ID29480A - Batas data yang mengetahui stasiun basis membantu metoda lokasi posisi - Google Patents
Batas data yang mengetahui stasiun basis membantu metoda lokasi posisiInfo
- Publication number
- ID29480A ID29480A IDW20010799A ID20010799A ID29480A ID 29480 A ID29480 A ID 29480A ID W20010799 A IDW20010799 A ID W20010799A ID 20010799 A ID20010799 A ID 20010799A ID 29480 A ID29480 A ID 29480A
- Authority
- ID
- Indonesia
- Prior art keywords
- helped
- know
- base station
- position location
- location method
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
- G01S5/0018—Transmission from mobile station to base station
- G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/246—Acquisition or tracking or demodulation of signals transmitted by the system involving long acquisition integration times, extended snapshots of signals or methods specifically directed towards weak signal acquisition
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/254—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to Doppler shift of satellite signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/258—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/30—Acquisition or tracking or demodulation of signals transmitted by the system code related
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
- G01S19/235—Calibration of receiver components
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Burglar Alarm Systems (AREA)
- Traffic Control Systems (AREA)
- Circuits Of Receivers In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/150,410 US6323805B1 (en) | 1998-09-09 | 1998-09-09 | Data boundary aware base station assisted position location |
Publications (1)
Publication Number | Publication Date |
---|---|
ID29480A true ID29480A (id) | 2001-08-30 |
Family
ID=22534396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IDW20010799A ID29480A (id) | 1998-09-09 | 1999-09-03 | Batas data yang mengetahui stasiun basis membantu metoda lokasi posisi |
Country Status (16)
Country | Link |
---|---|
US (3) | US6323805B1 (fi) |
EP (2) | EP1988406B1 (fi) |
JP (1) | JP4955148B2 (fi) |
KR (1) | KR100684086B1 (fi) |
CN (1) | CN1317093B (fi) |
AT (2) | ATE409870T1 (fi) |
AU (1) | AU6243699A (fi) |
BR (1) | BR9913549B1 (fi) |
CA (1) | CA2342987C (fi) |
DE (2) | DE69939654D1 (fi) |
ES (2) | ES2358623T3 (fi) |
FI (1) | FI115168B (fi) |
ID (1) | ID29480A (fi) |
IL (3) | IL141707A0 (fi) |
MX (1) | MXPA01002496A (fi) |
WO (1) | WO2000014571A1 (fi) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2667786C (en) * | 1995-10-09 | 2012-07-31 | Snaptrack, Inc. | Gps receiver and method for processing gps signals |
US6816710B2 (en) * | 1998-05-06 | 2004-11-09 | Snaptrack, Inc. | Method and apparatus for signal processing in a satellite positioning system |
US6211820B1 (en) * | 1998-09-09 | 2001-04-03 | Qualcomm Incorporated | Call maintainance during position location |
US6603800B1 (en) * | 1999-03-22 | 2003-08-05 | Interdigital Technology Corporation | CDMA location |
US6301545B1 (en) * | 1999-04-30 | 2001-10-09 | Sirf Technology, Inc. | Global positioning system tag system |
US20040143392A1 (en) | 1999-07-12 | 2004-07-22 | Skybitz, Inc. | System and method for fast acquisition reporting using communication satellite range measurement |
US8255149B2 (en) | 1999-07-12 | 2012-08-28 | Skybitz, Inc. | System and method for dual-mode location determination |
US6429811B1 (en) | 2000-02-15 | 2002-08-06 | Motorola, Inc. | Method and apparatus for compressing GPS satellite broadcast message information |
US6748225B1 (en) * | 2000-02-29 | 2004-06-08 | Metro One Telecommunications, Inc. | Method and system for the determination of location by retail signage and other readily recognizable landmarks |
FI110290B (fi) * | 2000-05-30 | 2002-12-31 | Nokia Corp | Menetelmä informaation vaiheen selvittämiseksi ja elektroniikkalaite |
US6329946B1 (en) * | 2000-05-31 | 2001-12-11 | Mitsubishi Denki Kabushiki Kaisha | GPS position measuring system and GPS position measuring apparatus |
US7369599B2 (en) * | 2000-12-18 | 2008-05-06 | Qualcomm Incorporated | Method and apparatus for reducing code phase search space |
US6377793B1 (en) | 2000-12-06 | 2002-04-23 | Xybernaut Corporation | System and method of accessing and recording messages at coordinate way points |
US6681107B2 (en) | 2000-12-06 | 2004-01-20 | Xybernaut Corporation | System and method of accessing and recording messages at coordinate way points |
US6438382B1 (en) * | 2001-02-14 | 2002-08-20 | Telefonaktiebolaget Lm Ericsson (Publ.) | Expedited location determination in analog service areas |
US6836506B2 (en) * | 2002-08-27 | 2004-12-28 | Qualcomm Incorporated | Synchronizing timing between multiple air link standard signals operating within a communications terminal |
US7283046B2 (en) | 2003-08-01 | 2007-10-16 | Spectrum Tracking Systems, Inc. | Method and system for providing tracking services to locate an asset |
JP3806425B2 (ja) * | 2003-12-01 | 2006-08-09 | マゼランシステムズジャパン株式会社 | 衛星測位方法及び衛星測位システム |
US7634033B1 (en) | 2006-02-10 | 2009-12-15 | L-3 Communications, Corp. | Spread spectrum detection system and method |
US7664164B1 (en) | 2006-02-10 | 2010-02-16 | L-3 Communications, Corp. | Correlation apparatus and method for accomodating spreading code frequency offset |
US7633995B1 (en) | 2006-02-10 | 2009-12-15 | L-3 Communications, Corp. | System and method for receiving spread spectrum encoded bursts using a common spreading code |
US8036312B2 (en) * | 2007-03-30 | 2011-10-11 | Freescale Semiconductor, Inc. | System and method for determining signal phase |
US8494094B2 (en) | 2010-08-02 | 2013-07-23 | Qualcomm Incorporated | Demodulation of data collected prior to bit edge detection |
KR101268291B1 (ko) * | 2010-09-03 | 2013-05-28 | 한국과학기술원 | 동료 지원을 통한 초고속 gnss 초기 위치 획득 장치, 방법 및 그 기록매체 |
US8929916B2 (en) * | 2012-05-10 | 2015-01-06 | Absolute Software Corporation | System, method and database for determining location by indirectly using GPS coordinates |
US8972166B2 (en) * | 2012-07-17 | 2015-03-03 | Lockheed Martin Corporation | Proactive mitigation of navigational uncertainty |
US10279893B2 (en) * | 2017-02-16 | 2019-05-07 | Bell Helicopter Textron Inc. | System and method for validating rotorcraft position coordinates |
US10845486B2 (en) | 2018-09-26 | 2020-11-24 | Qualcomm Incorporated | Satellite positioning system navigation bit aiding |
CN109613334B (zh) * | 2018-12-04 | 2022-02-25 | 上海司南卫星导航技术股份有限公司 | 一种频率估计装置、终端以及计算机可读介质 |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0083480B1 (en) * | 1981-12-31 | 1988-08-17 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Receivers for navigation satellite systems |
US4959656A (en) * | 1989-10-31 | 1990-09-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Efficient detection and signal parameter estimation with application to high dynamic GPS receiver |
US5019824A (en) * | 1990-05-01 | 1991-05-28 | The United States Of America As Represented By The Administrator, National Aeronautics And Space Administration | Multistage estimation of received carrier signal parameters under very high dynamic conditions of the receiver |
EP0501828B1 (en) * | 1991-02-28 | 2000-01-12 | Texas Instruments Incorporated | Method and system for a multi channel and search global position signal processor |
US5365450A (en) * | 1992-12-17 | 1994-11-15 | Stanford Telecommunications, Inc. | Hybrid GPS/data line unit for rapid, precise, and robust position determination |
US5726893A (en) * | 1992-12-17 | 1998-03-10 | Stanford Telecommunications, Inc. | Cellular telephone with voice-in-data modem |
FR2702320B1 (fr) * | 1993-03-03 | 1995-04-14 | Alcatel Radiotelephone | Procédé pour allouer un intervalle de temps au sein d'une trame à un mobile accédant à une cellule de communication et station émettrice-réceptrice de base mettant en Óoeuvre ce procédé. |
US5420592A (en) | 1993-04-05 | 1995-05-30 | Radix Technologies, Inc. | Separated GPS sensor and processing system for remote GPS sensing and centralized ground station processing for remote mobile position and velocity determinations |
DE4400331A1 (de) * | 1994-01-07 | 1995-07-27 | Sel Alcatel Ag | Funkzellen-Erweiterung |
US6307868B1 (en) * | 1995-08-25 | 2001-10-23 | Terayon Communication Systems, Inc. | Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops |
US5841396A (en) * | 1996-03-08 | 1998-11-24 | Snaptrack, Inc. | GPS receiver utilizing a communication link |
US6133871A (en) | 1995-10-09 | 2000-10-17 | Snaptrack, Inc. | GPS receiver having power management |
CA2667786C (en) * | 1995-10-09 | 2012-07-31 | Snaptrack, Inc. | Gps receiver and method for processing gps signals |
US5945944A (en) * | 1996-03-08 | 1999-08-31 | Snaptrack, Inc. | Method and apparatus for determining time for GPS receivers |
AU729697B2 (en) * | 1996-04-25 | 2001-02-08 | Sirf Technology, Inc. | Spread spectrum receiver with multi-bit correlator |
JP3231624B2 (ja) * | 1996-05-17 | 2001-11-26 | 松下電器産業株式会社 | Gps受信機 |
US6101178A (en) * | 1997-07-10 | 2000-08-08 | Ksi Inc. | Pseudolite-augmented GPS for locating wireless telephones |
US6075987A (en) * | 1998-02-27 | 2000-06-13 | Ericsson Inc. | Stand alone global positioning system (GPS) and method with high sensitivity |
US6081229A (en) * | 1998-03-17 | 2000-06-27 | Qualcomm Incorporated | System and method for determining the position of a wireless CDMA transceiver |
US6577689B1 (en) * | 1998-04-24 | 2003-06-10 | Cirrus Logic, Inc. | Timing recovery system for a 10 BASE-T/100 BASE-T ethernet physical layer line interface |
US6370397B1 (en) * | 1998-05-01 | 2002-04-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Search window delay tracking in code division multiple access communication systems |
US6232922B1 (en) * | 1998-05-12 | 2001-05-15 | Mcintosh John C. | Passive three dimensional track of non-cooperative targets through opportunistic use of global positioning system (GPS) and GLONASS signals |
US6363261B1 (en) * | 1998-08-31 | 2002-03-26 | Lucent Technologies Inc. | Extended range concentric cell base station |
US6597906B1 (en) * | 1999-01-29 | 2003-07-22 | International Business Machines Corporation | Mobile client-based station communication based on relative geographical position information |
US6577271B1 (en) * | 1999-03-30 | 2003-06-10 | Sirf Technology, Inc | Signal detector employing coherent integration |
US6453237B1 (en) * | 1999-04-23 | 2002-09-17 | Global Locate, Inc. | Method and apparatus for locating and providing services to mobile devices |
US6211819B1 (en) * | 1999-08-27 | 2001-04-03 | Motorola, Inc. | Mobile station location determination in a radio communication system |
US6750814B1 (en) * | 2000-09-18 | 2004-06-15 | Cellguide Ltd. | Efficient algorithm for processing GPS signals |
-
1998
- 1998-09-09 US US09/150,410 patent/US6323805B1/en not_active Expired - Lifetime
-
1999
- 1999-09-03 EP EP08013899A patent/EP1988406B1/en not_active Expired - Lifetime
- 1999-09-03 DE DE69939654T patent/DE69939654D1/de not_active Expired - Lifetime
- 1999-09-03 CA CA002342987A patent/CA2342987C/en not_active Expired - Lifetime
- 1999-09-03 IL IL14170799A patent/IL141707A0/xx active IP Right Grant
- 1999-09-03 DE DE69943231T patent/DE69943231D1/de not_active Expired - Lifetime
- 1999-09-03 EP EP99949596A patent/EP1118015B1/en not_active Expired - Lifetime
- 1999-09-03 KR KR1020017003065A patent/KR100684086B1/ko not_active IP Right Cessation
- 1999-09-03 MX MXPA01002496A patent/MXPA01002496A/es active IP Right Grant
- 1999-09-03 CN CN998107263A patent/CN1317093B/zh not_active Expired - Lifetime
- 1999-09-03 ID IDW20010799A patent/ID29480A/id unknown
- 1999-09-03 ES ES08013899T patent/ES2358623T3/es not_active Expired - Lifetime
- 1999-09-03 AT AT99949596T patent/ATE409870T1/de not_active IP Right Cessation
- 1999-09-03 JP JP2000569261A patent/JP4955148B2/ja not_active Expired - Lifetime
- 1999-09-03 AT AT08013899T patent/ATE499617T1/de not_active IP Right Cessation
- 1999-09-03 AU AU62436/99A patent/AU6243699A/en not_active Abandoned
- 1999-09-03 BR BRPI9913549-3A patent/BR9913549B1/pt active IP Right Grant
- 1999-09-03 ES ES99949596T patent/ES2313794T3/es not_active Expired - Lifetime
- 1999-09-03 WO PCT/US1999/020372 patent/WO2000014571A1/en active IP Right Grant
-
2001
- 2001-02-28 IL IL141707A patent/IL141707A/en not_active IP Right Cessation
- 2001-03-02 FI FI20010422A patent/FI115168B/fi not_active IP Right Cessation
- 2001-09-18 US US09/956,325 patent/US7457630B2/en not_active Expired - Fee Related
-
2006
- 2006-03-05 IL IL174120A patent/IL174120A/en not_active IP Right Cessation
-
2008
- 2008-11-24 US US12/277,104 patent/US7949351B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
IL141707A (en) | 2006-10-31 |
EP1118015B1 (en) | 2008-10-01 |
ES2313794T3 (es) | 2009-03-01 |
AU6243699A (en) | 2000-03-27 |
KR100684086B1 (ko) | 2007-02-16 |
FI20010422A (fi) | 2001-03-02 |
JP2002524750A (ja) | 2002-08-06 |
CN1317093A (zh) | 2001-10-10 |
CA2342987C (en) | 2009-07-07 |
DE69939654D1 (de) | 2008-11-13 |
DE69943231D1 (de) | 2011-04-07 |
US6323805B1 (en) | 2001-11-27 |
KR20010075019A (ko) | 2001-08-09 |
US7949351B2 (en) | 2011-05-24 |
BR9913549B1 (pt) | 2013-05-28 |
ATE499617T1 (de) | 2011-03-15 |
US7457630B2 (en) | 2008-11-25 |
CA2342987A1 (en) | 2000-03-16 |
IL141707A0 (en) | 2002-03-10 |
ES2358623T3 (es) | 2011-05-12 |
ATE409870T1 (de) | 2008-10-15 |
IL174120A (en) | 2010-11-30 |
EP1988406A1 (en) | 2008-11-05 |
EP1118015A1 (en) | 2001-07-25 |
CN1317093B (zh) | 2012-10-31 |
US20020031192A1 (en) | 2002-03-14 |
FI115168B (fi) | 2005-03-15 |
US20090082036A1 (en) | 2009-03-26 |
JP4955148B2 (ja) | 2012-06-20 |
IL174120A0 (en) | 2006-08-01 |
BR9913549A (pt) | 2001-10-09 |
EP1988406B1 (en) | 2011-02-23 |
WO2000014571A1 (en) | 2000-03-16 |
MXPA01002496A (es) | 2002-04-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ID29480A (id) | Batas data yang mengetahui stasiun basis membantu metoda lokasi posisi | |
MXPA03003652A (es) | Metodo y aparato para calcular la velocidad de una terminal en un sistema de comunicacion inalambrico. | |
MXPA00010141A (es) | Metodo y aparato para determinar el tiempo en un sistema de posicionamiento de satelite. | |
MY115614A (en) | Reduced global positioning system receiver code shift search space for a cellular telephone system | |
TWI257261B (en) | Location based method and system for wireless mobile unit communication | |
HK1066272A1 (en) | Real-time navigation system for mobile environment | |
EP1262790A3 (en) | Method and apparatus for determining time for GPS receivers | |
GB9716207D0 (en) | Position information management system | |
WO2002052296A3 (en) | Method and apparatus for a positioning system and augmentation of gps positioning | |
MY133921A (en) | Positioning system, positioning method and positioning device | |
WO2005065320A3 (en) | Tdoa/gps hybrid wireless location system | |
WO2002039210A3 (en) | System and method for updating stored information in electronic devices | |
BR9912895A (pt) | Método e equipamento para aquisição de sinais de um sistema de posicionamento por satélite | |
CA2274138A1 (en) | Method and apparatus for restricting operation of cellular telephones to well delineated geographical areas | |
WO2002041118A3 (en) | System and method for device-to-device pervasive digital output | |
HUP0102510A2 (hu) | Rendszer és eljárás vezetéknélküli CDMA adó-vevő helyzetének meghatározására | |
FR2737627B1 (fr) | Systeme de transmission de signaux radioelectriques via un satellite de communication geostationnaire, notamment pour des communications avec des terminaux mobiles portables | |
ATE364848T1 (de) | Kreuzkorrelationssystem zur zeitrückgewinnung in netzwerk-unterstützer gps-ortung | |
GB0117883D0 (en) | Method and apparatus for estimating gps time | |
MY139756A (en) | Position detection system integrated into mobile terminal | |
DE60001161D1 (de) | Verfahren und vorrichtung zur automatischen standortsabhängigen ausserbetriebsetzung | |
FI20001453A (fi) | Liiketilan estimointi | |
DK1427992T3 (da) | Fremgangsmåde til bestemmelse af positionen af en mobil anordning, især en nödkaldsanordning, nödkaldssystem og nödkaldsanordning | |
DK0690642T3 (da) | System, der indeholder en radiotelefon og en modulator/demodulator samt en fremgangsmåde til oprettelse af en dataforbindelse |