff in mobile station communication between base stations is disclosed herein. The searching operation is described herein as being implemented within a cellular communication system which uses code division multiple access (CDMA) modulation techniques. The mobile station maintains a list of an Active Set of pilot signals transmitted from base stations with which the mobile station is to communicate through, and a Neighbor Set of pilots from base stations within a predetermined proximity of the mobile station. In addition to the Neighbor and Active Sets of pilots, the mobile station maintains a list of Candidate and Pre-Candidate Sets of pilots. Based on analysis of the signal strength of the pilot signals received at the mobile station, base station entries from the Neighbor Set may be assigned to the Pre-Candidate and Candidate Sets, and eventually to the Active set. The searching operation contemplates comparing pilot signal strength measurements corresponding to each base station entry within the Neighbor Set to a first predetermined level. One or more entries from the Neighbor Set having a base station signal strength measurement greater than the first predetermined level may be placed in the Pre-Candidate Set. The strength of the pilot signals associated with entries in the Pre-Candidate Set are then further evaluated to determine eligibility within the Candidate Set, from which are selected the entries comprising the Active Set.
-
公开(公告)号：AU692669B2
公开(公告)日：1998-06-11
申请号：AU4594596
申请日：1995-11-22
Applicant: QUALCOMM INC
Inventor： PADOVANI ROBERTO , HAMDY WALID , BAR-DAVID GIL
Abstract: An improved method and system for performing a pilot signal searching operation in anticipation of handoff in mobile station communication between base stations is disclosed herein. The searching operation is described herein as being implemented within a cellular communication system which uses code division multiple access (CDMA) modulation techniques. The mobile station maintains a list of an Active Set of pilot signals transmitted from base stations with which the mobile station is to communicate through, and a Neighbor Set of pilots from base stations within a predetermined proximity of the mobile station. In addition to the Neighbor and Active Sets of pilots, the mobile station maintains a list of Candidate and Pre-Candidate Sets of pilots. Based on analysis of the signal strength of the pilot signals received at the mobile station, base station entries from the Neighbor Set may be assigned to the Pre-Candidate and Candidate Sets, and eventually to the Active set. The searching operation contemplates comparing pilot signal strength measurements corresponding to each base station entry within the Neighbor Set to a first predetermined level. One or more entries from the Neighbor Set having a base station signal strength measurement greater than the first predetermined level may be placed in the Pre-Candidate Set. The strength of the pilot signals associated with entries in the Pre-Candidate Set are then further evaluated to determine eligibility within the Candidate Set, from which are selected the entries comprising the Active Set.
-
公开(公告)号：NZ300717A
公开(公告)日：1998-01-26
申请号：NZ30071795
申请日：1995-11-22
Applicant: QUALCOMM INC
Inventor： PADOVANI ROBERTO , HAMDY WALID , BAR-DAVID GIL
Abstract: An improved method and system for performing a pilot signal searching operation in anticipation of handoff in mobile station communication between base stations is disclosed herein. The searching operation is described herein as being implemented within a cellular communication system which uses code division multiple access (CDMA) modulation techniques. The mobile station maintains a list of an Active Set of pilot signals transmitted from base stations with which the mobile station is to communicate through, and a Neighbor Set of pilots from base stations within a predetermined proximity of the mobile station. In addition to the Neighbor and Active Sets of pilots, the mobile station maintains a list of Candidate and Pre-Candidate Sets of pilots. Based on analysis of the signal strength of the pilot signals received at the mobile station, base station entries from the Neighbor Set may be assigned to the Pre-Candidate and Candidate Sets, and eventually to the Active set. The searching operation contemplates comparing pilot signal strength measurements corresponding to each base station entry within the Neighbor Set to a first predetermined level. One or more entries from the Neighbor Set having a base station signal strength measurement greater than the first predetermined level may be placed in the Pre-Candidate Set. The strength of the pilot signals associated with entries in the Pre-Candidate Set are then further evaluated to determine eligibility within the Candidate Set, from which are selected the entries comprising the Active Set.
-
Patent Agency Ranking
公开(公告)号：CA2203256A1
公开(公告)日：1996-05-30
申请号：CA2203256
申请日：1995-11-22
Applicant: QUALCOMM INC
Inventor： HAMDY WALID , BAR-DAVID GIL , PADOVANI ROBERTO
Abstract: An improved method and system for performing a pilot signal searching operation in anticipation of handoff in mobile station (18) communication between base stations (12, 14). The mobile station (18) maintains a list of Active Set pilot signals transmitted from base stations with which the mobile station is to communicate through, and a list of Neighbor Set pilot signals (N) from base stations within a predetermined proximity of the mobile station (18). The searching operation contemplates comparing pilot signal strength measurements corresponding to each base station entry within the Neighbor Set (N) to a first predetermined level. One or more entries from the Neighbor Set (N) having a base station signal strength measurement greater than the first predetermined level may be placed in the Pre-Candidate Set (PC). The strength of the pilot signals associated with entries in the Pre-Candidate Set (PC) are then further evaluated to determine eligibility within the Candidate Set (C), from which are selected the entries comprising the Active Set.
-
公开(公告)号：AT502500T
公开(公告)日：2011-04-15
申请号：AT06718490
申请日：2006-01-13
Applicant: QUALCOMM INC
Inventor： SINNARAJAH RAGULAN , PATWARDHAN RAVINDRA , CHAN LESLIE , TIEDEMANN EDWARD , HAMDY WALID , ACHOUR BAAZIZ , PRICE PHIL , SHAH BHARAT , NASIELSKI JOHN
Abstract: A mobile station for wireless communication includes a control processor configured to generate a message for transmission on a reverse signaling channel, the message including a Station Class Mark field having a plurality of bits, a portion of the Station Class Mark field indicating that the mobile station is uniquely identified by a Mobile Station Equipment Identifier.
-
公开(公告)号：DE69932175D1
公开(公告)日：2006-08-10
申请号：DE69932175
申请日：1999-10-26
Applicant: QUALCOMM INC
Inventor： ANTONIO P , HAMDY WALID
Abstract: A detector is used to sample of set of power measurements of a receive signal. The receive signal may comprise one or more signals from remote users as well as interference. A variance of the set of power measurements is also determined. The variance is compared to an overload threshold value. If the variance exceeds the overload threshold value, for some period of time, the system is declared to be operating at a potentially unstable point. In this state, future connection originations are denied.
-
公开(公告)号：AT274258T
公开(公告)日：2004-09-15
申请号：AT00928150
申请日：2000-04-11
Applicant: QUALCOMM INC
Inventor： HAMDY WALID , MATHE LENNART , SUTTON TODD
IPC: H04B1/7097 , H04B1/707 , H04B1/71 , H04Q7/34
Abstract: A method for detecting in-band interfering signals, in a wireless communication base station, the method comprising: performing downconversion and bandpass-filtering of a received analog signal to produce a downconverted bandpass-filtered analog signal which resides approximately within a predetermined reverse-link frequency band; performing automatic gain control (204) of said downconverted bandpass-filtered analog signal to produce a first gain-controlled signal whose RMS amplitude is approximately equal to a predetermined value; performing analog-to-digital conversion (208) of said first gain-controlled signal to create a stream of digital samples; performing analysis (212) of said stream of digital samples to create a first set of sub-band power measurements corresponding to the received power associated with adjacent frequency sub-bands, each sub-band representing a fraction of a predetermined spectrum analysis band, said spectrum analysis band including frequency components outside of said reverse-link frequency band; and performing spectrum evaluation (216), comprising: identifying a group of one or more adjacent sub-band power measurements which exceed a predetermined threshold; and identifying any group of one or more sub-band power measurements which is inside the reverse-link frequency band, and are less than a predetermined minimum or threshold.
-
公开(公告)号：DE69526963T2
公开(公告)日：2003-01-23
申请号：DE69526963
申请日：1995-11-22
Applicant: QUALCOMM INC
Inventor： PADOVANI ROBERTO , HAMDY WALID , BAR-DAVID GIL
Abstract: An improved method and system for performing a pilot signal searching operation in anticipation of handoff in mobile station communication between base stations is disclosed herein. The searching operation is described herein as being implemented within a cellular communication system which uses code division multiple access (CDMA) modulation techniques. The mobile station maintains a list of an Active Set of pilot signals transmitted from base stations with which the mobile station is to communicate through, and a Neighbor Set of pilots from base stations within a predetermined proximity of the mobile station. In addition to the Neighbor and Active Sets of pilots, the mobile station maintains a list of Candidate and Pre-Candidate Sets of pilots. Based on analysis of the signal strength of the pilot signals received at the mobile station, base station entries from the Neighbor Set may be assigned to the Pre-Candidate and Candidate Sets, and eventually to the Active set. The searching operation contemplates comparing pilot signal strength measurements corresponding to each base station entry within the Neighbor Set to a first predetermined level. One or more entries from the Neighbor Set having a base station signal strength measurement greater than the first predetermined level may be placed in the Pre-Candidate Set. The strength of the pilot signals associated with entries in the Pre-Candidate Set are then further evaluated to determine eligibility within the Candidate Set, from which are selected the entries comprising the Active Set.
-
-
-
-
-
-
-
-
-
Search Results
37
records
(took 0.022 seconds)
