EP1014481A1 - Procédé et dispositif d'alignement d'antenne - Google Patents

Procédé et dispositif d'alignement d'antenne Download PDF

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Publication number
EP1014481A1
EP1014481A1 EP99125145A EP99125145A EP1014481A1 EP 1014481 A1 EP1014481 A1 EP 1014481A1 EP 99125145 A EP99125145 A EP 99125145A EP 99125145 A EP99125145 A EP 99125145A EP 1014481 A1 EP1014481 A1 EP 1014481A1
Authority
EP
European Patent Office
Prior art keywords
antenna
signal
quality
image
digital
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
Application number
EP99125145A
Other languages
German (de)
English (en)
Other versions
EP1014481B1 (fr
Inventor
Gunnar Fogelstöm
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.)
Nokia Oyj
Original Assignee
Nokia Satellite System AB
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
Priority claimed from SE9804352A external-priority patent/SE512542C3/sv
Application filed by Nokia Satellite System AB filed Critical Nokia Satellite System AB
Publication of EP1014481A1 publication Critical patent/EP1014481A1/fr
Application granted granted Critical
Publication of EP1014481B1 publication Critical patent/EP1014481B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system

Definitions

  • the present invention relates to a method and a device for aligning the direction of an antenna connected to a receiver for digital signals.
  • Another solution to the said problem consists of using a signal indicator to show "signal-to-noise” (AGC, Automatic Gain Control), which is shown as a kind of rough adjustment via an indicator, after which BER was presented as a fine adjustment via another indicator.
  • AGC Automatic Gain Control
  • a dilemma of all the solutions for installing a satellite receiver today is that they do not offer a total solution for installing the receiver via a single signal indicator in one unified sequence from the receiver being unpacked to the antenna being aligned with the transmitting satellite.
  • the present invention relates to a method and a device for aligning the direction of an antenna connected to a receiver for digital signals in accordance with the enclosed independent claims.
  • the present invention specifies a method of aligning the direction of an antenna connected to a receiver for digital signals.
  • the antenna is aligned at the digital signals using a unified sequence of directions that include at least two methods for measuring the quality of a digital signal and that indicates the quality via one and the same means of indication regarding directions for both methods.
  • the first method measures that a digital signal is received, which is indicated on the said means, whereby the means having received the signal automatically switches to showing the quality of the digital signal using a second method.
  • the first method is AGC (Automatic Gain Control) and the second method is BER (Bit Error Rate).
  • the means of indication is a whole screen or occupies part of a screen.
  • An alternative embodiment of the invention comprises that the means is part of a portable unit.
  • the said scale comprise different colours in a field in the indicator, whereby the best signal quality is obtained when a specific colour occupies a specific field during the alignment of the antenna.
  • an image is called-up during the directions to prompt a user to carry out a unified alignment of the antenna.
  • the picture is partly transparent when an antenna alignment has been made so that a received digital channel appears whose digital signal contents are reproduced on the transparent part of the image.
  • the present invention specifies a device to align an antenna connected to a receiver for digital signals.
  • the device includes:
  • the device includes embodiments in accordance with the non-independent claims in the procedure according to that above.
  • Fig. 1 illustrates a flow scheme for aligning an antenna (in this case a parabolic dish) towards a transmitter according to the present invention.
  • Block or step 100 in Fig. 1 shows that a user of a satellite receiver calls-up a special image on their TV receiver for adjusting their antenna, with which the user is guided through the whole adjustment procedure in a unified sequence, via at least two methods for measuring the signal quality, with one and the same means as well as with the same scale for indicating the quality of the signal.
  • the user looks at the called-up page for antenna adjustment on the TV set. It is, however, not excluded that the user has a portable set with an indicator for signal quality according to the present invention, whereby the portable unit is remotely connected with the satellite receiver or TV set for acquiring signal quality information. It is even possible to obtain information via a cable between the portable unit and the other said units. Remote transmission takes place via well-known technology that is built on transmission of electromagnetic beams or ultrasound between connected units.
  • FIG. 2-5 in connection with a run through of Fig. 1, whereby the designations 1-4 in Fig. 1 (within so-called balloons) refer to Figs. 2-5 respectively.
  • step 110 in the adjustment procedure is taken if lock-on to the desired channel has not been achieved.
  • channel position 3 Astra® MTV has been selected for adjusting the antenna with the satellite Astra®.
  • a TV image 5 is acquired with the prompt to select 10 to "Select a predefined channel on ASTRA to be able to get a picture and check the signal strength", which is achieved with the signal quality indicator 20.
  • indicator 20 constitutes part of a screen image (TV picture) 5, whereby it shows the signal quality or strength in AGC according to 110 in Fig. 1.
  • the indicator is divided in to twenty fields, ten on either side of a distinct line in the middle 15.
  • the colour in the field immediately to the right of yellow 14 is green 16, and the colour in the field to the right of the green is blue/green 18.
  • the best signal quality that can be acquired with the indicator according to the invention is thus indicated when only field 19 shows the blue/green colour 18.
  • AGC Automatic Gain Control
  • signal amplification control is acquired though an AGC circuit that takes its power from either the IF (Intermediate Frequency) amplifier or the audio amplifier, i.e. IF-derived or Audio-derived amplification control respectively.
  • IF Intermediate Frequency
  • the AGC amplifier starts to decrease the amplification in the RF and IF steps in the electronics, whereby the level of the output audio signal in the loudspeakers is adjusted.
  • a well-designed AGC system achieves a uniform level for audio output signals.
  • the block or step 110 is maintained for alignment until the moment that the signal indication with AGC is acquired on indicator 20, which means that the antenna is "roughly” aligned with Astra® MTV from a digital point of view.
  • step 100 in Fig. 1 shows that the indication on the signal indicator 20 is acquired at the same moment (directly) without any special alignment step being performed, step 120 comes into play and step 110 thereby becomes unnecessary, which is also the case after AGC signal indication in step 110.
  • Step 120 in Fig. 1 is a condition box that describes the condition of the satellite receiver for deciding if the receiver has locked-on to a digital signal or not locked on to this. If the signal has been lost after step 110 has been performed, the receiver is conditioned to re-enter (NO) condition 110. If, however, the received digital signal is locked-on via AGC measurement, the receiver is switched to automatically begin measuring the signal quality with BER from the same indicator 20, see Fig. 3, which illustrates a television screen with BER signal quality indications in accordance with Fig. 1.
  • BER Bit Error Rate
  • Fig. 3 clarifies the signal quality in indicator 20 after the AGC measurement has been performed. It can be seen with the colour indications according to that above that the BER is still high because indicator 20 shows red colours 12 to the left in indicator 20 and blue/green 18 to the right. Better signal quality is acquired the further the blue/green colour 18 is located on the right. Ideally, this colour should only be found in field 19 for optimal quality according to the present embodiment of the invention.
  • the indicator 20 acquires a colour scheme in accordance with Fig. 4, which shows another television screen 5 with BER signal quality measurement in accordance with Fig. 1.
  • Fig. 4 shows the optimal signal quality for digital reception according to the present embodiment, which is seen in that only field 19 is blue/green 18, whereby the yellow colour 14 is essentially once again found in the centre of indicator 20 surrounded by red 12 to the left and green 16 to the right as seen by the viewer.
  • the receiver is now placed in the condition according to step 140 in the flow scheme according to Fig. 1 where it self-tunes to the pre-programmed channel MTV. If the channel is found, conditional step 150, the TV image 22 appears, as is evident from Fig. 5, which illustrates a television screen with a BER signal quality indicator 20 where a digitally processed TV image 22 is acquired in accordance with Fig. 1, whereby the condition in step 160 of the flow scheme then becomes active.
  • the user activates 170 the OK icon in Fig. 5 and the called-up image is switched off 180, whereby the tuned-in digital TV channel MTV appears and occupies the whole of the screen.
  • the present invention also relates to a device for aligning an antenna connected to a receiver for digital signals.
  • the device includes a means of indication 5, 20 for showing a unified sequence 10, 12-19 of directions when an antenna is aligned towards digital signals, and a means of detection in the receiver for detecting that a digital signal has been received by the receiver by measuring the quality of the signal according to a first method such as AGC. The quality is shown simultaneously on the means of indication 20.
  • the device includes a means of switching for switching from the first method to a second method for measuring the quality of the signal, whereby the switching takes place when a signal has been detected with certainty and the means of indication switches to showing the quality of the signal according to a second method.
  • a means of switching can be a program function that switches between, for example, two drive routines for a graphical reproduction of indicator 20 with scale 12-19 in AGC and BER.
  • the actual alignment of the antenna with the digital signal is allowed using indications on a scale 12-19 via a single means of indication 20 in a unified sequence on the means of indication.
  • the device allows embodiments in accordance with that specified in the method according to that stated above.

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Details Of Aerials (AREA)
  • Waveguide Aerials (AREA)
EP99125145A 1998-12-16 1999-12-16 Procédé et dispositif d'alignement d'antenne Expired - Lifetime EP1014481B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9804352 1998-12-16
SE9804352A SE512542C3 (sv) 1998-12-16 Förfarande och anordning för att rikta in en antenn

Publications (2)

Publication Number Publication Date
EP1014481A1 true EP1014481A1 (fr) 2000-06-28
EP1014481B1 EP1014481B1 (fr) 2002-11-13

Family

ID=20413684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125145A Expired - Lifetime EP1014481B1 (fr) 1998-12-16 1999-12-16 Procédé et dispositif d'alignement d'antenne

Country Status (3)

Country Link
EP (1) EP1014481B1 (fr)
AT (1) ATE227891T1 (fr)
DE (1) DE69903906T2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001022602A2 (fr) * 1999-09-21 2001-03-29 Matsushita Electric Industrial Co., Ltd. Appareil de demodulation dans la radiodiffusion numerique
US6683581B2 (en) 2000-12-29 2004-01-27 Bellsouth Intellectual Property Corporation Antenna alignment devices
US6789307B1 (en) 2000-12-29 2004-09-14 Bellsouth Intellectual Property Corporation Methods for aligning an antenna with a satellite
US6906673B1 (en) 2000-12-29 2005-06-14 Bellsouth Intellectual Property Corporation Methods for aligning an antenna with a satellite
US6937188B1 (en) * 2001-11-13 2005-08-30 Bellsouth Intellectual Property Corporation Satellite antenna installation tool
EP1746683A1 (fr) 2005-07-18 2007-01-24 Advanced Digital Broadcast S.A. Récepteur de signal et méthode d'alignement d'antenne pour la réception d'au moins deux signaux
CN105577903A (zh) * 2015-03-24 2016-05-11 宇龙计算机通信科技(深圳)有限公司 一种信号显示方法及移动终端

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548844A2 (fr) * 1991-12-20 1993-06-30 Sony Corporation Système de réception pour radiodiffusion par satellite
US5463403A (en) * 1992-07-10 1995-10-31 General Instrument Corporation Automatic adjustment of receiver apparatus based on channel-bit-error-rate-affected parameter measurement
EP0687029A1 (fr) * 1994-06-09 1995-12-13 Thomson Consumer Electronics, Inc. Procédé et dispositif pour l'alignement d'une antenne utilisant une tonalité audible

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548844A2 (fr) * 1991-12-20 1993-06-30 Sony Corporation Système de réception pour radiodiffusion par satellite
US5463403A (en) * 1992-07-10 1995-10-31 General Instrument Corporation Automatic adjustment of receiver apparatus based on channel-bit-error-rate-affected parameter measurement
EP0687029A1 (fr) * 1994-06-09 1995-12-13 Thomson Consumer Electronics, Inc. Procédé et dispositif pour l'alignement d'une antenne utilisant une tonalité audible

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6771318B1 (en) 1999-09-21 2004-08-03 Matsushita Electric Industrial Co., Ltd. Digital broadcasting demodulation apparatus with a direction adjustment indicator for the receiving antenna
WO2001022602A3 (fr) * 1999-09-21 2001-10-04 Matsushita Electric Ind Co Ltd Appareil de demodulation dans la radiodiffusion numerique
WO2001022602A2 (fr) * 1999-09-21 2001-03-29 Matsushita Electric Industrial Co., Ltd. Appareil de demodulation dans la radiodiffusion numerique
US6799364B2 (en) 2000-12-29 2004-10-05 Bellsouth Intellectual Property Corporation Antenna aligning methods
US6789307B1 (en) 2000-12-29 2004-09-14 Bellsouth Intellectual Property Corporation Methods for aligning an antenna with a satellite
US6795033B2 (en) 2000-12-29 2004-09-21 Bellsouth Intellectual Property Corporation Antenna alignment devices
US6683581B2 (en) 2000-12-29 2004-01-27 Bellsouth Intellectual Property Corporation Antenna alignment devices
US6889421B1 (en) 2000-12-29 2005-05-10 Bell South Intellectual Property Corp. Antenna system installation and tuning method
US6906673B1 (en) 2000-12-29 2005-06-14 Bellsouth Intellectual Property Corporation Methods for aligning an antenna with a satellite
US7102580B2 (en) 2000-12-29 2006-09-05 Bellsouth Intellectual Property Corp. Antenna alignment devices
US6937188B1 (en) * 2001-11-13 2005-08-30 Bellsouth Intellectual Property Corporation Satellite antenna installation tool
EP1746683A1 (fr) 2005-07-18 2007-01-24 Advanced Digital Broadcast S.A. Récepteur de signal et méthode d'alignement d'antenne pour la réception d'au moins deux signaux
CN105577903A (zh) * 2015-03-24 2016-05-11 宇龙计算机通信科技(深圳)有限公司 一种信号显示方法及移动终端
CN105577903B (zh) * 2015-03-24 2019-04-12 宇龙计算机通信科技(深圳)有限公司 一种信号显示方法及移动终端

Also Published As

Publication number Publication date
ATE227891T1 (de) 2002-11-15
EP1014481B1 (fr) 2002-11-13
SE9804352L (sv) 2000-04-03
DE69903906T2 (de) 2003-07-03
DE69903906D1 (de) 2002-12-19
SE512542C2 (sv) 2000-04-03
SE9804352D0 (sv) 1998-12-16

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