CN102545929A - WCDMA based automobile-mounted radio device - Google Patents
WCDMA based automobile-mounted radio device Download PDFInfo
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- CN102545929A CN102545929A CN2011104265934A CN201110426593A CN102545929A CN 102545929 A CN102545929 A CN 102545929A CN 2011104265934 A CN2011104265934 A CN 2011104265934A CN 201110426593 A CN201110426593 A CN 201110426593A CN 102545929 A CN102545929 A CN 102545929A
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Abstract
The invention provides a WCDMA (wideband code division multiple access) based automobile-mounted radio device which comprises a radio signal processing unit, a dynamic storing unit, a displaying unit, a radio signal digital-analog conversion unit, a radio outputting unit, a WCDMA unit, an antenna unit and a power supply managing unit. The dynamic storing unit, the displaying unit, the radio signal digital-analog conversion unit, the radio outputting unit and the WCDMA unit are all connected with the radio signal processing unit; the antenna unit is fixed on the rear glass of an automobile and connected with the WCDMA unit; the power supply managing unit is connected with both the WCDMA unit and the radio signal processing unit,. The WCDMA based automobile-mounted radio device can receive all the internet radio station information through the WCDMA unit, is less interfered, causes less distortion, has wide covering area and realizes the high-quality automobile-mounted wireless audio program requesting or replaying and broadcasting.
Description
Technical field
The present invention relates to a kind of vehicle-mounted audio signal reception device, relate in particular to a kind of vehicle-mounted audio signal reception device based on WCDMA.
Background technology
Existing vehicle-mounted audio signal reception device generally all is through the FM/AM antenna analog fm amplitude modulation radio set signal to be delivered to TUNER to handle; Then audio frequency is delivered to earphone or loudspeaker play back; To cause radio reception to be disturbed easily like this, the channel selection limited amount, and also its signal cover is smaller; Even also have the existing network sound receiving device of part to be based on the PC, but the network of its transmission is the IP cable network; Insert PC through RJ45 network interface card interface, then, radio station server is pushed to the audio stream medium on the PC through IP network; Decoding of use application program and audio player and channel selection are changed through sound card D/A then on the PC, audio frequency are delivered on loudspeaker or the earphone play back; But can not move, the scope of application is very limited, is not suitable for vehicle environment.
Summary of the invention
Technical problem to be solved by this invention is need provide under a kind of mobile environment, the vehicle-mounted audio signal reception device that also be not subject to disturb, available quantity is big, signal cover is wide.
To this, the present invention provides a kind of vehicle-mounted audio signal reception device based on WCDMA, comprising:
The radio reception signal processing unit;
Dynamic storage cell is connected with said radio reception signal processing unit;
Display unit is connected with said radio reception signal processing unit;
Radio reception signal D/A conversion unit is connected with said radio reception signal processing unit;
The radio reception output unit is connected with said radio reception signal processing unit through radio reception signal D/A conversion unit;
The WCDMA unit is connected with said radio reception signal processing unit through interface unit;
Antenna element is fixedly installed in behind the automobile on glassly, is connected with said WCDMA unit; And,
PMU is connected with the radio reception signal processing unit with said WCDMA unit respectively.
Wherein, said radio reception signal processing unit is connected with the WCDMA unit through interface unit, and interface unit can adopt USB interface, also can adopt the UART interface, the interface that said UART interface is connected with serial device for the control computer; The WCDMA unit is the third generation radio communication unit of Wideband Code Division Multiple Access WCDMA; Said WCDMA unit provides wireless network to the radio reception signal processing unit, at OS, under the ICP/IP protocol support that promptly Operating system provides; Through application program subelement and audio player etc.; Be connected to radio station server, download network station list and information thereof, and adopt display unit to realize that network radio station channel selection and relevant information show; Said display unit can adopt LCD display to realize visualization display and channel selection operation support; The present invention is kept at the radio flow medium of radio station server in the dynamic storage cell, then through audio decoder decode, converts analog signal to through radio reception signal D/A conversion unit again and realizes radio reception output; User vehicle can be heard the broadcast program of network radio station easily and quickly, can trans-regionally listen to local broadcast programs.
Existing vehicle-mounted audio signal reception device generally uses the FM/AM antenna, and what transmission channel adopted is the wireless simulation channel; Tonequality is not very desirable; Disturbed easily, can supply the quantity of channel selection very limited, and signal cover is smaller; Especially in remote rural area, mountain area or other signals cover bad place, then can not receive signal probably; Also there is legacy network audio signal reception device based on PC; But but need the support of IP basic network, can not move and listen to, volume is big; In addition; The device temperature of PC own, concussion characteristic can not satisfy the requirement of auto industry level, and therefore under automotive environment, the network sound receiving device is not well used.
In automobile, wireless use is very general, and existing vehicle-mounted radio reception all is to adopt the AM/FM mode to obtain the radio reception program, transmission be that analog signal is play; But the radius of action of automobile is increasing, and the covering of AM/FM signal often has limitation, and especially, existing automobile speed is increasingly high, and under high speed or speed change condition, the effect of AM/FM radio reception will descend greatly, has a strong impact on the radio reception quality.
In view of this, it is a kind of under high speed or variable-speed operation that the present invention provides, and can play the vehicle-mounted audio signal reception device with playback radio reception program preferably.
The present invention adopts the WCDMA unit to connect the WCDMA network, and the radio reception signal processing unit is connected with the WCDMA unit through interface unit, and interface unit can adopt USB interface; Also can adopt the UART interface, download, receive the digital signal of network radio station, and adopt the relevant information of dynamic storage cell storage; WCDMA unit bandwidth is enough wide, and transmitted data on network is fast, correspondingly; Interface unit adopts USB interface or UART interface, and the transmission data capacity is big, speed is fast, makes based on the vehicle-mounted audio signal reception device audio frequency of WCDMA more smooth; Transmission of digital signals is not allowed to be subject to disturb, and tonequality is better, and signal cover is wide; Under the trans-regional high-speed cruising, also can listen to each regional broadcast program, also can receive smoothness, high-quality broadcast singal, realize online request or playback broadcast audio program even the location is remote rural area or mountain area.
The existing WCDMA wide network coverage, the present invention adopts technique scheme, and its scope of listening to the radio reception program will less receive its position effects, and speed is fast; Signal is not subject to disturb, and, to the stability problem that receives at a high speed; The present invention also is provided with antenna element especially, has further improved the listening quality of vehicle environment, said antenna element; Adopt the antenna of lengthening, and can be fixedly installed in behind the automobile on glass, particularly in high-speed mobile or automobile variable speed; Strengthen the intensity that receives signal, reduced distorted signals, on glass after being attached to antenna simultaneously; Can effectively reduce the interference of concussion, realize high-quality wireless program request or playback broadcast audio program, trans-regionally also can listen to local broadcast programs signal.
Preferably, said radio reception signal processing unit adopts the CPU subelement, and said CPU subelement is connected with the WCDMA unit through interface unit, downloads the network radio station information that receives.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception signal processing unit adopts the CPU subelement; Said CPU subelement has operating system, is connected with the WCDMA unit through interface unit, can more fast and effeciently download the network radio station information that receives; Disposal ability is strong, and the upper strata audio decoder is used to strengthen audio decoder, also is convenient to realize better digital-to-analogue conversion and output.
Preferably, said dynamic storage cell adopts the DDR2 memory bar.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively, disturbs little; Distortion is few, and area coverage is wide, has realized high-quality onboard wireless program request or playback broadcast audio program; On this basis, said dynamic storage cell adopts the DDR2 memory bar, and the dynamic memory ability is strong; Audio frequency is more smooth, can either satisfy the dynamic memory demand of vehicle-mounted radio reception under the high-speed cruising, also can adapt to the demand of shaking characteristic.
Preferably, said DDR2 memory bar is the 1G memory bar.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said dynamic storage cell adopts the DDR2 memory bar of 1G; Can satisfy the dynamic memory of vehicle-mounted radio reception under the high-speed cruising and the demand of concussion characteristic; Simultaneously, also avoided the height of a certain device of simple pursuit to dispose and the waste resource, rationally controlled cost.
Preferably, said radio reception output unit comprises the esd protection subelement.
Wherein, ESD is the abbreviation of Electro-Static discharge, and said esd protection subelement is the subelement that is used to realize electrostatic discharge protection.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception output unit comprises the esd protection subelement; Before output, carry out electrostatic discharge protection and handle, guarantee the output of audio frequency reliable and stable ground, effectively get rid of the influence of static.
Preferably, said radio reception output unit also comprises the filtering interfering subelement.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; High-quality onboard wireless program request or playback broadcast audio program have been realized; Carry out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis, said radio reception output unit also comprises the filtering interfering subelement; The interference that the filtering audio-frequency information receives in processing procedure further guarantees the output of audio frequency reliable and stable ground.
Preferably, said filtering interfering subelement adopts 33pF electric capacity.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, carried out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis; Said radio reception output unit also comprises the filtering interfering subelement, and said filtering interfering subelement adopts 33pF electric capacity, adopts the effectively interference that in processing procedure, receives of filtering audio-frequency information of 33pF electric capacity; Avoid the sudden change and the interference of audio signal, further guarantee the output of audio frequency reliable and stable ground again.
Preferably, the working temperature of said radio reception signal processing unit, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, WCDMA unit, antenna element and PMU all is controlled to be-20 degrees centigrade to 70 degrees centigrade.
The present invention further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Carry out electrostatic discharge protection and filtering interfering processing before the vehicle-mounted radio reception output; Guarantee the output of audio frequency reliable and stable, realized high-quality onboard wireless program request or playback broadcast audio program, on this basis; The working temperature of said radio reception signal processing unit, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, WCDMA unit, antenna element and PMU all is controlled to be-20 degrees centigrade to 70 degrees centigrade; Be very suitable for the industrial temperature characteristic demand under the automotive environment, vehicle-mounted efficiently audio signal reception device is provided, greatly reduce its failure rate.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is that the network of the another kind of embodiment of the present invention connects sketch map;
Fig. 3 is the CPU subelement operation principle sketch map of the another kind of embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, more excellent embodiment of the present invention is done further detailed description:
Embodiment 1:
As shown in Figure 1, this example provides a kind of vehicle-mounted audio signal reception device based on WCDMA, comprising:
The radio reception signal processing unit;
Dynamic storage cell is connected with said radio reception signal processing unit;
Display unit is connected with said radio reception signal processing unit;
Radio reception signal D/A conversion unit is connected with said radio reception signal processing unit;
The radio reception output unit is connected with said radio reception signal processing unit through radio reception signal D/A conversion unit;
The WCDMA unit is connected with said radio reception signal processing unit through interface unit;
Antenna element is fixedly installed in behind the automobile on glassly, is connected with said WCDMA unit; And,
PMU is connected with the radio reception signal processing unit with said WCDMA unit respectively.
Wherein, said radio reception signal processing unit is connected with the WCDMA unit through interface unit, and interface unit can adopt USB interface; Also can adopt the UART interface, the WCDMA unit is the third generation radio communication unit of Wideband Code Division Multiple Access WCDMA, at present; The communication standard of the WCDMA just that China UNICOM adopts adopts this communication unit, can realize high-speed traffic; The base station of its network and terminal are abundant, and international roaming is strong, under the environment of high-speed running automobile and transregional operation; The present invention can be fast, the transregional various places broadcast program of listening to glibly, and particularly, said WCDMA unit provides wireless network to the radio reception signal processing unit; Receive network radio station information fast, at OS, under the ICP/IP protocol support that promptly Operating system provides; Through application program subelement and audio player etc., be connected to radio station server, download network station list and information thereof; And adopting display unit to realize that network radio station channel selection and relevant information show, said display unit can adopt LCD display realization visualization display and channel selection operation to support that this example is kept at the radio flow medium of radio station server in the dynamic storage cell; Pass through audio decoder decode then; Convert analog signal to through radio reception signal D/A conversion unit again and realize radio reception output, the user can hear the broadcast program of network radio station easily and quickly, can trans-regionally listen to local broadcast programs.
Existing vehicle-mounted audio signal reception device generally uses the FM/AM antenna, and what transmission channel adopted is the wireless simulation channel; Tonequality is not very desirable; Disturbed easily, can supply the quantity of channel selection very limited, and signal cover is smaller; Especially in remote rural area, mountain area or other signals cover bad place, then can not receive signal probably; Also there is legacy network audio signal reception device based on PC; But but need the support of IP basic network, can not move and listen to, volume is big; In addition; The device temperature of PC own, concussion characteristic can not satisfy the requirement of auto industry level, and therefore under automotive environment, the network sound receiving device is not well used.
In automobile, wireless use is very general, and existing vehicle-mounted radio reception all is to adopt the AM/FM mode to obtain the radio reception program, transmission be that analog signal is play; But the radius of action of automobile is increasing, and the covering of AM/FM signal often has limitation, and especially, existing automobile speed is increasingly high, and under at a high speed, the effect of AM/FM radio reception will descend greatly, has a strong impact on the radio reception quality.
In view of this, it is a kind of under high-speed cruising that this example provides, and can play the vehicle-mounted audio signal reception device with playback radio reception program preferably.
As shown in Figure 2, this example adopts the WCDMA unit to connect the WCDMA base station, realizes that the WCDMA base station is connected with network between the automobile; The radio reception signal processing unit is connected with the WCDMA unit through interface unit, downloads, receives the digital signal of network radio station, and adopts the relevant information of dynamic storage cell storage; WCDMA unit bandwidth is enough wide, and transmitted data on network is fast, correspondingly; Interface unit adopts USB interface or UART interface, and the transmission data capacity is big, speed is fast, makes based on the vehicle-mounted audio signal reception device audio frequency of WCDMA more smooth; Transmission of digital signals is not allowed to be subject to disturb, and tonequality is better, and signal cover is wide; Under the trans-regional high-speed cruising, also can listen to each regional broadcast program, also can receive smoothness, high-quality broadcast singal, realize online request or playback broadcast audio program even the location is remote rural area or mountain area.
The existing WCDMA wide network coverage, this example adopts technique scheme, and its scope of listening to the radio reception program will less receive its position effects, and speed is fast; Signal is not subject to disturb, and, to the stability problem that receives at a high speed; This example also is provided with antenna element especially, has further improved the listening quality of vehicle environment, said antenna element; Adopt the antenna of lengthening, and can be fixedly installed in behind the automobile on glass, particularly in high-speed mobile; Strengthen the intensity that receives signal, reduced distorted signals, on glass after being attached to antenna simultaneously; Can effectively reduce the interference of concussion, realize high-quality wireless program request or playback broadcast audio program, trans-regionally also can listen to local broadcast programs signal.
Embodiment 2:
Different with embodiment 1 is, said radio reception signal processing unit adopts the CPU subelement, and said CPU subelement is connected with the WCDMA unit through interface unit, download reception network radio station information.
As shown in Figure 3, said CPU subelement has operating system nucleus, and said WCDMA unit provides internet wireless network to the CPU subelement; At OS, under the ICP/IP protocol support that promptly Operating system provides, through application program subelement and audio player etc.; Be connected to radio station server, download network station list and information thereof, and adopt display unit to realize that network radio station channel selection and relevant information show; This example is kept at the radio flow medium of radio station server in the dynamic storage cell; Through audio decoder decode, convert analog signal to through radio reception signal D/A conversion unit again and realize radio reception output then, user vehicle can be heard the broadcast program of network radio station easily and quickly; When interface unit adopted the UART interface, USB interface shown in Fig. 3 drives also need correspondingly become the driving of UART interface.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception signal processing unit adopts the CPU subelement; Said CPU subelement has operating system, is connected with the WCDMA unit through interface unit, can more fast and effeciently download the network radio station information that receives; Disposal ability is strong, and the upper strata audio decoder is used to strengthen audio decoder, also is convenient to realize better digital-to-analogue conversion and output.
Embodiment 3:
Different with embodiment 2 is that this routine said dynamic storage cell adopts DDR2 memory bar.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively, disturbs little; Distortion is few, and area coverage is wide, has realized high-quality onboard wireless program request or playback broadcast audio program; On this basis, said dynamic storage cell adopts the DDR2 memory bar, and the dynamic memory ability is strong; Audio frequency is more smooth, can either satisfy the dynamic memory demand of vehicle-mounted radio reception under the high-speed cruising, also can adapt to the demand of shaking characteristic.
Embodiment 4:
Different with embodiment 3 is that this routine said DDR2 memory bar is the 1G memory bar.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said dynamic storage cell adopts the DDR2 memory bar of 1G; Can satisfy the dynamic memory of vehicle-mounted radio reception under the high-speed cruising and the demand of concussion characteristic; Simultaneously, also avoid the height of a certain device of simple pursuit to dispose and the waste resource, controlled cost.
Embodiment 5:
Different with embodiment 2 is that this routine said radio reception output unit comprises the esd protection subelement.
Wherein, ESD is the abbreviation of Electro-Static discharge, and said esd protection subelement is the subelement that is used to realize electrostatic discharge protection.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception output unit comprises the esd protection subelement; Before output, carry out electrostatic discharge protection and handle, guarantee the output of audio frequency reliable and stable ground, effectively get rid of the influence of static.
This example also is applicable to embodiment 3 and the vehicle-mounted audio signal reception device shown in the embodiment 4.
Embodiment 6:
Different with embodiment 5 is that this routine said radio reception output unit also comprises the filtering interfering subelement.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, carried out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis; Said radio reception output unit also comprises the filtering interfering subelement, and the interference that the filtering audio-frequency information receives in processing procedure further guarantees the output of audio frequency reliable and stable ground.
Embodiment 7:
Different with embodiment 6 is that this routine said filtering interfering subelement adopts 33pF electric capacity.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, carried out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis; Said radio reception output unit also comprises the filtering interfering subelement, and said filtering interfering subelement adopts 33pF electric capacity, adopts the effectively interference that in processing procedure, receives of filtering audio-frequency information of 33pF electric capacity; Avoid the sudden change and the interference of audio signal, further guarantee the output of audio frequency reliable and stable ground again.
Embodiment 8:
Different with embodiment 7 is that the working temperature of this routine said radio reception signal processing unit, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, WCDMA unit, antenna element and PMU all is controlled to be-20 degrees centigrade to 70 degrees centigrade.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through the WCDMA unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Carry out electrostatic discharge protection and filtering interfering processing before the vehicle-mounted radio reception output; Guarantee the output of audio frequency reliable and stable, realized high-quality onboard wireless program request or playback broadcast audio program, on this basis; The working temperature of said radio reception signal processing unit, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, WCDMA unit, antenna element and PMU all is controlled to be-20 degrees centigrade to 70 degrees centigrade; Be very suitable for the industrial temperature characteristic demand under the automotive environment, vehicle-mounted efficiently audio signal reception device is provided, greatly reduce its failure rate.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. the vehicle-mounted audio signal reception device based on WCDMA is characterized in that, comprising:
The radio reception signal processing unit;
Dynamic storage cell is connected with said radio reception signal processing unit;
Display unit is connected with said radio reception signal processing unit;
Radio reception signal D/A conversion unit is connected with said radio reception signal processing unit;
The radio reception output unit is connected with said radio reception signal processing unit through radio reception signal D/A conversion unit;
The WCDMA unit is connected with said radio reception signal processing unit through interface unit;
Antenna element is fixedly installed in behind the automobile on glassly, is connected with said WCDMA unit; And,
PMU is connected with the radio reception signal processing unit with said WCDMA unit respectively.
2. the vehicle-mounted audio signal reception device based on WCDMA according to claim 1 is characterized in that, said radio reception signal processing unit adopts the CPU subelement, and said CPU subelement is connected with the WCDMA unit through interface unit, downloads the network radio station information that receives.
3. the vehicle-mounted audio signal reception device based on WCDMA according to claim 1 and 2 is characterized in that, said dynamic storage cell adopts the DDR2 memory bar.
4. the vehicle-mounted audio signal reception device based on WCDMA according to claim 3 is characterized in that said DDR2 memory bar is the 1G memory bar.
5. the vehicle-mounted audio signal reception device based on WCDMA according to claim 1 and 2 is characterized in that said radio reception output unit comprises the esd protection subelement.
6. the vehicle-mounted audio signal reception device based on WCDMA according to claim 5 is characterized in that said radio reception output unit also comprises the filtering interfering subelement.
7. the vehicle-mounted audio signal reception device based on WCDMA according to claim 6 is characterized in that, said filtering interfering subelement adopts 33pF electric capacity.
8. the vehicle-mounted audio signal reception device based on WCDMA according to claim 6 is characterized in that, said dynamic storage cell adopts the DDR2 memory bar.
9. the vehicle-mounted audio signal reception device based on WCDMA according to claim 8 is characterized in that said DDR2 memory bar is the 1G memory bar.
10. the vehicle-mounted audio signal reception device based on WCDMA according to claim 8; It is characterized in that the working temperature of said radio reception signal processing unit, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, WCDMA unit, antenna element and PMU all is controlled to be-20 degrees centigrade to 70 degrees centigrade.
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| CN2011104265934A CN102545929A (en) | 2011-12-19 | 2011-12-19 | WCDMA based automobile-mounted radio device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104265934A CN102545929A (en) | 2011-12-19 | 2011-12-19 | WCDMA based automobile-mounted radio device |
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| CN115412109A (en) * | 2022-07-20 | 2022-11-29 | 岚图汽车科技有限公司 | In-vehicle sound signal transmission system and method |
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Application publication date: 20120704 |