DE4204490B4 - Circuit arrangement for suppressing switching interference in antenna diversity - Google Patents
Circuit arrangement for suppressing switching interference in antenna diversity Download PDFInfo
- Publication number
- DE4204490B4 DE4204490B4 DE19924204490 DE4204490A DE4204490B4 DE 4204490 B4 DE4204490 B4 DE 4204490B4 DE 19924204490 DE19924204490 DE 19924204490 DE 4204490 A DE4204490 A DE 4204490A DE 4204490 B4 DE4204490 B4 DE 4204490B4
- Authority
- DE
- Germany
- Prior art keywords
- switching
- receiver
- diversity processor
- diversity
- processor
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
- H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0831—Compensation of the diversity switching process for non-uniform properties or faulty operations of the switches used in the diversity switching process
Abstract
Schaltungsanordnung zur Unterdrückung von Umschaltstörungen im Audiofrequenzbereich beim Empfang frequenzmodulierter Tonsignale mittels eines Mehrantennen-Scanning-Diversity-Systems, wobei ein Diversity-Prozessor, dem eingangsseitig die Antennensignale zugeführt sind, in der Nähe der Antennenanschlüsse angeordnet ist und ein Empfänger, der mindestens über eine Leitung mit dem Diversity-Prozessor verbunden ist, fern dem Diversity-Prozessor angebracht ist, welcher bei Vorliegen ungünstiger Empfangsbedingungen ein Schaltsignal zum Umschalten auf ein anderes Antennensignal erzeugt, mit einer Störunterdrückungsschaltung im Empfänger und dieser Schaltung Schaltpulse zugeführt sind, die im Diversity-Prozessor aus den Schaltsignalen zum Umschalten auf ein anderes Antennensignal abgeleitet sind, dadurch gekennzeichnet, daß zur Zuführung der Schaltpulse (16) die mindestens eine, Diversity-Prozessor (1) und Empfänger (4) verbindende Leitung mitbenutzt ist und daß durch Selektionsmaßnahmen im Diversityprozessor (1) und im Empfänger (4) sicher gestellt ist, daß durch die Mitbenutzung die Diversityfunktion unbeeinträchtigt ist.Circuit arrangement for suppressing switching disturbances in the audio frequency range when receiving frequency-modulated sound signals by means of a multi-antenna scanning diversity system, a diversity processor, to which the antenna signals are fed on the input side, being arranged in the vicinity of the antenna connections and a receiver which is connected at least via a line is connected to the diversity processor, remote is attached to the diversity processor, which generates a switching signal for switching to another antenna signal in the presence of unfavorable reception conditions, with a noise suppression circuit in the receiver and this circuit is supplied with switching pulses which are generated in the diversity processor Switching signals for switching to another antenna signal are derived, characterized in that the at least one line connecting the diversity processor (1) and receiver (4) is used to supply the switching pulses (16) and that by selection m Measures in the diversity processor (1) and in the receiver (4) ensure that the diversity function is unaffected by the shared use.
Description
Die Erfindung betrifft eine Schaltungsanordnung zur Unterdrückung von Umschaltstörungen im Audiofrequenzbereich beim Empfang frequenzmodulierter Tonsignale mit einem Mehrantennen-Scanning-Diversity-System mit einem Scanning-Diversity-Prozessor außerhalb des Empfängers, mittels Störunterdrückungsschaltungen im Empfänger, wobei dem Diversity-Prozessor eingangsseitig die Antennensignale zugeführt sind und der Diversity-Prozessor über mindestens eine Leitung mit dem Empfänger verbunden ist.The invention relates to a circuit arrangement for oppression of switching problems in the audio frequency range when receiving frequency-modulated audio signals with a multi-antenna scanning diversity system with a scanning diversity processor outside of the receiver, by means of Störunterdrückungsschaltungen in the receiver, the diversity processor on the input side the antenna signals supplied and the diversity processor via at least one line with the recipient connected is.
Anordnungen dieser Art sind bekannt
aus der
In der
Mit dem Umschaltvorgang ist im allgemeinen im
Hochfrequenzzweig ein Amplituden- und Phasensprung verbunden. Diese
Umschaltung kann bei nicht ausreichender Störunterdrückung zu hörbaren Schaltgeräuschen im
Niederfrequenzbereich führen. Deshalb
wird in der
Im Automobilbau führt die Menge von Kabelverbindungen zu großen Schwierigkeiten. Aus diesem Grund ist bei Verwendung von mehr als zwei Antennen, z.B. auf einer Heckscheibe eines Fahrzeugs, der Einsatz von getrennten Hochfrequenzleitungen zum Empfänger zu aufwendig. Es ist deshalb vorzuziehen, den Diversity-Prozessor in der Nähe dieser Antennen einzubauen und die notwendige Hochfrequenz- und Zwischenfrequenzverbindung zum Empfänger mit Leitungen herzustellen. Somit ist eine Steuerung der Störunterdrückungsschaltung aufgrund des räumlichen Abstandes zwischen Diversity-Prozessor und Empfänger nicht ohne weiteres möglich.In automotive engineering, the amount of cable connections leads too big Trouble. For this reason, when using more than two antennas, e.g. on a rear window of a vehicle, the use from separate high-frequency lines to the receiver too expensive. That is why preferable to install the diversity processor near these antennas and the necessary high frequency and intermediate frequency connection to the recipient to manufacture with cables. Thus, control of the noise suppression circuit due to the spatial The distance between the diversity processor and the receiver is not easily possible.
Aufgabe der Erfindung ist es deshalb, bei einer Anordnung der gattungsgemäßen Art Maßnahmen aufzuzeigen, mit denen der Leitungsaufwand bei solchen Schaltungsanordnungen zur Unterdrückung von Umschaltstörungen verringert werden kann.The object of the invention is therefore to show measures with which an arrangement of the generic type the line effort in such circuit arrangements to suppress switching noise can be reduced.
Diese Aufgabe wird bei einer Schaltungsanordnung gemäß Oberbegriff des Anspruchs 1 durch das Kennzeichen dieses Anspruchs gelöst.This task is done with a circuit arrangement according to the generic term of claim 1 by the characterizing part of this claim.
Die mit der Erfindung erzielbaren
Vorteile bestehen in der Mitbenutzung von bereits für die Funktionsfähigkeit
des Diversity-Systems erforderlichen Verbindungsleitungen zwischen
dem Diversity-Prozessor (
Ausführungsbeispiele der Erfindung sind in den folgenden Figuren dargestellt: Es zeigen:Embodiments of the invention are shown in the following figures:
In
Dies geschieht. im Fall des Rundfunkempfangs
(AM und FM) dadurch, daß über eine
erste Selektionseinrichtung (
Im Empfänger (
Die Schaltpulse (
In einer weiteren vorteilhaften Ausgestaltung der Erfindung werden die Schaltpulse nicht in die ZF-Leitung eingespeist sondern in die HF-Leitung. Dies ist vor allem dann zweckmäßig, wenn kein Rundfunkempfang, sonder Fernsehempfang angestrebt wird. In diesem Fall gestaltet sich die Einspeisung der Schaltpulse besonders einfach, da mittels Kombination von einfachen Tief- und Hochpaßschaltungen die erforderliche Selektionswirkung erreicht wird.In a further advantageous embodiment of the Invention, the switching pulses are not fed into the IF line but in the RF line. This is especially useful if no radio reception, but television reception is sought. In In this case, the supply of the switching pulses is particularly good simple because of the combination of simple low and high pass circuits the required selection effect is achieved.
Ein solcher Anwendungsfall ist z.
B. beim mobilen TV-Empfang gegeben, wobei dort die niedrigste Empfangsfrequenz
bei ca. 48 MHz liegt. Speist man daher die Schaltpulse hochohmig
in die HF-Leitung, so genügt
ein Hochpaß,
um die Schaltpulse vom Antennumschalter fernzuhalten, da das Spektrum
der Schaltpulse bis zu maximal einigen MHz reicht. Durch diese Maßnahme wird
auch verhindert, daß die
Schaltpulse nicht unzulässig über die
Antennen abgestrahlt werden. Über
die HF-Leitung (
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924204490 DE4204490B4 (en) | 1992-02-14 | 1992-02-14 | Circuit arrangement for suppressing switching interference in antenna diversity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924204490 DE4204490B4 (en) | 1992-02-14 | 1992-02-14 | Circuit arrangement for suppressing switching interference in antenna diversity |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4204490A1 DE4204490A1 (en) | 1993-08-19 |
DE4204490B4 true DE4204490B4 (en) | 2004-04-15 |
Family
ID=6451746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924204490 Expired - Lifetime DE4204490B4 (en) | 1992-02-14 | 1992-02-14 | Circuit arrangement for suppressing switching interference in antenna diversity |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4204490B4 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4441761A1 (en) * | 1994-11-23 | 1996-05-30 | Lindenmeier Heinz | Multi-antenna scanning diversity system for vehicles |
DE19538109A1 (en) * | 1995-10-13 | 1997-04-17 | Bayerische Motoren Werke Ag | Circuit arrangement for controlling an antenna diversity for an assigned radio device |
DE19603514C2 (en) * | 1996-02-01 | 2002-08-01 | Harman Becker Automotive Sys | Mobile radio reception system with antenna diversity |
DE19845534B4 (en) | 1998-10-02 | 2005-01-27 | Robert Bosch Gmbh | antenna circuit |
DE19910571A1 (en) * | 1999-03-10 | 2000-09-14 | Delphi Tech Inc | Radio receiving device |
DE10102616A1 (en) * | 2000-02-17 | 2001-08-23 | Heinz Lindenmeier | Antenna diversity system with phase-regulated summation of antenna signals has logic switch switched to different setting to change received signal paths if received signal noise detected |
EP1182800B1 (en) * | 2000-08-24 | 2009-04-15 | Continental Automotive GmbH | Antenna diversity receiving system |
DE102004047153B4 (en) * | 2004-09-29 | 2013-07-25 | Audi Ag | Circuit arrangement for controlling an antenna diversity system with an associated receiving device for a motor vehicle |
DE102005022872B4 (en) * | 2005-05-18 | 2008-02-21 | Siemens Ag | A method for hiding interfering signals in a radio receiving device with antenna diversity and radio receiving device |
DE102006055502A1 (en) * | 2006-11-24 | 2008-05-29 | Bayerische Motoren Werke Ag | Radio receiver system for motor vehicle, has HIFI amplifier supplied with direct current voltage, where voltage is applied from radio receiver to inner conductor of coaxial line |
DE102007017478A1 (en) | 2007-04-13 | 2008-10-16 | Lindenmeier, Heinz, Prof. Dr. Ing. | Receiving system with a circuit arrangement for the suppression of switching interference in antenna diversity |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2006578A (en) * | 1977-10-17 | 1979-05-02 | Secr Defence | Diversity Radio Receivers |
US4592093A (en) * | 1984-01-13 | 1986-05-27 | Sony Corporation | Super high frequency receiver |
DE3517247A1 (en) * | 1985-05-13 | 1986-11-13 | Gerhard Prof. Dr.-Ing. 8012 Ottobrunn Flachenecker | ANTENNA DIVERSITY RECEIVING SYSTEM FOR ELIMINATION OF RECEIVING ERRORS |
-
1992
- 1992-02-14 DE DE19924204490 patent/DE4204490B4/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2006578A (en) * | 1977-10-17 | 1979-05-02 | Secr Defence | Diversity Radio Receivers |
US4592093A (en) * | 1984-01-13 | 1986-05-27 | Sony Corporation | Super high frequency receiver |
DE3517247A1 (en) * | 1985-05-13 | 1986-11-13 | Gerhard Prof. Dr.-Ing. 8012 Ottobrunn Flachenecker | ANTENNA DIVERSITY RECEIVING SYSTEM FOR ELIMINATION OF RECEIVING ERRORS |
Also Published As
Publication number | Publication date |
---|---|
DE4204490A1 (en) | 1993-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licenses declared (paragraph 23) | ||
R071 | Expiry of right | ||
R071 | Expiry of right |