公开(公告)号：DE60013108D1

公开(公告)日：2004-09-23

申请号：DE60013108

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：HK1042996A1

公开(公告)日：2002-08-30

申请号：HK02104769

申请日：2002-06-27

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：AU1235100A

公开(公告)日：2000-05-15

申请号：AU1235100

申请日：1999-10-26

Applicant: QUALCOMM INC

Inventor： ANTONIO FRANKLIN P ,  HAMDY WALID

IPC: H04B7/005 ,  H04B7/26 ,  H04W28/26 ,  H04W52/34 ,  H04Q7/38

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：MX9703723A

公开(公告)日：1997-09-30

申请号：MX9703723

申请日：1995-11-22

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  HAMDY WALID ,  BAR-DAVID GIL

IPC: H04B1/707 ,  H04B7/26 ,  H04W36/30 ,  H04Q07/38 ,  H04B07/26 ,  H04B01/707

Abstract: Un método y sistema mejorado para llevar a cabo una operacion de busqueda de señal piloto previa a la transferencia en la estacion movil (18) de la comunicacion entre las estaciones base (12, 14). La estacion movil (18) mantiene una lista de señales piloto del Conjunto Activo transmitidas a partir de estaciones base a través de las cuales se comunica la estacion movil, y una lista de señales piloto del Conjunto Vecino (N) provenientes de las estaciones base dentro de una proximidad predeterminada de la estacion movil (18). La operacion de busqueda contempla la comparacion de las mediciones de resistencia de señal piloto correspondientes a cada entrada de estacion base dentro del Conjunto Vecino (N) con un primer nivel predeterminado. Una o más entradas provenientes del Conjunto Vecino (N) que tienen una medicion de resistencia de señal de estacion base mayor al primer nivel predeterminado pueden colocarse en el Conjunto Pre-Candidato (PC). Las resistencias de las señales piloto asociadas con entradas en el Conjunto Pre-Candidato (PC) se evaluan después de manera adicional para predeterminar la elegibilidad dentro del Conjunto Candidato (C), del cual se seleccionan las entradas que comprenden el Conjunto Activo.

公开(公告)号：ZA959883B

公开(公告)日：1996-07-09

申请号：ZA959883

申请日：1995-11-21

Applicant: QUALCOMM INC

Inventor： BAR-DAVID GIL ,  PADOVANI ROBERTO ,  HAMDY WALID

IPC: H04B1/707 ,  H04B7/26 ,  H04W36/30 ,  H04J ,  H04Q ,  H04L ,  H04B

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：ZA9509883B

公开(公告)日：1996-07-09

申请号：ZA9509883

申请日：1995-11-21

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  HAMDY WALID ,  BAR-DAVID GIL

IPC: H04B1/707 ,  H04B7/26 ,  H04W36/30 ,  H04J ,  H04B ,  H04L ,  H04Q

CPC classification number: H04W36/30 ,  H04B1/707 ,  H04B7/2637

公开(公告)号：WO9616524A3

公开(公告)日：1996-08-08

申请号：PCT/US9515298

申请日：1995-11-22

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  HAMDY WALID ,  BAR-DAVID GIL

IPC: H04B1/707 ,  H04B7/26 ,  H04W36/30 ,  H04Q7/38

CPC classification number: H04W36/30 ,  H04B1/707 ,  H04B7/2637

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.