EP3228031A1 - Procédé et dispositif de réception d'un signal de radiodiffusion - Google Patents

Procédé et dispositif de réception d'un signal de radiodiffusion

Info

Publication number
EP3228031A1
EP3228031A1 EP15775462.3A EP15775462A EP3228031A1 EP 3228031 A1 EP3228031 A1 EP 3228031A1 EP 15775462 A EP15775462 A EP 15775462A EP 3228031 A1 EP3228031 A1 EP 3228031A1
Authority
EP
European Patent Office
Prior art keywords
signal
detected
field strength
broadcast signal
information
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
EP15775462.3A
Other languages
German (de)
English (en)
Other versions
EP3228031B1 (fr
Inventor
Manh-Thang Tran
Marcus Risse
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3228031A1 publication Critical patent/EP3228031A1/fr
Application granted granted Critical
Publication of EP3228031B1 publication Critical patent/EP3228031B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
    • H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas

Definitions

  • the present invention relates to a method for receiving a broadcast signal, to a corresponding device and to a
  • AM broadcast receivers that use the amplitude modulation as a modulation type, usually have a search function to set from a set reception frequency to the next receivable station and play.
  • the reception frequency can be increased or decreased by a fixed frequency step.
  • On the new reception frequency can now be checked, for example, whether a
  • Receive field strength is greater than a threshold value and if quality information indicating further disturbances are smaller than a threshold value. If all criteria are met, the search can be ended, with the current frequency being used for playback.
  • a broadcast signal can be understood to mean an amplitude-modulated signal, such as a long, medium or shortwave signal of a radio transmitter.
  • a signal quality of the broadcast signal for example, by a
  • a reference time can be understood to mean a time before the current time.
  • the step of reading in a predetermined rhythm may be repeatedly executed to read in a plurality of reference information, each reference information representing a signal quality of the broadcasting signal detected at a different reference timing.
  • the reference information for example, in a suitable memory, also called landscape memory, be maintained during a predetermined period of time and read from there in the step of reading.
  • the reading and receiving steps can be performed simultaneously or sequentially in any order.
  • the signal quality of the broadcast signal detected at the present time can be used, for example, in the step of checking
  • the threshold values used in this case can be chosen so that the broadcast signal has a sufficiently high quality of reproduction in a successful test.
  • the approach presented here is based on the knowledge that a signal quality of a receivable broadcast signal can be tested as a function of an earlier signal quality of the broadcast signal. As a result, fluctuations in the signal quality due to reception time can be detected and taken into account during the examination of the broadcasting signal. For example, by means of such a test, a search function of a radio receiver can be controlled such that at different reception times of the radio receiver
  • AM stations can be heavily dependent on the time of day. While daytime attenuation in the area of long, medium and short wave bands means that relatively few transmitters can be received during the day, significantly more transmitters can be received during twilight and at night. However, many of these transmitters can be affected by strong field strength loss, English fading, adjacent channel interference or other electromagnetic
  • Landscape memory stored signal information can be used to determine a respective reception quality of the transmitter.
  • Signal processing path next to a playback path are determined.
  • the method may be provided with a step of determining a check threshold using the reference information.
  • the signal quality detected at the present time can be compared with the test threshold value.
  • the signal quality detected at the present time can be checked in the step of checking if it exceeds the test threshold value.
  • a test threshold value can be understood as a reception field strength which the broadcast signal must at least have to be tested in the testing step.
  • the check threshold may vary depending on a number of receivable broadcast signals that exceed a certain field strength threshold and a particular one
  • Check threshold value can be prevented that broadcast signals that have a low signal quality from the outset and thus for a
  • the check threshold may be further determined using the additional
  • Reference information can be determined.
  • An additional broadcast signal can be understood to mean a broadcast channel deviating from the broadcast signal.
  • the signal quality of the additional broadcast signal can be either at the reference time or at a different additional
  • the test threshold value can be determined as a function of the general quality of the radio reception. For example, a low test threshold can be selected, if only a few good receivable
  • Broadcast signals are present, or a high test threshold value can be selected, if many well receivable broadcast signals are present.
  • the reference information can be in the step of reading a for
  • the reference information may be a detected at the reference time disturbance of the broadcast signal or a for
  • Reference time detected detected field strength of at least one adjacent signal of the broadcast signal Analogous to the reference information, the signal information in the step of receiving one at the current time detected reception field strength of the broadcast signal or, additionally or alternatively, detected at the current time disturbance of the broadcast signal or detected at the current time receiving field strength of the
  • a receive field strength can be understood as a measured value of a field strength with which the broadcast signal from a radio receiver, such as a long, medium or
  • a disturbance can be a measured value of the signal quality which represents a deterioration of the signal quality
  • Broadcasting signal or a signal interacting with the broadcast signal are understood.
  • a neighboring signal may be understood to mean a signal, such as an adjacent radio transmitter, whose frequency range is adjacent to or at least close to a frequency range of the broadcasting signal.
  • the signal quality of the broadcast signal can be determined comprehensively and with great accuracy.
  • the signal quality detected at the present time can also be checked using the further reference information.
  • the further reference information may represent a received field strength of the neighboring signal detected at the further reference time.
  • Reference time detected reception field strength of the neighboring signal are formed.
  • a difference between the field intensity mean value and the received field strength detected at the present time can be determined and compared with a predetermined difference value.
  • a Field strength mean can be understood, for example, an arithmetic, geometric or harmonic mean. This can be a one
  • Reception quality of the broadcast signal impairing neighboring signal can be detected.
  • a deviation between the reception field strength detected at the reference time and the reception field strength detected at the current time is determined.
  • the deviation can be compared with a predetermined deviation value.
  • a variation of the respective reception strengths can be determined.
  • a field strength variation of the broadcasting signal can be detected.
  • the perturbation mean can be compared to a given perturbation value.
  • the difference value, the deviation value or the disturbance value may be determined as a function of a
  • Deviation value and the disturbance value be higher than at low speed. As a result, a consistently good playback of the broadcast signal can be ensured even at different speeds.
  • the method may be provided with a step of reproducing the broadcast signal.
  • the step of reproducing may be performed if, in the step of checking, the field strength average is greater than the difference detected at the current time at most
  • the approach described here also provides an apparatus for receiving a broadcast signal, the apparatus comprising the following features: a read-in unit for reading in reference information about a signal quality of the broadcast signal detected at a reference time; a receiving unit for receiving signal information about a signal quality of the broadcast signal detected at a current time; and a check unit for checking the signal quality detected at the present time using the signal information and the reference information by one
  • a device can be understood as meaning an electrical device which processes sensor signals and outputs control and / or data signals in dependence thereon.
  • the device may have an interface, which may be formed in hardware and / or software.
  • the interfaces can be part of a so-called system ASIC, for example, which contains a wide variety of functions of the device.
  • the interfaces are their own integrated circuits or at least partially consist of discrete components.
  • the interfaces may be software modules that are present, for example, on a microcontroller in addition to other software modules.
  • Program code which may be stored on a machine-readable medium or storage medium, such as a semiconductor memory, a hard disk memory or an optical memory, and for carrying out, implementing and / or controlling the steps of the method according to one of the above
  • Fig. 1 is a block diagram of a device according to an embodiment of the present invention.
  • FIG. 2 shows a schematic representation of a receiving system with a device according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method according to a
  • Fig. 1 shows a block diagram of a device 100 according to a
  • the apparatus 100 for receiving a broadcast signal comprises a read-in unit 102, a receiving unit 104 and a test unit 106.
  • the read-in unit 102 is designed to transmit a reference information 108 via a to a
  • the receiving unit 104 is designed to receive signal information 110 via a signal quality of the broadcast signal detected at a current point in time.
  • the test unit 106 is configured to receive the information 108, 110 and, using the information 108, 110, to check the signal quality detected at the present time. For example, the test unit 106 is configured to detect the current time
  • Receiving unit 104 via separate interfaces or a common interface with a suitable receiver for receiving the
  • the read-in unit 102 or the receiving unit 104 is designed to accommodate the
  • Receiving unit 104 is formed to receive each of the broadcast signal from the
  • Receive receiver and using the broadcast signal to generate the reference information 108 and the signal information 110 itself.
  • the device 100 has a coupled to the receiving unit 104 and the test unit 106
  • Detection unit 112 which is designed to use the reference information 108 to determine a test threshold value 114 and to send this to the test unit 106.
  • the detection work 112 in FIG. 1 is coupled to the read-in unit 102 to supply the signal information 108
  • the test unit 106 is designed to detect the signal quality of the broadcast signal detected at the present time,
  • Test threshold value 114 the current signal quality is checked by further test criteria by the test unit 106, as described in more detail below. If, on the other hand, the current signal quality lies below the test threshold value 114, then the test of the broadcast signal is interrupted by the test unit 106.
  • the test unit 106 is configured to respond in response to a successful
  • a playback device coupled to the device 100 may be configured to encode the playback signal 116 receive and reproduce the broadcast signal using the reproduction signal 116.
  • the read-in unit 102 may be configured to transmit at least one further reference information 118 via one to another
  • Reference time each represent a time preceding the current time.
  • the determination unit 112 may be configured to receive the additional reference information 120 from the read-in unit 102 and to further use the additional threshold value
  • the test unit 106 may be configured to receive the further reference information 118 from the read-in unit 102 and to further check the current signal quality of the broadcast signal using the further reference information 118.
  • Fig. 2 shows a schematic representation of a receiving system 200 with a
  • the device 100 is, for example, a device as described with reference to FIG. 1.
  • the receiving system 100 may be part of a radio receiver.
  • the radio receiver may be suitable for use in a vehicle.
  • the receiving system 200 may also be used with more than two
  • the signal processing paths 202, 204 are configured to process amplitude modulated signals.
  • the reproduction path 202 has a high-frequency processing unit 206, which is designed to supply a high-frequency signal as a broadcast signal 208 to process.
  • the high-frequency processing unit 206 the high-frequency processing unit 206
  • broadcast signal 208 is filtered, mixed and amplified.
  • the reproduction path 202 comprises a signal processing block serving as a demodulation unit 210, which is connected to the
  • High frequency processing unit 206 is coupled to the
  • Another signal processing block of the playback path 202 functions as an information providing unit 212 which is configured to provide information about a channel field strength, also called reception field strength, as well as other signal quality indicative values such as a
  • the second signal processing path 204 comprises a further high-frequency processing unit 214, another one
  • the apparatus 100 is designed to provide control software for controlling the signal processing paths 202, 204
  • the device 100 reads in the
  • Information providing units 212, 218 determined values. These values may include the reference information 108, 118, 120 as well as the signal information
  • the device 100 controls the
  • the device 100 can be realized with a so-called landscape memory, in which for each AM receive frequency a plurality of entries are stored via a respective receive field strength and respective fault information together with a time information.
  • a so-called landscape memory in which for each AM receive frequency a plurality of entries are stored via a respective receive field strength and respective fault information together with a time information.
  • Landscape memory configured to store ten different entries for each AM receive frequency. Are for a particular AM Receiving frequency already ten entries available, then the oldest value is overwritten to enter a new value.
  • the device 100 controls the second signal processing path 204 to pass through the AM receive frequencies supported by the radio receiver in a fixed timing scheme, or when not required for other tasks.
  • the reception field strength and the interference information for each set AM receive frequency are entered together with a time stamp in the landscape memory.
  • the apparatus 100 reads the landscape memory at a fixed rhythm.
  • the device 100 can be designed to determine the test threshold value for an AM search depending on a number of those transmitters which exceed a certain field strength threshold and fall below a certain interference threshold. If the landscape memory contains only a few receivable stations, the test threshold value will be set correspondingly low. If, however, many stations are receivable well, then the test threshold value for an AM search depending on a number of those transmitters which exceed a certain field strength threshold and fall below a certain interference threshold. If the landscape memory contains only a few receivable stations, the test threshold value will be set correspondingly low. If, however, many stations are receivable well, then the test threshold value for an AM search depending on a number of those transmitters which exceed a certain field strength threshold and fall below a certain interference threshold. If the landscape memory contains only a few receivable stations, the test threshold value will be set correspondingly low. If, however, many stations are receivable well, then the test threshold value for
  • the device 100 is configured to promptly activate the second signal processing path 204 in response to starting an AM search by a user of the broadcast receiver. Thereby, a search of a current receiving frequency of the reproducing path 202, also called a playback receiving or reproducing signal path, is activated in a direction defined by the user. The determined
  • the device 100 After a short delay, the device 100 now also starts an AM search in the reproduction path 202. At each reception frequency, a current value of the reception field strength and current quality values, for example a disturbance of the reception frequency or a reception field strength of adjacent reception frequencies, are determined. If the received field strength is below the determined check threshold value, which can also be referred to as the search threshold, the device 100 sets the next receive frequency. The test is now carried out again. If the reception field strength of the next reception frequency lies above the determined check threshold value, the device 100 checks all entries of the landscape memory for the set reception frequency as well as the entries for the respectively adjacent channels. Only those entries are considered, the one
  • the device 100 now checks one or more of the following criteria.
  • the device 100 checks whether a variation of the received field strengths stored in the landscape memory, including the currently determined reception field strength, is less than a predetermined deviation threshold value.
  • the device 100 checks whether a mean interference level in the
  • device 100 checks to see if a field strength average of the
  • the device 100 may be configured to control the respective threshold values for the above-mentioned criteria in dependence on a driving speed of the vehicle. If the vehicle is stationary, the thresholds for the field strength variation and the disturbance information can be set low. If the vehicle moves, the threshold values can be increased accordingly.
  • the first criterion determines whether a station with a high field strength fluctuation is received at the current reception frequency. Is this the Case, the current reception frequency is not reproduced.
  • the second criterion evaluates averaged fault information, which allows a more accurate image than a single measurement. Via the third criterion, stations with a very strong adjacent channel are suppressed, since reception problems due to the adjacent channel are to be expected here.
  • the apparatus 100 stops the AM search on the reproduction path 202 and outputs the set one
  • FIG. 3 shows a flowchart of a method 300 according to FIG.
  • Embodiment of the present invention The method 300 for
  • Receiving a broadcast signal for example, by a device, as described with reference to Figures 1 and 2, are performed.
  • the method 300 can be used for
  • Method step 302 first read in reference information about a detected at a reference time signal quality of the broadcast signal.
  • signal information about a signal quality of the broadcast signal detected at a current time is received.
  • Steps 302, 304 may be simultaneous or arbitrary
  • the signal quality detected at the present time is checked by using the signal information under reference information to determine a reproduction quality of the broadcast signal.
  • steps 302, 304 a are identical to steps 302, 304 a.
  • Reception field strength of the broadcast signal a disturbance of the broadcast signal or a reception field strength of at least one adjacent signal of the
  • Broadcast signal are read as information about a signal quality of the broadcast signal.
  • an exemplary embodiment comprises an "and / or" link between a first feature and a second feature, then this is to be read so that the embodiment according to one embodiment, both the first feature and the second feature and according to another embodiment either only first feature or only the second feature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

L'invention concerne un procédé de réception d'un signal de radiodiffusion. Une première étape du procédé consiste à lire une information de référence (108) relative à une qualité du signal de radiodiffusion enregistré par rapport à un moment de référence. Une autre étape du procédé consiste à recevoir une information de signal (110) relative à une qualité du signal de radiodiffusion enregistré par rapport à un moment réel. Enfin, une troisième étape du procédé consiste à vérifier la qualité du signal enregistré par rapport au moment réel en utilisant l'information du signal (110) et l'information de référence (108), afin de définir une qualité de reproduction du signal de radiodiffusion.
EP15775462.3A 2014-12-05 2015-10-09 Procédé et dispositif pour recevoir un signal de radiodiffusion Active EP3228031B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014225043.9A DE102014225043A1 (de) 2014-12-05 2014-12-05 Verfahren und Vorrichtung zum Empfangen eines Rundfunksignals
PCT/EP2015/073334 WO2016087099A1 (fr) 2014-12-05 2015-10-09 Procédé et dispositif de réception d'un signal de radiodiffusion

Publications (2)

Publication Number Publication Date
EP3228031A1 true EP3228031A1 (fr) 2017-10-11
EP3228031B1 EP3228031B1 (fr) 2020-05-06

Family

ID=54256759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15775462.3A Active EP3228031B1 (fr) 2014-12-05 2015-10-09 Procédé et dispositif pour recevoir un signal de radiodiffusion

Country Status (4)

Country Link
EP (1) EP3228031B1 (fr)
CN (1) CN107005321B (fr)
DE (1) DE102014225043A1 (fr)
WO (1) WO2016087099A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4352976B2 (ja) * 2004-04-20 2009-10-28 株式会社日立製作所 受信装置及び受信方法
US7711033B2 (en) * 2005-04-14 2010-05-04 Telefonaktiebolaget Lm Ericsson (Publ) SIR prediction method and apparatus
JP2006323973A (ja) * 2005-05-20 2006-11-30 Matsushita Electric Ind Co Ltd 信号処理装置及び方法
EP2187530A4 (fr) * 2007-08-24 2011-12-28 Mitsubishi Electric Corp Récepteur de radiodiffusion

Also Published As

Publication number Publication date
WO2016087099A1 (fr) 2016-06-09
DE102014225043A1 (de) 2016-06-09
EP3228031B1 (fr) 2020-05-06
CN107005321A (zh) 2017-08-01
CN107005321B (zh) 2019-10-15

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