CN1179657A - Information receiving system and control method therefor - Google Patents
Information receiving system and control method therefor Download PDFInfo
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- CN1179657A CN1179657A CN 97119504 CN97119504A CN1179657A CN 1179657 A CN1179657 A CN 1179657A CN 97119504 CN97119504 CN 97119504 CN 97119504 A CN97119504 A CN 97119504A CN 1179657 A CN1179657 A CN 1179657A
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Abstract
An information or broadcast receiving system and a control method therefor are provided for preventing a switch noise generated during the switching of antennas of a receiver provided with a plurality of switchable antennas from deteriorating a receptive state of another receiver. When a detector 62 of a main controller 3 detects that a radio 1 is receiving an AM broadcast, a signal output device 63 causes an FM multiplex receiver 2 to stop the switching of a main antenna 31 and an auxiliary antenna 32 by a diversity circuit 33 and to select the main antenna 31.
Description
The present invention relates to a kind of information receiving system that adopts diversity receiving method, be specifically related to a broadcast receiver system according to diversity receiving method, this broadcast receiver system specifically is equipped with the wireless device that can receive AM (amplitude modulation) broadcasting and is used to receive and comprises the FM multiplex receiver of transport information at interior FM (frequency modulation) multiplexing broadcast, the invention still further relates to a kind of method that is used for control information receiving system (especially broadcast receiver system) simultaneously.
Some current auto-navigation system is such, comprise transport information---the FM multiplexing broadcast of for example traffic administration, traffic jam and traffic accident, receive by the FM multiplex receiver, and be displayed on as character information or pictorial information and be installed in the automobile near the display unit the operator's seat.
Owing to the received FM broadcasts radio waves of FM multiplex receiver is to send the automobile that arrives reception through the multiple path by reflection such as building, mountain (multipath) from a broadcasting station, so the reception problem of " multipath distortion " in the FM broadcasts radio waves, can occur being known as.Therefore, adopt a kind of diversity receiving method to receive the FM multiplexing broadcast, it can select the antenna with satisfied accepting state to reduce multi-path influence by switch ground from a plurality of antennas.
When on vehicle such auto-navigation system being installed, this FM multiplex receiver is installed into adjacent to each other being in the same place with a wireless device that can receive AM broadcasting.Leaked out from the antenna of FM multiplex receiver by the noise that antenna produced that switches the FM multiplex receiver, and be added on the signal that wireless device receives, this noise just has been added among the speech of this wireless device output as a result.In addition, just as is generally known, AM broadcasting is amplitude modulation, it is just than the easier The noise that is subjected to acting on the amplitude of FM broadcasting like this.Therefore the The noise that is produced by switched antenna is bigger when receiving FM broadcasting when receiving AM broadcasting.
It is a kind of that to be used to reduce the prior art that antenna switches the influence of wireless device be such, be about to switch pulse that an instruction antenna switches and be input to one by the integrating circuit of forming by an electric capacity and resistance and be used for diode that antenna is switched, so that reduce noise by rising and the decline that takes over seamlessly pulse.(Japanese unexamined patent publication NO.56 (SHO)-168440)
Utilization is disclosed prior art in above-mentioned publication, and the noise that produces during switched antenna can be reduced greatly, but can not eliminate fully.Therefore, when wireless device be installed in apart from the receiver that adopts this prior art very near local time, for example in same car, if its antenna is switched when wireless device receives AM broadcasting, the AM tuner is easy to be subjected to The noise above-mentioned so.Therefore, the influence of the AM tuner even the noise level that can have been reduced, the result is that this noise is joined unintentionally in the output speech.
An object of the present invention is to provide a kind of information receiving system and be used for a kind of control method of this system, they can make the influence of the switching noise that the receiver that is equipped with a plurality of switchable antennas produced when switched antenna be unlikely to worsen the accepting state of another receiver.
According to the present invention, a kind of information receiving system is provided, comprising:
First receiver that is used to receive first information radio wave;
One second receiver comprises a plurality of antennas and selects the antenna selection apparatus with antenna of satisfied accepting state with being used for from a plurality of antennas;
Be used to detect the checkout gear of the reception of first receiver; And
Switch arresting stop, be used for when checkout gear detects the reception of first receiver, stop the switching of the antenna that undertaken by antenna selection apparatus.
Like this, can eliminate by second receiver, specifically be the FM multiplex receiver, and the switching noise that produces between transfer period at antenna makes first receiver receive the AM information broadcast better to the influence of first receiver.
According to a kind of preferred embodiment, first receiver comprises a wireless device that is used to receive AM broadcasting or AM information wireless electric wave, and/or wherein second receiver is applicable to reception FM multiplexing broadcast or FM multiplexed information.
Preferably, first receiver can switch between first receive mode or state (specifically being AM broadcast reception mode) and second receive mode or state (specifically being FM broadcast reception mode).
More preferably, checkout gear detects the receive mode of first receiver, and wherein switch arresting stop when checkout gear detects first receiver and is in first receive mode, specifically be when being in AM broadcast reception mode, just to stop the switching of antenna by antenna selection apparatus.
According to the present invention, a kind of control method that is used for the control information receiving system also further is provided, particularly according to the present invention, this system comprises second receiver that one first receiver and comprise a plurality of antennas and is used for selecting from a plurality of antennas the antenna selection apparatus of an antenna with satisfied accepting state; This method comprises the steps:
Read signal from first receiver;
Differentiate that first receiver is in first receive mode or accepting state or second receive mode or accepting state;
When first receiver is in first receive mode, forbid or stop the switching of antenna by antenna selection apparatus; Perhaps
When first receiver is in second receive mode, allow or make it to carry out the switching of antenna by antenna selection apparatus.
According to a preferred embodiment of the invention a, it forbids that step comprises that setting one from a plurality of antennas regularly presets antenna.
Preferably, described permission step comprises with the antenna selection apparatus switched antenna in second receiver.
More preferably, forbid in the step, when detecting first receiver reception AM broadcasting, forbid by the antenna selection apparatus switched antenna described.
According to a kind of preferred embodiment, a kind of broadcast receiver system comprises:
First receiver that is used to receive first broadcasts radio waves;
One second receiver comprises a plurality of antennas and selects the antenna selection apparatus with antenna of satisfied accepting state with being used for from a plurality of antennas;
Be used to detect the checkout gear of the reception of first broadcast receiver system; And
Switch arresting stop, be used for when checkout gear detects first receiver in reception, stop the switching of the antenna that undertaken by antenna selection apparatus.
Therefore, in the first receiver receiving course, the switching of second receiver antenna is stopped.The influence of the switching noise that produces in the time of can preventing by the second receiver switched antenna like this causes the deterioration of the first reception accepting state.
Preferably, this broadcast receiver system can comprise:
A wireless device that is used to receive the AM broadcasts radio waves;
One second receiver comprises a plurality of antennas and selects the antenna selection apparatus with antenna of satisfied accepting state with being used for from a plurality of antennas, and it is applicable to reception FM multiplexing broadcast;
Be used to detect the checkout gear that wireless device receives the AM broadcasts radio waves; And
Switch arresting stop, be used for when checkout gear detects radio in reception AM broadcasts radio waves, stopping the switching of the antenna that undertaken by antenna selection apparatus.
Therefore, when radio was receiving the AM broadcasting that is subject to the switching noise influence, the antenna switching of FM multiplex receiver was stopped.Like this, the influence of the switching noise that produces in the time of just can preventing by FM multiplex receiver switched antenna and in the AM broadcast singal that noise is input to receive, this AM broadcasting can be listened to satisfactorily.
A kind of control method that preferably is used for broadcast receiver system, this broadcast receiver system comprises that one first receiver and one comprise a plurality of antennas and is used for selecting from a plurality of antennas second receiver of the antenna selection apparatus of an antenna with satisfied accepting state, this control method is characterised in that, when detecting the reception of first receiver, the antenna switching of being undertaken by antenna selection apparatus is stopped.
The another kind of control method that preferably is used for broadcast receiver system, this broadcast receiver system comprises that wireless device, a He Yitai who is used for receiving the AM broadcasts radio waves comprises a plurality of antennas and is used for selecting the antenna selection apparatus of an antenna with satisfied accepting state and being suitable for receiving second receiver of FM multiplexing broadcast from a plurality of antennas, this control method is characterised in that, when detecting wireless device reception AM broadcasting, the antenna switching of being undertaken by antenna selection apparatus is stopped.
These and other purpose, characteristics and advantage of the present invention will become clearer by reading following detailed description and accompanying drawing, wherein:
Fig. 1 is the block diagram according to a kind of information receiving system of a kind of embodiment of the present invention;
Fig. 2 is the explanation flow chart that control stops and allowing antenna to switch in information receiving system.
Fig. 1 is according to a kind of information receiving system of one embodiment of this invention or the block diagram of broadcast receiver system.This broadcast receiver system as shown in Figure 1, is equipped with a wireless device 1, as first receiver, is used to receive AM information or AM broadcasting and/or FM information or FM broadcasting; A FM multiplex receiver 2, as second receiver, it adopts a kind of diversity receiving method especially, receives FM multiplexed information or FM multiplexing broadcast; And master controller 3.
This master controller 3 is in the type of receipt of monitoring wireless electricity equipment 1, and what just receiving by bus 4 monitoring wireless electricity equipment 1 is AM broadcasting or FM broadcasting or when having stopped receiving, by bus 5 control FM multiplex receivers 2.
Here, on behalf of wireless device 1, CPU22 promptly receiving AM information or AM broadcasting a signal, and perhaps FM information or FM broadcast, and perhaps stop the signal of situations such as receiving, export to master controller 3 by bus 4.
In the FM multiplex receiver 2 of so constructing, if its accepting state is worsened, for example, be subjected to multi-path influence, CPU45 detects this influence so, and 33 pairs of main antennas 31 of diversity circuit and auxiliary antenna 32 are switched, and so just selects an antenna with better accepting state.
CPU58 is to display unit 53 output navigation information and/or other information, and control FM multiplex receiver 2.CPU58 comprises a traveling-position controller 61, detector 62 (checkout gear) and signal output apparatus 63 (switching arresting stop).Traveling-position controller 61 will be confirmed the traveling-position by traveling-position detector 51 detected automobiles on the map in being stored in ROM56 and RAM57, if have with from operating unit 52 corresponding to signals, this traveling-position controller is just collected such as the such transport information of traffic jam information from the FM multiplexed signals that transmission-receiving circuit 55 sends so, and the information of collecting is outputed on the display unit 53 as navigation information with the accommodation road map.Detector 62 detects wireless device 1 and whether is receiving AM broadcasting based on the signal from receiving circuit 54.If detector 62 detects wireless device 1 and receiving AM when broadcasting, signal output apparatus 63 switches stop signal by bus 5 to antenna of the CPU45 of FM multiplex receiver 2 output so.
So the master controller 3 of structure is in wait state, by the battery continued power.When accessory switch was connected, the FM multiplex receiver obtained feed from battery, thereby is activated.
In the broadcast receiver system of above-mentioned structure, master controller 3 is control FM multiplex receiver 2 when whether continuous monitoring wireless device 1 is receiving AM broadcasting.When wireless device 1 was receiving AM broadcasting, antenna switched stop signal and is output to the FM multiplex receiver 2 from master controller 3.One receives this signal, and promptly when wireless device 1 was receiving AM broadcasting, the CPU45 of FM multiplex receiver 2 just stopped the switching of antenna with diversity circuit 33, and only allows main antenna 31 to receive.
Below, the control that stops and allowing antenna to switch is described with reference to Fig. 2.
At step S1, differentiate whether accessory switch is connected.If accessory switch is connected, then carry out step S2.And if accessory switch is for disconnecting, then step S1 will repeat till switch is switched on.
At step S2, be imported into CPU58 from the signal of wireless device 1 by bus 4, be used to detect wireless device 1 and be and receiving AM broadcasting or FM broadcasting or stop to receive.
At step S3, differentiate whether wireless device 1 is receiving AM broadcasting.If this equipment is receiving AM broadcasting, then carry out step 4, otherwise carry out step S5.
At step S4, antenna switches stop signal and is output to the FM multiplex receiver 2 from master controller 3, switches to stop antenna.At step S6, main antenna 31 is fixed and is set to selected antenna, and this program turns back to step S1 simultaneously.In addition, at step S5, stop to export antenna and switch stop signal, thereby allow switched antenna.Then, in step S7, if desired, the antenna in the FM multiplex receiver 2 is switched, and program is back to step S1 simultaneously.
Under the shown control of this flow chart, the control that antenna switches is carried out to S7 by reprocessing step S1.When wireless device 1 was receiving AM broadcasting, main antenna 31 was fixed and is set to reception antenna.If wireless device 1 does not receive AM broadcasting, then antenna is switched as required at step S7.
Said structure can be eliminated the influence to the wireless device 1 that receives AM broadcasting of switching noise that FM multiplex receiver 2 produces fully in the antenna handoff procedure.Therefore, AM broadcasting can be subjected to the influence of switching noise by satisfied listening to.
In addition, stopped automatically, do not sent instruction to stop the switching of antenna to FM multiplex receiver 2 so the operator does not need to operate this system because the antenna of FM multiplex receiver 2 switches in when wireless device 1 is receiving AM broadcasting.
Claims (8)
1. information receiving system comprises:
First receiver (1) that is used to receive first information radio wave;
One second receiver (2) comprises a plurality of antennas (31,32) and be used for selecting the antenna (31 with satisfied accepting state from a plurality of antenna (31,32); 32) antenna selection apparatus (33);
Be used to detect the checkout gear (22 of the reception of first receiver (1); 23; 54; 58); And
Switch arresting stop (3; 58; 55; 5; 41; 45), be used for when checkout gear (22; 23; 54; When 58) detecting the reception of first receiver (1), stop the antenna (31 that is undertaken by antenna selection apparatus (33); 32) switching.
2. according to a kind of information receiving system of claim 1, it is characterized in that, wherein first receiver (1) comprises a wireless device (1) that is used to receive AM broadcasting or AM information wireless electric wave, and/or wherein second receiver (2) is applicable to reception FM multiplexing broadcast or FM multiplexed information.
3. according to or a kind of information receiving system of omnibus claims of front, it is characterized in that wherein first receiver (1) can switch between first receive mode (specifically being AM broadcast reception mode) and second receive mode (specifically being FM broadcast reception mode).
4. according to a kind of information receiving system of claim 3, it is characterized in that wherein checkout gear (22; 23; 54; 58) detect the receive mode of first receiver (1), and wherein switch arresting stop (3; 58; 55; 5; 41; 45) at checkout gear (22; 23; 54; When 58) detecting first receiver (1) and be in first receive mode, specifically be when being in AM broadcast reception mode, just stop antenna (31 by antenna selection apparatus (33); 32) switching.
5. one kind especially according to the control method of the control information receiving system of of the front or omnibus claims, comprises one first receiver (1) He Yitai and comprises a plurality of antennas (31; 32) and be used for from a plurality of antennas (31; 32) select a antenna (31 in satisfied accepting state; Second receiver (2) of antenna selection apparatus 32) (33); This method comprises the steps:
Read (S2) signal from first receiver (1);
Differentiate that (S3) first receiver (1) is in first receive mode or accepting state or second receive mode or accepting state;
When first receiver (1) is in first receive mode, forbid (S4 by antenna selection apparatus (33); S6) antenna (31; 32) switching; Perhaps
When first receiver (1) is in second receive mode, allow (S6 by antenna selection apparatus (33); S7) carry out antenna (31; 32) switching.
6. according to a kind of method of claim 5, it is characterized in that, wherein forbid step (S4; S6) comprise from a plurality of antennas (31; 32) set one in regularly and preset antenna (31).
7. according to a kind of method of claim 5 or 6, it is characterized in that, wherein allow step (S5; S7) comprise with antenna selection apparatus (33) switched antenna (31 in second receiver (2); 32).
8. according to one or multinomial a kind of method of claim 5 to 7, it is characterized in that, wherein forbidding step (S4; S6) in, when detecting first receiver (1) reception AM broadcasting, forbid coming switched antenna (31 by antenna selection apparatus (33); 32).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 97119504 CN1179657A (en) | 1996-09-20 | 1997-09-19 | Information receiving system and control method therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP249774/96 | 1996-09-20 | ||
CN 97119504 CN1179657A (en) | 1996-09-20 | 1997-09-19 | Information receiving system and control method therefor |
Publications (1)
Publication Number | Publication Date |
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CN1179657A true CN1179657A (en) | 1998-04-22 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN 97119504 Pending CN1179657A (en) | 1996-09-20 | 1997-09-19 | Information receiving system and control method therefor |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7043269B2 (en) | 2001-02-26 | 2006-05-09 | Matsushita Electric Industrial Co., Ltd. | Communication card and communication device |
CN1316816C (en) * | 2003-12-22 | 2007-05-16 | 株式会社东芝 | Information processing equipment including receiver for receiving broadcasting data |
-
1997
- 1997-09-19 CN CN 97119504 patent/CN1179657A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7043269B2 (en) | 2001-02-26 | 2006-05-09 | Matsushita Electric Industrial Co., Ltd. | Communication card and communication device |
CN1316816C (en) * | 2003-12-22 | 2007-05-16 | 株式会社东芝 | Information processing equipment including receiver for receiving broadcasting data |
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