公开(公告)号：WO1996016524A2

公开(公告)日：1996-05-30

申请号：PCT/US1995015298

申请日：1995-11-22

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  PADOVANI, Roberto ,  HAMDY, Walid ,  BAR-DAVID, Gil

IPC: H04Q07/38

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.

Abstract translation: 一种改进的方法和系统，用于执行导频信号搜索操作以预期基站（12,14）中的移动台（18）中的切换。 移动台（18）维护从移动台要与之进行通信的基站发送的活动集导频信号的列表，以及来自移动站的预定接近范围内的基站的邻居集导频信号（N）的列表 （18）。 搜索操作考虑将对应于相邻集（N）内的每个基站条目的导频信号强度测量值与第一预定电平进行比较。 来自具有大于第一预定水平的基站信号强度测量的相邻集合（N）的一个或多个条目可以被放置在预先考虑集合（PC）中。 然后进一步评估与候选集（PC）中的条目相关联的导频信号的强度，以确定候选集（C）中的资格，从中选择包括活动集的条目。

公开(公告)号：EP0793895B1

公开(公告)日：2002-06-05

申请号：EP95944040.5

申请日：1995-11-22

Applicant: QUALCOMM INCORPORATED

Inventor： PADOVANI, Roberto ,  HAMDY, Walid ,  BAR-DAVID, Gil

IPC: H04Q7/38

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

公开(公告)号：EP1166458B1

公开(公告)日：2004-08-18

申请号：EP00928150.2

申请日：2000-04-11

Applicant: QUALCOMM Incorporated

Inventor： HAMDY, Walid ,  MATHE, Lennart ,  SUTTON, Todd

IPC: H04B1/707

CPC classification number: H04B1/7102 ,  H04K3/22 ,  H04K2203/16

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：EP1166458A1

公开(公告)日：2002-01-02

申请号：EP00928150.2

申请日：2000-04-11

Applicant: QUALCOMM Incorporated

Inventor： HAMDY, Walid ,  MATHE, Lennart ,  SUTTON, Todd

IPC: H04B1/707

CPC classification number: H04B1/7102 ,  H04K3/22 ,  H04K2203/16

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：EP1125466A1

公开(公告)日：2001-08-22

申请号：EP99971202.9

申请日：1999-10-26

Applicant: QUALCOMM Incorporated

Inventor： ANTONIO, Franklin, P. ,  HAMDY, Walid

IPC: H04Q7/38

CPC classification number: H04W28/26 ,  H04B17/382 ,  H04W52/343

Abstract: A detector (36) 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：EP1125466B1

公开(公告)日：2006-06-28

申请号：EP99971202.9

申请日：1999-10-26

Applicant: QUALCOMM INCORPORATED

Inventor： ANTONIO, Franklin, P. ,  HAMDY, Walid

IPC: H04Q7/38

CPC classification number: H04W28/26 ,  H04B17/382 ,  H04W52/343

Abstract: A detector (36) 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：EP0793895A2

公开(公告)日：1997-09-10

申请号：EP95944040.0

申请日：1995-11-22

Applicant: QUALCOMM INCORPORATED

Inventor： PADOVANI, Roberto ,  HAMDY, Walid ,  BAR-DAVID, Gil

IPC: H04J13 ,  H04B1 ,  H04B7 ,  H04W36

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.