DE69522918D1 - Verfahren und vorrichtung zur simulation der von teilnehmern empfangenen interferenz in einem spreizspektrum-kommunikationssystem - Google Patents

Verfahren und vorrichtung zur simulation der von teilnehmern empfangenen interferenz in einem spreizspektrum-kommunikationssystem

Info

Publication number
DE69522918D1
DE69522918D1 DE69522918T DE69522918T DE69522918D1 DE 69522918 D1 DE69522918 D1 DE 69522918D1 DE 69522918 T DE69522918 T DE 69522918T DE 69522918 T DE69522918 T DE 69522918T DE 69522918 D1 DE69522918 D1 DE 69522918D1
Authority
DE
Germany
Prior art keywords
base station
composite signal
signal energy
signal
communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69522918T
Other languages
English (en)
Other versions
DE69522918T2 (de
Inventor
S Soliman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of DE69522918D1 publication Critical patent/DE69522918D1/de
Application granted granted Critical
Publication of DE69522918T2 publication Critical patent/DE69522918T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
DE69522918T 1994-07-13 1995-07-13 Verfahren und vorrichtung zur simulation der von teilnehmern empfangenen interferenz in einem spreizspektrum-kommunikationssystem Expired - Lifetime DE69522918T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27460994A 1994-07-13 1994-07-13
PCT/US1995/008890 WO1996002987A1 (en) 1994-07-13 1995-07-13 Method and apparatus for simulating interference received by subscribers in a spread spectrum communications system

Publications (2)

Publication Number Publication Date
DE69522918D1 true DE69522918D1 (de) 2001-10-31
DE69522918T2 DE69522918T2 (de) 2002-07-04

Family

ID=23048919

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69522918T Expired - Lifetime DE69522918T2 (de) 1994-07-13 1995-07-13 Verfahren und vorrichtung zur simulation der von teilnehmern empfangenen interferenz in einem spreizspektrum-kommunikationssystem

Country Status (21)

Country Link
US (1) US5596570A (de)
EP (1) EP0719480B1 (de)
JP (1) JP3078329B2 (de)
KR (1) KR100341959B1 (de)
CN (1) CN1130046C (de)
AT (1) ATE206257T1 (de)
AU (1) AU700994B2 (de)
BR (1) BR9506049A (de)
CA (1) CA2170517A1 (de)
DE (1) DE69522918T2 (de)
DK (1) DK0719480T3 (de)
ES (1) ES2164161T3 (de)
FI (1) FI961149A (de)
HK (1) HK1015194A1 (de)
IL (1) IL114559A0 (de)
MX (1) MX9600953A (de)
PT (1) PT719480E (de)
RU (1) RU2189114C2 (de)
TW (1) TW275731B (de)
WO (1) WO1996002987A1 (de)
ZA (1) ZA955600B (de)

Families Citing this family (101)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US6693951B1 (en) * 1990-06-25 2004-02-17 Qualcomm Incorporated System and method for generating signal waveforms in a CDMA cellular telephone system
US5754961A (en) 1994-06-20 1998-05-19 Kabushiki Kaisha Toshiba Radio communication system including SDL having transmission rate of relatively high speed
ZA955605B (en) * 1994-07-13 1996-04-10 Qualcomm Inc System and method for simulating user interference received by subscriber units in a spread spectrum communication network
GB2296625B (en) * 1994-12-23 1999-04-14 Nokia Mobile Phones Ltd Apparatus and method for data transmission
US5696789A (en) * 1995-03-06 1997-12-09 Unisys Corporation Apparatus and method for signal identification
US5812522A (en) * 1995-03-31 1998-09-22 Airtouch Communications, Inc. Location-ruled radio-integrated network
US6816473B2 (en) 1995-06-30 2004-11-09 Interdigital Technology Corporation Method for adaptive forward power control for spread-spectrum communications
US6697350B2 (en) 1995-06-30 2004-02-24 Interdigital Technology Corporation Adaptive vector correlator for spread-spectrum communications
ZA965340B (en) * 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US6885652B1 (en) * 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US6788662B2 (en) 1995-06-30 2004-09-07 Interdigital Technology Corporation Method for adaptive reverse power control for spread-spectrum communications
US7020111B2 (en) * 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
US7072380B2 (en) * 1995-06-30 2006-07-04 Interdigital Technology Corporation Apparatus for initial power control for spread-spectrum communications
US7123600B2 (en) * 1995-06-30 2006-10-17 Interdigital Technology Corporation Initial power control for spread-spectrum communications
US7929498B2 (en) * 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US6487190B1 (en) 1996-06-27 2002-11-26 Interdigital Technology Corporation Efficient multichannel filtering for CDMA modems
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US5794128A (en) * 1995-09-20 1998-08-11 The United States Of America As Represented By The Secretary Of The Army Apparatus and processes for realistic simulation of wireless information transport systems
FR2739512B1 (fr) * 1995-10-03 1997-10-31 France Telecom Modelisation des interferences dans un reseau radiotelephonique cellulaire
US5848160A (en) * 1996-02-20 1998-12-08 Raytheon Company Digital synthesized wideband noise-like waveform
US6308072B1 (en) * 1996-04-26 2001-10-23 Motorola, Inc. Method and apparatus for controlling a wireless communication system
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
US5724363A (en) * 1996-06-21 1998-03-03 Breya; Edward F. Optical analog signal transmission system
US6067446A (en) * 1996-07-11 2000-05-23 Telefonaktiebolaget Lm Ericsson Power presetting in a radio communication system
IL119694A0 (en) 1996-11-26 1997-06-10 Point Ltd V A method and device to disable cellular communication
GB2320648A (en) * 1996-12-20 1998-06-24 Dsc Telecom Lp Controlling interference in a cell of a wireless telecommunications system
JP3585333B2 (ja) * 1996-12-26 2004-11-04 松下電器産業株式会社 Ｃｄｍａ基地局装置
US5978650A (en) * 1997-01-21 1999-11-02 Adc Telecommunications, Inc. System and method for transmitting data
US6122266A (en) * 1997-02-19 2000-09-19 Lucent Technologies Inc. Multi-level sectorized CDMA communications
US6009129A (en) * 1997-02-28 1999-12-28 Nokia Mobile Phones Device and method for detection and reduction of intermodulation distortion
WO1998056192A2 (en) * 1997-06-02 1998-12-10 Netline Communications Technologies (Nct) Ltd. Cellular communications firewall
US5983080A (en) * 1997-06-03 1999-11-09 At & T Corp Apparatus and method for generating voice signals at a wireless communications station
US6075792A (en) 1997-06-16 2000-06-13 Interdigital Technology Corporation CDMA communication system which selectively allocates bandwidth upon demand
US6405043B1 (en) * 1997-07-02 2002-06-11 Scoreboard, Inc. Method to characterize the prospective or actual level of interference at a point, in a sector, and throughout a cellular system
US6052584A (en) * 1997-07-24 2000-04-18 Bell Atlantic Nynex Mobile CDMA cellular system testing, analysis and optimization
US20020051434A1 (en) * 1997-10-23 2002-05-02 Ozluturk Fatih M. Method for using rapid acquisition spreading codes for spread-spectrum communications
US6236363B1 (en) 1998-01-30 2001-05-22 Micronetics Wireless Smart antenna channel simulator and test system
US5973638A (en) * 1998-01-30 1999-10-26 Micronetics Wireless, Inc. Smart antenna channel simulator and test system
US6188892B1 (en) * 1998-02-13 2001-02-13 Qualcomm Inc. System and method for base station initiated call setup
SE513988C2 (sv) * 1998-03-30 2000-12-04 Ericsson Telefon Ab L M Förfarande och anordning för alstring av interferens över luftgränssnittet i ett cellulärt nät
EP1710932B1 (de) * 1998-05-20 2011-10-26 NTT DoCoMo, Inc. Störungsvermeidung in Funkkommunikationssystemen
KR20000014423A (ko) 1998-08-17 2000-03-15 윤종용 부호분할다중접속 통신시스템의 통신제어장치 및 방법
KR100270376B1 (ko) 1998-08-19 2000-11-01 윤종용 무선데이터 서비스장치의 기능시험을 위한 회선 호 발생기 및기능시험 방법
US7190688B1 (en) * 1998-09-21 2007-03-13 Lucent Technologies Inc. Method and apparatus for adaptive setting of initial traffic power
DE69937061T2 (de) * 1998-09-21 2008-05-29 Nokia Corp. Gerät und verfahren zur leistungsregelung eines kommunikationsgerätes
US6377555B1 (en) * 1998-09-22 2002-04-23 Jhong Sam Lee Method for determining forward link channel powers for a CDMA cellular or PCS system
US6690652B1 (en) * 1998-10-26 2004-02-10 International Business Machines Corporation Adaptive power control in wideband CDMA cellular systems (WCDMA) and methods of operation
US6360094B1 (en) * 1998-12-21 2002-03-19 Nortel Networks Limited Method for locating antenna problems in a cellular communications network
GB9828209D0 (en) * 1998-12-21 1999-02-17 Northern Telecom Ltd A cellular communications system
US6766164B1 (en) * 1999-01-19 2004-07-20 Lucent Technologies Inc. System and method for providing radio frequency conditions for testing wireless communications equipment
US6498934B1 (en) 1999-03-24 2002-12-24 Telefonaktiebologet Lm Ericsson (Publ) Channel allocation using enhanced pathloss estimates
KR100305764B1 (ko) * 1999-06-21 2001-11-01 서평원 무선가입자망 시스템 순방향 전력비 제어장치 및 방법
US6332076B1 (en) * 1999-06-28 2001-12-18 Ericsson Inc. Method and system for identifying and analyzing downlink interference sources in a telecommunications network
US6298242B1 (en) * 1999-07-22 2001-10-02 Qualcomm Inc. Method and apparatus for reducing frame error rate through signal power adjustment
US6442384B1 (en) * 1999-10-22 2002-08-27 Ericsson Inc. System and method for identification of uplink/downlink interference sources
JP3688166B2 (ja) 1999-11-26 2005-08-24 シャープ株式会社 Ｃｄｍａ変調方法及びその装置
US6542538B2 (en) * 2000-01-10 2003-04-01 Qualcomm Incorporated Method and apparatus for testing wireless communication channels
US6885694B1 (en) 2000-02-29 2005-04-26 Telefonaktiebolaget Lm Ericsson (Publ) Correction of received signal and interference estimates
US6668333B1 (en) * 2000-02-29 2003-12-23 Agere Systems Inc. Method and apparatus for evaluating effects of switching noise in digital and analog circuitry
US6456851B1 (en) * 2000-03-06 2002-09-24 Aurora Networks, Inc. Wireless communications architecture
CN1636327A (zh) * 2000-05-12 2005-07-06 高通股份有限公司 在cdma媒介数据率系统中改进稳定性和容量的方法和设备
US6816709B2 (en) 2000-08-19 2004-11-09 Pctel Maryland, Inc. Method and apparatus for testing CDMA signal propagation and coverage
US20050198688A1 (en) * 2000-09-19 2005-09-08 Fong Thomas K.T. System and method for digitally monitoring a cable plant
US6560440B1 (en) 2000-10-10 2003-05-06 General Dynamics Decision Systems, Inc. Method for precompensating frequency data for use in high-velocity satellite communication systems
US6999500B2 (en) * 2000-11-03 2006-02-14 Qualcomm Inc. System for direct sequence spreading
US6961431B2 (en) * 2001-02-28 2005-11-01 Lockheed Martin Corp. Analog privacy scrambler and scrambling method
US20020183053A1 (en) * 2001-05-29 2002-12-05 Muralimohan Gopalakrishna Methods and systems for testing macrodiversity and handover functionality of a radio network controller
US7024161B1 (en) 2001-08-08 2006-04-04 Cellco Partnership Modular wireless device test set
US7603081B2 (en) * 2001-09-14 2009-10-13 Atc Technologies, Llc Radiotelephones and operating methods that use a single radio frequency chain and a single baseband processor for space-based and terrestrial communications
EP1298949B1 (de) * 2001-09-28 2005-03-02 Motorola, Inc. Kommunikationssystem zur Detektion von ausserhalb des Systems erzeugter Interferenz
FI113313B (fi) * 2001-11-27 2004-03-31 Elektrobit Oy Menetelmä ja laitteisto radiokanavan simuloimiseksi
WO2003069814A2 (en) * 2002-02-15 2003-08-21 Dyaptive Systems Incorporated Wireless network simulator
US6973188B1 (en) * 2002-02-25 2005-12-06 Lockheed Martin Corporation Analog scrambler
US6876868B2 (en) * 2002-04-08 2005-04-05 Motorola, Inc. System and method for predictive transmit power control for mobile stations in a multiple access wireless communication system
US7184713B2 (en) * 2002-06-20 2007-02-27 Qualcomm, Incorporated Rate control for multi-channel communication systems
DE10229860A1 (de) * 2002-07-03 2004-01-29 Infineon Technologies Ag Verfahren und Sendevorrichtung zum Übertragen eines zweiwertigen Signals
US7411923B2 (en) * 2002-11-14 2008-08-12 Qualcomm Incorporated Wireless communication rate shaping
US7411974B2 (en) * 2002-11-14 2008-08-12 Qualcomm Incorporated Wireless communication rate shaping
DE102004008444A1 (de) * 2004-02-19 2005-09-08 Global Scaling Technologies Ag Verfahren und Einrichtung zur drahtlosen Datenübertragung
IL161419A (en) 2004-04-15 2010-02-17 Alvarion Ltd Handling communication interferences in wireless systems
US7054781B2 (en) * 2004-05-25 2006-05-30 Elektrobit Oy Radio channel simulation
US7129753B2 (en) * 2004-05-26 2006-10-31 Infineon Technologies Ag Chip to chip interface
US7551582B2 (en) * 2004-10-12 2009-06-23 Nextel Communications Inc. System and method for optimizing walsh code assignments
US7400887B2 (en) * 2005-03-17 2008-07-15 Lucent Technologies Inc. Method for estimating the downlink capacity in a spread spectrum wireless communications system
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
US20070230356A1 (en) * 2006-04-04 2007-10-04 Kalantri Sacchindrakumar G Method and apparatus for enabling FLO device certification
KR100912797B1 (ko) * 2007-02-23 2009-08-18 삼성전자주식회사 다중 주파수 할당을 지원하는 광대역 무선통신시스템의주파수 할당별 전력 배분 장치 및 방법
DE102007010868A1 (de) * 2007-03-06 2008-09-11 Rohde & Schwarz Gmbh & Co. Kg Vorrichtung und Verfahren zur Ermittlung eines Übertragungsverhaltens von Unterkanälen
CN101335962B (zh) * 2007-06-25 2012-07-25 电信科学技术研究院 一种模拟蜂窝网络环境下的信号发生方法及装置
DE102008018385A1 (de) * 2008-04-11 2009-10-15 Rohde & Schwarz Gmbh & Co. Kg Testgerät zum Testen der Übertragungsqualität eines Funkgeräts
US8868452B2 (en) * 2008-05-01 2014-10-21 Accenture Global Services Limited Smart grid deployment simulator
US8014436B2 (en) * 2008-07-02 2011-09-06 Telefonaktiebolaget L M Ericsson (Publ) Multi-dimensional signal of reduced peak-to-RMS ratio
US8711760B2 (en) * 2010-03-26 2014-04-29 Intel Corporation Method and apparatus to adjust received signal
US9125068B2 (en) 2010-06-04 2015-09-01 Ixia Methods, systems, and computer readable media for simulating realistic movement of user equipment in a long term evolution (LTE) network
US9596166B2 (en) 2013-04-26 2017-03-14 Ixia Methods, systems, and computer readable media for testing inter-cell interference coordination capabilities of wireless access access nodes
US9351186B2 (en) 2013-05-16 2016-05-24 Ixia Methods, systems, and computer readable media for frequency selective channel modeling
US10542443B2 (en) 2017-10-27 2020-01-21 Keysight Technologies, Inc. Methods, systems, and computer readable media for testing long term evolution (LTE) air interface device using emulated noise in unassigned resource blocks (RBs)
RU191159U1 (ru) * 2019-05-06 2019-07-25 ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ КАЗЕННОЕ ВОЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ Военная академия Ракетных войск стратегического назначения имени Петра Великого МИНИСТЕРСТВА ОБОРОНЫ РОССИЙСКОЙ ФЕДЕРАЦИИ Устройство для моделирования системы связи
US11089495B2 (en) 2019-07-11 2021-08-10 Keysight Technologies, Inc. Methods, systems, and computer readable media for testing radio access network nodes by emulating band-limited radio frequency (RF) and numerology-capable UEs in a wideband 5G network
CN111399804B (zh) * 2020-03-04 2023-07-25 成都卫士通信息产业股份有限公司 一种随机数生成方法、装置、智能移动终端及存储介质

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317214A (en) * 1980-07-14 1982-02-23 Attinello John S Apparatus for simulating interference transmissions
US4470138A (en) * 1982-11-04 1984-09-04 The United States Of America As Represented By The Secretary Of The Army Non-orthogonal mobile subscriber multiple access system
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5148548A (en) * 1989-12-19 1992-09-15 Northern Telecom Limited Method of monitoring cellular radio channels to avoid adjacent and co-channel interference
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US5136612A (en) * 1990-12-31 1992-08-04 At&T Bell Laboratories Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system
JP2674404B2 (ja) * 1991-12-13 1997-11-12 日本電気株式会社 基地局カバレッジエリア制御方式
US5410737A (en) * 1992-04-27 1995-04-25 American Pcs L.P. Frequency agile sharing technology (FAST) for a personal communications service system
US5224122A (en) * 1992-06-29 1993-06-29 Motorola, Inc. Method and apparatus for canceling spread-spectrum noise

Also Published As

Publication number Publication date
EP0719480A1 (de) 1996-07-03
JP3078329B2 (ja) 2000-08-21
KR960705419A (ko) 1996-10-09
ATE206257T1 (de) 2001-10-15
BR9506049A (pt) 1997-08-05
DK0719480T3 (da) 2002-01-21
DE69522918T2 (de) 2002-07-04
PT719480E (pt) 2002-03-28
CN1130451A (zh) 1996-09-04
EP0719480B1 (de) 2001-09-26
US5596570A (en) 1997-01-21
ES2164161T3 (es) 2002-02-16
MX9600953A (es) 1997-06-28
ZA955600B (en) 1996-04-02
IL114559A0 (en) 1995-11-27
AU700994B2 (en) 1999-01-14
WO1996002987A1 (en) 1996-02-01
JPH09503119A (ja) 1997-03-25
FI961149A0 (fi) 1996-03-12
TW275731B (de) 1996-05-11
AU3099095A (en) 1996-02-16
HK1015194A1 (en) 1999-10-08
CN1130046C (zh) 2003-12-03
FI961149A (fi) 1996-05-10
KR100341959B1 (ko) 2002-11-22
RU2189114C2 (ru) 2002-09-10
CA2170517A1 (en) 1996-02-01

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