EP1476764A1 - Procede et dispositif pour controler au moins une antenne - Google Patents

Procede et dispositif pour controler au moins une antenne

Info

Publication number
EP1476764A1
EP1476764A1 EP03742513A EP03742513A EP1476764A1 EP 1476764 A1 EP1476764 A1 EP 1476764A1 EP 03742513 A EP03742513 A EP 03742513A EP 03742513 A EP03742513 A EP 03742513A EP 1476764 A1 EP1476764 A1 EP 1476764A1
Authority
EP
European Patent Office
Prior art keywords
noise signal
antenna
path
noise
signal
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.)
Withdrawn
Application number
EP03742513A
Other languages
German (de)
English (en)
Inventor
Jürgen Deininger
Bernd Gottschalk
Stefan Lindenmeier
Günter Reichert
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1476764A1 publication Critical patent/EP1476764A1/fr
Withdrawn legal-status Critical Current

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
    • H04B7/0822—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 according to predefined selection scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers

Definitions

  • the invention relates to a method and an arrangement for testing at least one antenna, in particular a multi-antenna system of a vehicle.
  • a functional test in the installed state of the antenna has so far been particularly complex and complex.
  • a circuit arrangement for the functional test of mobile radio reception systems is described in the installed state.
  • the disadvantage here is that, in order to generate a test signal, this comprises a calibrated signal generator which emits a discrete test signal exclusively at the frequency on which the receiver is tuned.
  • the circuit arrangement described there is not suitable for diagnosis taking external influences such as snow or ice into account.
  • a system for testing a signal transceiver such as a receiving antenna
  • a pseudo-noise signal source is used as the test signal source.
  • processing of a signal reflected on a damaged receiving antenna and a comparison with the original test signal is carried out by means of a complex circuit. leads.
  • a correlation receiver is required for this.
  • this system is very expensive to implement due to the use of the pseudo-noise signal source, which generates a fast digital signal, and the correlation receiver.
  • the invention is therefore based on the object of specifying a method for testing at least one antenna of a vehicle, in which a diagnosis is carried out on all frequencies of a band, e.g. Radio, TV, mobile radio, ISM band, inexpensively and in a particularly simple manner. Furthermore, a particularly simple arrangement for testing the antenna when installed is to be specified. In addition, it should also no longer be necessary to know the level of the test signal source, which makes it possible to use an inexpensive test signal source.
  • a band e.g. Radio, TV, mobile radio, ISM band
  • the noise signal transmitted between the antennas is analyzed and evaluated as an alternative or in addition to the noise signal reflected at the respective antenna inputs.
  • the noise signal is coupled into the antenna (s) from the uncalibrated noise source or test signal source by means of a coupling circuit and received by an adjacent antenna and in the test module, in particular in the receiver, e.g. Audio or video tuner, analyzed using a transmission matrix.
  • a simple, uncalibrated noise source which in the simplest case is formed by a source of the receiver itself, enables a particularly inexpensive and simple arrangement. In particular, the manufacturing effort is particularly low.
  • the arrangement requires little space and as a result, due to the integration of the test module e.g. into a vehicle, the use of the diagnostic or test procedure in the vehicle area can eliminate the need for complex test transmitters in production at the end of the line or in service.
  • a noise signal as a test signal
  • diagnosis of the antenna (s) covering all frequency bands is possible.
  • a test based on a noise signal also makes it possible to evaluate external influences on the functionality of the antenna (s), such as snow or other external interference signals, which lead to misdiagnosis in the conventional systems according to the prior art.
  • the antenna (s) can also be status and thus checked and monitored, for example, while a vehicle is in motion.
  • FIG. 1 schematically shows a circuit arrangement for checking the functionality of a multi-antenna system
  • FIG. 1 shows a circuit arrangement 1 for testing an antenna system 4, comprising several antennas 2, of a vehicle (not shown in more detail).
  • the antenna system 4 is in particular integrated into a window 6, eg rear window, side window, or rear window and / or side window (s) of the vehicle.
  • the circuit arrangement 1 comprises a receiver module 8 and a coupling module 10 arranged between the antennas 2 and the receiver module 8.
  • the antenna or coupling module 10 serves to couple a noise signal S. into the respective antenna 2 and into the receiver module 8, also called a tuner.
  • the receiver module 8 further comprises a test module 12 for determining an instantaneous transmission coefficient U v i on the basis of a relationship between the noise signal component S 'coupled via the antennas and the noise signal component Si transmitted directly from the noise source to the receiver.
  • the test module 12 comprises a transmission matrix 14 in which a reference transmission coefficient U v i norm (also called U vn - m ) describing the transmission behavior and / or the transmission path is stored for the respective antenna 2.
  • U v i norm also called U vn - m
  • the coupling module 10 also called an antenna module, comprises an uncalibrated noise source 18 and a controllable RF switch 20 as the diagnostic circuit 16.
  • the noise source 18 covers all frequency bands which can be detected in the receiver module 8.
  • the noise source 18 can be implemented in the form of a bipolar transistor in an amplifier circuit.
  • a calibrated noise source is not required in the diagnostic or test procedure proposed here. This means that a complex determination of the current frequency response of the component and temperature-dependent noise source 18 can be omitted.
  • the controllable RF switch 20 is designed, for example, in the form of switchover diodes. The number of switching diodes corresponds to the number of antennas 2, which are used in the diagnostic mode as transmitting antennas 2 (n). The number of transmit antennas 2 (n) used determines the evaluation reliability of the diagnosis.
  • the diagnostic circuit does not require any complex manufacturing costs, but can be accommodated on its circuit board surface, for example, by changing the layout of the antenna amplifier module.
  • the data evaluation in the tuner or receiver 8 can be implemented by expanding the software, additional hardware is not required.
  • the receiver module 8 and the coupling module 10 can be formed by a common module.
  • the individual modules can be implemented in software and / or hardware. The arrangement and combination of the individual modules can also vary depending on the specifications.
  • the switchover diodes are controlled with the aid of a digital counter 21.
  • a control signal DI transmits two voltage states from the receiver module 8 to the digital counter 21 at a low bit rate.
  • the control signal DI can be transmitted along an already existing RF cable in the same way as is already carried out when a given FM diversity circuit is activated.
  • the counter 21 switches one position so that all antenna branches A, B, ..., Z are switched through in succession.
  • the next positive edge causes the noise source 18 to be switched off or, alternatively, the state that no antenna branch A to Z is switched through.
  • the first antenna branch A is switched through again in a new diagnostic cycle.
  • At least two rear window antennas 2 are successively coupled as transmission antennas 2 (n) via the HF switch 20.
  • the functionality of the antennas 2 is preferably measured by measuring the near-field transmission between the antennas 2 sen.
  • the reference transmission coefficients Ü V i norm or factors for all possible couplings between the antennas 2 form the transmission matrix 14.
  • the current transmission coefficients Üvi are determined analogously to this using the transmission matrix 14 and compared with the reference transmission coefficients Ü v i norm .
  • the antennas 2 are used both as transmitting and receiving antennas.
  • the transmission path is determined by sending out the noise signal S via one of the antennas 2 as the transmitting antenna n and by receiving the resulting reception signal S 'at one of the other antennas 2 as the receiving antenna m or by reflection of the noise signal S at the antenna input of the relevant transmitting antenna n.
  • the evaluation using the transmission matrix 14 also expediently permits the detection of impairments, such as, for example, wetness, snow, and external interference signals which can affect several antennas 2.
  • the test or diagnosis is carried out in such a way that the transmission of the noise signal S from the respectively selected transmitting antenna 2 (n) to the other adjacent rear window antennas 2 forming the receiving antennas 2 (m) is checked in the receiver module 8, in particular for all frequency bands.
  • Each antenna 2 is thus checked for its transmission behavior U v for several frequency bands.
  • the FM band, the highest TV band and the AM band are expediently analyzed, as a result of which the function of the antennas 2 is checked and determined safely and easily on the basis of the transmission behavior U v .
  • the RF switch 20 does not leave any noise signal S on the antenna path 22 during normal antenna operation with the position 0.
  • the RF switch 20 is successively in the positions 1 and 2, the noise signal S is successively coupled onto the antenna paths 22 via coupling circuits 24, for example via T crossings or capacitively.
  • the noise signal S splits into the noise signal Si, which is led directly from the noise source 18 to the tuner 8, and the noise signal S 2, which migrates to the antenna 2 in question and is radiated on the antenna 2 .
  • the overall system can be represented by a transmission matrix 14 of maximum nx m.
  • the determination of the transmission matrix 14 for a level evaluation and the measurement tolerance to be expected are shown below with reference to FIG. 2. For example, given a multi-antenna system 4 with three antennas 2. However, the principle also applies to other systems 4 which comprise at least two antennas 2.
  • the signal levels Sn, S i2 and S ⁇ 3 are detected in each case. animals.
  • the noise signal S with the level P r (f) is coupled successively onto the signal paths 22 of the antennas 2. Part of the noise power is emitted via the antenna 2 connected in each case, while another part is conducted directly to the receiver module 8 via the respective filter amplifier circuit 26 of the path 22.
  • the level P r (f) of the noise source 18 does not have to be known before the measurement, since this can be determined from the measurement evaluation by means of the test module 12 in the receiver module 8. The measurement results in the diagnostic process are therefore independent of the tolerance of the noise source 18.
  • the assumed transmission coefficient or reference transmission coefficient Ü v i n ⁇ rm (f) / the filter amplifier circuit 26 with the lowest tolerance ⁇ v i and the actual transmission coefficient according to are used as the basis for determining the currently applied noise power P r
  • Pr (f) 2 Sn (f) / ((Ü vlnorm (f)) x (l + ⁇ vl (f))) [3]
  • the noise properties of the noise source 18 may thus be different and temperature-dependent for each component and need not be known from the start. This enables inexpensive production of simple noise sources 18.
  • the transmission coefficients Ü v2 (f) and Ü v3 (f) of the other filter amplifier circuits 26 can be determined from the signal levels S22 and S33, respectively.
  • the display tolerance of the receiver 8 is not included in this consideration, since the evaluation of the antenna system 4 is always related to its sensitivity. That If the sensitivity of the receiver 8 is high, the antenna system 4 may have correspondingly lower transmission properties. By means of the diagnostic system or the circuit arrangement 1, the required quality of the antenna system 4 is thus always evaluated as a function of the available tuner sensitivity, so that overall systems 1 (receiver 8 and antenna system 4) with the same quality are also evaluated equally.
  • the transmission coefficients Ü a not only provide information about the functionality of the antennas 2, but also about the extent to which the transmission path 28 between the antennas 2 is disturbing. If, for example, there is a blanket of snow on the antennas 2, all transmission coefficients Ü v i (f) are equally disturbed and the diagnostic algorithm recognizes that it is not an antenna 2 that is disturbed, but rather all transmission paths 28 are affected. Depending on the size of the instantaneous transmission coefficient U vi (f) determined, the state of the antennas 2 is inferred, for example the rear window 6 is covered with a foreign body.
  • FIG. 3 shows an alternative embodiment of the circuit arrangement 1, in which, in order to test the different frequency bands of the receiver module 8, the coupling module 16 by means of the positions 1 and 2 of the HF switch 20 for coupling the noise signal S to the relevant transmission branch 30 or 32 is intended for the FM band or AM band.
  • the circuit arrangement 1 shows a two-antenna system 4 for the AM and FM bands.
  • FIG. 4 shows a further embodiment of the circuit arrangement 1 for a five-antenna system 4 for the AM band and the FM band with 4-fold diversity.
  • the number of positions of the RF switch 20 for testing the FM band with diversity has been expanded by the corresponding number of antennas. The test procedure is carried out as already described above.
  • the noise signal S of the noise source 18 is coupled separately into each antenna 2 by means of the RF switch 20.
  • transmission coefficients U v i (f) relating to all possible combinations of the antennas 2 are determined and with the reference transmission coefficients Ü V i norm (f) of the transmission matrix 14 compared.
  • FIG. 5 shows an embodiment for a further diagnostic circuit Five antenna system 4, shown for a so-called high-end version for AM, FM and TV diversity.
  • cell phone and / or GPS antennas can also be tested for their functionality via broadband coupling with TV, AM and FM antennas. It does not matter how and where the individual antennas 2 are integrated in the vehicle.
  • the n-number antennas 2 are switched in succession as transmitting antennas. Depending on the number n of transmit antennas
  • a permissible value range is exceeded, one or more defective antennas 2 are / are determined using the transmission matrix 14.
  • the dynamic adaptation of the value ranges to the current reception situation advantageously analyzes and identifies external interference effects that affect several antennas 2, for example iced-up rear window 6, in the diagnosis.
  • Table 1 below shows an example of a transmission matrix 14 for an antenna system 4 with four antennas 2.
  • Ant n number of transmit antennas
  • Ant m number of receive antennas
  • TX transmitter
  • RX receiver
  • Pnm signal level
  • the transmission matrix 14 comprises, as information, level and / or frequency values which represent the reference transmission coefficient Ü V i norm and / or current transmission coefficient Ü v i for the antenna combination in question.
  • the current transmission coefficients Ü V i are compared with the reference transmission coefficients Ü v i norm of the respective antenna combination 2 (n, m).
  • reference knowledge is generated, on the basis of which a diagnosis can then take place.
  • a possible method for knowledge generation and evaluation is presented below. A diagnosis takes place in several steps:
  • FIG. 6 shows an example of a flow diagram of the diagnostic algorithm, which comprises the following steps:
  • a frequency or amplitude analysis can be used to identify an error in one or more antennas 2 or antenna combinations 2 (n, m).
  • the measurement and diagnosis procedure is explained below using an example.
  • the transmission behavior between different rear window antennas 2 in their near field is determined by means of a so-called network analyzer.
  • the noise signal S is coupled into the antennas 2 one after the other.
  • the vehicle roof, C-pillars and trunk lid with electrically connected sheet steel parts have been reproduced. Measurements were carried out for intact antennas 2 and for defective antennas 2, e.g. for an interruption of the window contacts and / or for an interruption of the antenna wires on the rear window 6. Furthermore, the influence of moisture on the transmission behavior was measured.
  • the transmit or noise signal S was coupled directly into the antenna 2, the antenna amplifier was unsoldered.
  • the transmission antenna 2 is therefore not adapted. If the transmission antenna 2 is fed in in an adapted manner, the transmission factors improve.
  • the values shown in the following tables are the S21 transmission coefficients in dB measured at 100 MHz (FM).
  • Transmission coefficients represent the transmission factor or transmission coefficient U v i between the antennas 2 coupled in each case over the near field.
  • the fault cases were brought about by interrupting the pane contacts, interrupting the pane antenna wires, influencing the near field of the antennas 2 by water on the pane and metal surfaces located in the near field of the antennas 2.
  • the instantaneous transmission coefficients U v ⁇ determined by means of the transmission matrix 14 are consistently better than -25dB, the anticipated necessary transmission powers for the near field transmission, measured in the conventional far field transmission-reception case, are very low.
  • the disk contacts at the connections to the antennas FM1 and TV3 were deteriorated or interrupted by inserting layers of paper of different thicknesses.
  • the antenna combination FM1 and TV3 normally has a transmission coefficient Ü v ⁇ of -22.37 dB.
  • Table 3 shows the influence of the weakness of contact on the transmission behavior through a significant change in the transmission coefficient U v currently determined by means of the transmission matrix 14.
  • the antennas 2 When the antennas 2 are checked further, they are checked for changes due to the action of water on the rear window 6 and other objects in the vicinity of the rear window 6 analyzed. As shown in Tables 5A and 5B, water sprinkling at 100 MHz has almost no influence on the transmission behavior. On the other hand, if objects, in particular conductive objects, are arranged close to the rear window 6, these changes are displayed in the diagnosis, since these have a significant influence on the transmission behavior of individual antenna pairs.
  • FIG. 7 An alternative embodiment of the circuit arrangement 1 is shown in FIG. 7.
  • the circuit arrangement 1 is designed for a single antenna system 4.
  • noise signal S instead of the evaluation of the transmitted from the transmitting to the receiving antenna 2 noise signal S is at a respective antenna input 42 reflected the individual antenna 2 noise signal S 2 analyzed by the emitted noise signal S ⁇ and evaluated. Since if the antenna 2 is damaged, its adaptation is disturbed, 42 reflections arise at its input.
  • the RF switch 20 does not allow any noise signal S from the noise source 18 onto the antenna path during normal antenna operation 22.
  • the RF switch 20 is in position 1.
  • the noise signal S is then coupled to the antenna path 22 via a coupling network 24, for example a T-element. There, the noise signal S cleaves in the guided directly from the noise source 18 to the receiver module 8 and the noise signal S x to the antenna 2 migratory and reflected by the antenna 2, noise signal S 2.
  • the static coupling circuit 24 is expanded by a switching function with additional positions 2 and 3 to the switchable coupling circuit 44, as shown in FIG.
  • switch position 2 the noise signal S is sent directly to the receiver 8 and detected there. Ie the antenna path 22 is open.
  • the frequency characteristic of the current noise signal Si is then known for the level evaluation and is stored.
  • Position 3 is then set by means of switchable coupling circuit 44 and antenna path 22 is thus closed. Now the frequency characteristic of the superposition of the noise signals Si and S 2 is detected in the level evaluation using the transmission matrix 14 and with the Frequency characteristic of the stored noise signal Si compared.
  • a superimposition of the noise signal Si with the noise signal S 2 reflected at a defined impedance Z 2 can also be measured and analyzed for the reference measurement of the noise signal Si, after which the frequency characteristic of the pure noise signal S is then calculated back ,
  • the associated circuit arrangement 1 is shown by way of example in FIG. 9.
  • the frequency characteristic of the illustrated embodiments in FIGS. 7 to 9 for single-antenna systems 4 is detected and analyzed in a relatively wide frequency band in order to ensure the best possible information about the functionality of the antenna 2, since damage to the antenna 2 occurs in the center frequency range f m in the superimposed noise signal S ⁇ + S 2 does not necessarily result in significant level changes.
  • a directionally selective coupling circuit 46 for example a directional coupler, is preferably used, as shown in FIG. Only the reflected signal S 2 is detected here, which has a substantially lower level than the noise signal Si in the case of the functioning antenna 2. A prerequisite for the level evaluation here is that the noise signal level Si is already known. A calibrated noise source 18 is required for this embodiment.
  • a directionally selective coupling network 48 with a switchable signal flow direction is used, as shown in FIG Figure 11 is shown.
  • a directional coupler with alternatively switchable inputs E1, E2 is provided, for example.
  • the noise signal S is directed to the antenna 2 via the directional coupler 48, reflected and detected as a signal S 2 in the level evaluation.
  • the noise signal S is passed via the directional coupler 48 directly to the level evaluation, where it is detected as a reference signal Si.
  • FIGS. 12 to 14 modifications of the arrangement according to FIG. 11 are shown below, in which a diagnosis using an uncalibrated, inexpensive noise source 18 is also possible.
  • uncalibrated always means that the transmission power of the noise source is not known and does not have to assume reproducible values and thus, for example, a strong temperature drift of the transmission power is permitted.
  • FIG. 11 only the differences in structure and function compared to FIG. 11 are discussed in more detail below.
  • a directionally selective coupling network 50 with a switchable signal flow direction is used in order to be able to use an inexpensive, uncalibrated noise source.
  • a directional coupler with alternatively switchable inputs is used in the embodiment according to FIG. 12.
  • an input is terminated with a 50 ⁇ resistor.
  • the embodiment according to FIG. 12 in contrast to the embodiment according to FIG. 11, has a modified filter amplifier circuit 26 'with a switchable amplifier.
  • a switch 49 is additionally formed, which in connection with the switchable amplifier for switching over the signal path from the noise source 18 via the antenna 2 to the receiver 8 Signal path from the noise source 18 directly to the receiver 8 and vice versa.
  • the noise signal S from the noise source 18 is passed via the directional coupler 50 directly to the level evaluation, where it is detected as a reference signal Si in order to be able to determine and calibrate the noise level.
  • the switchable amplifier 26 ' is switched off, ie switch position 4, in order to interrupt the signal path via the antenna 2 to the receiver 8.
  • an attenuator DG can be inserted in the path for a possible level reduction.
  • the noise signal S is passed to the antenna 2, reflected there and passed via the modified filter circuit 26 * in the antenna module 10 to the receiver 8, in which it is detected in the level evaluation as the signal S 2 .
  • the noise source 18 is switched off for normal operation.
  • FIG. 13 shows a modification of the embodiment according to FIG. 12, which can be used if it is not possible to use the modified filter circuit 26 v with a switchable amplifier, but only the filter circuit according to FIG. 11.
  • an additional one Switch 51 formed with switch positions 4 X and 5 V by which the switch positions 4 and 5 realized in FIG. 12 in the switchable amplifier of the modified filter circuit 26 x are replaced.
  • this additional switch By using this additional switch, the same function as described in connection with FIG. 12 can be achieved.
  • a noise generator 18 is used as the transmitter, which can be integrated into the antenna module 10.
  • the tuner or transceiver set in a diagnostic mode can serve as the receiver 8. This provides a particularly inexpensive transmitter. Since the receiver 8 is already present, the diagnostic function must be added to the software.
  • an additional antenna can be formed which, in contrast to the antenna 2, has no connection to the receiver module 8.
  • the noise signal S from the noise generator 18 is now coupled into this additional antenna.
  • the additional antenna then sends this noise signal to the antenna (s) 2.
  • the resulting reception signal S x or S 2 is received and evaluated by the test module 12 in the receiver module 8.
  • the present invention discloses the use of a very simple, inexpensive test signal source for antenna diagnosis. This is done in particular by using an economically favorable low-price noise signal source, the performance of which need not be known. Due to its wide signal spectrum, the noise source is suitable for testing antennas in several frequency bands, eg AM, FM, TV. By sequentially using a different antenna as the transmitting antenna, a transmission matrix can be created that represents the near field coupling between different antenna combinations. With the help of this transmission matrix, the signal power of the noise source or test signal source can be extracted. be librated. A simple, inexpensive test signal source can thus be used, the level of which, in contrast to all previous approaches, does not have to be known and not reproducible.
  • the transmission matrix is also used to calculate out external influences that affect all or more antennas, such as common single, snow or leaf coverings as well as external interference signals.
  • a directional coupler is used in a calibration circuit.
  • the reception level is measured for several switching positions in the arrangement on the tuner.
  • the performance of the low-price signal source can be determined or calibrated out from various level values.
  • This calibration circuit can of course also be used in the case of several antennas.
  • the present invention discloses a method for testing at least one antenna 2 with a receiver module 8 and a coupling module 16 arranged between the antenna 2 and the receiver module 8.
  • the antenna 2 and the receiver module 8 are supplied with a noise signal S as a test signal by means of the coupling module 16 .
  • a current transmission coefficient is then determined by superimposing the noise signal S, Si with a received signal SS 2 resulting from the noise signal S, Si and compared with a reference transmission coefficient stored in a transmission matrix.
  • an arrangement for carrying out the method according to the invention is also disclosed.

Abstract

La présente invention concerne un procédé pour contrôler au moins une antenne (2) comprenant un module de réception (8) et un module de couplage (16) monté entre l'antenne (2) et le module de réception (8). Le module de couplage (10) permet de fournir un signal de bruit (S) servant de signal de contrôle à l'antenne (2) et au module de réception (8). Un module de contrôle (12) permet de déterminer un coefficient de transmission instantané (UV), qui fournit le rapport entre un premier signal de bruit arrivant au module de contrôle (12) par une première voie (S, S1), sans passer par ladite antenne (2), et un second signal de bruit partant de la source de bruit (18) et arrivant au module de contrôle (12) par une seconde voie (S', S2) qui passe par ladite antenne (2), et de le comparer avec un coefficient de transmission de référence (Uvinorm) enregistré dans une matrice de transmission (14). La présente invention concerne également un dispositif permettant de mettre en oeuvre ledit procédé.
EP03742513A 2002-02-22 2003-02-11 Procede et dispositif pour controler au moins une antenne Withdrawn EP1476764A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10207487 2002-02-22
DE10207487 2002-02-22
PCT/EP2003/001314 WO2003071293A1 (fr) 2002-02-22 2003-02-11 Procede et dispositif pour controler au moins une antenne

Publications (1)

Publication Number Publication Date
EP1476764A1 true EP1476764A1 (fr) 2004-11-17

Family

ID=27740311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03742513A Withdrawn EP1476764A1 (fr) 2002-02-22 2003-02-11 Procede et dispositif pour controler au moins une antenne

Country Status (5)

Country Link
US (1) US20060082494A1 (fr)
EP (1) EP1476764A1 (fr)
JP (1) JP2005518172A (fr)
DE (1) DE10305741A1 (fr)
WO (1) WO2003071293A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107529692A (zh) * 2017-01-24 2018-01-02 中国人民解放军电子工程学院 一种基于相关熵稀疏表示的通信辐射源个体识别方法

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258367A1 (de) * 2002-12-12 2004-07-08 Daimlerchrysler Ag Mehrzielfähiges Verfahren und mehrzielfähige Sensorvorrichtung für die Abstands- und Winkelortung von Zielobjekten im Nahbereich
US7616968B2 (en) * 2004-03-23 2009-11-10 Mine Radio Systems Inc. System and method to facilitate overcoming a degradation in transmission through a radiating transmission line communication system
US20050260963A1 (en) * 2004-05-19 2005-11-24 Motorola, Inc. Receiver system and method for wideband self test
US7667467B2 (en) * 2004-08-06 2010-02-23 Bae Systems Information And Electronic Systems Integration Inc. Method and system for determining antenna characterization
US20060197538A1 (en) * 2005-03-07 2006-09-07 Nokia Corporation Self-test method for antennas
DE102006039357B4 (de) * 2005-09-12 2018-06-28 Heinz Lindenmeier Antennendiversityanlage zum Funkempfang für Fahrzeuge
DE102006030638A1 (de) * 2006-02-20 2007-08-23 Conti Temic Microelectronic Gmbh Diagnosevorrichtung
DE102007007357B4 (de) 2007-02-14 2018-06-21 Infineon Technologies Ag Integrierte Schaltungsanordnung
DE102007017478A1 (de) * 2007-04-13 2008-10-16 Lindenmeier, Heinz, Prof. Dr. Ing. Empfangsanlage mit einer Schaltungsanordnung zur Unterdrückung von Umschaltstörungen bei Antennendiversity
DE102008031068A1 (de) * 2007-07-10 2009-01-15 Lindenmeier, Heinz, Prof. Dr. Ing. Antennendiversityanlage für den relativ breitbandigen Funkempfang in Fahrzeugen
DE102007039914A1 (de) * 2007-08-01 2009-02-05 Lindenmeier, Heinz, Prof. Dr. Ing. Antennendiversityanlage mit zwei Antennen für den Funkempfang in Fahrzeugen
DE102008003532A1 (de) * 2007-09-06 2009-03-12 Lindenmeier, Heinz, Prof. Dr. Ing. Antenne für den Satellitenempfang
DE102008026849B4 (de) * 2008-06-05 2012-09-20 Siemens Aktiengesellschaft Verfahren und Prüfeinrichtung zur Feld-Qualitätsprüfung einer Magnetresonanz-Antennenanordnung sowie Magnetresonanzsystem und Magnetresonanz-Antennenanordnung
US7889123B1 (en) * 2008-08-28 2011-02-15 Rf Micro Devices, Inc. Global positioning system (GPS) assembly test using wireless transmission
PT2209221T (pt) * 2009-01-19 2018-12-27 Fuba Automotive Electronics Gmbh Sistema de recepção para a soma de sinais de antena em fase
DE102009011542A1 (de) * 2009-03-03 2010-09-09 Heinz Prof. Dr.-Ing. Lindenmeier Antenne für den Empfang zirkular in einer Drehrichtung der Polarisation ausgestrahlter Satellitenfunksignale
DE102009023514A1 (de) * 2009-05-30 2010-12-02 Heinz Prof. Dr.-Ing. Lindenmeier Antenne für zirkulare Polarisation mit einer leitenden Grundfläche
US8054221B1 (en) * 2010-11-15 2011-11-08 Apple Inc. Methods for testing satellite navigation system receivers in wireless electronic devices
DE102011118044A1 (de) 2011-11-09 2013-05-16 Conti Temic Microelectronic Gmbh Verfahren zur Steuerung eines Motors mittels Pulsweitenmodulation (PWM)
CN104753553B (zh) * 2013-12-26 2019-02-12 中兴通讯股份有限公司 一种提高射频链路收发性能的装置、移动终端及方法
DE102014223883B4 (de) 2014-11-24 2019-02-28 Sennheiser Electronic Gmbh & Co. Kg Mehrkanal-Drahtlosmikrofonsystem
FR3030949B1 (fr) * 2014-12-17 2020-11-27 Sagemcom Broadband Sas Procede de test mis en œuvre par un equipement comprenant au moins deux dispositifs de radiocommunication
CN105388466B (zh) * 2015-12-18 2017-11-17 中国电子科技集团公司第四十一研究所 T/r组件测试系统中发射激励信号的调理装置
CN107765103B (zh) * 2017-10-19 2019-07-23 西安电子科技大学 一种基于多传感器的复杂环境电磁态势反演方法
DE102019200470B4 (de) * 2019-01-16 2020-08-06 Vitesco Technologies GmbH Vorrichtung und Verfahren zur Funktionsprüfung eines Antennensystems zur Fremdmetallerkennung
JP7063412B2 (ja) 2019-02-28 2022-05-09 株式会社村田製作所 通信装置の受信感度測定方法およびそれを用いた通信装置のノイズ対策効果評価方法
CN109884406B (zh) * 2019-03-28 2021-02-23 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） 高频电磁屏蔽效能测量系统、测量方法及装置
CN109884407B (zh) * 2019-03-28 2021-02-23 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） 电磁屏蔽效能测量系统及测量方法
CN114125685B (zh) * 2022-01-26 2022-04-22 深圳粤讯通信科技有限公司 一种基于互联网的蓝牙耳机天线运行用数据处理系统
CN114966582B (zh) * 2022-07-29 2022-11-11 成都市克莱微波科技有限公司 一种微波收发组件自检方法及自检系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19618333A1 (de) * 1996-05-07 1997-11-13 Lindenmeier Heinz Schaltungsanordnung zur Funktionsprüfung mobiler Rundfunkempfangsanlagen
US6005891A (en) * 1996-08-13 1999-12-21 Chadwick; Raymond B. System for testing signal transmission/reception apparatus
US5949380A (en) * 1997-09-10 1999-09-07 Bird Electronic Corporation Antenna tester
DE29911541U1 (de) * 1999-07-02 1999-09-16 Fuba Automotive Gmbh Diagnosevorrichtung für eine Mehrantennenanordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03071293A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107529692A (zh) * 2017-01-24 2018-01-02 中国人民解放军电子工程学院 一种基于相关熵稀疏表示的通信辐射源个体识别方法

Also Published As

Publication number Publication date
DE10305741A1 (de) 2003-09-11
US20060082494A1 (en) 2006-04-20
JP2005518172A (ja) 2005-06-16
WO2003071293A1 (fr) 2003-08-28

Similar Documents

Publication Publication Date Title
EP1476764A1 (fr) Procede et dispositif pour controler au moins une antenne
EP1065509B1 (fr) Dispositif de diagnostique pour système à plusieurs antennes
EP0806849A2 (fr) Circuit pour le contrÔle du bon fonctionnement de systèmes de réception mobiles
EP2449689B1 (fr) Procédé de commutation de voies de signalisation, et groupe fonctionnel configuré à cette fin
WO2002041537A1 (fr) Systeme d'antennes
DE19627391C1 (de) Diagnoseverfahren und Diagnosesystem für Kfz-Antennenscheiben
WO2008107430A1 (fr) Appareil de commande pour la communication sans fil avec une unité périphérique
DE69935441T2 (de) Verfahren und anordnung zur prüfung einer empfangsantenne eines funksystems.
DE19845534B4 (de) Antennenschaltung
EP1256191B1 (fr) Procede de selection d'antennes d'un dispositif de reception dans un system radio, en particulier dans un system de telephonie mobile
EP2291933A1 (fr) Évaluation de la qualité de réaction dans des systèmes de communication
EP1701407A1 (fr) Système de réception à antennes multiples dans véhicules
DE10109359A1 (de) Diversity-Antennenanordnung
DE102005039526A1 (de) Verfahren und Diagnosevorrichtung zur selektiven Prüfung von Empfangsantennen in einem Mehrantennensystem
EP0508290A1 (fr) Dispositif d'ajustage des différents instruments individuels d'un système d'instrumentation
WO2012052085A1 (fr) Dispositif de mesure de l'intermodulation
DE102017206288A1 (de) Fahrzeug-zu-X-Kommunikationssystem
EP1198716B1 (fr) Circuit et procede pour le controle d'un systeme a diversite de commutation
EP1454807B1 (fr) Système de sécurité
EP2497291B1 (fr) Dispositif et procédé de mesure pour la mesure stationnaire de stations-relais de téléphonie mobile
EP4070127A1 (fr) Mesure au moyen d'un système de capteur ultrasonore dans un environnement à interférences
DE19603514A1 (de) Mobiles Funkempfangssystem mit Antennendiversity
EP2071732A1 (fr) Dispositif de commutation et procédé de transmission de signaux audio à fréquence modulée sur un récepteur FM avec Radio Data System (RDS)
DE102004059694B3 (de) Verfahren und Anordnungen zum Prüfen einer Antennenanordnung, insbesondere eines Kraftfahrzeuges
WO1998019358A1 (fr) Dispositif pour transformer l'impedance d'une antenne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040812

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20060928