EP0893893A2 - Verfahren und Vorrichtung zur Senderidentifikation in Gleichwellennetzen - Google Patents
Verfahren und Vorrichtung zur Senderidentifikation in Gleichwellennetzen Download PDFInfo
- Publication number
- EP0893893A2 EP0893893A2 EP98112523A EP98112523A EP0893893A2 EP 0893893 A2 EP0893893 A2 EP 0893893A2 EP 98112523 A EP98112523 A EP 98112523A EP 98112523 A EP98112523 A EP 98112523A EP 0893893 A2 EP0893893 A2 EP 0893893A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- field strength
- measurement
- rotor
- omni
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
Definitions
- the invention relates to a method for Transmitter identification and a device for carrying it out of the method according to the preamble of patent claims 1 or 6.
- single-frequency networks such as DAB networks
- DAB networks is at every location the reception of the broadcast the energy of the received signal under certain circumstances through the contribution caused several stations.
- the individual amounts of the transmitters to the total amount of Field strengths at the location of the recipient are original initially not assignable. An assignment from a technical point of view is however necessary to make any changes to the Parameters of individual transmitters and thus their negative or positive contributions at the recipient's location ascertain.
- the invention is therefore based on the object Method and device for transmitter identification in To create single-frequency networks that allow the negative or positive contributions at the place of the recipient are to be determined, with the field strength amounts different transmitter locations in single-frequency networks can be identified, with the presence of Commonwave interference due to interference between Transmitter signals from different base stations involved Stations are identified and the field strength contributions of the individual stations are to be recorded.
- the device according to the invention is by the characterizing part of claim 6 characterized.
- the procedure in DAB networks Applies, but is not limited to, but can be used in any single-frequency network.
- the method uses knowledge of the geographical position of the transmitter locations in order to select the Field strength contributions of individual stations.
- the Device contains a continuously rotating Directional antenna, whose absolute angular position by means of a Compasses or in the effect of technically similar means the orientation of the measuring system, the the vehicle's name.
- the procedure is basic characterized in that during a test run in specified intervals the field strength signal of an antenna with all-round reception characteristics (omni-antenna) and angle-selective the field strength signal of a rotor antenna is measured.
- omni-antenna all-round reception characteristics
- the rotor antenna rotates in one rhythm or becomes situation-dependent gradually moved and the angle is along with the the respective measured value is saved. Knowing the Vehicle position (angle north over east) and the Rotor angle at the time of measurement is in a downstream operation the absolute angle to Time of measurement calculated. In addition, certain Values determined during a measurement, as later in individual is described. At the recording of the measured values post-processing follows. Through the geographical coordinates can be the respective values of the Field strength positioned and with map material be underlaid.
- the method described here or the one disclosed here Device for transmitter identification and field strength measurement in terrestrial single-wave networks, in mobile Measuring systems can be used are particularly noteworthy characterized in that no interventions in the station side Real operation are required and that they are inexpensive with few standard components can be.
- the evaluation method itself is extreme robust.
- Fig. 1 is a vector diagram for the multiple reception situation shown, that in principle the won Measured values M 'and M shows the level values P and reproduce respective times T, such as P0 and T0.
- FIG. 2 is a basic illustration of the extraction of the measured values shown. This is done by an omni or Directional antenna 2, which is at an angle ⁇ through the respective vehicle position is aligned, which over a downstream synchronization circuit 3 signals T0 / P0 delivers, achieves.
- the rotor antenna 1 supplies the signals T1, T2 ..., Tn, the level signals P1, P2 ..., Pn and the Angle ⁇ 1, ⁇ 2 ..., ⁇ n.
- T the field strength signal
- the Omni-antenna 2 as well as the field strength signal P0 the rotor antenna 1 measured.
- the rotor antenna 1 rotates doing so in a fixed, rigid rhythm and delivering a synchronization signal T0 / P0 at the output of the Synchronizer 3.
- the angle of the rotor antenna 1 is saved together with the respective measured value. From the Knowledge of the vehicle position (angle north over east) and the rotor angle at the time of measurement can be in one downstream process the absolute angle to Time of measurement can be calculated.
- GPS system Global Positioning System
- the measured values can then be post-processed in the correct position by the geographic coordinates positions of the respective field strength values and with the Map material to be underlaid. This can be done with the help of printing the measurement results on foil material and Placing them on cards or by electronic Intersection of the test drive with digital map material happen on a computing unit. An accurate assessment is aware of places with potential interference Locations of the transmitter locations are reproducible.
- the measuring device which as Basic circuit diagram is shown in Figures 3A and 3B, described. It is used to carry out the described procedure for transmitter identification and Field strength measurement in terrestrial single-wave networks, the can be used in mobile measuring systems, such as vehicles.
- the Technical example described refers to a Reception situation in which a television carrier as Signal source is used. Analogously, for others Carrier or modulation content a correspondingly adapted Evaluation methods are used.
- the TV signal will among other things because its shape is a favorable evaluation allowed. Because the conditions of spread only from the carrier frequency and not from the modulation content can depend on measurements with TV signals too Statements for frequency-adjacent carriers of others Services are derived (met).
- the measuring system consists of the omni-antenna 2, which is a TV receiver 4 is connected downstream.
- the output of this TV receiver 4 is connected to a demodulator 5, the output of which in turn is connected to a filter 6 for H + V.
- Whose Output signals are sent to a sample and hold unit 7 given that synchronized by means of a clock (clock) 8 is.
- the output of the sample and hold unit 7 opens an evaluation unit for the level P to a certain Given time T.
- the individual times T assigned level values P are stored in a memory 10 saved. Due to the stored distinctive Characteristics of the transmitters used for the measurement (geo coordinates, ERP, diagram, height, etc.) can Measured values are assigned to the individual transmitters.
- the 3B consists of a navigator 11, the Geo-coordinate signals 12 and control signals 13 for the Heading delivers. These signals are on a computer 14 given that also input signals from the Gets rotor antenna 1. The signals from the rotor antenna 1 also arrive at a measuring receiver 17, the one Demodulator 5 'contains, from there on a filter (H + V) 6 '. The H + V signals are on a sample and hold unit 7 ', which is the same as the sample present in FIG. 3A and hold unit 7 is synchronized by a clock 8 '. The output signal of this circuit is sent to an evaluation unit 9 'given the outputs with a memory 15 for the transmitter features and a memory 16 for the Coordinates of the measuring location are given.
- the stored measured values When evaluating the stored measured values are accessed and it the measured values and coordinates with the Prediction values of a single-frequency network planning compared.
- the evaluation creates a delay pattern and one Self-interference plot based on the system parameters of a selected single-frequency network.
- the use of the measurement results takes place, as already described, for targeted optimization existing single-frequency networks by changing location / antenna or additional locations (transmitter or Repeater).
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
- einer Antenne mit Rundum-Charakteristik (Omni-Antenne),
- einer Richtantenne, ständig mit gleichbleibender Drehzahl rotierend,
- einem (elektronischen) Kompaß, um die Ausrichtung des Meßfahrzeugs festzustellen und damit die absolute Richtung der Richtantenne festzustellen,
- einem Meßempfänger, um die weiteren notwendigen Signale zu erhalten,
- einer Meßdatenauswertung und Systemsteuerung und
- einem System zur Bestimmung der eigenen Fahrzeugposition.
- Fig. 1
- ein Vektordiagramm für die Mehrfachempfangssituation;
- Fig. 2
- eine grundsätzliche Darstellung zur Erklärung des Verfahrens und
- Fig. 3A + 3B
- ein Prinzipschaltbild der gesamten Meßanlage.
- 1
- Rotorantenne
- 2
- Omni-Antenne
- 3
- Synchronisator
- 4
- TV-Empfänger
- 5 und,5'
- Demodulator
- 6 und 6'
- Filter (H+V) für Signalauswertung
- 7 und 7'
- Sample und Hold Einheit
- 8 und 8'
- Takt (CLK)
- 9 und 9'
- Auswert-Einheit für Pegel
- 10
- Speicher
- 11
- Navigator
- 12
- Geo-Koordinaten-Signal
- 13
- Steuersignal (Steuerkurs)
- 14
- Rechner
- 15
- Speicher (Sendermerkmale)
- 16
- Speicher (Koordinaten des Meßortes)
- 17
- Meßwertempfänger
Claims (9)
- Verfahren zur Senderidentifikation und Feldstärkemessung in terrestrischen Gleichwellennetzen, das in mobilen Meßsystemen, wie Fahrzeugen, einsetzbar ist, dadurch gekennzeichnet,daß mit einer kontinuierlich rotierenden Richtantenne (1), die auf dem mobilen Meßsystem angeordnet ist, winkelselektiv ein Feldstärkesignal gemessen wird und daß außerdem in den gleichen Intervallen ein Feldstärkesignal einer Omni-Antenne (2) gemessen wird,daß die Rotorantenne (1) dabei in einem festgelegten starren Rhythmus rotiert,daß der Winkel der Rotorantenne (1) zusammen mit dem jeweiligen Meßwert gespeichert wird,daß aus der Ausrichtung des Fahrzeuges und des Rotorwinkels zum Zeitpunkt der Messung in einer nachgeschalteten Operation der jeweils absolute Winkel zum Zeitpunkt der Messung berechnet wird,daß außerdem die geographische Position des Fahrzeuges mit Hilfe eines bekannten Verfahrens oder Systems (zum Beispiel mittels des Global Positioning Systems (GPS)) ermittelt und gespeichert wird, unddaß in einer Nachverarbeitungsoperation die jeweiligen Werte der Feldstärke lagerichtig durch die geographischen Koordinaten positioniert und mit technisch aufbereiteten, insbesondere digitalisierten Landkarten unterlegt werden.
- Verfahren zur Senderidentifikation und Feldstärkemessung in terrestrischen Gleichwellennetzen, das in mobilen Meßsystemen wie Fahrzeugen eingesetzt werden kann und zur Aufnahme bestimmter Werte während der Messung dient, dadurch gekennzeichnet,daß ein Meßfenster der Rotorantenne (1) aufgrund der als bekannt vorausgesetzten Positionen der Basisstation so gewählt wird, daß nur die Feldstärken aus Richtung Basisstation berücksichtigt werden und wobei nur die Standorte berücksichtigt werden, an denen Gleichwellen-Störungen auftreten.
- Verfahren nach einem der Patentansprüche 1 oder 2, dadurch gekennzeichnet,daß nur eine oder keine Basisstation von der Rotorantenne (1) aufgenommen wird unddaß mittels eines Omni-Singals entschieden wird, ob eine Interferenz-Situation besteht.
- Verfahren nach einem der Patentansprüche 1 oder 2, dadurch gekennzeichnet,daß mehr als eine Station im Aufnahmebereich der Rotorantenne (1) liegt unddaß eine Identifikation der Stationen mit Hilfe ihrer Koordinaten erfolgt und die Feldstärken der einzelnen Stationen selektiv erfaßt werden.
- Verfahren nach einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet,daß in der Nachverarbeitung lagerichtig durch die geographischen Koordinaten die jeweiligen Werte der Feldstärke positioniert und mit technisch aufbereiteten, insbesondere digitalisierten Landkarten unterlegt werden, insbesondere durch elektronische Verschneidung der Meßfahrt mit digitalem Landkartenmaterial auf einem Rechner.
- Schaltungsanordnung und System zur Durchführung der Verfahren nach einem oder mehreren der Patentansprüche 1 bis 5, dadurch gekennzeichnet,daß die auf einer mobilen Meßstation, zum Beispiel einem Fahrzeug, angeordnete Meßanlage aus einer ständig mit gleichbleibender Drehzahl rotierenden Richtantenne (1), einer Omni-Antenne (2) mit Synchronisator (3), einem elektronischen Kompaß zur Feststellung der absoluten Richtung der Rotorantenne (1), einem Meßwertempfänger (17) für die erforderlichen Geo-Koordinaten-Signale (12) und Steuersignale (13), einem System zur Bestimmung der eigenen Fahrzeugposition, einer Meßdatenauswerteinrichtung (9, 9'), einem Rechner (14), Speichern (10, 15, 16) zur Systemsteuerung, besteht.
- Schaltungsanordnung nach Patentanspruch 6, dadurch gekennzeichnet,daß ein Navigator (11) zur Abgabe der Geo-Koordinaten-Signale (12) und der Steuerkurssignale (13) mit dem Rechner (14) verbunden ist, der außerdem mit der Rotorantenne (1) und einem Speicher (16) für die Koordinaten des Meßortes, der Pegel und der zugeordneten Zeitpunkte verbunden ist.
- Schaltungsanordnung nach einem der Patentansprüche 6 oder 7, dadurch gekennzeichnet,daß der Rotorantenne (1) ein Meßempfänger (17), ein Demodulator (5') und ein Filter nachgeschaltet sind, der seinerseits mit einer Sample und Hold-Einheit (7') verbunden ist, die getaktet den Steuerkurs in Form von Steuersignalen (H+V) liefert, die auf den Eingang einer Auswert-Einheit (9') gegeben werden, die ausgangsseitig mit dem Speicher (15) verbunden ist.
- Schaltungsanordnung nach den Patentansprüchen 6 oder 7, dadurch gekennzeichnet,daß der Omni-Antenne (2) ein TV-Empfänger (4), ein Demodulator (5) und ein Filter (6) nachgeschaltet sind, dessen Ausgang mit einer Sample und Hold-Einheit (7) verbunden ist, der eine Auswert-Einheit (9) für die Feldstärkepegel zu einem bestimmten Zeitpunkt nachgeschaltet ist, deren Ausgang direkt mit dem Speicher (10) verbunden sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997131664 DE19731664C1 (de) | 1997-07-23 | 1997-07-23 | Verfahren zur Senderidentifikation und Meßanordnung zur Duchführung des Verfahrens |
DE19731664 | 1997-07-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0893893A2 true EP0893893A2 (de) | 1999-01-27 |
EP0893893A3 EP0893893A3 (de) | 2004-01-21 |
EP0893893B1 EP0893893B1 (de) | 2006-04-19 |
Family
ID=7836652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980112523 Expired - Lifetime EP0893893B1 (de) | 1997-07-23 | 1998-07-07 | Verfahren zur Feldstärkemessung in Gleichwellennetzen und Messanordnung zur Durchführung des Verfahrens |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0893893B1 (de) |
DE (2) | DE19731664C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014127612A1 (zh) * | 2013-02-22 | 2014-08-28 | 中兴通讯股份有限公司 | 角度确定***和方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4138770A1 (de) * | 1991-11-26 | 1993-05-27 | Daimler Benz Ag | Verfahren zur digitalen datenuebertragung im nullsymbol des cofdm-modulationsverfahrens |
CA2208869C (en) * | 1994-12-27 | 2001-09-04 | Motorola, Inc. | Method and apparatus for identifying a transmitter in a simulcast radio communication system |
-
1997
- 1997-07-23 DE DE1997131664 patent/DE19731664C1/de not_active Expired - Fee Related
-
1998
- 1998-07-07 DE DE59813492T patent/DE59813492D1/de not_active Expired - Lifetime
- 1998-07-07 EP EP19980112523 patent/EP0893893B1/de not_active Expired - Lifetime
Non-Patent Citations (3)
Title |
---|
COMINETTI M: "THE RAI PLANS FOR DAB FIELD TESTS" EBU REVIEW- TECHNICAL, EUROPEAN BROADCASTING UNION. BRUSSELS, BE, Nr. 262, 21. Dezember 1994 (1994-12-21), Seiten 50-57, XP000494769 ISSN: 0251-0936 * |
ERKKILA V ET AL: "DAB FIELD TRIALS IN FINLAND DIGITAL AUDIO BROADCASTING" EBU REVIEW- TECHNICAL, EUROPEAN BROADCASTING UNION. BRUSSELS, BE, Nr. 261, 21. September 1994 (1994-09-21), Seiten 28-35, XP000486551 ISSN: 0251-0936 * |
LAU A ET AL: "FIRST RESULTS OF FIELD TESTS WITH THE DAB SINGLE FREQUENCY NETWORK IN BAVARIA" EBU REVIEW- TECHNICAL, EUROPEAN BROADCASTING UNION. BRUSSELS, BE, Nr. 261, 21. September 1994 (1994-09-21), Seiten 4-27, XP000486550 ISSN: 0251-0936 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014127612A1 (zh) * | 2013-02-22 | 2014-08-28 | 中兴通讯股份有限公司 | 角度确定***和方法 |
US10145933B2 (en) | 2013-02-22 | 2018-12-04 | Xi'an Zhongxing New Software Co., Ltd. | Angle determining system and method |
Also Published As
Publication number | Publication date |
---|---|
DE59813492D1 (de) | 2006-05-24 |
EP0893893B1 (de) | 2006-04-19 |
DE19731664C1 (de) | 1999-04-29 |
EP0893893A3 (de) | 2004-01-21 |
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