EP2693668B1 - Récepteur radio - Google Patents

Récepteur radio Download PDF

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Publication number
EP2693668B1
EP2693668B1 EP13177043.0A EP13177043A EP2693668B1 EP 2693668 B1 EP2693668 B1 EP 2693668B1 EP 13177043 A EP13177043 A EP 13177043A EP 2693668 B1 EP2693668 B1 EP 2693668B1
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EP
European Patent Office
Prior art keywords
reception state
determination unit
broadcasting
broadcasting signal
radio receiver
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.)
Active
Application number
EP13177043.0A
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German (de)
English (en)
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EP2693668A1 (fr
Inventor
Tomoya Hamaguchi
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.)
Alpine Electronics Inc
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Alpine Electronics Inc
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Publication date
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Publication of EP2693668A1 publication Critical patent/EP2693668A1/fr
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Publication of EP2693668B1 publication Critical patent/EP2693668B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/12—Arrangements for observation, testing or troubleshooting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]

Definitions

  • the present invention relates to a radio receiver that receives broadcasting signals of Radio Data System (RDS) or the like.
  • RDS Radio Data System
  • an FM radio receiver including an RDS data receiving function is known.
  • Such FM radio receiver starts alternative frequency (AF) search when determining that a current reception state is not good, and performs control similar to a bandwidth automatic changing operation that is performed at a normal reception when adjacent channel interference occurs in a destination channel (control for changing a bandwidth in accordance with reception electric-field intensity).
  • the FM radio receiver performs control for fixing the bandwidth to a wide reference bandwidth when the adjacent channel interference does not occur (refer to JP 2009-105729 A , for example). By performing such control, a bit error rate in a weak electric field state in the AF search can be improved.
  • JP 2009 105729 A porposes to fix the bandwidth of a band-pass filter which band-limits an intermediate frequency signal to a wide bandwidth in a state of no adjacent-channel interference during the AF search without reference to whether receiving electric field intensity is large or small. Namely, the bandwidth is narrowed during normal reception for a weak electric field even in the absence of adjacent-channel interference to remove weak electric field noise, but widened during the AF search. Thus, the bandwidth is widened in the weak electric field state to improve a bit error rate of the AF search, thereby suitably detecting a PI code.
  • DE 42 39 759 A1 discloses a method which involves using an intermediate frequency (IF) amplifier whose bandwidth is changed-over in dependence on interference signals, whose frequencies are outside a useful channel especially for frequencies of neighbouring channel signals.
  • the changeover switching condition contains a changeover criterion, derived from the reception quality of the RDS system, and a second changeover criterion.
  • the resulting IF wide band changeover criterion, carried out over a certain time period, are evaluated.
  • the second changeover criterion includes the time period of such conditions, in which the IF bandwidth is limited.
  • An object of the present invention is to provide a radio receiver capable of performing appropriate switching to a broadcasting station of an alternative frequency in a short time.
  • a radio receiver is a radio receiver that receives a first broadcasting signal on which alternative frequency data including information on a frequency of a broadcasting station which broadcasts a program the same as a program corresponding to the first broadcasting signal being received is superposed.
  • the radio receiver comprises: a front end configured for receiving the first broadcasting signal and converting the first broadcasting signal into an intermediate frequency signal; a bandpass unit configured for receiving the intermediate frequency signal output from the front end and allowing a component of the intermediate frequency signal included in a predetermined pass-band width to pass; a reception state determination unit configured for determining a reception state of the first broadcasting signal being received; a bandwidth determination unit configured for determining a pass-band width of the bandpass unit in accordance with the reception state determined by the reception state determination unit; and an alternative broadcasting station determination unit configured for receiving a second broadcasting signal specified by information on a frequency represented by the alternative frequency data.
  • the alternative broadcasting station determination unit is configured for determining a reception state of the second broadcasting signal while the pass-band width of the bandpass unit is set to the pass-band width determined by the bandwidth determination unit in accordance with the reception state of the first broadcasting signal.
  • the bandwidth determination means described above may set a wider pass-band width of the bandpass means as the reception state determined by the reception state determination means is better.
  • the pass-band width of the bandpass means is set in accordance with the reception state of the broadcasting signal being received before the reception state of the alternative frequency broadcasting station is determined, a period of time to be used for an AF search operation may be reduced when compared with a case where a pass-band width is changed in accordance with reception states of alternative frequency broadcasting stations. Furthermore, since the pass-band width of the bandpass means is variably set in accordance with the reception state of the broadcasting signal being received before the AF search operation is performed, the AF search operation may be performed while adjacent channel interference or the like is eliminated as appropriate, and appropriate switching to an alternative frequency station may be performed.
  • the reception state determination means may select one of a plurality of reception state levels categorized according to signal levels, and the bandwidth determination means may determine a pass-band width corresponding to the reception state level selected by the reception state determination means. Since a reception state determination and a pass-band width determination may be performed by selecting one of a plurality of candidates, the determination operations and the operation of setting the pass-band width of the bandpass means may be simplified.
  • the radio receiver may further include switching means for performing switching from the broadcasting signal being received to a broadcasting signal specified by frequency information represented by the alternative frequency data when the reception state determined by the alternative broadcasting station determination means is better than the reception state determined by the reception state determination means.
  • switching to a broadcasting signal corresponding to a better reception state may be performed taking the reception state of the broadcasting signal being received into consideration. For example, when the reception state of the broadcasting signal being received is good, switching may be performed only when there is a broadcasting signal of an alternative frequency corresponding to a reception state that is better than the reception state of the signal being received.
  • a broadcasting signal of an alternative frequency may be searched for while a value corresponding to a reception state serving as a reference for switching is reduced.
  • the alternative frequency data described above may be included in a broadcasting signal of Radio Data System.
  • the alternative frequency data required for the operation of the present invention may be easily obtained.
  • the front end may have a single tuner configuration for receiving a single broadcasting signal. Accordingly, when the single tuner configuration in which a background process is not allowed to be performed is employed, an AF search operation may be performed in a short time and switching to a broadcasting station of an alternative frequency may be swiftly performed.
  • the radio receiver may further include audio output means for outputting audio corresponding to the broadcasting signal being received and making an output be in a mute state when the alternative broadcasting station determination means performs a determination operation.
  • audio output means for outputting audio corresponding to the broadcasting signal being received and making an output be in a mute state when the alternative broadcasting station determination means performs a determination operation.
  • each of the reception state determination means and the alternative broadcasting station determination means may be performed in accordance with an intensity of the intermediate frequency signal, presence or absence of occurrence of multipath interference, and presence or absence of occurrence of adjacent channel interference.
  • a determination of a reception state of a broadcasting station of an alternative frequency may be performed while adjacent channel interference is eliminated by narrowing the pass-band width of the bandpass means, and such a broadcasting station may be selected as a switching destination.
  • the radio receiver may be installed in a vehicle.
  • the alternative broadcasting station determination means may perform an operation of determining a reception state of a broadcasting station of an alternative frequency at predetermined intervals or when a reception state of the broadcasting signal being received is deteriorated.
  • a broadcasting station of an alternative frequency may be reliably searched for and switching to the broadcasting station may be performed while a broadcasting signal in which a reception state thereof varies in accordance with traveling of the vehicle is received.
  • Fig. 1 is a diagram illustrating a configuration of the radio receiver according to the embodiment.
  • the radio receiver illustrated in Fig. 1 which is installed in a vehicle and which receives RDS broadcasting includes an antenna 10, a front end (F/E) 12, an intermediate frequency amplifier (IFA) 14, a bandpass filter (BPF) 15, a bandwidth setting unit 16, a reception state detector 17, a demodulation unit 20, an amplifier 22, a speaker 24, an RDS decoder 30, a controller 40, an AF list storage unit 50, a display unit 60, and an operation unit 62.
  • the radio receiver has a single tuner configuration which receives a single broadcasting signal.
  • a signal of 57 kHz as a third- order harmonic of a stereo pilot signal of 19 kHz is used as a subcarrier
  • the subcarrier is amplitude-modulated by a data signal which has been filtered and biphase-encoded and which indicates data of program information or traffic information so that radio data (RDS data) is obtained
  • RDS data radio data
  • Fig. 2 is a diagram illustrating a configuration of basic baseband coding of RDS data.
  • the RDS data is composed of a group of 104 bits, the group includes four blocks (A, B, C, and D), and each of the blocks includes an information word of 16 bits (m0 to m15) and a check word and an offset word (C'0 to C'9) of 10 bits.
  • the block A includes a program identification (PI) code that is program identification data representing a network and including country name data and program data.
  • the block B includes a traffic program identification (TP) code that is traffic information broadcasting station identification data representing a traffic information broadcasting station which broadcasts a traffic information program and a program type (PTY) code that is program identification data representing a type of program.
  • the block C includes data associated with frequencies of stations included in a network station group which are broadcasting the same program, that is, the block C includes alternative frequency (AF) data.
  • the AF data includes reception frequencies of broadcasting stations which broadcast a program the same as that of a broadcasting signal being received.
  • the block D includes a program service (PS) code that is broadcasting station name data, such as a name of a broadcasting station or a name of a network.
  • PS program service
  • the F/E 12 extracts a desired broadcasting signal from among broadcasting signals received through the antenna 10, performs frequency transform, and generates an intermediate frequency (IF) signal corresponding to a broadcasting wave of the desired broadcasting signal.
  • IF intermediate frequency
  • the radio receiver of this embodiment has a one-tuner configuration and the F/E 12 receives only one broadcasting signal.
  • the IFA 14 amplifies the IF signal output from the F/E 12.
  • the BPF 15 performs band limitation on the input IF signal and allows a component corresponding to a set pass-band width to pass.
  • the bandwidth setting unit 16 variably sets a pass-band width of the BPF 15. For example, four pass-band widths are assumed in advance, and one of the four pass-band widths is selected and set as the pass-band width of the BPF 15.
  • Four pass-band widths may be set, that is, a "wide band”, a "middle band”, a "narrow band”, and an "extreme narrow band”.
  • the pass-band width is set to 200 kHz.
  • the pass-band width is set to 150 kHz.
  • the pass-band width is set to 120 kHz.
  • the "extreme narrow band” is set, the pass-band width is set to 90 kHz.
  • the reception state detector 17 detects a reception state of a broadcasting signal in accordance with the IF signal output from the BPF 15. For example, an intensity of the IF signal, presence or absence of occurrence of multipath interference, and presence or absence of occurrence of adjacent channel interference are detected as a reception state.
  • the demodulation unit 20 performs an FM demodulation process and a stereo demodulation process in accordance with the IF signal which has passed the BPF 15 and which has been subjected to the band limitation.
  • Data obtained after the FM demodulation includes RDS data including the PI code, the program identification data (TYP), and the alternative frequency (AF) data superposed thereon.
  • An audio signal obtained through the stereo demodulation performed by the demodulation unit 20 is amplified by the amplifier 22, and audio sound is output from the speaker 24.
  • the RDS decoder 30 restores the RDS data by performing a predetermined decoding process on the data obtained through the FM demodulation performed by the demodulation unit 20. Furthermore, the RDS decoder 30 detects an error of the RDS data while performing block synchronization and performs an operation of correcting the error. Note that, in general, the operation of detecting an error of the RDS data and correcting the error is different from the decoding process performed on the RDS data, and an error detection- and-correction unit is separately provided.
  • the controller 40 controls the entire radio receiver.
  • the controller 40 including a CPU, a RAM, and a ROM performs various operations by executing certain programs. For example, a channel selection operation and an alternative broadcasting station switching operation are performed under control of the controller 40.
  • the channel selection operation is an operation of selecting and receiving a program
  • the alternative broadcasting station switching operation is an operation of searching for another broadcasting station which is broadcasting the same program and performing switching to the broadcasting station when a reception state of a broadcasting signal being received is deteriorated. Therefore, the controller 40 includes a channel selection processor 41, an AF data obtaining unit 42, a reception state determination unit 43, bandwidth determination units 44A and 44B, an AF check processor 45, a switching determination unit 46, and a mute processor 47.
  • the channel selection processor 41 sets a reception frequency corresponding to the program to be received to the F/E 12.
  • the bandwidth determination unit 44A determines a pass-band width of the BPF 15 corresponding to the broadcasting signal being received in accordance with a result of the determination performed by the reception state determination unit 43 corresponding to the broadcasting signal being received.
  • a wide bandwidth 200 kHz, for example
  • the determined pass-band width is supplied to the bandwidth setting unit 16 which changes the pass-band width of the BPF 15.
  • the bandwidth determination unit 44B determines a pass-band width of the BPF 15 corresponding to a broadcasting signal which is a target of the AF check in accordance with a result of the determination performed by the reception state determination unit 43 corresponding to the broadcasting signal being received. Specifically, as the reception state of the broadcasting signal being received is good, the pass-band width of the BPF 15 is set wide whereas as the reception state of the broadcasting signal being received is poor, the pass-band width of the BPF 15 is set narrow.
  • the mute processor 47 makes the audio sound output from the speaker 24 be in a mute state by transmitting an instruction to the demodulation unit 20. Note that, instead of rapidly changing to the mute state, the mute processor 47 may perform a fade-out process on the output sound before the operation of the AF check processor 45 is performed, and may perform a fade-in process on the output sound after the operation is terminated.
  • Fig. 3 is a flowchart illustrating a procedure of an operation of performing the AF check by changing the pass-band width of the BPF 15 in accordance with a reception state of a broadcasting signal being received.
  • the reception state detector 17 detects a reception state of the broadcasting signal being received (in step S104). Furthermore, the reception state determination unit 43 determines whether the detected reception state is the most excellent state A (in step S106). In this embodiment, a reception state is categorized by four levels, that is, the most excellent state A followed by states B, C, and D in descending order of excellence of a reception state. When the reception state is A, the determination is affirmative in step S106. In this case, the bandwidth determination unit 44B sets the pass-band width of the BPF 15 to the "wide band" for the broadcasting signal to be subjected to the AF check, and the bandwidth setting unit 16 sets the pass-band width (in step S108) .
  • the reception state determination unit 43 determines whether the detected reception state is the second most excellent state B (in step S110). In the case of the reception state B, the determination is affirmative. In this case, the bandwidth determination unit 44B sets the pass-band width of the BPF 15 to the "middle band" for the broadcasting signal to be subjected to the AF check, and the bandwidth setting unit 16 sets the pass-band width (in step S112).
  • the reception state determination unit 43 determines whether the detected reception state is the poor state C (in step S114). When the reception state is C, the determination is affirmative. In this case, the bandwidth determination unit 44B sets the pass-band width of the BPF 15 to the "narrow band" for the broadcasting signal to be subjected to the AF check, and the bandwidth setting unit 16 sets the pass-band width (in step S116).
  • the bandwidth determination unit 44B sets the pass-band width of the BPF 15 to the "extreme narrow band" for the broadcasting signal to be subjected to the AF check, and the bandwidth setting unit 16 sets the pass-band width (in step S118).
  • the switching determination unit 46 instructs the F/E 12 to perform switching to the AF station, and the switching to the broadcasting signal of the alternative frequency is performed (in step S126).
  • the determination is negative in step S124, the switching to a broadcasting signal of an alternative frequency is not performed, the process returns to step S100, and the operation of receiving the broadcasting signal which has been received is performed again.
  • the pass-band width of the BPF 15 is set to the "wide band” which is the widest band and "middle band” which is the second widest band, respectively.
  • the reception state of the broadcasting signal being received is good or comparatively good, and therefore, switching to an AF station of the same level or more is performed if any.
  • the pass-band width of the BPF 15 is set to the "extreme narrow band" which represents the narrowest pass-band width. Specifically, the reception state of the broadcasting signal being received is too bad to listen to, and therefore, switching to a listenable AF station is performed if any, even if the AF station suffers from interference.
  • the pass-band width of the BPF 15 is set in accordance with a reception state of a broadcasting signal being received, and reception states of AF stations are determined. Accordingly, a period of time required for the AF search operation may be reduced when compared with a case where the pass-band width is changed in accordance with reception states of AF stations. Furthermore, since the pass-band width of the BPF 15 is variably set in accordance with a reception state of a broadcasting signal being received before the AF search operation is performed, the AF search operation may be performed while the adjacent channel interference or the like is eliminated where appropriate, and switching to an appropriate AF station can be performed.
  • reception state determination and the pass-band width determination may be performed by selecting one of a plurality of candidates (four types), the determination operations and the operation of setting the pass-band width of the BPF 15 can be simplified.
  • the present invention is not limited to the foregoing embodiment and various modifications may be made within the scope of the present invention.
  • the radio receiver which receives RDS broadcasting has been described as an example in the foregoing embodiment, the present invention may be applied to any radio receiver including a Digital Audio Broadcasting (DAB) receiver as long as the radio receiver can receive alternative frequency data.
  • DAB Digital Audio Broadcasting
  • the reception state is determined from four levels and the setting of the pass-band width is selected from the corresponding four levels in the foregoing embodiment, they may be determined and selected from a plurality of levels other than four levels.
  • a pass-band width of bandpass means is set in accordance with a reception state of a broadcasting signal being received before reception states of alternative frequency broadcasting stations are determined. Accordingly, a period of time required for an AF search operation may be reduced when compared with a case where the pass-band width is changed in accordance with reception states of alternative frequency broadcasting stations.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Claims (10)

  1. Récepteur radioélectrique qui reçoit un premier signal de radiodiffusion sur lequel sont superposées des données de fréquences alternatives englobant des informations concernant une fréquence d'une station de radiodiffusion qui diffuse un programme identique à un programme correspondant au premier signal de radiodiffusion en train d'être reçu, le récepteur radioélectrique comprenant :
    une extrémité avant (12) configurée pour la réception du premier signal de radiodiffusion et pour la conversion du premier signal de radiodiffusion en un signal de fréquence intermédiaire ;
    une unité de bande passante (15) configurée pour recevoir le signal de fréquence intermédiaire émis par l'extrémité avant et pour permettre le passage d'une composante du signal de fréquence intermédiaire incluse dans une largeur de bande prédéterminée ;
    une unité de détermination de l'état de réception (17, 43) configurée pour la détermination d'un état de réception du premier signal de radiodiffusion en train d'être reçu ;
    une unité de détermination de la largeur de bande (44B) configurée pour la détermination d'une largeur de bande réduite de l'unité de bande passante conformément à l'état de réception déterminé par l'unité de détermination de l'état de réception lorsque l'état de réception du premier signal de radiodiffusion est détérioré du fait de l'occurrence d'une interférence de canal adjacent ; et
    une unité de détermination d'une station de radiodiffusion alternative (16, 17, 45) configurée pour la réception d'un deuxième signal de radiodiffusion spécifié par des informations concernant une fréquence représentée par les données de fréquences alternatives ;
    caractérisé en ce que l'unité de détermination d'une station de radiodiffusion alternative (16, 17, 45) est configurée pour la détermination d'un état de réception du deuxième signal de radiodiffusion, tandis que la largeur de bande de l'unité de bande passante (15) est réglée à la largeur de bande réduite déterminée par l'unité de détermination de la largeur de bande (44B) conformément à l'état de réception du premier signal de radiodiffusion lorsque l'état de réception du premier signal de radiodiffusion est détérioré du fait de l'occurrence d'une interférence de canal adjacent.
  2. Récepteur radioélectrique selon la revendication 1, dans lequel l'unité de détermination de la largeur de bande règle une largeur de bande supérieure de l'unité de bande passante lorsque l'état de réception déterminé par l'unité de réception de l'état de réception est meilleur.
  3. Récepteur radioélectrique selon la revendication 2, dans lequel l'unité de détermination de l'état de réception sélectionne un niveau parmi plusieurs niveaux d'états de réception catégorisés en fonction de niveaux de signaux ; et
    l'unité de détermination de la largeur de bande détermine une largeur de bande correspondant au niveau d'état de réception sélectionné par l'unité de détermination de l'état de réception.
  4. Récepteur radioélectrique selon l'une quelconque des revendications 1 à 3, comprenant en outre :
    une unité de commutation (46) pour la mise en oeuvre d'une commutation pour passer du signal de radiodiffusion en train d'être reçu à un signal de radiodiffusion spécifié par les informations de fréquences représentées par les données de fréquences alternatives lorsque l'état de réception déterminé par l'unité de détermination d'une station de radiodiffusion alternative est meilleur que l'état de réception déterminé par l'unité de détermination de l'état de réception.
  5. Récepteur radioélectrique selon l'une quelconque des revendications 1 à 4,
    dans lequel les données de fréquences alternatives sont incluses dans un signal de radiodiffusion d'un système de radiodiffusion de données.
  6. Récepteur radioélectrique selon l'une quelconque des revendications 1 à 5,
    dans lequel l'extrémité avant possède une configuration du type à syntonisateur unique pour la réception d'un signal de radiodiffusion unique.
  7. Récepteur radioélectrique selon la revendication 6, comprenant en outre :
    une unité de sortie audio (20, 22, 24, 47) pour une sortie audio correspondant au signal de radiodiffusion en train d'être reçu et pour placer une sortie dans un état muet lorsque l'unité de détermination d'une station de radiodiffusion alternative met en oeuvre une opération de détermination.
  8. Récepteur radioélectrique selon l'une quelconque des revendications 1 à 7,
    dans lequel la détermination de l'état de réception mise en oeuvre par l'unité de détermination de l'état de réception et par l'unité de détermination d'une station de radiodiffusion alternative est mise en oeuvre en fonction d'une intensité du signal de fréquence intermédiaire, de la présence ou de l'absence de l'occurrence d'une interférence par trajets multiples, et de la présence ou de l'absence de l'occurrence d'une interférence de canal adjacent.
  9. Récepteur radioélectrique selon l'une quelconque des revendications 1 à 8, dans lequel le récepteur radioélectrique est monté dans un véhicule.
  10. Récepteur radioélectrique selon la revendication 9,
    dans lequel l'unité de détermination d'une station de radiodiffusion alternative met en oeuvre une opération de détermination d'un état de réception d'une station de radiodiffusion d'une fréquence alternative à des intervalles prédéterminés ou lorsqu'un état de réception du signal de radiodiffusion en train d'être reçu est détérioré.
EP13177043.0A 2012-08-03 2013-07-18 Récepteur radio Active EP2693668B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012172428A JP5964169B2 (ja) 2012-08-03 2012-08-03 ラジオ受信機

Publications (2)

Publication Number Publication Date
EP2693668A1 EP2693668A1 (fr) 2014-02-05
EP2693668B1 true EP2693668B1 (fr) 2018-07-11

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EP13177043.0A Active EP2693668B1 (fr) 2012-08-03 2013-07-18 Récepteur radio

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JP (1) JP5964169B2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112016007003B4 (de) * 2016-06-24 2019-09-12 Mitsubishi Electric Corporation Funkempfangsvorrichtung
CN111130671B (zh) * 2019-12-18 2021-08-27 惠州市德赛西威汽车电子股份有限公司 一种全球收音同步状态机、同步系统及方法

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
DE4239759C2 (de) * 1992-11-26 2001-08-16 Atmel Germany Gmbh Verfahren zum Umschalten auf eine empfangswürdige Alternativfrequenz eines RDS-Empfängers
JP3267802B2 (ja) * 1994-06-06 2002-03-25 パイオニア株式会社 受信局自動切換機能を備えた受信機
JP2009105729A (ja) * 2007-10-24 2009-05-14 Sanyo Electric Co Ltd Ｆｍラジオ受信機
EP2073409A1 (fr) * 2007-12-21 2009-06-24 Fujitsu Ten Limited Procédé de suivi de réseau et appareil de radio pour utilisation embarquée
JP2009200951A (ja) * 2008-02-22 2009-09-03 Panasonic Corp Ｒｄｓ受信機
JP2011114527A (ja) * 2009-11-26 2011-06-09 Clarion Co Ltd Ｆｍラジオチューナーのｉｆ帯域制御システム

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Title
None *

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JP5964169B2 (ja) 2016-08-03
EP2693668A1 (fr) 2014-02-05
JP2014033325A (ja) 2014-02-20

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